DYNAMICS and ACTIVE PROCESSES - International Lithosphere ...
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6 th WORKSHOP of the ILP TASK FORCE on<br />
SEDIMENTARY BASINS<br />
hosted by the Polytechnic University of Tirana (PUTirana)<br />
<strong>DYNAMICS</strong> <strong>and</strong> <strong>ACTIVE</strong> <strong>PROCESSES</strong>:<br />
the ALBANIAN NATURAL LABORATORY<br />
<strong>and</strong> ANALOGUES<br />
ABSTRACT VOLUME <strong>and</strong> PROGRAMME<br />
TIRANA, ALBANIA<br />
November 7- November 12, 2010
Organizing Committee<br />
Kristaq MUSKA (PUTirana, Albania)<br />
Shaqir NAZAJ (PUTirana, Albania)<br />
Liviu MATENCO (VU-Amsterdam, the Netherl<strong>and</strong>s)<br />
François ROURE (IFP, France)<br />
Scientific Committee<br />
Giovanni BERTOTTI (VU-Amsterdam, the Netherl<strong>and</strong>s)<br />
Salvator BUSHATI (Academy of Sciences, Tirana, Albania)<br />
Sierd CLOETINGH (VU-Amsterdam, the Netherl<strong>and</strong>s)<br />
Carlo DOGLIONI (Univ. La Sapienza, Roma, Italy)<br />
Ilia FILI (Visoka Energy Co., Fieri, Albania)<br />
Perparim HOXHA (PUTirana, Albania)<br />
François JOUANNE (Grenoble Univ., France)<br />
Anastasia KIRATZI (Aristotle Univ., Thessaloniki, Greece)<br />
Ibrahim MILUSHI (Institute of Geosciences, Tirana, Albania)<br />
Giuseppe NARDI (Univ. Federico II, Naples, Italy)<br />
Adil NEZIRAJ (Geological Survey, Tirana, Albania)<br />
Luan NIKOLLA (National Agency of Natural Resources, Tirana, Albania)<br />
Frederik PREMTI (PUTirana, Albania)<br />
Magdalena SCHECK-WENDEROTH (GFZ, Germany)<br />
Rudy SWENNEN (KU-Leuven)<br />
Bruno TOMJELOVIC (Zagreb Univ., Croatia)<br />
Fied Trips committee<br />
Çerçir DURMISHI (PUTirana, Albania)<br />
Avni MESHI (PUTirana, Albania)<br />
Bardhyl MUCEKU (PUTirana)<br />
Kujtim ONUZI (Institute of Geosciences, Tirana, Albania)
Nr. Prénom NOM Afilation<br />
1 Myqerem TAFAJ Minister of Education <strong>and</strong> Sciences<br />
2 Jorgaq KAÇANI Rector, Polytecnic University-Tirana<br />
3 Përparim HOXHA Dean, Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
4 Arjan BEQIRAJ President, Albanian Geological Society<br />
Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
5 Kristaq MUSKA Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
6 Shaqir NAZAJ Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
7 Çerçiz DURMISHI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
8 Andon GRAZHDANI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
9 Afat SERJANI Geological Survey of Albania<br />
10 Agim GUCAJ Geological Survey of Albania<br />
11 Ilia FILI Vizoka Energy, Albania<br />
12 Ajet MEZINI Vizoka Energy, Albania<br />
13 Alfred FRASHERI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
14 Gjergji FOTO Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
15 Thoma KORINI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
16 Brunilda BRUSHULLI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
17 Luan NIKOLLA National Agency, Tirana<br />
18 Salvatore BUSHATI Academy of Sciences, Tirana<br />
19 Vilson SILO Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
20 Erald SILO Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
21 Irakli PRIFTI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
22 Bardhyl MUCEKU Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
23 Ariana BEJLERI Polytechnic University-Tirana<br />
24 Flutura HAFIZI Polytechnic University-Tirana<br />
25 Shpresa SHUBLEKA Polytechnic University-Tirana<br />
26 Rrapo ORMENJI Polytechnic University-Tirana<br />
27 Viktor DODA Polytechnic University-Tirana<br />
28 Shkëlqim DAJA Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
29 Jakup HOXHAJ Polytechnic University-Tirana<br />
30 Fatbardha CARA Polytechnic University-Tirana<br />
31 Hasan KULIÇI Polytechnic University-Tirana<br />
32 Sheribane ABAZI Polytechnic University-Tirana<br />
33 Rexhep KOÇI Polytechnic University-Tirana<br />
34 Neki KUKA Polytechnic University-Tirana<br />
35 Myslym PASHA Polytechnic University-Tirana<br />
36 Siasi KOCIU Polytechnic University-Tirana<br />
37 Artan TASHKO Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
38 Ibrahim MILUSHI Polytechnic University-Tirana<br />
39 Gjon KAZA Polytecnic University-Tirana<br />
40 Avni MESHI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
41 Mensi PRELA Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
42 Suada LUZATI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
43 Majlinda CENAMERI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
44 Flora PROGNI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
45 Neritan SHKODRANI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
46 Elsa DINDI Faculty of Geology <strong>and</strong> Mines, PU-Tirana
47 Vangjel MELO Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
48 Ervin LULA Polytechnic University-Tirana<br />
49 Agim MESONJESI Polytechnic University-Tirana<br />
50 Edmond DUSHI Polytechnic University-Tirana<br />
51 Ylbert MUCEKU Polytechnic University-Tirana<br />
52 Jani SKRAMI Polytechnic University-Tirana<br />
53 Mehmet ZAÇAJ Polytechnic University-Tirana<br />
54 Piro LEKA Polytechnic University-Tirana<br />
55 Petrika KOSHO Polytechnic University-Tirana<br />
56 Petraq NAÇO Polytechnic University-Tirana<br />
57 Fatbardha VINÇANI Polytechnic University-Tirana<br />
58 Agim SINOJMERI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
59 Ana QORRI Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
60 Eralda DAJA Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
61 Erind ZAÇE Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
62 Frederik PREMTI Polytechnic University-Tirana,<br />
Director of <strong>International</strong> Relations<br />
63 Kujtim ONUZI Polytecnic University-Tirana<br />
64 Adil NEZIRAJ Geological Survey, Tirana, Albania<br />
65 Zamir BEGA OMV, Buccarest, Romania<br />
66 Betim MUCO General Dynamics Inc., Rockville, USA<br />
67 Rol<strong>and</strong> BARBULLUSHI Baropex, UK<br />
68 Skender LIPO Faculty of Geology <strong>and</strong> Mines, PU-Tirana<br />
69 Edmond HOXHA Faculty of Geology <strong>and</strong> Mines, PU-Tirana
6th workshop of the ILP Task Force on Sedimentary Basins<br />
Monday, November 8, 2010<br />
Tirana<br />
9- 10h30: Opening Session (chairs: Kristaq Muska <strong>and</strong> Magdalena Scheck-Wenderoth)<br />
9-9h15: Welcome addresses by:<br />
Pr. Dr. Myqerem Tafaj (Minister of Education <strong>and</strong> Sciences, Albania)<br />
Pr.Dr. Jorgaq Kaçani (Rector, PU-Tirana)<br />
Pr. Dr. Perparim Hoxha (Dean, Faculty of Geology <strong>and</strong> Mines, PU-Tirana)<br />
Pr.Dr. Arian Beqiraj (President , Albanian Geological Society)<br />
9h15-9h45: Sierd Cloetingh (ILP President, VU-Amsterdam): Aims <strong>and</strong> perspectives of<br />
ILP <strong>and</strong> Topo-Europe.<br />
9h45-10h15: Stefan Schmid, Daniel Bernoulli, B. Fügenshuh, Liviu Matenco, Rol<strong>and</strong><br />
Oberhänsli, S. Schlefer <strong>and</strong> K. Kustaszevski (univ. of Basel, VU-<br />
Amsterdam, Univ. of Potsdam): The Dinarides-Hellenides as a part of the<br />
Carpathians-Alps system: ancient <strong>and</strong> recent reorganization of a complex<br />
system of mountain chains.<br />
10h15-10h45: Hendrik Vogel, B. Wagner, T. Wilke, A. Grazhdani, G. Kostoski, S.<br />
Krastel, K. Reicherter <strong>and</strong> G. Zanchelta (univ. of Köln, Geomar, univ. of<br />
Aachen <strong>and</strong> Pisa): SCOPSCO: Scientific Collaboration on Past Speciation<br />
Conditions in Lake Ohrid (Albania/Macedonia): towards an ICDP deep<br />
drilling.<br />
10h45-11h10: Coffee Break <strong>and</strong> Poster Sessions<br />
11h10-12h30: Circum-Mediterranean, Alpine <strong>and</strong> Carpathians forel<strong>and</strong>-<strong>and</strong>-thrust belt<br />
systems <strong>and</strong> analogues (Part I) (chairs: Stefan Schmid <strong>and</strong> Shaqir Nazaj)<br />
11h10-11h30: Rol<strong>and</strong> Barbullushi (Baropex, UK): Structural evolution of southern Albania<br />
thrust belt.<br />
11h30-11h50: Afat Serjani <strong>and</strong> Agim Gucaj (Geological Survey of Albania, Tirana):<br />
Correlation of the western structures of Ionian Zone <strong>and</strong> the relation with<br />
African plate (Adria micro-plate).<br />
11h50-12h10: Andrea Argnani (CNR, Bologna): Variations in structural style along the<br />
front of the Albanides fold belt <strong>and</strong> the heritage of Mesozoic palaeogeography.<br />
12h10-12h30: Piero Casero <strong>and</strong> François Roure (Rome <strong>and</strong> IFPEnergiesNouvelles):<br />
Geological meaning of the Sazani zone (Albania), implications on the regional<br />
paleogeographic setting.<br />
12h30-14h: Lunch Buffet<br />
14-15h30: Circum-Mediterranean, Alpine <strong>and</strong> Carpathians forel<strong>and</strong>-<strong>and</strong>-thrust belt<br />
systems <strong>and</strong> analogues (Part II) (chairs: Afat Serjani <strong>and</strong> Dirk Nieuwl<strong>and</strong>)<br />
I
14-14h30: Liviu Matenco <strong>and</strong> M. Ducea (VU-Amsterdam <strong>and</strong> univ. of Arizona): On the<br />
link between orogenic shortening <strong>and</strong> "back-arc" extensional collapse in low<br />
topography orogens.<br />
14h30-14h50: Nico Hardebol <strong>and</strong> Giovanni Bertotti (univ. of Delft <strong>and</strong> VU-Amsterdam):<br />
Contraction <strong>and</strong> vertical movements in the Gargano Promontory <strong>and</strong> adjacent<br />
offshore: implication for the tectonics of the South Adriatic domain.<br />
14h50-15h10: François Roure, Piero Casero, <strong>and</strong> Belkacem Addoum<br />
(IFPEnergiesNouvelles, Rome <strong>and</strong> Sonatrach): Lateral <strong>and</strong> temporal evolution<br />
of the Alpine inversion of the North African margin from the Tellian Atlas to<br />
the Ionian Basin <strong>and</strong> Eastern Mediterranean.<br />
15h10-15h40: Coffee Break <strong>and</strong> Poster Sessions<br />
15h40-17h10: Back-arc <strong>and</strong> post-orogenic extension (chairs: Jean-Louis Mugnier <strong>and</strong> Liviu<br />
Matenco)<br />
15h40-16h: Alfonsa Milia, Eugenio Turco <strong>and</strong> Maurizio Torrente (CNR, Naples, univ.<br />
of Sannio): Four dimensional geological evolution of the Eastern Tyrrhenian<br />
Margin <strong>and</strong> geodynamic implications<br />
16h-16h20: Mary Ford (univ. of Nancy, CRPG): Corinth rifting <strong>and</strong> its role in the<br />
geodynamic evolution of the Aegean-Ionian region.<br />
16h20-16h40: Nadine Ellouz-Zimmermann, Raymi Castilla <strong>and</strong> François Roure<br />
(IFPEnergiesNouvelles): Impact of basement configuration <strong>and</strong> sediment<br />
architecture on gravity gliding on under-compacted shale decollements.<br />
16h40-17h: Christophe Pascal, Aline Saintot, A. Nasuti, E. Lunberg <strong>and</strong> C. Juhlin<br />
(NGU, Norway, <strong>and</strong> univ. of Uppsala, Sweden): An integrated study of the<br />
MØre-TrØndelag fault complex, Mid Norway.<br />
17h-18h30: Poster Sessions<br />
Tuesday, November 9, 2010<br />
9-12h30: Albanian exploration, petroleum systems <strong>and</strong> analogues (Part I) (Chairs:<br />
Ilia Fili <strong>and</strong> Ibrahim Milushi)<br />
9-9h30: Zamir Bega (OMV-Petrom): Platform carbonate subthrusts as major<br />
hydrocarbon plays in NW Albania-Montenegro region.<br />
9h30-9h50: Alfred Frasheri (Polytechnic univ., Tirana): Geophysical outlook on structure<br />
of the Albanides.<br />
9h50-10h20: Dirck Nieuwl<strong>and</strong> (NewTec <strong>International</strong> BV, Leiden): The mechanics of<br />
thrust tectonics, the evolution of the Albanides <strong>and</strong> implications for<br />
hydrocarbon exploration.<br />
10h20-10h50: Coffee Break <strong>and</strong> Poster Sessions<br />
10h50-11h10: Anne Jardin, Luan Nikolla <strong>and</strong> François Roure (IFPEnergiesNouvelles <strong>and</strong><br />
National Agency, Tirana): Subsalt depth seismic imagery <strong>and</strong> structural<br />
interpretation in the Dumre area, Albania.<br />
II
11h10-11h30: Vilson Silo, Salvatore Bushati <strong>and</strong> Erald Silo (Polytechnic univ., Tirana):<br />
Gas detection in the Peri-Afriatic Depression area by true amplitude processing<br />
of seismic data.<br />
11h30-11h50: Irakli Prifti <strong>and</strong> Kristaq Muska (Polytechnic univ., Tirana): Hydrocarbon<br />
occurrences <strong>and</strong> petroleum geochemistry of Albanian oils.<br />
11h50-12h10: Alfred Frasheri (Polytechnic univ., Tirana): Temperature signals from<br />
Albanides depth.<br />
12h10-13h40: Lunch Buffet<br />
13h40-16h40: Albanian exploration, petroleum systems <strong>and</strong> analogues (Part II) (Chairs:<br />
Salvatore Bushati <strong>and</strong> Zamir Bega)<br />
13h40-14h10: Ruddy Swennen (KU-Leuven): Diagenetic history of Cretaceous carbonate<br />
reservoir analogues of the Ionian <strong>and</strong> Kruja zones.<br />
14h10-14h30: Çerçis Durmishi (Polytechnic univ., Tirana): Sequence statigraphy of deepwater<br />
Serravalian siliciclastics of the Zverneci outcrop (Vlora region, Albania).<br />
14h30-14h50: Vilson Silo, Kristaq Muska <strong>and</strong> Erald Silo (Polytechnic univ., Tirana):<br />
Hydrocarbon potential in Molasse reservoirs, Vlora-Elbasan region, Albania.<br />
14h50-15h10: Brunilda Brushulli <strong>and</strong> Gjergji Foto (Polytechnic univ., Tirana): Use of<br />
capillary pressure measurements to assess the flow units in oil-bearing<br />
carbonate reservoirs of the Albanian Ionian Zone.<br />
15h10-15h40: Coffee Break <strong>and</strong> Poster Sessions<br />
15h40-16h: Yvonne Cherubini, Mauro Cacace, Magdalena Scheck-Wenderoth,<br />
M<strong>and</strong>o Guido Blöcher <strong>and</strong> Björn Lewerenz (GFZ): Impact of single faults<br />
on the fluid flow <strong>and</strong> heat transport: first results from 3D finite elements<br />
simulations.<br />
16-16h20: François Roure, Laurie Barrier, Jean-Paul Callot, Kristaq Muska <strong>and</strong><br />
Nadège Vilasi (IFPEnergiesNouvelles, Polytechnic univ., Tirana): Kinematic<br />
<strong>and</strong> petroleum modelling in the Albanides.<br />
16h20-16h40: Magdalena Scheck-Wenderoth (GFZ): Shallow <strong>and</strong> deep control on the<br />
thermal structure of basins as inferred by 3 D numerical models: examples<br />
from the Central European Basin System.<br />
16h40-17h40: Mantle tomography, lithospheric <strong>and</strong> crustal architecture (chairs: Sierd<br />
Cloetingh <strong>and</strong> Betim Muco)<br />
16h40-17h: Abdullah Al Amri (King Saud Univ., Riyad): Seismic sources zones of the<br />
Arabian Peninsula <strong>and</strong> adjacent countries.<br />
17h-17h20: Abdullah Al Amri <strong>and</strong> Arthur Rodgers (King Saud Univ., Riyad): Structure<br />
of the lithosphere <strong>and</strong> upper mantle across the Arabian Peninsula.<br />
17h20-17h40: Magdala Tesauro, Mikhail Kaban <strong>and</strong> Sierd Cloetingh (GFZ <strong>and</strong> VU-<br />
Amsterdam): Strengh <strong>and</strong> weakness of the World lithosphere.<br />
Wednesday, November 10, 2010<br />
8h20-13h10: TOPO-Albania (chairs: Bardhyl Muceku <strong>and</strong> Hendrik Vogel)<br />
III
8h20-8h50: Anastasia Kiratzi (Aristotle univ. of Thessaloniki): Seismic sequences in<br />
Dibra region (Albania) <strong>and</strong> implications for the seismic hazard of the region.<br />
8h50-9h10: Ariana Bejleri, Flutura Hafizi <strong>and</strong> Shpresa Shubleka (Polytechnic univ.,<br />
Tirana): Analyzing seismic situation in the Dibra region by digitalization of<br />
seismic events.<br />
9h10-9h40: Betim Muco (General Dynamics Inc., USA): ALBASEIS, risk assessment <strong>and</strong><br />
seismicity of Albania.:<br />
9h40-10h: Rrapo Ormeni, Shkelqim Daja <strong>and</strong> Viktor Doda (Polytechnic univ.,<br />
Tirana): The strongest earthquakes occurred in Albania during 2009 (M>5.0)<br />
<strong>and</strong> their seismogenic zones.<br />
10h-10h20: Olivier Lacombe, Nadège Vilasi <strong>and</strong> François Roure (univ. Paris VI <strong>and</strong><br />
IFPEnergiesNouvelles): From paleostress to paleoburial in fold-thrust belts:<br />
Preliminary results from calcite twin analysis.<br />
10h20-10h40: Coffee Break <strong>and</strong> Poster Sessions<br />
10h40-11h10: Christian Beck (univ. of Savoie, Chambéry): Sedimentological contribution to<br />
seismic hazards assessment: Lacustrine <strong>and</strong> marine archives along active fault<br />
systems.<br />
11h10-11h30: Jakup Hoxhaj, Fatbardha Cara, Hasan Kuliçi <strong>and</strong> Sheribane Abazi<br />
(Polytechnic univ., Tirana, <strong>and</strong> Geological Survey of Albania): Stratigraphy<br />
<strong>and</strong> lithological composition of the Quaternary sedimentation in the Albanides.<br />
11h30-12h: François Jouanne, Jean-Louis Mugnier, Rexhep Koçi, S. Bushati, K.<br />
Matev, N. Kuka, I. Shiviko, M. Pasha. <strong>and</strong> S. Kociu (univ. of Savoie,<br />
Chambéry, <strong>and</strong> Institute of Seismology, Tirana): GPS constrains on current<br />
tectonics of Albania.<br />
12h-12h20: Bardhyl Muceku, Georges H. Mascle, Peter van der Beek, Matthias<br />
Bernet, Peter Reiners <strong>and</strong> Artan Tashko (PT University, Tirana, univ.<br />
Grenoble): Low temperature thermochronometry in Internal Albanides:<br />
Quantitative constraints on exhumation rate <strong>and</strong> tectonic implications.<br />
12h20-12h40: Klaus Reicherter, Katja Lindhorst, Nadine Hoffmann, Sebastian Krastel-<br />
Gudegast, Ariane Liermann <strong>and</strong> Ulrich Glasmacher (univ. of Aachen <strong>and</strong><br />
Heidelberg, <strong>and</strong> Geomar, Kiel): Active basins <strong>and</strong> neotectonics:<br />
morphotectonics of the Lake Ohrid Basin (FYROM <strong>and</strong> Albania).<br />
12h40-13h: Oswaldo Guzman, Jean-Louis Mugnier, Rexhep Koçi, R. Vassallo, Julien<br />
Carcaillet <strong>and</strong> E. Fouache (univ. of Savoie, Chambéry, <strong>and</strong> Institute of<br />
Seismology, Tirana): Active tectonics of Southern Albania inferred from Pre-<br />
LGM fluvial terraces geometries.<br />
13-14h: Lunch Buffet<br />
14-14h20: Shkëlqim Daja <strong>and</strong> Neritan Shkodrani (Polytechnic University, Tirana): A<br />
case study on probalistic evaluation of soil liquefaction.<br />
14h20-15h40: Albanian volcanics <strong>and</strong> ophiolites (chairs: Olivier Lacombe <strong>and</strong> Angela<br />
Jayko)<br />
1420-14h40: Ibrahim Milushi, Avni Meshi <strong>and</strong> Gjon Kaza (Polytechnic univ., Tirana):<br />
Volcano-sedimentary formations in Albania <strong>and</strong> their relation with the Mirdita<br />
Ophiolite.<br />
IV
14h40-15h: Ariana Bejleri, Mensi Prela <strong>and</strong> Flutura Hafizi (Polytechnic univ., Tirana):<br />
Digitalization of data related to the age of Albanian Ophiolites.<br />
15h-15h20: Mensi Prela (Polytechnic univ., Tirana): Stratigraphic correlation of<br />
radiolarian cherts belonging to the ophiolite-bearing <strong>and</strong> carbonatic<br />
successions<br />
15h20-15h40: Artan Tashko <strong>and</strong> Georges Mascle: (Polytechnic univ., Tirana, <strong>and</strong> univ. of<br />
Grenoble) Geochemical constraints (Nd, Pb isotopse ratios <strong>and</strong> trace elements)<br />
on the Mesozoic volcanism in Albania.<br />
15h40-16h20: Pannel discussion on the Albanian natural laboratory <strong>and</strong> conclusions.<br />
(Chairs: François Roure, Kristaq Muska, Liviu Matenco <strong>and</strong> François Jouanne)<br />
17h30: Departure for the post-conference fieldtrip<br />
List of Posters<br />
Laurie Barrier, Emily Albouy, Sazan Guri, Jean-Luc Rudkiewicz, Spiro Bonjakes,<br />
Kristaq Muska <strong>and</strong> Rémi Eschard (IPGP <strong>and</strong> IFPEnergiesNouvelles): Structural <strong>and</strong><br />
stratigraphic history of the Outer Albanides from restored cross-sections,<br />
chronostratigraphic chart <strong>and</strong> coupled kinematic/stratigraphic forward modelling.<br />
Arjan Beqiraj, Suada Luzati <strong>and</strong> Majlinda Cenameri (Polytechnic University, Tirana):<br />
Hydrochemical features of the Kavaja groundwater basin (Preadriatic Depression,<br />
Albania).<br />
Arjan Beqiraj, F. Progni <strong>and</strong> Majlinda Cenameri (Polytechnic University, Tirana):<br />
Groundwater vulnerability assessment to contamination (Tirana-Fiske Kupe Basin,<br />
Albania).<br />
Elsa Dindi (Polytechnic University, Tirana): The role of geological factor in the chemical<br />
content of the Quaternary gravel aquifers of the Preadriatic Depression.<br />
Cerçis Durmishi <strong>and</strong> Shkelqim Daja (Polytechnic University, Tirana): Spectacular evidence<br />
of sedimentary structures of the Serravalian deposits in the Zverneci outcrops (Albania).<br />
Cerçis Durmishi, Vangjel Melo <strong>and</strong> Ervin Lula (Polytechnic University, Tirana): Kink<br />
b<strong>and</strong>s <strong>and</strong> chevron folds characteristics of the Sar<strong>and</strong>a Anticline: Estimation of the<br />
Geologist's mosaic, southwestern Albania.<br />
Edmond Dushi, Ylbert Muceku, J. Skrami <strong>and</strong> M. Zaçaj (Polytechnic University, Tirana):<br />
Instrumental seismological data <strong>and</strong> geophysical investigation of 2009 earthquake at<br />
Gjorica, Dibra Region, Albania).<br />
Gjergji Foto, Ilia Fili, Thoma Korini <strong>and</strong> Brunilda Brushulli (Polytechnic univ., Tirana):<br />
Tectonic movements in the Kremenare-Ballsh structures can hide new oil <strong>and</strong> gas traps.<br />
Rexhep Koçi, Agim Mesonjesi, Jean-Louis Mugnier, François Jouanne, Julien Carcaillet<br />
<strong>and</strong> Oswaldo Guzman (Institute of Geosciences, Tirana, <strong>and</strong> univ. of Savoie,<br />
Chambéry): River Terraces <strong>and</strong> their age determination in Albania.<br />
Piro Leka, Petrika Kosho, Petraq Naço <strong>and</strong> Fatbardha Vinçani (Institute of Geosciences,<br />
Tirana): Identification of the neotectonic movements through geophysical methods in<br />
the Elbasan basin<br />
Ajet Mezini <strong>and</strong> Ilia Fili (Vizoka Energy):Hydrodynamic conditions of the Visoka field<br />
trapping.<br />
Maghfouri Moghddam (univ. of Lorestan, Iran): Biostratigraphy of the Tarbur Formatrion,<br />
Zagros Basin.<br />
V
Ylbert Muceku, Jani Skrami, Edmond Dushi <strong>and</strong> Mehmet Zaçaj (Polytechnic University,<br />
Tirana): The engineering geological <strong>and</strong> geophysical studies of l<strong>and</strong>-use planning in<br />
Adriatic Coastal Plains-Divjaka, Albania.<br />
Kristaq Muska (Polytechnic University, Tirana): Thermal evolution, hydrocarbon generation<br />
<strong>and</strong> HC potential of Triassic <strong>and</strong> Liassic carbonate reservoirs in the Ionian Zone<br />
(Albania).<br />
Rrapo Ormeni <strong>and</strong> Shaqir Nazaj (Polytechnic univ., Tirana): 1D-velocity models <strong>and</strong><br />
lateral contrasts in zones divided from Shkoder-Peja fault of Albania.<br />
Mensi Prela (Polytechnic univ., Tirana): The age of radiolarian cherts in the western<br />
carbonate peripheral units of the Albanian ophiolites.<br />
Yolaine Rubert, Mohamed Jati, Corinne Loisy, Adrian Cerepi, Gjergji Foto <strong>and</strong> Kristaq<br />
Muska (Bordeaux Univ., France, Polytechnic Univ., Tirana): Sedimentology of<br />
resedimented carbonates: facies <strong>and</strong> geometrical characterization of Upper Cretaceous<br />
calciturbidite system in Albania.<br />
Yolaine Rubert, Mohamed Jati, Corinne Loisy, Adrian Cerepi, Gjergji Foto <strong>and</strong> Kristaq<br />
Muska (Bordeaux Univ., France, Polytechnic Univ., Tirana): Reservoir properties of<br />
resedimented carbonates: petrophysical characterization of Upper Cretaceous turbiditic<br />
systems in Albania.<br />
Agim Sinojmeri, Cerçis Durmishi, Ana Qorri, Eralda Daja <strong>and</strong> Erind Zaçe (Polytechnic<br />
University, Tirana): Recent sediments on Vjosa River deltaic littoral.<br />
Nadège Vilasi, Jean-Paul Callot, Kristaq Muska, François Roure <strong>and</strong> Ruddy Swennen<br />
(IFPEnergiesNouvelles, Polytechnic univ., Tirana, <strong>and</strong> KU-Leuven: Characterization of<br />
the fluid flow in the Albanides forel<strong>and</strong> fold-<strong>and</strong>-thrust belts (Southern Albania).<br />
VI
ABAZI Sheribane 71<br />
ADDOUM Belkacem 155<br />
AL AMRI Abdullah 1<br />
ALBOUY Emily 11<br />
Al HOSANI Khalid 55<br />
Al MAHMOUDI Saleh 55<br />
ARGNANI Andrea 5<br />
BARBULLUSHI R. 9<br />
BARE Vilson 61<br />
BARRIER Laurie 11, 149<br />
BECK Christian<br />
BEGA Zamir 13<br />
BEJLERI Ariana 17, 19<br />
BEQIRAJ Arjan 21, 27<br />
BERNET Matthias 111<br />
BERNOULLI Daniel 167<br />
BERTOTTI Giovanni 67<br />
BLOCHER M<strong>and</strong>o Guido 35<br />
BONJAKES Spiro 11<br />
BRUSHULLI Brunilda 31<br />
BUSHATI Salvatore 61, 75, 181<br />
CACACE Mauro 35, 165<br />
CALLOT Jean-Paul 149, 197<br />
CARA Fatbardha 71<br />
CARCAILLET Julien 63, 81<br />
CASERO Piero 155<br />
CASTILLA Raymi 51<br />
CENAMERI Majlinda 21, 27<br />
CEREPI Adrian 157, 161<br />
CHERUBINI Yvonne 35<br />
CLOETINGH Sierd 37, 193<br />
DAJA Eralda 183<br />
DAJA Shkelqim 39, 45, 125<br />
DINDI Elsa 41<br />
DODA Viktor 129<br />
DUCEA M. 95<br />
DURMISHI Cerçis 43, 45, 47, 183<br />
DUSHI Edmond 51, 109<br />
ELLOUZ-ZIMMERMANN Nadine 55<br />
ESCHARD Rémi 11<br />
FILI Ilia 97<br />
FOTO Gjergji 31, 157, 161<br />
FOUACHE E. 63<br />
FRASHERI Alfred 59, 61<br />
FORD Mary 57<br />
FUGENSHUH B. 167<br />
GAHNOOG Abdullah 55<br />
GLASMACHER Ulrich 149<br />
CONTENTS<br />
VII<br />
GRAZHDANI A. 199<br />
GUCAJ Agim 173<br />
GURI Sazan 11<br />
GUZMAN Oswaldo 63, 81<br />
HAFIZI Flutura 17, 19<br />
HARDEBOL Nico 67<br />
HOFFMANN Nadine 149<br />
HOXHAJ Jakup 71<br />
JARDIN Anne 73<br />
JATI Mohamed 157, 161<br />
JOUANNE François 63, 75, 81<br />
JUHLIN C. 133<br />
KABAN Mikhail 193<br />
KAZA Gjon 105<br />
KIRATZI Anastasia 77<br />
KOCI Rexhep 63, 75, 81<br />
KOCIU S. 75<br />
KORINI Thoma<br />
KOSHO Petrika 89<br />
KOSTOSKI G. 199<br />
KRASTEL S. 199<br />
KRASTEL-GUDEGAST Sebastian 149<br />
KUKA N. 75<br />
KULICI Hasan 71<br />
KUSTASZEVSKI K<br />
LACOMBE Olivier 87<br />
LEKA Piro 89<br />
LEWERENZ Björn. 35<br />
LIERMANN Ariane 149<br />
LINDHORST Katja 149<br />
LIPO Skender 93<br />
LOISY Corinne 157, 161<br />
LULA Ervin 47<br />
LUNBERG E. 129<br />
LUZATI Suada 21<br />
MASCLE Georges 11, 187<br />
MATENCO Liviu 95, 167<br />
MATEV K. 75<br />
MAYSTENKO Yuriy 165<br />
MELO Vangjel 47<br />
MESHI Avni 105<br />
MESONJESI Agim 81<br />
MEZINI Ajet 97<br />
MILIA Alfonsa 101<br />
MILUSHI Ibrahim 105<br />
MOGHDDAM Maghfouri 107<br />
MUCEKU Bardhyl 111<br />
MUCEKU Ylber 41, 109
MUCO Betim 113<br />
MUGNIER Jean-Louis 63, 75, 81<br />
MUSKA Kristaq 11, 117, 137, 149,<br />
157, 161, 179<br />
NACO Petraq 89<br />
NASUTI A. 129<br />
NAZAJ Shaqir 127<br />
NIEUWLAND Dirck 121<br />
NIKOLLA Luan 73<br />
OBERHANSLI Rol<strong>and</strong> 167<br />
ORMENI Rrapo 125, 127<br />
PASCAL Christophe 129<br />
PASHA M. 75<br />
PRELA Mensi 17, 133, 136<br />
PRIFTI Irakli 137<br />
PROGNI F. 27<br />
QORI Ana 145, 183<br />
REICHERTER Klaus 149, 199<br />
REINERS Peter 111<br />
RODGERS Arthur 1<br />
ROURE François 55, 73, 87, 149, 155,<br />
197<br />
RUBERT Yolaine 157, 161<br />
RUDKIEWICZ Jean-Luc 11<br />
SAINTOT Aline 133<br />
SCHECK-WENDEROTH M. 35, 165<br />
SCHLEFER S. 167<br />
VIII<br />
SCHMID Stephan 167<br />
SERJANI Afat 173<br />
SHIVIKO I. 75<br />
SHKODRANI Neritan 39<br />
SHUBLEKA Shpresa 19<br />
SILO Erald 179, 181<br />
SILO Vilson 179, 181<br />
SINOJMERI Agim 183<br />
SKRAMI Jani 109<br />
SWENNEN Rudy 185, 197<br />
TASHKO Artan 111, 187<br />
TESAURO Magdala 193<br />
TORRENTE Maurizio 101<br />
TURCO Eugenio 101<br />
USTASZEWSKI K. 167<br />
van der BEEK Peter 111<br />
VASSALLO R.<br />
VILASI Nadège 87, 149, 197<br />
VINCANI Fatbardha 89<br />
VOGEL Hendrik 199<br />
WAGNER B. 199<br />
WILKE T. 199<br />
ZACAJ Mehmet 51, 109<br />
ZACE Erind 183<br />
ZANCHETTA G. 199
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
STRUCTURE of the LITHOSPHERE <strong>and</strong> UPPER MANTLE<br />
across the ARABIAN PENINSULA<br />
Abdullah AL-AMRI 1 <strong>and</strong> Arthur RODGERS 2<br />
1. Seismic Studies Center <strong>and</strong> Geology Department, King Saud University Riyadh, SAUDI<br />
ARABIA, amri444@yahoo.com<br />
2. Seismology Group, Energy <strong>and</strong> Environment Directorate, Lawrence Livermore National<br />
Laboratory, Livermore CA USA, rodgers7@llnl.edu.org<br />
Analysis of the Arabian Peninsula presents several interesting seismological problems. On<br />
the west, rifling in the Red Sea has split a large Precambrian Shield. Active rifling is<br />
responsible for the geometry of the plate margins in the west, <strong>and</strong> southwest. To the south,<br />
similar rifling running in a more east-west direction through the Gulf of Aden has separated<br />
the Arabian Peninsula from Africa. In the northwest, the Gulf of Aqabah forms the<br />
southernmost continuation of the Dead Sea transform. The northern <strong>and</strong> northeastern<br />
boundaries of the Arabian Plate are areas of continental collision, with the Arabian Plate<br />
colliding with the Persian Plate (Fig. 1).<br />
Modern broadb<strong>and</strong> (BB) waveform data allows for the inference of seismic velocity structure<br />
of the crust <strong>and</strong> upper mantle using a variety of techniques. This presentation will report<br />
inferences of seismic structure of the Arabian Plate using BB data from various networks.<br />
Most data were recorded by the Saudi Arabian National Digital Seismic Network (SANDSN)<br />
which consists of 38 (26 BB, 11 SP) stations, mostly located on the Arabian Shield.<br />
Additional data were taken from the 1995-7 Saudi Arabian IRIS-PASSCAL Deployment (9<br />
BB stations) <strong>and</strong> other stations across the Peninsula.<br />
Crustal structure, inferred from teleseismic P-wave receiver functions, reveals thicker crust<br />
in the Arabian Platform (40-45 km) <strong>and</strong> the interior of the Arabian Shield (35-40 km) <strong>and</strong><br />
thinner crust along the Red Sea coast. Lithospheric thickness inferred from teleseismic Swave<br />
receiver functions reveals very thin lithosphere (60-80 km) along the Red Sea coast<br />
which thickens rapidly toward the interior of the Arabian Shield (100-120 km). We also<br />
observe a step of 20-40 km in lithospheric thickness across the Shield-Platform boundary.<br />
Seismic velocity structure of the upper mantle inferred from teleseismic P- <strong>and</strong> S-wave travel<br />
time tomography reveals large differences between the Shield <strong>and</strong> Platform, with the Shield<br />
being underlain by slower velocities, ±3% for P-waves <strong>and</strong> ±6% for S-waves. Seismic<br />
anisotropy was inferred from shear-wave splitting, using teleseismic SKS waveforms.<br />
1
Figure 1: Map of the Arabian Peninsula. Major tectonic features are indicated. Plate<br />
boundaries are indicated by yellow lines. Earthquakes <strong>and</strong> volcanic centers; shown as red<br />
circles <strong>and</strong> yellow diamond, respectively.<br />
Results reveal a splitting time of approximately 1.4 seconds, with the fast axis slightly east of<br />
north. The shear-wave splitting results are consistent across the Peninsula, with a slight<br />
clockwise rotation parallel for stations near the Gulf of Aqabah. In summary, these results<br />
allow us to make several conclusions about the tectonic evolution <strong>and</strong> current state of the<br />
Arabian Plate. Lithospheric thickness implies that thinning near the Red Sea has<br />
accompanied the rupturing of the Arabian-Nubian continental lithosphere. The step in the<br />
lithospheric thickness across the Shield-Platform boundary likely reveals a pre-existing<br />
difference in the lithospheric structure prior to accretion of the terranes composing the eastern<br />
Arabian Shield. Tomographic imaging of upper mantle velocities implies a single large-scale<br />
thermal anomaly underlies the Arabian Shield <strong>and</strong> is associated with Cenozoic uplift <strong>and</strong><br />
volcanism.<br />
The Moho <strong>and</strong> LAB are shallowest near the Red Sea <strong>and</strong> become deeper towards the Arabian<br />
interior. Near the coast, the Moho is at a depth of about 22-25 km. Crustal thickening<br />
continues until an average Moho depth of about 35-40 km is reach beneath the interior<br />
Arabian Shield. The LAB near the coast is at a depth of about 55 km; however it also deepens<br />
beneath the Shield to attain a maximum depth of 100-110 km. These boundary depths are<br />
comparable to those at similar distances along profile AA’. At the Shield-Platform boundary,<br />
a step is observed in the lithospheric thickness where the LAB depth increases to about 160<br />
km. (Fig.2)<br />
2
Topography, sediment <strong>and</strong><br />
basement<br />
Observed (dots) <strong>and</strong><br />
predicted (line) gravity<br />
anomaly<br />
Lithospheric cross-section<br />
with shear velocities <strong>and</strong><br />
densities<br />
basement<br />
sediment<br />
Figure 2: Topography, gravity signature, <strong>and</strong> lithospheric structure along the Arabian<br />
Peninsula. a Topography along the profile plotted with a 32x vertical exaggeration (V.E.).<br />
The sediment thickness is shown by the grey shaded areas. b Comparison of the observed<br />
gravity data from the GRACE satellites (black dots) <strong>and</strong> the calculated gravity (grey line)<br />
resulting from the structural model shown in c. The S-wave velocities (Vs) in km/s <strong>and</strong><br />
densities (�) in g/cm3 of each layer are listed (Hansen et al.,2008).<br />
References<br />
Al-Amri, A. M. (1999). The crustal <strong>and</strong> upper mantle structure of the Interior Arabian<br />
Platform. Geophysical J. <strong>International</strong>, V. 136, pp. 421 - 430.<br />
Hansen, S., Gaherty, J., Schwartz, S., Rodgers, A., <strong>and</strong> Al-Amri, A. (2008). Seismic Velocity<br />
Structure <strong>and</strong> Depth-dependence of Anisotropy in the Red Sea <strong>and</strong> Arabian Shield<br />
from Surface Wave Analysis. Journal of Geophysical Research, Vol., 113 Doi :<br />
10.1029/2007JB005335.<br />
Park Y., Nyblade, A., Rodgers, A., <strong>and</strong> Al-Amri, A. (2007). Upper mantle structure beneath<br />
the Arabian Peninsula <strong>and</strong> Northern Red Sea from teleseismic body wave tomography:<br />
Implications for the origin of Cenozoic uplift <strong>and</strong> volcanism in the Arabian Shield.<br />
Geochem. Geophy. Geosys., 8, doi : 10.1029 / 2006 GC 001566.<br />
3
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
VARIATIONS in STRUCTURAL STYLE along the FRONT of the ALBANIDES<br />
FOLD BELT <strong>and</strong> the HERITAGE of MESOZOIC PALEOGEOGRAPHY<br />
Andrea ARGNANI<br />
ISMAR-CNR, Bologna, <strong>and</strong>rea.argnani@ismar.cnr.it<br />
Along strike variations in structural style occur at all scales, from outcrops to Fold-<strong>and</strong>-Thrust<br />
Belts (FTBs), as shape <strong>and</strong> size of thrust faults are controlled by strength heterogeneity <strong>and</strong><br />
anisotropy of the rock units (Price, 1988).<br />
Frontal accretion is a critical step in the building of FTBs <strong>and</strong> often occurs in close<br />
relationship with sedimentation. In fact, the foredeep basins that are typically located at the<br />
front of FTBs (DeCelles <strong>and</strong> Giles, 1996) represent a very dynamic setting where tectonics<br />
<strong>and</strong> sedimentation interact closely, giving rise to a variety of growth strata geometries (Suppe<br />
et al., 1992). Furthermore, sedimentary load combines with thrust load to localize the<br />
successive thrust faults as both contribute to stabilize the footwall (Goff <strong>and</strong> Wiltschko,<br />
1992), ultimately controlling the spacing of thrust sheets.<br />
Topography of the forel<strong>and</strong> is likely to play a role in controlling the frontal accretion of FTBs.<br />
Although this aspect has never been addressed specifically, positive features impinging the<br />
accretionary wedge in oceanic subduction settings have been shown to greatly affect both<br />
thrust geometry <strong>and</strong> wedge topography (Lallem<strong>and</strong> <strong>and</strong> Le Pichon, 1987; McCann <strong>and</strong><br />
Habermann, 1989; Dominguez et al., 2000).<br />
This contribution addresses some geological factors controlling the large-scale variations in<br />
structural style of FTBs, as observed at the Albanide thrust front. The structure <strong>and</strong> evolution<br />
of the Albanide fold-<strong>and</strong>-thrust belt has been well worked out thanks to good quality outcrops<br />
<strong>and</strong> subsurface exploration (Papa, 1970; Velaj, et al.,1999; Niewl<strong>and</strong> et aal., 2001; Roure et<br />
al., 2004). However, only limited information are available in the public domain for the<br />
Albanina offshore (Ballauri et al., 2002) <strong>and</strong> palaeogeographic reconstructions lack reliable<br />
constraints (e.g., Robertson <strong>and</strong> Shallo, 2000). The front of the W-verging Albanide fold<strong>and</strong>-thrust<br />
belt <strong>and</strong> its adjacent forel<strong>and</strong> have been investigated using a grid of seismic<br />
reflection profiles, purposely acquired in the Southern Adriatic Sea (Argnani et al., 1994,<br />
1996).<br />
The analysisi of seismic profiles shows that the structural style of the external part of the fold<strong>and</strong>-thrust<br />
belt <strong>and</strong> the evolution of the related foredeep basin (Fig. 1) are strongly controlled<br />
by the nature of the Mesozoic units that are progressively accreted to the belt, namely the<br />
Apulian Platform <strong>and</strong> its adjacent deep-water basins: The impingement of the FTB on<br />
platform-to-basin Mesozoic domains, trending at an angle with respect to the thrust front, can<br />
account for the observed large-scale variation in structural style. Moreover, the structural<br />
contour map of the base of the Oligo-Miocene clastic succession (Fig. 1) indicates that also<br />
the foredeep development is largely controlled by the Mesozoic paleogeography, with larger<br />
thickness reached offshore of northern Albania where the Mesozoic pelagic basin is located<br />
(Fig. 2). Finally, the along strike variation in mechanical stratigraphy at the thrust front is<br />
promoting the growth of an incipient basin-controlled salient (Macedo <strong>and</strong> Marshak, 1999)<br />
north of the thick Apulian platform carbonates (Fig. 1), where the foredeep sedimentary fill<br />
reaches its maximum thickness.<br />
5
REFERENCES<br />
Argnani A., Favali P., Frugoni F., Gasperini M., Ligi M., Marani M., Mattietti G. <strong>and</strong> Mele<br />
G., 1993, Forel<strong>and</strong> deformational pattern in the Southern Adriatic Sea. Ann. Geof., 36,<br />
229-247.<br />
Argnani A., Bortoluzzi G., Favali P., Frugoni F., Gasperini M., Ligi M., Marani M., Mattietti<br />
G. <strong>and</strong> Mele G., 1994, Forel<strong>and</strong> Tectonics in the Southern Adriatic Sea. Mem. Soc. Geol.<br />
It., 48, 573-578.<br />
Argnani A., Bonazzi C., Evangelisti D., Favali P., Frugoni F., Gasperini M., Ligi M., Marani<br />
M. <strong>and</strong> Mele G., 1996, Tettonica dell'Adriatico meridionale. Mem. Soc. Geol. It., 51, 227-<br />
237.<br />
Ballauri A., Bega Z., Meehan P., Gambini R. <strong>and</strong> Klammer W., 2002, Exploring in<br />
structurally complex thrust belt: Southwest Albania Case. AAPG Hedberg Conference,<br />
May 14-18, 2002, Palermo-Mondello (Sicily, Italy).<br />
DeCelles P.G. <strong>and</strong> Giles K.A., 1996, Forel<strong>and</strong> basin systems. Basin Research 8, 105-123.<br />
Dominguez S., Malavieille J. <strong>and</strong> Lallem<strong>and</strong> S.E., 2000, Deformation of accretionary wedges<br />
in response to seamount subduction: insights from s<strong>and</strong>box experiments. Tectonics, 19,<br />
182-196.<br />
Goff D. <strong>and</strong> Wiltschko D.W., 1992, Stresses beneath a ramping thrust sheet. J. Struct. Geol.,<br />
14, 437-449.<br />
Lallem<strong>and</strong> S. <strong>and</strong> Le Pichon X., 1987, Coulomb wedge model applied to the subduction of<br />
seamounts in the Japan Trench. Geology, 15, 1065-1069.<br />
Macedo J. <strong>and</strong> Marshak S. (1999) Controls on the geometry of fold-thrust belt salients. Geol.<br />
Soc. Am. Bull., 111, 1808-1822.<br />
McCann W.R. <strong>and</strong> Habermann R.E., 1989, Morphologic <strong>and</strong> geologic effects of the<br />
subduction of bathymetric highs. PAGeoph., 129, 41-69.<br />
Nieuwl<strong>and</strong> D.A., Oudmayer B.C. <strong>and</strong> Valbona U., 2001, The tectonic development of<br />
Albania: explanation <strong>and</strong> prediction of structural styles. Marine <strong>and</strong> Petrol. Geol., 18, 161-<br />
177.<br />
Papa A., 1970, Conceptions nouvelles sur la structure des Albanides (presentation de la Carte<br />
tectonique de l’Albanie au 1/500 000). Bull. Soc. geol. de France, 12, 1096-1109.<br />
Price R.A., 1988, The mechanical paradox of large overthrusts. Geol. Soc. Am. Bull., 100,<br />
1898-1908.<br />
Robertson A. <strong>and</strong> Shallo M., 2000, Mesozoic-Tertiary tectonic evolution of Albania in its<br />
regional Eastern Mediterranean context. Tectonophys., 316, 197-254.<br />
Roure F., Nazaj S., Mushka K., Fili I., Cadet J.-P. <strong>and</strong> Bonneau M., 2004, Kinematic<br />
evolution <strong>and</strong> petroleum systems - an appraisal of the Outer Albanides. In: K.R. McClay,<br />
Thrust tectonics <strong>and</strong> hydrocarbon systems. AAPG Mem., 82, 474-493.<br />
Suppe J., Chou G.T. <strong>and</strong> Hook S.C., 1992, Rates of folding <strong>and</strong> faulting determined from<br />
growth strata. In: Thrust Tectonics, K.R. McClay (ed), Chapman <strong>and</strong> Hall, 105-121.<br />
Velaj T., Davison I., Serjani A. <strong>and</strong> Alsop I., 1999, Thrust tectonics <strong>and</strong> the role of evaporites<br />
in the Ionian Zone of the Albanides. AAPG Bull., 83, 1408-1425.<br />
6
Fig. 1: Isochron map (seconds, TWT) of base of the Southern Adriatic foredeep clastic<br />
succession. The foredeep basin is deeper on top of the Mesozoic pelagic basin (white;<br />
horizontal rules in outcrop) <strong>and</strong> becomes markedly shallower over the Mesozoic carbonate<br />
platform (brick pattern; outcrop shaded). The margin of the Mesozoic carbonate platform<br />
(ticked line) <strong>and</strong> the principal Neogene structures identified in the Southern Adriatic are<br />
shown. Note that the NNW-SSE folds in the centre of the southern Adriatic Sea affect only<br />
the clastic fill of the foredeep basin. The roughly E-W trending structures in the top left are<br />
due to forel<strong>and</strong> tectonics (Argnani et al., 1993). D Dumre diapir; V-E Vlore-Elbassan<br />
transversal line.<br />
Fig. 2: Profile ADS 02 crossing the northern <strong>and</strong> deepest portion of the Southern Adriatic<br />
foredeep basin. The reflector marking the base of the clastic foredeep sequence dips eastward<br />
down to 8 seconds (TWT). The upper part of the foredeep sedimentary fill is involved, near<br />
the Albanian coast, in a large scale backthrust.<br />
7
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
STRUCTURAL EVOLUTION of SOUTHERN ALBANIA THRUST BELT<br />
Dr Rol<strong>and</strong> BARBULLUSHI<br />
Baropex Ltd. rol<strong>and</strong>@baropex.co.uk<br />
The southern Albania thrust belt comprises Mesozoic-Eocene carbonate sequences<br />
incorporated into three major Tertiary thrust sheets verging towards the Apulia forel<strong>and</strong> in the<br />
southwest. The problem of the structural evolution has been previously approached through a<br />
hypothesis of orthogonal thin-skinned thrusting controlled by a differential areal extent of<br />
Permo-Triassic evaporites.<br />
This research uses the interpretation of several seismic profiles to address questions such as<br />
those relating to the subsurface geometric patterns of the thrust sheets, the kinematic<br />
framework the evaporites operated in, the role of the pre-existing faults <strong>and</strong> the timing of the<br />
evolution.<br />
The interpretation demonstrates that significant along-strike changes characterize the<br />
subsurface geometry of the thrust sheets. The Permo-Triassic evaporites facilitated their<br />
buttressing against a buffer zone in the Apulian forel<strong>and</strong> primarily within an orthogonal<br />
compressional regime. Regional clockwise rotation about a pivot point to the north may have<br />
provided a transpressional component along the thrusts. Pre-existing normal faults played a<br />
significant role in thrusting <strong>and</strong> accommodation of the strain partitioning. The main structural<br />
events included thin-skinned thrusting during Oligocene-Aquitanian, formation of a buffer<br />
zone in the forel<strong>and</strong> during the Burdigalian <strong>and</strong> subsequent thrust - buttressing during the<br />
Miocene. Post-Pliocene deformation occurs in the foredeep basin.<br />
9
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
STRUCTURAL <strong>and</strong> STRATIGRAPHICAL HISTORY of the OUTER ALBANIDES<br />
from<br />
RESTORED STRUCTURAL CROSS-SECTIONS,<br />
CHRONOSTRATIGRAPHIC CHART<br />
<strong>and</strong><br />
COUPLED KINEMATIC/STRATIGRAPHIC FORWARD MODELLING<br />
Laurie BARRIER 1 , Emily ALBOUY 2 , Sazan GURI 3 , Jean-Luc RUDKIEWICZ 2 , Spiro<br />
BONJAKES 3 , Kristaq MUSKA 3 <strong>and</strong> Rémi ESCHARD 2<br />
(1) Équipe de Tectonique et Mécanique de la Lithosphère, Institut de Physique du Globe de<br />
Paris (Institut associé au CNRS et à l’Université de Paris 7), 1 rue Jussieu, 75238 Paris<br />
Cedex 05, France<br />
Tel: +33.(0)1.83.95.76.08, Email: barrier@ipgp.fr<br />
(2) Département de Géologie-Géochimie, IFP Energies Nouvelles, 1 & 4 Avenue de Bois-<br />
Préau, 92852 Rueil-Malmaison Cedex, France<br />
(3) Polytechnic University, Tirana, Albania<br />
In orogenic systems, the relationships between deformation <strong>and</strong> sedimentation are essential<br />
keys to underst<strong>and</strong> the structure <strong>and</strong> evolution of fold <strong>and</strong> thrust belts <strong>and</strong> forel<strong>and</strong> basins.<br />
Joint structural <strong>and</strong> stratigraphic studies can therefore provide very interesting results. In this<br />
perspective, we used such a joint approach to bring new constraints on the structural,<br />
erosional <strong>and</strong> depositional events that occurred in the Outer Albanides during the Cenozoic.<br />
In their central part, the Outer Albanides show a typical fold-<strong>and</strong>-thrust belt where the syncompression<br />
sediments are very well preserved. First, two regional seismic sections were<br />
interpreted, balanced <strong>and</strong> unfolded to provide a structural picture of the study zone at different<br />
times during compression. A synthetic chronostratigraphic chart of Albanian syn-tectonic<br />
deposits was also drawn from field, well <strong>and</strong> seismic data. Based on the previous geological<br />
model, a coupled structural <strong>and</strong> stratigraphic forward modelling of the Outer Albanides was<br />
finally carried out using the Thrustpack <strong>and</strong> Dionisos softwares (© IFP).<br />
This coupled modelling allowed us to iteratively correct <strong>and</strong> refine the structural <strong>and</strong><br />
stratigraphic geometry <strong>and</strong> history of the study area interpreted from the surface <strong>and</strong><br />
subsurface data. The modelling also leads us to quantify the sedimentary transfers in this<br />
region in response to the thin- <strong>and</strong> thick-skin deformation into the fold-<strong>and</strong>-thrust belt.<br />
11
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
PLATFORM CARBONATE SUBTHRUSTS as MAJOR HYDROCARBON PLAYS in<br />
NW ALBANIA - MONTENEGRO REGION<br />
Zamir BEGA,<br />
OMV PETROM S.A., Romania<br />
e-mail: zamir.bega2@petrom.com<br />
Until to date, most of the industry exploration efforts in the NW Albania-Montenegro region<br />
(Fig. 1) have been focused either towards the thin-skinned thrust of Kruja-Dalmatian platform<br />
carbonate ramps or outboard of Kruja-Dalmatian thrust front, searching for pelagic thrusted<br />
ramps. Both approaches resulted unsuccessful despite abundant hydrocarbon shows in the<br />
area. All deep wells drilled outboard of Kruja thrust front have TD at Tertiary deposits, failing<br />
to reach the Mesozoic target.<br />
The new data gathered by international industry during 90’s provides new insights to the<br />
Mesozoic paleogeography <strong>and</strong> Mesozoic platform/basin morphology. Two major tectonic<br />
units, which differ only in deformation style can be deciphered in onshore-offshore Albania-<br />
Montenegro: the thick-skin deep seated platform to the west, partly inverted, as part of<br />
Apulian forel<strong>and</strong> eastward ramp, <strong>and</strong> a wide zone to the east, characterized by the known<br />
Kruja-Dalmatian thin-skinned ramps, running parallel to the coast line. JJ-3 well (offshore<br />
Montenegro) is the only well that have been reached the thick skinned platform carbonates.<br />
Delineation of the thick-skin platform margin towards the offshore-onshore Albania was<br />
carried out based on new 2D seismic lines acquired during 90’s (Fig. 2).<br />
The relationships between the thick-skinned platform carbonates <strong>and</strong> the thin-skinned ones<br />
are product of pre-orogeny architecture <strong>and</strong> also forel<strong>and</strong>-ward contraction. Due to massive<br />
westward overthrusting, the thin-skinned thrust belt has masked most of the deep seated paraauthochthonous<br />
platform carbonates. A SE-NW orientation anticlinorium trend of deep paraautochthonous<br />
platform carbonates is interpreted just north of Vlora-Diber Lineament (VDL).<br />
The anticlinorium, which is draping over pre-Mesozoic basement <strong>and</strong> stretched out for about<br />
140 km into onshore Montenegro, could hold several structural closures along strike. The<br />
thick-skinned structuration is mainly due to post-Oligocene inversion, coincident with post<br />
oligocene westward thrusting. The Kruja-Dalmatin thin-skinned ramps are draping over the<br />
anticlinorum <strong>and</strong> mimicking the underlying topography, in dip <strong>and</strong> strike orientation. Deep<br />
seated autochthonous platform carbonates in onshore western Albania region resemble the<br />
Southern Apennines plays in Italy, where more than 3 billion OOIP have been discovered so<br />
far from fractured carbonate reservoirs (Fig. 3).<br />
The exploration of the thin-skinned thrusts plays of the platform carbonates is considered of<br />
high risk mainly due to immature <strong>and</strong> insufficient Cretaceous SR to generate commercial HC<br />
in such levels <strong>and</strong> also of high risk on sealing capacities. The deeply buried Cretaceous SR,<br />
analogue to those contributed to Southern Appenines discoveries are modeled to generate the<br />
necessary amounts of light oils, trapped into fractured shallow water carbonates reservoirs <strong>and</strong><br />
sealed by Oligocene regional seal (Fig. 4). Two major deep rooted transversal faults in the<br />
area known in published literature as Scutari-Pec Lineament (SPL) <strong>and</strong> Vlora-Diber<br />
13
Lineament (VDL) contribute in post-orogeny shaping <strong>and</strong> could also help migration of HC<br />
generated from nearby intra-platform basins.<br />
Despite the fact that the regional platform architecture setting is less studied <strong>and</strong> understood<br />
than the fertile Ionian basin in the south <strong>and</strong> because of discouraging results over the years,<br />
the future petroleum exploration efforts in this region should be diverted more <strong>and</strong> more<br />
towards the platform sub-thrust plays.<br />
Fig. 1: General view of the NW Albania – Montenegro region. Despite abundant oil<br />
shows in the region no discovery has been achieved so far till now.<br />
Fig. 2: Simplified geo-tectonic map showing the morphology between South Adriatic<br />
Basin <strong>and</strong> the Kruja-Dalmatian platform zones (After OMV, 2000).<br />
14
Fig. 3: Source rocks distribution within the Mesozoic sequence (Modified after Zappatera,<br />
1994). Analogue source rocks of Cretaceous age proved in Southern Appenines are<br />
expected in the Study Area.<br />
Fig. 4: Simplified regional geological section from Southern Appenines (Italy) to Krasta Zone<br />
(Albania) showing that deep seated autochthonous platform carbonates in onshore<br />
western Albania region resemble the Southern Apennines plays in Italy (Modified after<br />
Picha, 1995).<br />
15
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
DIGITALIZATION of DATA RELATED to the AGE of ALBANIAN OPHIOLITES<br />
Ariana BEJLERI 1 *, Mensi PRELA 2 , Flutura HAFIZI 3<br />
1 Polytechnic University of Tirana, Faculty of Information Technology, Computer<br />
Engineering Department, Tirana, Albania, arianabejleri@yahoo.com.<br />
2 Polytechnic University of Tirana, Faculty of Geology <strong>and</strong> Mining, Earth Science<br />
Department, Tirana, Albania, mensiprela@yahoo.com<br />
3 Polytechnic University of Tirana, Faculty of Geology <strong>and</strong> Mining, Earth Science<br />
Department, Tirana, Albania, hflutura@yahoo.com<br />
* Ariana BEJLERI<br />
The age of Albanian Ophiolites has been determined by the age of siliceous sections, lying<br />
above them. The aim of this study is to digitalize the data provided by radiolarian<br />
assemblages yielded in this siliceous sections. Radiolaria are protozoic organisms with<br />
siliceous shell, abundant in the sedimentary rocks lying above the ophiolites all over the<br />
Tethys realm. The data for the Radiolarian Assemblages in Albania are taken from the Chert<br />
sections which belong to the siliceous sedimentary cover of the ophiolite of the Mirdita Zone<br />
<strong>and</strong> to the carbonate successions deposited on the continental margin of the ophiolites. These<br />
data are abundant <strong>and</strong> the way that this information is available in the existing format, is not<br />
convenient to be easily used. In order to resolve this problem we have developed a relational<br />
database by applying MS Access techniques which will facilitate the use of this data from<br />
different users. With this program we can provide the whole information when the section or<br />
the sample is known, by using different queries. The whole information has been presented in<br />
tabular form, with the tables interacting in a very harmonious <strong>and</strong> functional relationship with<br />
each other. The tables contain information about chert sections in which the radiolarian<br />
assemblages are taken: their location, position of samples in these sections, age, lithology,<br />
photos etc. The tables also contain a lot of information about the radiolarian assemblages in<br />
every sample: list of radiolarian species, age, author, species descriptions, photo etc. We can<br />
also edit all this information or enter new data according to them. This database will be used<br />
by geologists to better underst<strong>and</strong> the problems regarding the age of the beginning of siliceous<br />
sedimentation in different parts of Albanian Ophiolites, from north to south, from west to<br />
east.<br />
Key words: Radiolarian assemblages, Jurassic, chert, MS-ACCESS, database, section,<br />
species, biozonation.<br />
17
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
ANALYZING SEISMIC SITUATION in the DIBRA REGION by DIGITALIZATION<br />
of SEISMIC EVENTS<br />
Ariana BEJLERI 1 *, Flutura HAFIZI 2 , Shpresa SHUBLEKA 3<br />
1 Polytechnic University of Tirana, Faculty of Information Technology, Computer Engineering<br />
Department, Tirana, Albania, arianabejleri@yahoo.com.<br />
2<br />
Polytechnic University of Tirana, Faculty of Geology <strong>and</strong> Mining, Earth Science Department, Tirana,<br />
Albania,<br />
hflutura@yahoo.com<br />
3.<br />
Polytechnic University of Tirana, Faculty of Information Technology, Computer Engineering<br />
Department, Tirana, Albania,<br />
shubleka@yahoo.com<br />
* Ariana BEJLERI<br />
This study deals with the digitalization of the information on seismic sources in the Dibra<br />
region over a period of several years. By such a digitalization it is possible to present<br />
seismological activity in the studied region, which itself constitutes the key parameter of the<br />
seismic risk, which means that it is possible to identify the potential for eventual earthquakes<br />
in future. A great deal of analogue seismic information has been collected over years by the<br />
seismological network in Albania. The data show that the region has undergone several<br />
serious earthquakes. This is because the Dibra region is part of the strongly seismogenic zone<br />
of Korce-Oher-Peshkopi (Drini Alignment Zone). This is the reason why the study was<br />
undertaken in this region. The digitalization allows us to proceed in two main directions: first,<br />
to underst<strong>and</strong> the seismic activity for the region, <strong>and</strong>, second, to assist in evaluating the<br />
expectation of eventual future seismic activity in the region. This can be accomplished by<br />
developing a relational <strong>and</strong> integral database. One of the main function of this database will<br />
be data manipulation: coordinates, time of event, magnitude, intensity, depth of source etc.<br />
Several queries have been established based on these data upon the request of their users <strong>and</strong><br />
graphs have been also plotted, which can be updated at the moment of the data manipulation.<br />
Queries <strong>and</strong> graphs make possible to analyze the seismic situation in the Dibra region. This<br />
paper is also applicable in future research studies <strong>and</strong> is a good start, especially in precising<br />
the historical seismicity of our country.<br />
Key words: seismic situation, seismic events, Dibra region, digitalization, magnitude,<br />
intensity, depth of source<br />
19
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
HYDROCHEMICAL FEATURES of the KAVAJA GROUNDWATER BASIN<br />
(PREADRIATIC DEPRESSION, ALBANIA)<br />
(Poster)<br />
BEQIRAJ Arjan*, LUZATI Suada*, CENAMERI Majlinda*<br />
*Polytechnic University of Tirana, Faculty of geology <strong>and</strong> Mines ae_beqiraj@yahoo.com<br />
The basin of Kavaja is part of the Rrogozhina aquifer which spread out over the Albanian pre-<br />
Adriatic depression <strong>and</strong> extends from Shkodra in the north to Vlora in the south, over a surface of<br />
2100 km 2 (Eftimi, 1984). It is a multilayered aquifer consisting of intercalations between waterbearing<br />
Pliocene s<strong>and</strong>stone <strong>and</strong> conglomerate with impermeable clay layers. This aquifer occurs<br />
under typically artesian conditions because of its impermeable clay basement <strong>and</strong> semiimpermeable<br />
Quaternary cover. The main recharge source of the aquifer is represented by<br />
precipitations thanks to its vast (around 500 km 2 ) outcrop on the hilly terrains. Other recharge<br />
sources of the aquifer are the Quaternary alluvial aquifers on it, the rivers that intersect the<br />
aquifer transversally <strong>and</strong> the boundary aquifers. The groundwater shows variable geochemical<br />
composition due to different mineralogical composition of its medium, vast extension of the<br />
aquifer, variable geological <strong>and</strong> hydrogeological features, relationships with boundary aquifers<br />
<strong>and</strong> seawater, relations of the tested groundwater with respect to recharge <strong>and</strong> discharge zone <strong>and</strong><br />
possibly the depth of wells. However, the mainly magmatic – carbonatic mineralogical<br />
composition of the water – bearing s<strong>and</strong>stones <strong>and</strong> conglomerates has determined a geochemical<br />
composition of groundwater consisting mostly of HCO3-Mg-Ca hydrochemical groundwater<br />
type. Such a geochemical composition characterizes the groundwater of Rrogozhina aquifer as<br />
chemically immature groundwater (Apelo et al., 1996), which mainly plots near the center of the<br />
Piper plot. Dissolution of minerals seems to be the major geochemical processes in the formation<br />
of the groundwater composition. Other hydrochemical types are less important <strong>and</strong> are mainly<br />
related with the Na enrichment in water through cation exchange processes between groundwater<br />
<strong>and</strong> clay formations that are more abundant over the plain extension of the aquifer. The above<br />
mainly magmatic composition of s<strong>and</strong>stones <strong>and</strong> conglomerates is also responsable for the high<br />
content of iron in the grounwater of this aquifer. Iron content is higher in s<strong>and</strong>stone related<br />
groundwater where the silt fraction is mainly composed by iron-bearing minerals such as<br />
magnetite, epidote, granate, sphene, amphibole <strong>and</strong> pyroxene. In general, the wells are drilled<br />
down to 250m. The general mineralization <strong>and</strong> general hardness of groundwater pumped from<br />
the above drilled section range from 500 to 800 mg/l <strong>and</strong> from 11 to 25ºdH, respectively. At the<br />
pHs commonly encountered in groundwater (pH=7.0-8.5), HCO3 - is the dominant carbonate<br />
species present. In general, up to the above drilled depth, all the hydrochemical parameters of the<br />
groundwater fit the Albanian <strong>and</strong> EU limits for the potable water. In some cases, NH4 + , SO2, Cl - ,<br />
21
etc, are found in concentrations higher then the limits of drinking water. In the diagram (not<br />
shown) of Total Mineralization (TM) versus well depth (H) was found that groundwater can<br />
maintain TM values less that 1.0 mg/l up to a depth that ranges from 400 to 500m according to<br />
the well position with respect to recharge <strong>and</strong> discharge zone.<br />
The basin of Kavaja forms a syncline (Hyseni, 1995), whose axial part consists of water-bearing<br />
Astian conglomerates <strong>and</strong> s<strong>and</strong>stone covered by Quaternary alluvial sediments, whereas the<br />
Piacensian clay formations construct the western <strong>and</strong> eastern flanks of the syncline (Fig. 1).<br />
�<br />
Fig. 1: Geological map of the Kavaja basin<br />
The groundwater of the Kavaja basin belongs mostly to Ca-Mg_HCO3 hydrochemical type<br />
(Fig.2,3). The groundwater evolves gradually from HCO3 type to Cl type, from southeastern<br />
(Shkumbini river) towards northwestern (Adriatc sea) (Beqiraj et.al., 2007), that is from the<br />
recharge to discharge zone (Fig.4). On the other h<strong>and</strong>, the vertical evaluation of the groundwater<br />
geochemical composition towards the depth is expressed by means of the increase of the General<br />
Mineralization. Another trend of the geochemical groundwater composition, shown by gradual<br />
increase of the General Mineralization <strong>and</strong> Hardness (Fig. 5.a,b), is from both western <strong>and</strong><br />
eastern flanks of the Kavaja depression towards its central part. The horizontal evaluation of the<br />
22
hydrochemical parameters of the Kavaja groundwater fits very well with the variation of the<br />
hydraulic conductivity values of the Kavaja aquifer. Thus, the highest values of the General<br />
Mineralization <strong>and</strong> Hardness correspond to the lowest values of the hydraulic conductivity.<br />
23
�<br />
Fig.�3.�Map�of�the�groundwater�hydrochemical types��<br />
Fig.�2.�Kavaja groundwater�composition�<br />
(Piper�diagram)�<br />
Fig.�4.�Horizontal�variation�of�groundwater�composition<br />
Fig.�5.a.�Map�of�General�Mineralization Fig.�5.b.�Map�of�General�Hardness<br />
24<br />
�
�<br />
References�<br />
Appelo C.A.J. <strong>and</strong> Postma D. 1996. Geochemistry, Groundwater <strong>and</strong> Pollution. A.A. Balkema,<br />
Rotterdam, Netherl<strong>and</strong>s.<br />
Beqiraj A., Hyseni A., Leka Gj <strong>and</strong> Mata M. 2007. Geological-structural aspects of the<br />
Rrogozhina aquifer (Albanian pre-Adriatic depression), In: abstract book of the Workshop:<br />
Management of Geo=mining Resources – Kosovo, 2006. P. 57.<br />
Eftimi R. 1984. Permeability features of Rrogozhina suite. Buletini i Shkencave Gjeologjike. 3:<br />
57-73.<br />
Hyseni A. 1995. Structure <strong>and</strong> geodynamic evaluation of Pliocene molasses of pre-Adriatic<br />
depression. PhD Thesis. Polytechnic University of Tirana. 175p.<br />
Postma D. <strong>and</strong> Brockenhuus-Schack B.S. 1987. Diagenesis of iron in proglacial s<strong>and</strong> deposits of<br />
late- <strong>and</strong> post-Weichselian age.�J.�Sed.�Petrology�57:�1040�1053.�<br />
�<br />
�<br />
25
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
GROUNDWATER VULNERABILITY ASSESSMENT to CONTAMINATION<br />
(TIRANA - FUSHE KUQE BASIN, ALBANIA)<br />
(Poster)<br />
BEQIRAJ A. 1 , PROGNI F 1 <strong>and</strong> CENAMERI M. 1<br />
1) Polytechnic University of Tirana, Faculty of geology <strong>and</strong> Mines ae_beqiraj@yahoo.com<br />
Groundwater, that represents a major source of water for domestic, industrial <strong>and</strong> agricultural<br />
uses in Albania, is recently suffering a deterioration of its quality especially in the regions with<br />
extensive demographic <strong>and</strong> industrial development. Groundwater quality has been recently<br />
deteriorating particularly in the basin of Tirana which represents the most contaminated one<br />
because of the intensive urbanization <strong>and</strong> industrialization. Groundwater vulnerability<br />
assessment was done by using a DRASTIC model (Aller et al., 1987) combined with a<br />
Geographic Information System (Arc Gis 9.2 INFO). This model has been widely used in many<br />
countries because the inputs required for its application are generally available or easy to obtain.<br />
The aim of this study is to assess the vulnerability of groundwater to contamination for the basin<br />
of Tirana - Fushe Kuqe basin which represents the most important alluvial aquifer of Albania<br />
because of high dynamic reserves <strong>and</strong> high demographic density in this region (Fig. 1). The<br />
main recharge occurs from the south-eastern <strong>and</strong> eastern side of the basin <strong>and</strong> groundwater flows<br />
to the southeastern <strong>and</strong> eastern towards northwestern <strong>and</strong> western sides of the basin. The general<br />
groundwater mined from this aquifer is over 4000 l/s (Puca, 2005). From the hydrochemical<br />
point of view, the groundwater mostly belongs to calcium – magnesium – bicarbonate type.<br />
Materials <strong>and</strong> Methods<br />
The process for the construction of the vulnerability maps involved: (i) data (hydrogeological,<br />
geological <strong>and</strong> pedological) collection, (ii) scanning of toposheets <strong>and</strong> digitizing (raster to<br />
vector) source data, (iii) creating the attribute table, (iiii) analyzing the DRASTIC factors for<br />
evaluation of Drastic Index, (iiiii) rating these areas as to their vulnerability to contamination <strong>and</strong><br />
deriving a Graduated Map.<br />
The seven parameters (Depth to water (D), net Recharge (R), Aquifer media (A), Soil media (S),<br />
Topography (T), Impact on the vadose zone media (I), <strong>and</strong> hydraulic Conductivity of the aquifer<br />
(C)) that are involved in arriving at the Drastic Index have been collected from the following<br />
sources: Geological Survey of Albania, Institute of Soils <strong>and</strong> Institute of Topography for the<br />
Depth to water, Aquifer media, Hydraulic conductivity <strong>and</strong> Net recharge, Soil media, Impact of<br />
Vadose Zone <strong>and</strong> Topography, respectively.<br />
The value of Drastic Index (DR*DW +RR*RW + AR*AW + SR*SW + TR*TW + IR*IW +<br />
CR*CW) was calculated in Exel <strong>and</strong> was transferred to GIS 9.2 through Access.<br />
Results <strong>and</strong> discussion<br />
Different models can be applied to mapping of groundwater vulnerability, but the most<br />
commonly used model in assessing groundwater vulnerability in porous aquifers seems to be the<br />
DRASTIC model (Aller et al. 1985; Aller et al., 1987; Deichert <strong>and</strong> Hamlet, 1992,).<br />
27
The DRASTIC model has four assumptions (Aller et al. 1985; Aller et al., 1987): 1) the<br />
contaminant is present on the ground surface; 2) the contaminant is flushed into the groundwater<br />
by precipitation; 3) the contaminant has the mobility of water; 4) the area being evaluated by<br />
DRASTIC is 0.4 km 2 or larger. Higher DRASTIC index, represent a greater potential for<br />
pollution or a greater vulnerability of the aquifer to contamination.<br />
The final goal of vulnerability maps is the subdivision of the area into several hydrogeological<br />
units with different levels of vulnerability. As a result of the vulnerability assessment, 15% of the<br />
Tirana - Fushe Kuqe basin was classified as being very highly vulnerable, 10% highly<br />
vulnerable, 45% moderate, 15% low level <strong>and</strong>, finally, around 15% of the basin has very low<br />
vulnerability (Fig. 1.b). The configuration of the vulnerability to groundwater contamination fit<br />
very well with the data of the qualitative monitoring. This later has detected different levels of<br />
ammonium ions, nitrites, nitrates, phosphates, etc, in the groundwater of the southeastern sectors<br />
of the aquifer as it could be expected from the vulnerability map.<br />
References<br />
Aller, L., Bennett, T., Lehr, J.H., Petty, R.J., 1985, DRASTIC; A st<strong>and</strong>ardized system for<br />
evaluating groundwater pollution potential using hydrogeologic settings: Ada, OK, United<br />
States Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory,<br />
EPA/600/2-85/0108, 163 p.<br />
Aller L., Bennet T., Lehr J. H., Petty R. J. <strong>and</strong> Hackett G., 1987. DRASTIC; A st<strong>and</strong>ardized<br />
system for evaluating groundwater pollution potential using hydrogeologic settings: EPA-<br />
600/2- 87-035, 622 p.<br />
Deichert, L.A., Hamlet, J.M., 1992, Non-point groundwater pollution potential in Pennsylvania,<br />
in American Society of Agricultural Engineers (ASAE) <strong>International</strong> Winter Meeting,<br />
Nashville, Tennessee, 15-18 December, 1992: Paper No. 922531.<br />
Puca N., 2005. Scientific report: Monitoring of groundwater in the main aquifers of Albania-<br />
Erzeni – Ishmi aquifer. 45p. Archives of Geological Survey of Albania (in Albanian).<br />
���<br />
28
Legend<br />
Well<br />
Fig. 1: A) Hydrographic map of Tirana - Fushe Kuqe basin; B) Vulnerability map.<br />
29<br />
A<br />
B
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
USE of CAPILLARY PRESSURE to ASSESS the FLOW-UNITS in OIL-BEARING<br />
CARBONATE RESERVOIRS of the ALBANIAN IONIAN ZONE<br />
Brunilda BRUSHULLI <strong>and</strong> Gjergji FOTO**<br />
Knowledge of quality of oil <strong>and</strong> gas, is one of the most important tasks of the reservoir’s<br />
geology.<br />
The study of carbonate reservoirs in Albania, has suffered from lack of information stated<br />
directly from samples, geophysical surveys <strong>and</strong> equipment suitable for measuring the quality<br />
of reservoirs. The development of oil <strong>and</strong> gas reservoirs is managed by the direct information<br />
but also with a high cost.<br />
In this paper, is presented a way to obtain valuable information from measurements of<br />
capillary pressure of 450 samples obtained from wells.<br />
The�conclusions�from�this�analysis,�already�are�validated�with�all�the�data�of�development�of�<br />
the�reservoirs,�<strong>and</strong>�are�more�valid�for�all�types�of�fluids,�whereas�for�carbonate�reservoirs�<br />
are�favorable.�<br />
What is a flow unit? A flow unit is a sub division defined on the basis of similar pore type.<br />
Petrophysical characteristics such as distinctive log character <strong>and</strong>/or porosity-permeability<br />
relationships, define individual flow units. Inflow performance for a flow unit can be<br />
predicted from its inferred pore system properties, such as pore type <strong>and</strong> geometry. They help<br />
us to correlate <strong>and</strong> map containers <strong>and</strong> ultimately help predict reservoir performance. (Dan<br />
Hartmann, Edward Beaumont, 2001p 9-7).<br />
Capillary pressure measurements are the tool that sheds light on the exact structure of the<br />
pore system, pore threat size, pore volume, etc. <strong>and</strong> therefore the flow units within reservoirs.<br />
Considering tests of 450 capillary pressures measurements, were noted several shortcomings<br />
of measurement, distribution <strong>and</strong> use of their. (Gj. Foto etc, 2007; B. Brushulli, 2008):<br />
To use these tests, it has been necessary to make some concessions <strong>and</strong> modifications of the<br />
assessment methods that are evidenced in contemporary literature, being sure that not affect<br />
the outcome:<br />
1. To assess the pore throat size from capillary pressure measurements, lacks the<br />
interfacial tension <strong>and</strong> contact angles of oil, consequently are used literature values<br />
for the general case (Dan Hartmann, Edward Beaumont, 2001 );<br />
2. For determination of the Hg saturation, for each level of injected pressure, instead of<br />
the overall volume of porous permeable system, is used the volume of mercury at the<br />
higher injection pressure, 90 kg/cm 2 .<br />
** Faculty of Geology <strong>and</strong> Mine, Polytechnic University of Tirana, Albania; e-mail: gfoto2001@yahoo.com<br />
31
__________________________________________________________________________<br />
This last condition, excluded the possibility to evaluating water saturation <strong>and</strong> in this case,<br />
the curve of mercury saturation, vs. pore throat size <strong>and</strong> capillary pressure, meet the pressures<br />
axis on the 90 kg/cm 2 .<br />
Pore throat size when mercury saturation will be 35%, will result bigger, however, retained<br />
relativity regarding porous structure <strong>and</strong> pore volume by their throat size.<br />
From visual examination of these curves <strong>and</strong> comparison with the ones known in literature<br />
examples (Alden J. Martin, Stephen Solomon <strong>and</strong> Dan Hartmann, 1997) seems that they can<br />
be grouped into four types (Figure 1 <strong>and</strong> 2) :<br />
Presioni i injektimit,Pk(atm)<br />
Presioni i injektimit,Pk(atm)<br />
10 2<br />
10 1<br />
10 0<br />
4658 49 63<br />
10<br />
0 0.2 0.4 0.6 0.8 1<br />
-1<br />
10 2<br />
10 1<br />
10 0<br />
Tipi ' A '<br />
Tipi " B"<br />
73<br />
72<br />
10<br />
0 0.2 0.4 0.6 0.8 1<br />
-1<br />
Ngopshmëria me ujë,Su(%)<br />
TIPA TE LAKOREVE POROMETRIKE<br />
Apparently, the four types, have these features (Figure 2):<br />
0.1 �<br />
0.5 �<br />
2 �<br />
10 �<br />
0.1 �<br />
0.5 �<br />
2 �<br />
10 �<br />
10<br />
0 0.2 0.4 0.6 0.8 1<br />
-1<br />
** Faculty of Geology <strong>and</strong> Mine, Polytechnic University of Tirana, Albania; e-mail: gfoto2001@yahoo.com<br />
10 2<br />
10 1<br />
10 0<br />
10 2<br />
10 1<br />
10 0<br />
Tipi ' C'<br />
Tipi ' D'<br />
6061 50<br />
10<br />
0 0.2 0.4 0.6 0.8 1<br />
-1<br />
Ngopshmëria me ujë,Su(%)<br />
Meso Mikro Nano<br />
0.1 �<br />
0.5 �<br />
2 �<br />
Makro<br />
10 �<br />
Mega<br />
Mega Makro Meso Mikro Nano<br />
0.1 �<br />
0.5 �<br />
2 �<br />
6669 10 �<br />
Type A, has a porous structure of throat size from megaporte type (> 10 micron), which<br />
provides a saturation to over 80-100% of relative pore volume, with around 1atm injection<br />
pressures.<br />
Type B, has a porous structure of the throat size from megaporte (> 10 micron), which<br />
provides about 50% saturation of the relative pore volume, with 1 atm. injection pressures.<br />
Type C, has a porous structure of the throat size in order macroporte (20-10 micron), which<br />
provides a saturation of about 35% of relative volume pore, with about 1atm injection<br />
pressure.<br />
Type D, has a porous structure of the throat size in order macroporte (20-10 micron), which<br />
provides a saturation of about 5% of relative volume pore, with about 1atm injection<br />
pressure.<br />
In this group, we believe that absent a curve of a rock that is evidenced indirectly but that can<br />
not h<strong>and</strong>le with core <strong>and</strong> after Lucia's classification (1983), included at the type of touching<br />
vugs as fracture <strong>and</strong> breccias.<br />
32
__________________________________________________________________________<br />
Considering the distribution of curves types to specific reservoirs, result very interesting<br />
conclusions that are proved along many years performance of reservoirs. These data are<br />
presented in table 1.<br />
REZERVOIR T Y P E O F C U R V E S<br />
A B C D<br />
Ballsh 6.6% 12% 44% 37.35%<br />
Cakran-Mollaj 6% 14.7% 60.5% 18.30%<br />
Gorisht-Kocul 8% 21.3% 29.3% 41.3%<br />
Probabilityi per curve<br />
type<br />
6.85% 15.7% 48.3% 29.1%<br />
Probability 6.85% 22.55% 70.85% 99.95%<br />
Eng. Brunilda BRUSHULLI,<br />
September 2008<br />
The confrontation of these data with well logs, appropriate age <strong>and</strong> their depth in Gorishti-<br />
120 well, (figure 3), (Table no.2), prove at general point of view, a relative good accordance<br />
between lithology, age <strong>and</strong> type of capillary pressure curve, <strong>and</strong> a accordance with the<br />
conclusions of macroscopic studies of the samples taken from wells <strong>and</strong> superficial analogues<br />
(Gj. Foto, 1991). In literature, isn’t clearly stated <strong>and</strong> necessity of this accordance.<br />
Table no. 2<br />
Interval TG-G G-GF >GF<br />
Age Eocene Paleocene-Upper<br />
Cretaecous<br />
Lower Cretaecous<br />
Thickenis, m 175 251 >100<br />
Interval<br />
samples<br />
of 43 28 4<br />
Type of curves per interval<br />
Type Numbe % Type Numbe % Typ Numbe %<br />
r<br />
r<br />
e r<br />
A 1 2 A 5 18 A - -<br />
B 7 16 B 7 25 B 3 75<br />
C 16 38 C 2 7 C - -<br />
D 18 43 D 14 50 D 1 25<br />
** Faculty of Geology <strong>and</strong> Mine, Polytechnic University of Tirana, Albania; e-mail: gfoto2001@yahoo.com<br />
33
__________________________________________________________________________<br />
THELLESIA E BALLIT TE PUSIT NGA REPERI "G"<br />
THELLESIA<br />
80<br />
60<br />
40<br />
20<br />
0<br />
20<br />
40<br />
60<br />
80<br />
100<br />
120<br />
I<br />
II<br />
NENZONA<br />
III<br />
NUMRI I PUSEVE<br />
TE TESTUAR<br />
16 1 15 6,2593,75<br />
14<br />
12<br />
10<br />
1 1 3 7 ,1 4 92,86<br />
2 10 16,6 83.4<br />
4<br />
6 40 6 0<br />
6<br />
5<br />
1<br />
83 17<br />
10 9 1 9 0 1 0<br />
4<br />
R E Z U L T A T I I PROBABILITETI<br />
P E R V E T E S IM IT<br />
POZITIVE<br />
3<br />
1<br />
(+ ) (-)<br />
75 25<br />
4 3 1 75 25<br />
Figura 37 Sipas Gj. Foto 1991<br />
R E Z U L T A T E T E P E R V E T E S I M I T<br />
R E Z E R V U A R I I A M O N IC E S<br />
NEGATIVE<br />
2 2 0 100 0<br />
Testing results vs depth<br />
Eng. Brunilda BRUSHULLI,<br />
September 2008<br />
P R O B A B IL IT E T I I<br />
PERVETESIMIT POZITIV<br />
20 40 60 80 %<br />
Punoi: B. Brushulli<br />
These conclusions are in accordance with dynamic data of reservoir, <strong>and</strong> that are presented in<br />
the study of the distribution of positive tests of wells versus the depth in Amonica reservoir<br />
(Figure 4).<br />
Seems clearly a very good accordance of all data <strong>and</strong> qualitative evidence of flow units that<br />
can be effectively used for development of new reservoirs <strong>and</strong> their mapping in the Ionian<br />
Zone of Albania.<br />
References<br />
Alden J. Martin, Stephen Solomon <strong>and</strong> Dan Hartmann, 1997- Characterization of<br />
Petrophysical Flow Units in Carbonate Reservoirs; AAPG Bulletin, V. 81, No.5 (May<br />
1997), p.734-759.<br />
Dan Hartmann, Edward Beaumont, 2001- Predicting Reservoir System Quality <strong>and</strong><br />
Performance; in Exploring for Oil <strong>and</strong> Gas Traps, edited by E. Beaumont, N. Foster.<br />
F. Jerry Lucia, 1983- Petrophysical parameters estimated from visual description of<br />
carbonate rocks: a field classification of carbonate pore space: Journal of Petroleum<br />
Technology, March, v.35, p. 626-637.<br />
F. Jerry Lucia, 1995-Rock-Fabric/Petrophysical Classification of Carbonate Pore Space for<br />
Reservoir Characterization; AAPG Bulletin, V.79 (September 1995), p.1275-1300.<br />
Francois Roure, Shaqir Nazaj, Kristaq Muska, Ilia Fili, Jan.P. Cadet, M. Bonneau. 2003 -<br />
Kinematic Evolution <strong>and</strong> Petroleum System: An appraisal of the outer Albanides.<br />
Key Words: oil & gas; reservoir, flow unit, capillary pressure, pore & throat size<br />
** Faculty of Geology <strong>and</strong> Mine, Polytechnic University of Tirana, Albania; e-mail: gfoto2001@yahoo.com<br />
34<br />
55
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
IMPACT of SINGLE FAULTS on the FLUID FLOW <strong>and</strong> HEAT TRANSPORT:<br />
FIRST RESULTS from 3D FINITE ELEMENT SIMULATIONS<br />
Yvonne CHERUBINI a,b , Mauro CACACE a,b , Magdalena SCHECK-WENDEROTH a ,<br />
M<strong>and</strong>o Guido BLOCHER a,c , Björn LEWERENZ a<br />
a Helmholtz Centre Potsdam - GFZ German Research Centre for Geosciences, Telegrafenberg,<br />
D-14473 Potsdam, Germany (yvonne.cherubini@gfz-potsdam.de)<br />
b University of Potsdam, Am Neuen Palais 10, D-14469 Potsdam, Germany<br />
c Br<strong>and</strong>enburg University of Technology, Konrad-Wachsmann-Alle 1, D-03046 Cottbus,<br />
Germany<br />
Fractures <strong>and</strong> faults are likely to have a significant impact on the solute, fluid <strong>and</strong> heat<br />
transport in the subsurface. Depending on their hydraulic properties, faults can act either as<br />
preferential pathways or as barriers to fluid flow.<br />
To investigate the influence of faults on the hydrogeothermal field, simulations of the 3D<br />
coupled fluid <strong>and</strong> heat transport are carried out. Such models allow to quantify the effects of<br />
different fault geometries <strong>and</strong> physical rock properties on the temperature distribution.<br />
In general, it is a challenging task to represent the geometry of complex fault systems<br />
including dipping <strong>and</strong> intersecting fractures within a permeable matrix in a 3D numerical grid.<br />
Thereby, it is crucial first to underst<strong>and</strong> the impact of single faults on the fluid <strong>and</strong> heat<br />
transport before modelling more complex structural settings.<br />
These numerical models with simple fault geometries involve variations in fracture size,<br />
orientation, aperture <strong>and</strong> variable physical rock properties.<br />
The faults are numerically represented as 2D discrete surfaces within a 3D tetrahedral<br />
volume. For the Finite Element simulations we use the numerical simulator Open<br />
Geosys/Rockflow (Kolditz et al., 2003). Based on this approach, first results from modelling<br />
of simple fault systems in different geological settings are presented.<br />
References<br />
Kolditz, O., deJonge, J., Beinhorn, M., Xie, M., Kalbacher, T., Wang, W., Bauer, S.,<br />
McDermott, C., Kaiser, C.I., Kohlmeier, R., 2003. ROCKFLOW Theory <strong>and</strong> User<br />
Manual, release 3.9. Tech. rep., Groundwater Modeling Group, Center for Applied<br />
Geosciences, University of Tübingen & Institute of Fluid Mechanics, University of<br />
Hannover.<br />
35
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
AIMS <strong>and</strong> PERSPECTIVES of ILP <strong>and</strong> TOPO-EUROPE<br />
Pr. Dr. Sierd CLOETINGH, VU-Amsterdam<br />
sierd.cloetingh@falw.vu.nl<br />
ILP st<strong>and</strong>s for Integrated Solid Earth Sciences in its broadest sense.<br />
The lithosphere is THE connection between deep Earth <strong>and</strong> surface processes. Lithospheric<br />
studies, therefore, are a natural bridge between, for example, geophysics, geology <strong>and</strong><br />
geomorphology. The study of the lithosphere deals with fundamental aspects of system Earth,<br />
<strong>and</strong> how the underlying processes operate. At the same time, lithospheric research holds the<br />
key for a better underst<strong>and</strong>ing of the controls on the occurrence of natural resources <strong>and</strong><br />
environmental hazards. Sedimentary basins, being the site of mankind largest energy <strong>and</strong><br />
fresh water resources, are, by their nature, an extremely effective interface between Academia<br />
<strong>and</strong> Industry. Quantitative modelling has made important progress during the last decade. At<br />
the same time, it is vital to constrain <strong>and</strong> test these models trough an array of high quality<br />
geological <strong>and</strong> geophysical data sets.<br />
ILP has initiated a large number of task forces <strong>and</strong> regional coordinating committees to<br />
facilitate the dialogue <strong>and</strong> exchange of information needed for further progress in integrated<br />
Solid Earth Sciences. The Task Force on Sedimentary Basins is a flagship of ILP. The<br />
regional coordinating committee TOPO-EUROPE is exemplary for this integrated Solid Earth<br />
approach at the scale of a continent <strong>and</strong> its margins, linking for instance sediment source-sink<br />
dynamics.<br />
Continental topography is at the interface of deep Earth, surface <strong>and</strong> atmospheric processes.<br />
Topography influences society, not only as a result of slow l<strong>and</strong>scape changes but also in<br />
terms of how it impacts on geohazards <strong>and</strong> the environment. When sea-, lake- or groundwater<br />
levels rise, or l<strong>and</strong> subsides, the risk of flooding increases, directly affecting the<br />
sustainability of local ecosystems <strong>and</strong> human habitats. On the other h<strong>and</strong>, declining water<br />
levels <strong>and</strong> uplifting l<strong>and</strong> may lead to higher risk of erosion <strong>and</strong> desertification. In the recent<br />
past, catastrophic l<strong>and</strong>slides <strong>and</strong> rock falls have caused heavy damage <strong>and</strong> numerous fatalities<br />
in Europe. Rapid population growth in river basins, coastal lowl<strong>and</strong>s <strong>and</strong> mountainous regions<br />
<strong>and</strong> global warming, associated with increasingly frequent exceptional weather events, are<br />
likely to exacerbate the risk of flooding <strong>and</strong> devastating rock failures. Along active<br />
deformation zones, earthquakes <strong>and</strong> volcanic eruptions cause short-term <strong>and</strong> localized<br />
topography changes. These changes may present additional hazards, but at the same time<br />
permit, to quantify stress <strong>and</strong> strain accumulation, a key control for seismic <strong>and</strong> volcanic<br />
hazard assessment. Although natural processes <strong>and</strong> human activities cause geohazards <strong>and</strong><br />
environmental changes, the relative contribution of the respective components is still poorly<br />
understood. That topography influences climate is known since the beginning of civilization,<br />
but it is only recently that we are able to model its effects in regions where good (paleo-)<br />
topographic <strong>and</strong> climatologic data are available.<br />
37
TOPO-EUROPE addresses the 4-D topographic evolution of the orogens <strong>and</strong> intra-plate<br />
regions of Europe through a multidisciplinary approach linking geology, geophysics, geodesy<br />
<strong>and</strong> geotechnology. TOPO-EUROPE integrates monitoring, imaging, reconstruction <strong>and</strong><br />
modelling of the interplay between processes controlling continental topography <strong>and</strong> related<br />
natural hazards. Until now, research on neotectonics <strong>and</strong> related topography development of<br />
orogens <strong>and</strong> intra-plate regions has received little attention. TOPO-EUROPE initiates a<br />
number of novel studies on the quantification of rates of vertical motions, related tectonically<br />
controlled river evolution <strong>and</strong> l<strong>and</strong> subsidence in carefully selected natural laboratories in<br />
Europe. From orogen through platform to continental margin, these natural laboratories<br />
include the Alps/Carpathians-Pannonian Basin System, the West <strong>and</strong> Central European<br />
Platform, the Apennines-Aegean-Anatolian region, the Iberian Peninsula, the Sc<strong>and</strong>inavian<br />
Continental Margin, the East-European Platform, <strong>and</strong> the Caucasus-Levant area. TOPO-<br />
EUROPE integrates European research facilities <strong>and</strong> know-how essential to advance the<br />
underst<strong>and</strong>ing of the role of topography in Environmental Earth System Dynamics. The<br />
principal objective of the network is twofold. Namely, to integrate national research programs<br />
into a common European network <strong>and</strong>, furthermore, to integrate activities among TOPO-<br />
EUROPE institutes <strong>and</strong> participants. Key objectives are to provide an interdisciplinary forum<br />
to share knowledge <strong>and</strong> information in the field of the neotectonic <strong>and</strong> topographic evolution<br />
of Europe, to promote <strong>and</strong> encourage multidisciplinary research on a truly European scale, to<br />
increase mobility of scientists <strong>and</strong> to train young scientists.<br />
References<br />
Cloetingh S. <strong>and</strong> Negendank, J. (Eds.), 2010. New Frontiers in Integrated Solid Earth Sciences.<br />
Springer Verlag, p.1-412.<br />
Cloetingh S., Thybo H., Faccenna C. (Eds.), 2009. TOPO-EUROPE: The Geoscience of<br />
coupled Deep Earth-surface processes. Tectonophysics, Special issue, v. 474, p. 1-416.<br />
Cloetingh S., Ziegler P., Bogaard P., Andriessen P., Artemieva I., Bada G., Balen van R.,<br />
Beekman F., Ben-Avraham Z., Brun J.-P., Bunge H.-P., Burov E., Crabonell R., Facenna<br />
C., Friedrich A., Gallart C., Green A., Heidbach O., Jones A., Matenco L., Mosar J.,<br />
Oncken O., Pascal C., Peters G., Sliaupa S., Soesoo A., Spakman W., Stephenson R.,<br />
Thybo H., Torsvik T., Vicente de G., Wenzel F. <strong>and</strong> Wortel M., 2007. TOPO-EUROPE:<br />
The geoscience of coupled deep Earth-surface processes. Global <strong>and</strong> Planetary Change,<br />
v. 58, p. 1-118.<br />
Lacombe O., Lavé O., Roure F. <strong>and</strong> Vergés J., eds, 2007. Thrust belts <strong>and</strong> forel<strong>and</strong> basins:<br />
From fold kinematics to hydrocarbon systems. Frontiers in Earth Sciences, Springer,<br />
492 pp.<br />
Roure F., Cloetingh S., Scheck-Wenderoth M., Ziegler, P.A., 2010. Achievements <strong>and</strong><br />
challenges in sedimentary basin dynamics: A review. In: New Frontiers in Integrated<br />
Solid Earth Sciences (Ed. by S. Cloetingh <strong>and</strong> J. Negendank). Springer-Verlag, p. 145-<br />
233.<br />
Scheck-Wenderoth M., Bayer U. <strong>and</strong> Roure F., guest editors, 2008. Progress in underst<strong>and</strong>ing<br />
sedimentary basins. ILP Task Force, Special issue of Tectonophysics.<br />
38
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
A CASE STUDY on PROBALISTIC EVALUATION<br />
of SOIL LIQUEFACTION<br />
Shkëlqim DAJA, Polytechnic University of Tirana, Faculty of Geology <strong>and</strong> Mining, Albania,<br />
daja_s@yahoo.com<br />
Neritan SHKODRANI, Polytechnic University of Tirana, Faculty of Civil Engineering, Albania,<br />
neritans@yahoo.com<br />
In this paper the liquefaction potential of Quaternary soft non-cohesive soils has been assessed.<br />
Generally, liquefaction will occur in loose clean to silty s<strong>and</strong>s that are below the groundwater<br />
table, of Holocene age situated in a maximum depth of 20 m below the ground surface. This<br />
assessment is based on the engineering characteristics of the seismic hazard expressed in terms<br />
of Peak Ground Acceleration at the bedrock <strong>and</strong> 5% Damped Elastic Response Spectra for rock<br />
<strong>and</strong> soil conditions. The approach followed for the analysis is the probabilistic one, which means<br />
that engineering characteristics of the shaking are estimated for a certain probability of<br />
occurring. The liquefaction vulnerability has been computed considering the hazard level<br />
corresponding to different levels of safety, such as 10% in 10 years (72-years Return Period),<br />
10% in 50 years (475-years RP) <strong>and</strong> 2% in 50 years (2475-years RP). The seismological data<br />
used in the analyses contains earthquakes with MS 4.5 <strong>and</strong> covers a time span from 58 up to<br />
2009. The calculation of cyclic resistance ratio (CRR) <strong>and</strong> the cyclic stress ratio (CSR) of the<br />
soils are based on SPT (St<strong>and</strong>ard Penetration Test) values.<br />
Keywords<br />
Liquefaction evaluation, probability, earthquake, cyclic resistance ratio, cyclic stress ratio,<br />
safety factor.<br />
References<br />
1. Riga G., 2008. “Microzonazione sismica: Procedure per elaborare una carta di<br />
pericolosità sismica”, 268.<br />
2. Seed, H. B., Tokimatsu, K. Harder, L. F., <strong>and</strong> Chung, R. M., 1985. Influence of SPT<br />
procedures in soil liquefaction resistance evaluation. Journal of Geotechnical Engineering,<br />
ASCE, 111 (12), 1425-1445.<br />
3. Sulstarova E., Kociu S., Muco B., <strong>and</strong> Peci B., 2005. Catalogue of Earthquake in Albania<br />
with MS � 4.5 for the period 58-2004. Internal Report, Seismological Institute, Tirana.<br />
4. Takada T., 2006. H<strong>and</strong> Calculations of Seismic hazard Curve. Lecture notes, University<br />
of GRIPS, Japan.<br />
5. Aliaj SH., Adams J., Halchuck S., Sulstarova E., Peci V., <strong>and</strong> Muco B., 2004.<br />
Probabilistic Seismic Hazard maps for Albania. 13 th World Conference on Earthquake<br />
Engineering Vancouver, B.C., Canada, 13.<br />
6. Kramer S., 1996. Geotechnical Earthquake Engineering. Prentice Hall, New Jersey, 653.<br />
39
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
The ROLE of GEOLOGICAL FACTOR in the CHEMICAL CONTENT of the<br />
QUATERNARY GRAVEL AQUIFERS of the PREADRIATIC DEPRESSION<br />
(Poster)<br />
Dr. Elsa DINDI<br />
Geology <strong>and</strong> Mining Faculty<br />
Department of Geoinformatics, Applied Geology <strong>and</strong> Environment<br />
E-mail: edindi@yahoo.com<br />
In natural conditions, chemical composition of underground waters is consequence of<br />
many factors of physical, chemical, biological, geographical, geological, hydrogeological<br />
<strong>and</strong> anthropogenic nature.<br />
In determined conditions one of this factors takes the main importance, the others give<br />
their influence indirectly. Geological factor influences in to directions: lithological <strong>and</strong><br />
tectonically ones.<br />
Considering in this way, the lithological factor plays the direct role <strong>and</strong> tectonic plays the<br />
indirect one.<br />
The role of lithological factor, in Preadriatic Depression gravel Quaternary aquifers, has<br />
conditioned some common characteristics related to mineralogical composition of the<br />
gravel which is reflected to the chemical composition of the ground waters.<br />
The role of tectonics has conditioned indirectly the physical, hydrogeological <strong>and</strong><br />
hydrodynamic features of these aquifers, witch in their own part plays role in spatial<br />
evolution of chemical composition of underground waters.<br />
Tectonic factors have conditioned some common features for gravel quaternary aquifer of<br />
Mati River, Tirane-Ishem-Erzeni aquifer <strong>and</strong> Vjosa River aquifer. Gravel quaternary<br />
aquifer of Lushnja represents different features comparing to mentioned aquifers.<br />
Tectonics has conditioned the spatial extension of these aquifers representing some<br />
common characteristics, such as:<br />
� Increasing of top cover clay from eastern to the western part of the aquifers.<br />
� Increasing the content of s<strong>and</strong> comparing to gravel, toward the west, influencing<br />
directly on the hydrogeological parameters of the aquifers.<br />
� Increasing the thickness of the aquifers toward the west.<br />
� The movement of ground waters is from Southeast to Northwest (except Lushnja<br />
gravel aquifer, where this direction is from North to South, <strong>and</strong> from East <strong>and</strong> West to the<br />
Center).<br />
� Spatial changes in chemical composition of ground waters.<br />
Closed to the recharge areas ground water belongs to HCO3 type, influenced by the<br />
chemical composition of river waters. Changes take place toward the west: increase TDS,<br />
ion HCO3 decreases, ion Cl increases etc...<br />
41
This common or different characteristics of Preadriatic Depression gravel Quaternary<br />
aquifers are presented in hydrogeochemical maps <strong>and</strong> cross sections.<br />
Keywords: aquifer, tectonics, ground water chemical composition, Preadriatic<br />
Depression.<br />
References<br />
Aliaj Sh., 1998. Neotectonic structure of Albania. The Albanian Journal of Natural &<br />
Technical Sciences, No. 4.<br />
Aliaj Sh., 2000. Map of the active faults in Albania, at scale 1:200 000. Seismological<br />
Institute, Academy of Sciences, Tirana.<br />
Babameto A., 1978. Hydrogeology of Fushe Kuqe well field snd the possibility of Durres<br />
city supply,(in Albanian)Albanian Hydrogeological Survey, Report Tirana.<br />
Dindi E., 2009. “Some considerations on the water quality of the aquifer on the down<br />
stream of Erzeni River valley”, “Buletini i Shkencave Teknike”.<br />
Dindi E., 2009. Phd thesis “Management <strong>and</strong> sustainable exploitation of ground water<br />
recourses of Vlora area”. Faculty of Geology <strong>and</strong> Mining, UPT.<br />
-Eftimi, R.<br />
“Ujra nentokesore te zones se Lushnjes”: permbledhje studimesh (Groundwater of the<br />
Lushnja area: summaries of studies (in Albanian).<br />
Albanian Hydrogeological Survey, Tirana, 1975, Albania<br />
-Eftimi, R.<br />
Karakteristikat filtruese dhe aspekte gjeologjike të shtresave ujëmbajtëse ne Shqipëri<br />
(Filtration characteristics <strong>and</strong> geological aspects of the aquifers in Albania, in Albanian).<br />
Albanian Hydrogeological Survey, Tirana, 1982, Albania<br />
- Eftimi, R., Tafilaj I. (1996)<br />
Groundwater of Erzeni-Ishmi Rivers basin. In water resources management of Erzeni-<br />
Ishmi Rivers basin.<br />
Priority action programme. Regional activity center, Split, Kroacia. Word Bank.<br />
-Fetter C.W.<br />
Applied Hydrogeology, third edition, New Jersey,07458.<br />
-Group of authors<br />
Geological map of Albania, at scale: 1:200.000, Tirana, 2004.<br />
-Group of authors,<br />
Albanian Hydrogeological Survey<br />
Hydrogeological Map of Albania. at scale: 1:200.000, Tirana 1985, Albania<br />
-Strazimiri, D.L. <strong>and</strong> Motz, L.H.(1997)<br />
Groundwater flow model of the northern part of the Lushnja aquifer in Albania.<br />
Hydrological Sciences Journal, 42: 5, 679-69<br />
-Tafilaj I., Dindi E., Saraci M.(2000-2002)<br />
“Management of territory <strong>and</strong> natural resources on the area Tirane-Durres-Kavaje (in<br />
Albanian).<br />
Albanian Hydrogeological Survey. Sub. Project 1.1. “Groundwater resources”.<br />
42
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SEQUENCE STRATIGRAPHIC of DEEP-WATER SERRAVALLIAN<br />
SILICICLASTICS of the ZVERNECI OUTCROP - VLORA REGION-ALBANIA<br />
Prof. Dr. Çerçis DURMISHI<br />
Polytechnic University of Tirana, cecodurmishi@yahoo.com<br />
Despite the numerous studies carried out around the world in the last 30 years on both modern<br />
<strong>and</strong> ancient deep water siliciclastic systems, the level of knowledge is continually evolving.<br />
A wide variety of siliciclastic systems are found in modern <strong>and</strong> ancient basins <strong>and</strong> their differing<br />
characteristics of sedimentation <strong>and</strong> the complex interplay of such factors as paleogeography,<br />
paleo-topography, bathymetry, catastrophic events, regional basin development <strong>and</strong> sedimentary<br />
sources have still not been adequately explained. Neither the sedimentological fan model<br />
(Normark,1970; Mutti <strong>and</strong> Ricci Lucchi,1972; Walker,1978), nor the “eustatic” sequencestratigraphic<br />
model (Posamentier et. al,1991) adequately describe the great variety of deep-water<br />
siliciclastic systems.<br />
The sedimentary model proposed for the Serravalian of this region is a “hybrid” deep water<br />
siliciclastic system. This “hybrid” model contains elements of both classical <strong>and</strong> modern systems<br />
which have been proposed by various authors. It also presents some unique characteristics which<br />
are observed in both the vertical <strong>and</strong> horizontal directions.<br />
Recent studies concerning the sedimentology of other regions of molasse deposits within the<br />
peri-Adriatic Depression of Albania are expected to complement the model proposed in this<br />
study.<br />
The description of this model will contribute to the underst<strong>and</strong>ing of the deep water sediments<br />
within the basin <strong>and</strong> will form the basis for a detailed petroleum exploration model.<br />
The Serravalian deposits in the Zverneci outcrops are part of a foredeep basin in the most<br />
southern margin of the molassic Periadriatic Depression of the South Adriatic region.<br />
These sediments are characterized by three major depositional sequences:<br />
Sequence I- Slope deposits.<br />
Sequence II- Middle-fan, fan complex deposits.<br />
Sequence III- Slope deposits.<br />
Total sediment thickness is more than 1800m.<br />
A pre-dominantly NW-SE(AZ 340 grade) trend for the sediment source direction has<br />
been established. Three possible source areas (Tragjas-Dukat, Bolene-Terbac, <strong>and</strong> the<br />
Sevasteri area) are interpreted to have contributed sediments to deposition in the Zverneci<br />
area.<br />
The depositional environment is characterized by lowst<strong>and</strong> deep-water siliciclastic<br />
systems of turbidite facies.Fan Complexes, supra fan lobes <strong>and</strong> slope sediments are seen.<br />
The main turbidite elements are fan complexes consisting of channels, channel-lobe<br />
transitions, fan lobes, channel-margins <strong>and</strong> overbank facies.<br />
43
The gross lithologies observed are s<strong>and</strong>stones, siltstones, turbiditic shales <strong>and</strong><br />
hemipelagic marls.<br />
S<strong>and</strong>stone reservoirs: channels, lobes <strong>and</strong> channel-lobe complexes display reservoir<br />
quality with 25%-30% porosity. The s<strong>and</strong>s, mainly quartzitic-feldspathic in character,<br />
have thicknesses varying from 0.5m-10m.<br />
Four main facies types can be distinguished within the Zverneci outcrop section:<br />
Facies A- Massive turbidite s<strong>and</strong>stones(thickness 0.5m-10m).<br />
Facies B- Thin-bedded turbidites (thickness 0.5 m- 15 m)<br />
Facies C- Turbiditic shales (thickness 0.5 m – 6 m)<br />
Facies D- Hemipelagic marls ( thickness 0.2 m- 20 cm)<br />
Both high-density turbidity current (HDTC) <strong>and</strong> low-density turbidity current (LDTC)<br />
transportation mechanisms are present in the area.<br />
44
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SPECTACULAR EVIDENCE of SEDIMENTARY STRUCTURES of the SERRAVALIAN<br />
DEPOSITS in the ZVERNECI OUTCROPS (ALBANIA)<br />
�<br />
Prof. Dr. Çerçis DURMISHI, Polytechnic University of Tirana, Albania, cecodurmishi@yahoo.com<br />
Dr. Shkëlqim DAJA, University Polytechnic of Tirana, Albania,daja_s@yahoo.com<br />
Keywords: Serravalian deposits, turbidity environment, Sedimentary structures: flute casts, groove<br />
casts, prod casts, bounce casts, tool casts, Load casts, Flame structures, Rip-up clasts, Biogenic<br />
Structures/Trace Fossils.<br />
The Serravalian deposits in the Zverneci outcrops are part of foredeep basin in the most southern<br />
margin of the molassic Periadriatic Depression of South Adriatic region.<br />
Sedimentary structures observed in the Zverneci outcrop have been classified in 6 groups:<br />
A. Paleocurrent Indicators<br />
A.1. Bedding top structures:<br />
Directional sedimentary structures on the s<strong>and</strong>stone beds on the Zverneci outcrop are mainly symmetric<br />
<strong>and</strong> asymmetric ripple marks. The ripple marks are present on the top of each s<strong>and</strong>stone bed. Their<br />
spectacular presence has caused many geologists to doubt the turbidity environment of the<br />
sedimentation of these deposits. One possible explanation is that their presence on the top of every<br />
s<strong>and</strong>stone bed is a result of the current waves which are always created after every turbidity pulse moves<br />
the mass of sediment into the basin. In this case these current waves are almost perpendicular with the<br />
direction of the turbidity pulsations, (see: Direction of paleocurrent).<br />
A.2. Base bedding structures.<br />
Bed floor directional groups are present on the Zverneci outcrop. The well preserved <strong>and</strong> pervasive<br />
nature of these features has facilitated the compilation of a comprehensive database of paleocurrent<br />
measurements. These groups are present along the axis at the base of each depositing fan. Most common<br />
are: flute casts, groove casts, prod casts, bounce casts, tool casts;<br />
Flute cast: There is a presence of large <strong>and</strong> small flute casts; composite corkscrew flute cast <strong>and</strong><br />
elongate flute cast. The flute casts of the elongate <strong>and</strong> flat type may be observed at the upstream end of<br />
the deposition, whereas the corkscrew type forms downstream:<br />
coalescent flute casts<br />
the composite flute cast is formed by the linear grouping of overlying elements the elongate flute cast is<br />
pointed upstream note the presence of the flat flute cast with a conical upstream termination note the<br />
spiraled flute cast triangular flute casts are arranged in line <strong>and</strong> superposed arched lute cast sharp<br />
upstream extremity. It may be assumed that the rectilinear upstream sections corresponds to hollowing<br />
out by a more or less linear current whereas the raised section represents an eddy area from which the<br />
current diverges<br />
Groove cast: Note that it is serrated lengthwise <strong>and</strong> appears on the inner surface of a sequence<br />
commencing with s<strong>and</strong>s b. Also note the fine linear groove casts.<br />
Tool casts a large number of tool casts.<br />
B. Deformation structures<br />
Deformation structures are common in outcrop. These structures are found mainly on the base of thick<br />
s<strong>and</strong>stone sequences but also inside massive s<strong>and</strong>stones.<br />
Load casts: A load cast cutting shows general graded-bedding with a rather clear break in granulometry<br />
between the proper fill <strong>and</strong> the load casts <strong>and</strong> the sequence body: globular, mushroom-shaped load cast<br />
well-marked, large globular load casts load structures at the base of the fan deposits (channel <strong>and</strong> lobe)<br />
45
Flame structure:. Flame shaped structures are prevalent on the Zvemeci outcrop. There are large <strong>and</strong><br />
small flame structures. These structures are formed during (penecontemporaneously) sedimentation<br />
<strong>and</strong> are closely related to the convolute structures. These are the result of the fluid escape under the<br />
pressure created by the weight of overlying sediments.<br />
C. Forced sedimentary structures.<br />
Two types of "forced" structures have been observed:<br />
a. - "moving force"<br />
b.-" circled force"<br />
These features are created when turbidity pulses encounter natural barriers within the basin which serve to<br />
deflect the flow of sediment thus creating 'circular' geometries.<br />
D. Rip-up clasts<br />
Rip-up clasts are a dominant feature of the Zvemeci outcrop. Their occurrence at the base of or within<br />
the s<strong>and</strong>stone units is a meaningful indicator of the following sedimentologic processes: the high<br />
energy of the depositional pulses: the high degree of erosion of the underlying sediments (mainly clay<br />
facies), the density of turbidity pulses, the shale clasts are products of intrabasinal erosion, shale clasts<br />
may have a negative impact on reservoir quality.<br />
E. Biogenic Structures/Trace Fossils<br />
Trace fossils are found in the upper part of the sequence within thin <strong>and</strong> rhythmic s<strong>and</strong>stone beds<br />
deposited under lower energy conditions. The specific ichnofacies observed are listed below:<br />
Zoophvcos <strong>and</strong> Nereites Typical fossil trace<br />
Zoophycos ichnofacies:<br />
(bathyal zone) Zoophycos<br />
Nereites ichnofacies: Helminthoida<br />
(Abyssal zone) Cosmorhaphe<br />
Taphrhelminothpsis.<br />
F. Concretions<br />
S<strong>and</strong>stone concretions are present on different levels within the sequences. The detailed observations<br />
reveal that the nuclei of these concretions are comprised of marls of Burdigalian age. This suggests<br />
movement of turbidity currents along the top of Burdigalian marls as an initial erosional 'pulse'.<br />
REFERENCES<br />
DURMISHI.Ç. et.al.,1993. Manuali I Sedimentologjise: Figurat dhe gjeometria e trupave sedimentare<br />
copezore te ultesires Pranadriatike. 100 faqe, Botimi i Projektit TEMPUS, ORSAY-PARIS<br />
(Fond i Seksionit te Petrologjise dhe Sedimentologjise).<br />
DURMISHI.Ç., 1994. Albania. study: the sedimentation environment of Plio-Miocene deposits of<br />
Periadriatic Depression. Fondi; O.M.V. (Albanien) Exploration Ges. m.b.H. Tirana.<br />
DURMISHI.Ç., 1995. Turbidite environment of Plio-Miocene deposits of the Periadriatic Depression<br />
(Albania. Poster, Kongresi i 5-te i Sedimentologeve Franceze dhe Mitingu i 16-te i<br />
Sedimentologeve Europiane, Aix-lesBains-France.<br />
DURMISHI.Ç., 1997. Sequence stratigraphy <strong>and</strong> reservoir characterization of deep-water Serrevalian<br />
silicoclastics of the Vlora Region-Albania. O.M.V. (Albaniea) exploration Ges.m.b.H. Tirana.<br />
DURMISHI.Ç, MELO V. et.al., 1999-2001. Identifikimi dhe vleresimi i potencialeve unikale te<br />
gjeotrashegimnise dhe menaxhimi i vlerave te tyre gjeoturistike. Lokale, Kombetare dhe<br />
Nderkombetare te Shqiperise. Programi Kombetar i Zhvillimit,MASH,Tirane.<br />
MEÇO S, STRAUCH.F., DURMISHI.Ç. et.al.., 2004. Die Molassen der jungen Faltrengebirge<br />
Albaniens.Munstrsche Forschungen zur Geologie und Palaontologie.Heft 99.<br />
46
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
KINK BANDS <strong>and</strong> CHEVRON FOLDS CHARACTERISTICS of the SARANDA ANTICLINE:<br />
ESTIMATION of the "GEOLOGIST's MOSAIC", SOUTH-WESTERN ALBANIA<br />
Prof. Dr. Çerçis DURMISHI, Polytechnic of Tirana, Albania, cecodurmishi@yahoo.com<br />
Prof. Vangjel MELO, Polytechnic of Tirana, Albania<br />
Ing. Ervin LULA, Isl<strong>and</strong> <strong>International</strong> Exploration BV-Albania. elula@isl<strong>and</strong>oil<strong>and</strong>gas.com<br />
Observations of events leading to development of kink b<strong>and</strong>s, their origin, <strong>and</strong> changes in their<br />
morphology are recorded during the deformation in the "Geologist's mosaic" 1 ' in southern Albania.<br />
Kinking in natural deformed limestone strata has been investigated to determinate the complete history,<br />
of this deformation during the Paleocene. A model is presented to show in general terms the<br />
characteristics of these types of folds <strong>and</strong> also to explain the origin of observed kink.<br />
Key words: Tectonic, Kink B<strong>and</strong>s, Chevron Folds, dome-brachianticline, Ionian Zone, Paleocene,<br />
clay-siliceous-carbonate beds<br />
"GEOLOGIST'S MOSAIC"<br />
The purpose of this poster is to qualitatively <strong>and</strong> quantitatively analyse an outcrop with kink b<strong>and</strong>s in southern<br />
Albania (nearby the city of Sar<strong>and</strong>a), to place this particular deformation feature into its local <strong>and</strong> regional<br />
context, to discuss the structural <strong>and</strong> tectonic significance of kinking <strong>and</strong> to explain the tectonic conditions in<br />
which kinking occurs in the study area.<br />
In the geological interpretation <strong>and</strong> aspect this "MOSAIC" represents a complication dome-brachianticline in the<br />
western flank of the Sar<strong>and</strong>a anticline. This section viewed as an asymmetric anticline. The south-eastern flank<br />
has a gentle dipping (about 25° - 30°), while the north-western flank has steepness bigger then that, almost<br />
vertical (Fig. 1).<br />
In terms of geological setting this section is of Paleocene in age. Mostly, the centre of the structure is covered<br />
as a "roof from a thick turbidite horizon, which uncovered in the south-western flank of the mosaic. The<br />
carbonate strata are represented from thin-bedded limestones with reddish <strong>and</strong>/or greenish cherty intercalations<br />
few centimetres thick <strong>and</strong> from very thin clay-siliceous-carbonate beds.<br />
The difference in thickness between turbidite limestone strata which have been repeated in the section <strong>and</strong><br />
which has a thickness of 1 - 2 meters (competent layer), <strong>and</strong> thin limestone layer of about 0.4 meters<br />
(incompetent) strata with cherty intercalations which are also dominant in the section, have been created a<br />
kink b<strong>and</strong>s <strong>and</strong> chevron folds mosaic inside this section with different shapes, <strong>and</strong> with a moderate ratio "n" (n<br />
= d2/di, di = competent layer; d2 = incompetent layer). The estimation of the shortening for the whole structure,<br />
caused by the "megakinks" is between 33% <strong>and</strong> 36%. These kink b<strong>and</strong>s <strong>and</strong> chevron folds are not characteristic<br />
for the turbidite limestone strata, which has been as boundaries inside of which have been developed the<br />
disharmonic microfolds.<br />
Geometric characteristic of the microfolds are very different, they change in the south-eastern flank of the<br />
mosaic, in the core, north-western flank as if from the top to the bottom of the mosaic.<br />
The south-eastern flank of the mosaic is less affected from the kink b<strong>and</strong>s. This flank, which has a gentle<br />
dipping <strong>and</strong> could have been affected by the tectonic press or even extension, that caused non-development of<br />
the typical microfolds but just some flexural slips <strong>and</strong> some kink b<strong>and</strong>s. If it will supposed that both of the<br />
turbidite horizons where thin carbonate strata it's attached, will move up <strong>and</strong> down, the stress create a<br />
orientation when the shear stress acted as a b<strong>and</strong> <strong>and</strong> create the kink b<strong>and</strong>s.<br />
47
-----------------------------------------------------------------------------------------------------------------------------------<br />
1. The term "Geologist's mosaic" was used (DURMISHI Ç.) in the National Conference of Geology, Tirana<br />
2000.<br />
A<br />
B<br />
FIGURE 1.General schematic view of the “GEOLOGIST’S MOSAIC”<br />
Another reason could be also the fact that, in this flank the thick turbidite strata is imposing its folding style to<br />
the thin carbonate strata, that should not been microfolded. This could be the case, because we can see in the<br />
top of the strata <strong>and</strong> even in the northwestern flank of the mosaic, nearby these horizons that there is not an<br />
intensive development of the microfolding.<br />
48<br />
C
The north-western flank <strong>and</strong> the centre of the mosaic are complicated with a large amount of the kink b<strong>and</strong>s.<br />
The hinge area in these folds is sharp <strong>and</strong> the limbs are getting directly connected at the hinge.<br />
In the top of the mosaic, just below to the turbidite strata, folding are rarely compare to the bottom part of the<br />
mosaic from the effect of the turbidite horizons.<br />
In the limbs of the most well developed kinks, are seen some microfolds, the limbs of which are continuing<br />
almost horizontal in direction (bottom - up) of the turbidite horizon.<br />
The kinks in their sharp part has the tendency to extend the "angle", while the thickness, mostly in the ductile<br />
strata is getting bigger <strong>and</strong> in some places gives the impression of saddles.<br />
In the centre of the mosaic are also seen few folds with the shape of the M-letter, which could have been the<br />
effects of the horizontal forces that can be acted over there.<br />
In the western flank of the mosaic, nearby the centre have been developed some box folds, but they have<br />
very gentle dipping axial plane to the bottom of the section, almost convex the upper limb, but with vertical<br />
or overturned the lower limb.<br />
All these folds are linked with the stress tectonic regime which have been occurred later, with the force<br />
orientation in oblique manner or along the layering of the hole anticline structure of Sar<strong>and</strong>a with normal stress<br />
oriented from southeast - northwest which in the framework of structuration of the Ionian zone, create also the<br />
structure of Sar<strong>and</strong>a.<br />
Some of the conclusions over the stress fields acted in the area under investigation are presented below:<br />
� Phase of the carbonate <strong>and</strong> flysch accumulation during Mesozoic to Aquitanian. Stress field could<br />
have been in extension with the orientation east-northeast - west-southwest if later there was no<br />
rotation.<br />
� Lower Miocene, before the Burdigalian. Compression <strong>and</strong> folding, which will have been, placed the<br />
Burdigalian with angular unconformity over the flysch.<br />
REFERENCES<br />
Baronnet, A. <strong>and</strong> Olives, J., 1983. The geometry of micas around kink b<strong>and</strong> boundaries I. A crystallographic<br />
model. Tectonophysics, 91: 359-373.<br />
Bega, Z., Seifert, P. <strong>and</strong> Ballauri, A., 2001. New <strong>and</strong> mature carbonate plays revive exploration in Albania.<br />
EAGE 63rd Conference & Technical Exhibition, Amsterdam, The Netherl<strong>and</strong>s, 11-15 June 2001, P518.<br />
Frank, F. C. <strong>and</strong> Stroh, A. N., 1952. On the theory of kinking. Phys. Soc. Proc. Ser. B. 65:811-821<br />
Melo, V. et al., 1991/a. Tectonic windows of the Outer Zones in the eastern regions of Albanides. Bui.<br />
Shkenc. Gjeologjike, No. 1, pp. 21-29, Tirana (in Albanian).<br />
Melo, V. et al., 1991/b. Thrust structures in the Albanides. Bui Shkenc. Gjeologjike, No. 1, 7-20, (in<br />
Albanian).<br />
Van geet, M., Swennen, R., Durmishi, C, Roure, F. <strong>and</strong> Mushez Ph., 2001. Paragenesis of Cretaceous to<br />
Eocene carbonate reservoirs in the Ionian fold <strong>and</strong> thrust belt (Albania): relation between tectonism <strong>and</strong><br />
fluid flow.<br />
49
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
INSTRUMENTAL SEISMOLOGICAL DATA <strong>and</strong> GEOLOGICAL INVESTIGATION<br />
of 2009 EARTHQUAKE, at GJORICA, DIBRA REGION<br />
E. DUSHI, Y. MUCEKU, J. SKRAMI & M. ZACAJ<br />
Institute of Geosciences, Polytechnics University of Tirana, Albania<br />
e.dushi@geo.edu.al; edmonddushi@yahoo.com<br />
(Poster presentation)<br />
On September 6, 2009 a strong earthquake (MW = 5.2), occurred in the northeastern Albania,<br />
in Gjorica, Dibra region, causing many damages in a large area <strong>and</strong> was felt till central part<br />
of Albania. The macroseismic effects have been revealed from field geological <strong>and</strong><br />
seismotectonic observations. This earthquake has been followed by 678 aftershocks, where<br />
130 are localized. From earthquake analysis, the source parameters for this event <strong>and</strong> 13<br />
immediate subsequent aftershocks are determined. To perform this investigation through re<br />
evaluation of parameters, data recorded from BB seismic stations of Albanian Seismological<br />
Network have been used, (Fig. 1).<br />
Fig. 1: Registered BB wave forms of September 6, 2010 event (21:49 UTC) event, from BCI, PUK,<br />
PHP, TIR, KBN <strong>and</strong> SRN seismic station of Albanian Seismological Network.<br />
From the focal mechanism solution results that this earthquake has been triggered from the<br />
activation of oblique normal fault (Fig. 2), with an active plane striking 210 0 -219 0 NE, dipping 40 0<br />
<strong>and</strong> sliping -90 0 . This solution is in good acordance with the field geological observations.<br />
51
Fig. 2: Epicentral map of September 6, 2009 (21:49 UTC) main shock <strong>and</strong> its imediately subsequent<br />
aftershocks in connection with the distribution of BB seismological stations <strong>and</strong> focal mechanism<br />
solution of Gjorica earthquake.<br />
Spectral analyze has been performed based on the Brune (1970) theoritical model for source<br />
displacement spectrum, taking into acount various assumption on geometrical spreading factor <strong>and</strong><br />
anelastic attenuation due to local heterogenity effect on traveling seismic wave energy (Fig. 3).<br />
Fig. 3: Displacement Spectras from horizontal components, for the September 6, 2009 event (21:49<br />
UTC).<br />
Seismic energy, radiated from September 6, 2009 event source express a significant macroscopic<br />
parameter to evaluate the seismic potential witch lead to the macroseismic effect in a broad area. To<br />
determine this parameter, dynamic methode has been used. This methode takes into acount the<br />
velocity power spectra integrated over frequency. These corrected velocity spectra for each of the<br />
horizontal component have been determined (Fig. 5), from velocity seismic traces corrected for the<br />
effect of recording instrument response, (Fig. 4).<br />
Velocity<br />
0.0001<br />
0.0000<br />
-0 .0 0 0 1<br />
0.0 0.5 1.0 1.5 2.0 2.5 3.0<br />
0.0001<br />
Z<br />
0.0000<br />
-0 .0 0 0 1<br />
0.0 0.5 1.0 1.5 2.0 2.5 3.0<br />
0.0001<br />
N<br />
0.0000<br />
-0 .0 0 0 1<br />
m /s<br />
0.0 0.5 1.0 1.5 2.0 2.5 3.0<br />
Time m in<br />
�<br />
Fig. 4: Three velocity trace waveforms, corrected for instrument response, of BCI records of<br />
September 6, 2009 event (21:49 UTC).<br />
52<br />
E
Fig. 5: Power Velocity <strong>and</strong> Cumulative Power Velocity Spectra from horizontal components, for the<br />
September 6, 2009 event (21:49 UTC).<br />
Achieved values from spectral analysis, for the main event are seismic moment M0 = 7.9 x<br />
10 23 dyne-cm, static stress drop �� = 54.8 bar <strong>and</strong> seismic energy ES = 2.3 x 10 19 erg, slightly<br />
different from respective previously ones.<br />
From point of view of the geological <strong>and</strong> tectonics-neotectonics phenomena the region where<br />
the studied zone is included take part in Krasta- sub-tectonic zone, which include in external<br />
area of Alpine folding. It is strongly affected by pre-Pliocene tectonics movement. As, it is<br />
seen in the Vlora-Elbasan-Diber fault as weak environment, where the evaporate has break<br />
through the sedimentary deposits of the Triassic-Eocene-Oligocene- rocks <strong>and</strong> erupted. All<br />
these bring proofs the evaporate deposit when are in motion process generate the earthquake.<br />
Fig 6: Geological map of studied region<br />
The seismic hazard at a place has a direct connection with the geology in the location. Areas with hard<br />
rock’s as limestones <strong>and</strong> ultrabassic deposits, have a lower seismic hazard than areas with soft rocksflysch<br />
<strong>and</strong> molasses <strong>and</strong> liquid sediments. The Dibra earthquake is concentrated on the north of the<br />
Okshtuni tectonic window <strong>and</strong>, in a zone which is referred to as the Okshtuni deep fault, a tectonic<br />
zone which starts at Vlora fault <strong>and</strong> continues to Elbasan <strong>and</strong> end up northeast of Dibra at the area of<br />
the Macedonia. One factor, which affects the attenuation of the seismic waves, is the geology (Fig. 6).<br />
Keywords: seismic moment, stress drop, radiated seismic energy, geological investigation<br />
53
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
IMPACT of BASEMENT CONFIGURATION <strong>and</strong> SEDIMENT ARCHITECTURE on<br />
GRAVITY GLIDING on UNDER-COMPACTED SHALE DECOLLEMENTS<br />
Nadine ELLOUZ-ZIMMERMANN*, Raymi CASTILLA*, François ROURE*, Khalid<br />
AL HOSANI**, Saleh AL MAHMOUDI** <strong>and</strong> Abdullah GAHNOOG **<br />
*IFP Energies Nouvelles, 1-4 av de Bois-Préau, 92856 Rueil-Malmaison, France.<br />
** Ministry of Energy, Abu Dhabi, Emirates<br />
What are the dominant parameters which governed the tectonic style in gravity-driven<br />
complex tectonics on deep shale décollements levels along margins? One of the first order<br />
parameter concerns overloading process on platforms. Associated, either to intense<br />
erosion/deposition in compressive margins, or driven by rivers which convey huge amount of<br />
sediment up to deltas, the overloading in strongly link with the development of overpressure<br />
cells within deep shale layer. Location of the depocenters or of the prograding deltas through<br />
time, should also be a critical parameter for the evaluation of deformed traps.<br />
To be able to identify some criteria of the generation of deformed zones, the architecture of<br />
the deep structures was analyzed through time, via analogue models, in order to evaluate the<br />
impact of several parameters which could vary in 3D. All the models have been acquired with<br />
X-Ray tomography at IFP, <strong>and</strong> calibrated at a first order scale on subsurface data from<br />
Chamak Survey- in the Makran compressive margin, in the Sinu accretionary prism <strong>and</strong> in the<br />
East Oman Margin, atypical passive margin developed on the Oman Emirates Fold-<strong>and</strong><br />
Thrust belt.<br />
Several sensitivity tests have been done on décollement level configuration; dip, interruption<br />
on basement blocks, <strong>and</strong> various ratio between ductile <strong>and</strong> brittle layers..<br />
It appears that the characteristics of initial configurations either of the basement, or of the<br />
sedimentary patterns governed not only the distribution <strong>and</strong> the direction of the normal<br />
growth faults system, but also the location <strong>and</strong> the amplitude of the down-slope compressive<br />
deformation.<br />
Cylindrical progradations of various extension -above or behind the compressive front, can<br />
freeze the gravity-driven compressive front <strong>and</strong> evenly can be dissected by a new growth fault<br />
system, or reactivated <strong>and</strong> translated downslope.<br />
Out coming results allow 1) to improve seismic interpretation in blind areas when<br />
overpressured shale mobilization processes dominated 2) to estimate the timing <strong>and</strong> the<br />
nature of the deep structures development, <strong>and</strong> 3) to be predictive on the preservation of the<br />
deepest traps.<br />
55
Mary FORD<br />
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
CORINTH RIFTING <strong>and</strong> its ROLE in the GEODYNAMIC EVOLUTION<br />
of the AEGEAN-IONIAN REGION<br />
1 Nancy Université, CRPG, 15 Rue Notre Dame des Pauvres, B.P.20, 54501, V<strong>and</strong>oeuvre-lès-<br />
Nancy Cedex, France<br />
The Gulf of Corinth (100 km by 30 km) is an active rift within a rapidly evolving diffuse plate<br />
boundary linking the dextral Kefalonia <strong>and</strong> North Anatolian faults. It lies above the NW<br />
subducting African plate. The rift initiated sometime in the late Pliocene <strong>and</strong> was<br />
superimposed on the NNW-SSE trending Hellenide orogenic belt of Oligocene age. The synrift<br />
stratigraphy <strong>and</strong> structure of the early Corinth rift is today uplifted <strong>and</strong> spectacularly<br />
exposed along the southern margin of the Gulf. Major normal faults are planar <strong>and</strong> dip<br />
predominantly north (45° to 65°) with an average strike of N110°. Kinematic analyses reveal<br />
a paleo-extension direction varying from N355° to N020°, sub-parallel to present day<br />
extension across the Gulf. Detailed mapping of syn--rift stratigraphy reveals three phases of<br />
rifting. Fault activity <strong>and</strong> syn-rift depo-centres migrated north with time as the rift narrowed.<br />
Total N-S extension across the whole western rift is estimated to be 11 km (7.2 km offshore<br />
<strong>and</strong> 3.8 km onshore). Extension accelerated significantly at around 1.4 Ma <strong>and</strong> at 800-600 ka<br />
when rapid uplift of the south flank started. Present day geodetically measured extension rates<br />
are 1.6 cm/a in the west <strong>and</strong> 1.1cm/a in the east. Crustal layering generated by the stacking of<br />
Hellenide thrust sheets has strongly influenced the dynamics of the rift <strong>and</strong> generated lateral<br />
variations in rift geometry. However crustal structure <strong>and</strong> rheology are so far poorly defined.<br />
This paper looks at the controversial <strong>and</strong> problematical role of the N-S Corinth rifting within<br />
the regional geodynamic evolution of the Aegean-Ionian area.<br />
57
Alfred FRASHERI<br />
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
TEMPERATURE SIGNALS FROM ALBANIDES DEPTH<br />
Faculty of Geology <strong>and</strong> Mining, Polytechnic University of Tirana<br />
In the paper are presented the result of the geothermal modeling in Albanid-1 <strong>and</strong> Albanid-2 lines.<br />
These modeling are part of geothermal studies in Albania during the 90 years, in the framework of<br />
Geothermal Atlas of the Albania, European Geothermal Atlas <strong>and</strong> European Geothermal Resources<br />
Energy Atlas.<br />
Geothermal gradient changes from western to the eastern part of the Albania, <strong>and</strong> in the depth, too.<br />
The gradient values vary from 15-21.3 mK/m in Pre-Adriatic Depression. According to the<br />
modeling results, deeper than 20 km is observed decreasing of the gradient. This change of the<br />
gradient is coincided with the top of the crystal basement. In the ophiolitic belt of the Inner<br />
Albanides, the geothermal gradient has a value up to 36 mK/m at northeaster <strong>and</strong> southeastern part<br />
of the Albania. Decreasing of the gradient are observed deeper than 12 000 meters in this side of<br />
Albania, at the top of the Triassic salts deposits. In the both lines are observed that the temperatures<br />
in ophiolitic belt are higher than in the sedimentary basin, at the same depth.<br />
In the Heat Flow Density Map of Albania, is possible to observed two particularities of the<br />
scattering of the thermal field of the Albanides:<br />
Firstly, 42 mW/m 2 is maximal value of the heat flow in the External Albanides. At the eastern part<br />
of Albania, the heat flow density values are up to 60 mW/m 2 . Radiogene heat generation of the<br />
ophiolites is very low. In these conditions, increasing of the heat flow in the ophiolitic belt, are<br />
linked with heat flow from the depth. According to the Alb-1 line, the granites of the crystal<br />
basement, which have the possibilities for the great radiogenic heat generation represents the heat<br />
source. In ophiolitic belt, is observed decreasing of the MOHO discontinuity depth.<br />
Secondly, in the ophiolitic belt are observed some hearth of higher heat flow density. Heat flow<br />
anomalies are conditioned by intensive heat transmitting through deep <strong>and</strong> transversal fractures.<br />
These fractures are conditioned location of the geothermal energy sources. According to the<br />
calculation of different geothermometers, the aquifer estimated temperatures are 144 to 270 o C.<br />
Based on the geothermal modeling, one can suppose that thermal waters rises from 8-12 km deep,<br />
where temperature attains to 220 o C.<br />
59
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
GEOPHYSICAL OUTLOOK on STRUCTURE of the ALBANIDES<br />
Alfred FRASHERI 1 , Salvatore BUSHATI 2 , Vilson BARE 3<br />
1 Polytechnic University of Tirana, Faculty of Geology <strong>and</strong> Mining, Tirana, Albania.<br />
2 Academy of Sciences of Republic of Albania, Tirana, Albania<br />
The Albanides represents the assemblage of the geological structures in the territory of Albania.<br />
This paper presents the structural analysis of the Albanides according to the seismological,<br />
reflection seismic, gravity, magnetic, electrical, <strong>and</strong> geothermal surveys. Two major<br />
peleogeographic domains form the Albanides. The Internal Albanides formed part of the<br />
Subpelagonian Trough. The External Albanides was developed out of the western passive margin<br />
<strong>and</strong> continental shelf of the Adriatic plate. Regional gravity anomalies <strong>and</strong> seismological data are<br />
interpreted as caused by the variation of the depth of Moho discontinuity, <strong>and</strong> a block construction<br />
of the crust. The Earth crust in Albanides is interrupted by a system of longitudinal fractures in NW<br />
- SE direction <strong>and</strong> transversal fractures. Intensive Bouguer anomalies <strong>and</strong> turbulent magnetic field<br />
with weak anomalies characterize ophiolitic belt of the Internal Albanides. These data show about<br />
the allochton character of ophiolites. The relations between the Internal <strong>and</strong> the External Albanides<br />
have a nape character, going toward SW. A joint characteristic of structural belt of Ionian <strong>and</strong> Kruja<br />
zones in External Albanides is their westward thrusting, too. Two tectonic styles are observed in the<br />
Ionian tectonic zone: duplex <strong>and</strong> imbricate tectonic. Miocene <strong>and</strong> Pliocene molasses of Peri-<br />
Adriatic Depression cover Western part of Ionian zone.<br />
Interpretation of the results of integrated geophysical surveys, in the framework of geological<br />
studies is presented in the paper.<br />
61
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63
41.5°<br />
41°<br />
40.5°<br />
40°<br />
0 50 km<br />
42°<br />
41°<br />
40°<br />
Durres<br />
Karavatsas<br />
Lagoon<br />
C.p.<br />
Nartës<br />
Lagoon<br />
Tirana<br />
Ionian<br />
Sea<br />
Erzen<br />
Vlorë<br />
19° 20° 21°<br />
S hkumbin<br />
Ap.A.<br />
Ar.A.<br />
Seman<br />
Tirane<br />
S.A.<br />
Tepelenë<br />
Reverse Fault<br />
Normal Fault<br />
39.5°<br />
19° 20°<br />
?<br />
?<br />
Lushnje<br />
L.T.T.<br />
Elbasan<br />
Berat<br />
E.G.<br />
Pa.D.<br />
T.T.<br />
O<br />
s u m<br />
V j o s a<br />
Sar<strong>and</strong>ë<br />
Librazdhi<br />
Gramsh<br />
Strike-slip Fault<br />
Anticline Fold<br />
Progradec<br />
Devo l Vithkuq<br />
W.E.N.F.S.<br />
Ersekë<br />
Permët<br />
K.N.F.S.<br />
Aristi<br />
Ioannina<br />
Borders<br />
Ohrid<br />
Lake<br />
N.N.F. N.N.F.<br />
W.G.N.F.S.<br />
N.N.F.<br />
N<br />
Prespa<br />
Lake<br />
Korçë<br />
Konitsa<br />
P.W.N.F.<br />
K.N.F.<br />
Kipi<br />
Scale<br />
0 20km<br />
Figure 1. Neo-tectonic map of the Southern Albania <strong>and</strong> North-western Greece (Modified from Aliaj et al., 1996 <strong>and</strong> Carcaillet, et<br />
al, 2009). Areas located within 200 m above Sea level are in light grey. Dark grey stars indicate published data (Lewin et al., 1991;<br />
Hamlin et al., 2000; Woodward et al., 2001; Carcaillet et al., 2009) <strong>and</strong> red stars indicate data computed in the present study. Fault<br />
<strong>and</strong> fold types are described in the picture caption <strong>and</strong> the overall current tectonic deformation is represented by black arrows (from<br />
Jouanne et al., submitted). (C.p.) Coastal pop-up; (Ar.A.) Ardenica Anticline; (Ap.A.) Apollonia Anticline; (S.A.) Shkumbin<br />
Anticline; (T.T.) Tomorrica Thrust; (L.T.T.) Lushnje - Tepelenë Thrust; (B.N.F.) Bulcar Normal Fault; (E.G.) Elbasan Graben;<br />
(N.N.F.) Nerotrivi Normal Fault; (K.N.F.S.) Konitsa Normal Fault Systems; (P.W.N.F.) Papingo West Normal Fault; (K.N.F.) Kipi<br />
Normal Fault; (W.G.N.F.S.) West Graben Normal Fault Systems; (W.E.N.F.S.) West Ersekë Normal Fault Systems; (PaD)<br />
PaleoDevoll.<br />
well as from in situ produced 10 Be <strong>and</strong> radiocarbon ( 14 C) dating specifically performed for this<br />
study. We dated organic residues (eleven 14 C ages) <strong>and</strong> quartz rich pebbles collected into layers<br />
64<br />
21°
Incision rate (m/ka)<br />
developed during the ultimate flooding event <strong>and</strong> considered the value as the age of ab<strong>and</strong>onment<br />
of the alluvial terrace. This implies that the age of the terrace ab<strong>and</strong>onment is contemporaneous to<br />
the age of deposition of the highest terrace layer. Cosmonuclide (in situ produced 10 Be) age<br />
determinations are in process on siliceous rich pebbles collected along depth-profiles of two<br />
terraces of the lower Skhumbin <strong>and</strong> on the top of the upper Osum. Incision rate has been calculated<br />
by dividing the elevation of the terraces above the river by the age of the upper surface of the<br />
terraces; the vertical motions of the faults have been deduced from the local change of the incision<br />
rates.<br />
Results <strong>and</strong> discussion<br />
The results are shown in the three following diagrams (Fig. 2, 3, 4) that allow comparing the<br />
incision rate, the location of the faults <strong>and</strong> the aspect of the river profile for the three rivers (The<br />
lower Shkumbin is considered as the paleo-lower part of the Devoll). A table (Table 1) indicates the<br />
most active structures evidenced by a step.<br />
West<br />
5<br />
4.5<br />
Post LGM<br />
Pre LGM<br />
East<br />
4 Linear regression Post LGM<br />
3.5<br />
by tectonic blocks<br />
3<br />
2.5<br />
2<br />
1.5<br />
1<br />
0.5<br />
0<br />
W.E.N.F.S.<br />
120 145 170 195 220<br />
Distance from the Sea (km)<br />
Figure 3. Evolution of the incision rate along the river<br />
profile of the Vjosa. bed. In the river profile are located the<br />
Lushnje - Tepelenë Thrust (L.T.T.), Nerotrivi Normal fault<br />
(N.N.F.), Konitsa Normal Fault Systems (K.N.F.S.)<br />
Papingo West Normal Fault (P.W.N.F.).<br />
Incision rate (m/ka)<br />
2.0<br />
1.6<br />
1.2<br />
0.8<br />
0.4<br />
0<br />
West<br />
Pre LGM<br />
Linear regression Pre LGM<br />
by tectonic blocks<br />
23 m<br />
0.9 m/ka<br />
L.T.T.<br />
T.T.<br />
5m<br />
0.2 m/ka<br />
S.A.<br />
28.6 m<br />
1.7 m/ka<br />
E.G.<br />
2.1 m/ka<br />
35 m<br />
11 m<br />
0.4 m/ka<br />
1000<br />
500<br />
0<br />
Elevation above<br />
Sea level (m)<br />
Figure 2. Evolution of the incision rate along the<br />
river profile of the Osum. Left axis is the calculated<br />
incision rate; right axis is the elevation of the presentday<br />
river bed. Colour of the diamonds refers to the<br />
different terraces units. Into the lower box, appear the<br />
actual river profile where are located the actives<br />
faults. Bold lines represent normal faults belong of<br />
West Ersekë Normal Fault Systems (W.E.N.F.S.)<br />
producing surface displacements <strong>and</strong> the dashed lines<br />
represent the Tomorrica Thrust (T.T.) which would<br />
not influence in the evolution of the river profile.<br />
60 85 110 135 160 185<br />
East<br />
T.T. B.N.F. W.G.N.F.S.<br />
25 50 75 100 125 150 175<br />
9m<br />
0.3 m/ka<br />
Elbasan Basin Korça Basin<br />
>1 m/ka<br />
Lower Shkumbin PaleoDevoll Devoll<br />
Incision rate (m/ka)<br />
West<br />
1.2<br />
Figure 4. Evolution of the incision rate along the combined river profile of the lower Shkumbin <strong>and</strong> Devoll. In the river profile are<br />
located the Lushnje - Tepelenë Thrust (L.T.T.), the Shkumbin Anticline (S.A.), Tomorrica Thrust (T.T.), the Burcal Normal Fault<br />
(B.N.F.) <strong>and</strong> the West Graben Normal Fault Systems (W.G.N.F.S.) producing surface displacements.<br />
65<br />
1<br />
0.8<br />
0.6<br />
0.4<br />
0.2<br />
0<br />
Post LGM<br />
Pre LGM<br />
?<br />
3m<br />
0.2 m/ka<br />
?<br />
L.T.T.<br />
>0.8m/ka<br />
Konitsa Basin<br />
>0.4m/ka<br />
K.N.F.S.<br />
N.N.F. P.W.N.F.<br />
800<br />
400<br />
0<br />
Elevation above<br />
Sea level (m)<br />
East<br />
1000<br />
500<br />
0<br />
Elevation above<br />
Sea level (m)
Results suggest that: a) The incision rate reaches the greatest values in the Osum area; b) The<br />
incision is more strongly controlled by the normal faults than the thrust faults; c) The normal<br />
faulting linked to the East Albanian graben systems seems more active than the normal faulting that<br />
affects the North West part of Greece.<br />
Table 1. Kinematic of active structures active analyzed from the incision of the terraces levels of the Vjosa, Osum,<br />
Devoll <strong>and</strong> Shkumbin rivers.<br />
Name Structure River Vertical slip movement (m/ka)<br />
Coastal pop - up PaleoSeman ~ 0.1 ( Fouache et al, 2010)<br />
Shkumbin Anticline Shkumbin ~ 0.2<br />
Elbasan Graben Shkumbin > 1<br />
Lushnje - Tepelenë Thrust Shkumbin ~ 0.9<br />
Lushnje - Tepelenë Thrust Vjosa ~ 0.2<br />
Tomorrica Thrust Devoll ~ 0.4<br />
Burcal Normal Fault Devoll ~ 0.3<br />
Nerotrivi Normal Fault Vjosa > 0.4<br />
Konitsa Normal Fault Systems Vjosa > 0.4<br />
Papingo West Normal Fault Vjosa ~1.8 between 25 <strong>and</strong> 17 Ka (Carcaillet, et al, 2009)<br />
West Graben Normal Fault Systems Devoll > 0.8<br />
West Ersekë Normal Fault Systems Osum 1.7 – 2.1<br />
References<br />
Aliaj, Sh., Melo, V., Hyseni, A., Skrami, J., Mëhillka, Ll. Muço, B., Sulstarova, E., Prifti, K., Pashko, P., Prillo, S., 1996.<br />
Neo-tectonic map of Albania, scale 1: 200000. Archive of seismology Institute, Tirana, Albania.<br />
Aliaj, S.H., 1997. Alpine geological evolution of Albania. Albanian Journal of Natural <strong>and</strong> Technology Sciences 3, 69-81.<br />
Aubouin, J, Ndojaj, I., 1964. Regard sur la géologie de l’Albanie et sa place dans la géologie des Dinarides. Bulletin de la<br />
Société Géologique de France 6, 539-625.<br />
Baker, C., Hatzfeld, D., Lyon-Caen, H., Papadimitriou, E., Rigo, A., 1997. Earthquake mechanisms of the Adriatic Sea<br />
<strong>and</strong> Western Greece: implications for the oceanic subduction-continental collision transition. Geophysical Journal<br />
<strong>International</strong> 131, 559-594.<br />
Carcaillet, J., Mugnier, J.L., Koçi, R., Jouanne, F., 2009. Uplift <strong>and</strong> active tectonics of southern Albania inferred from<br />
incision of alluvial terraces. Quaternary Research 71, 465-476.<br />
Fouache E., Vella C., Dimo, L., Gruda, G., Mugnier, J-L., Denèfle, M., Monnier, O., Hotyat, M., Huth. E., 2010.<br />
Shoreline reconstruction since the Middle Holocene in the vicinity of the ancient city of Apollonia (Albania, Seman <strong>and</strong><br />
Vjosa deltas). Quaternary <strong>International</strong> 216, 118–128<br />
Goldsworthy, M., Jackson, J., Haines, J., 2002. The continuity of active fault systems in Greece. Geophysical Journal<br />
<strong>International</strong> 148(3), 596-618.<br />
Hamlin, R.,Woodward, J., Black, S., Macklin, M.G., 2000. Sediment fingerprinting as 580 a tool for interpreting long-<br />
term river activity: the Voidomatis basin, NWGreece. In: 581 Foster, I.D.L. (Ed.), Tracers in Geomorphology. Wiley,<br />
Chichester, 473–501.<br />
Jouanne, F., Bushati, S., Mugnier, J.L., Shinko, I., Pasha, M., Koci, R. GPS constrains on current tectonics of Albania.<br />
Geophysical Research Letters, Submitted.<br />
Koçi, R., Bushati, S., Mugnier, J-L., Perenjesi, E., 2009. The river tarraces-indicators of the neotectonic movements in<br />
Albania. 5 th Congress of Balkan Geophysical Society. Belgrade, Serbia.<br />
Lewin, J., Macklin, M.G., Woodward, J.C., 1991. Late Quaternary fluvial sedimentation in the Voidomatis basin, Epirus,<br />
Northwest Greece. Quaternary Research 35, 103-115.<br />
Macklin, M.G., 2000. Sediment fingerprinting as a tool for interpreting long-term river activity: the Voidomatis basin,<br />
NW Greece. In: Foster I.D.L. (Ed.), Tracers in geomorphology. Wiley, Chichester, pp. 473-501.<br />
Roure, F., Nazaj, S., Mushka, K., Fili, I., Cadet, J.P., Bonneau, M., 2004. Kinematic evolution <strong>and</strong> petroleum systems -<br />
An appraisal of the Outer Albanides. In: Mc Clay K.R. (Ed.), Thrust tectonics <strong>and</strong> hydrocarbon systems. AAPG memoir<br />
82, pp. 474-493.<br />
Woodward, J.C. Hamlin, R.B.H., Macklin, M.G., Karkanas, P., Kotjabopoulou E., 2001. Quantitative sourcing of<br />
slackwater deposits at Boila rockshelter: A record of late-glacial flooding <strong>and</strong> palaeolithic settlement in the Pindus<br />
Mountains, Northern Greece. Geoarchaeology 16(5), 501-536.<br />
66
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
CONTRACTION <strong>and</strong> VERTICAL MOVEMENTS in the GARGANO PROMONTORY<br />
<strong>and</strong> ADJACENT OFFSHORE: IMPLICATION for the TECTONICS of the SOUTH<br />
ADRIATIC DOMAIN<br />
Nicolaas J. HARDEBOL <strong>and</strong> Giovanni BERTOTTI<br />
Delft Univ. of Techn., Stevinweg 1, 2628 CN Delft, the Netherl<strong>and</strong>s; VU University, De<br />
Boelelaan 1085, 1081 HV Amsterdam, The Netherl<strong>and</strong>s; T +31 15 27 81352; E<br />
N.J.Hardebol@tudelft.nl<br />
Introduction<br />
The Adriatic plate has been described as a double-verging plate that is bordered to the west by<br />
the Apenninic <strong>and</strong> to the east by the Dinaric-Helvetic fold-<strong>and</strong>-thrust belts (Figure 1a). The<br />
interior of the plate supposedly hosts a north-south trending flexural bulge from Istria to the<br />
Gargano promontory (<strong>and</strong> the Apulian Ridge), which divides the Adriatic basins in respect to<br />
their relative forel<strong>and</strong> position to either the Apenninic or Dinaride orogenic systems. The<br />
Neogene deformation history <strong>and</strong> vertical motions in the interior of the Adriatic plate is<br />
subject to flexural forcing or compressional effects transmitted from the plate margins. This<br />
study present new field <strong>and</strong> offshore seismic data from the Gargano Promontory <strong>and</strong> adjacent<br />
Southern Adriatic Basin to examine their deformation history.<br />
The Southern Adriatic Basin (SAB) stretches southeast-ward offshore of the Gargano <strong>and</strong><br />
Puglia coastlines (Figure 1a) <strong>and</strong> is underlain by a basement of Triassic-Lias salts to platform<br />
carbonates <strong>and</strong> a Lias-Cretaceous succession of mostly pelagic carbonates <strong>and</strong> marls that<br />
show an eastward, Dinaric-Hellenic facing dip. The SAB contains an Oligocene to Quaternary<br />
succession of mainly siliciclastics <strong>and</strong> calcarenites <strong>and</strong> subject to tilting <strong>and</strong> faulting of strata<br />
that are commonly regarded as transtensional <strong>and</strong> transpressional expressions linked to<br />
basement lineaments.<br />
The Gargano Promontory (GP) to the north forms up to 1000m relief <strong>and</strong> comprises mostly<br />
Jurassic-Cretaceous carbonates. The GP exhibits a peculiar morphological shape with four<br />
prominent peneplains that are divided by high <strong>and</strong> steep slopes (Figure 1d). Miocene shallowwater<br />
limestones cover the eroded substratum unconformably <strong>and</strong> are found over most of the<br />
Gargano Promotory. Post-Lower Messinian deposits however are scarce <strong>and</strong> especially<br />
developed onto the two lowermost peneplains at 80m <strong>and</strong> 200m along the southern border of<br />
the GP (Figure 1b). These Mio-Pliocene deposits cover erosional surfaces <strong>and</strong> contain<br />
diagnostic coastal cliff facies linked to abrasive marine terrace that help deciphering the<br />
Tertiary deformation <strong>and</strong> relief development (Casolari et al., 2000; Bertotti et al., 2001).<br />
This study presents new data from the GP <strong>and</strong> from offshore seismic profiles of the SAB. We<br />
examine their contrasting physiographic expression in effect to a Miocene-Pliocene<br />
contractional <strong>and</strong> uplift-subsidence history. We especially focus on the marine terrace<br />
sediments in association to their tilted substratum for the GP <strong>and</strong> on the coeval depositional<br />
<strong>and</strong> deformation history in the adjacent SAB. The onshore field data <strong>and</strong> offshore seismic<br />
interpretations are combined aiming at a more univocal picture of the kinematics <strong>and</strong> vertical<br />
motions for Tertiary times.<br />
67
Uplift of the Gargano Promontory as recorded by abrasion terraces<br />
Rightly positioned on the presumed axis of the double-plunging Adriatic plate, the high relief<br />
of the Gargano Promontory (GP) appears as the most exquisite forebulge expression.<br />
However, despite this commonly held interpretation as flexural bulge, relief <strong>and</strong> structures of<br />
the GP pose certain challenges to this bulge concept.<br />
New field data has been acquired to examine the geometric affinity between the peneplains,<br />
the overlying deposits <strong>and</strong> relationship to structures from the Jurassic-Cretaceous substratum.<br />
Casolari et al. (2000) provided the sedimentological framework for the sediments that overly<br />
some of the peneplains by emphasising their distinct marine signature. Two marine<br />
formations are distinguished on the two lowermost terraces <strong>and</strong> which classify the erosional<br />
surfaces as marine terraces: the Rignano formation on a 200m terrace level <strong>and</strong> the Gravina<br />
Calcarenites formation (middle-upper Pliocene) on a 80m terrace level (Casolari et al., 2000).<br />
Our field observations show that the scarcely distributed deposits are remnants of a proximal<br />
coastal setting deposited on top of an abrasive marine terrace adjacent to coastal cliffs.<br />
Gravity derived coarse breccias are found in direct affinity with these cliff-walls, while finer<br />
breccias <strong>and</strong> conglomerates are found in the more distal parts of the terraces <strong>and</strong> contain a<br />
more marine calcarenite matrix. Distinct marine indicators are mainly found in the distal<br />
biocalcarenites in which some marine fossil assemblages have been previously identified <strong>and</strong><br />
described by Casolari (2000). A marine fingerprint is much more difficult to find for the<br />
conglomerates <strong>and</strong> breccias in direct contact with the cliff-wall. Alternative indicator for the<br />
marine origin is the erosional contact itself with the sharp <strong>and</strong> flat surface between the<br />
calcarenites truncating tilted substratum rocks <strong>and</strong> especially the occurrence of some wellpreserved<br />
wave-cut notches in the cliff-walls (Figure 1e).<br />
The Mass a Palacane location (MAP; see Figure 1c) on the 200m terrace contains the<br />
complete coastal facies with breccias <strong>and</strong> conglomerates juxtaposed to a sub-vertical cliffwall<br />
<strong>and</strong> grading southward over a distance of 300-400m into more distal calcaranites. Coarse<br />
breccias with clasts of 30-40 cm floating in a red dusty matrix are found in a small fringe at<br />
the steep slope <strong>and</strong> change laterally rapidly into widespread conglomerate <strong>and</strong> pebble-rich<br />
calcarenite. The clasts have a monomictic composition similar to the Jurassic-Cretaceous<br />
series of the terrace substratum <strong>and</strong> cliff walls.<br />
The two locations positioned on the lower 80m terrace, at base of the slope connected with the<br />
200m terrace level, are the Posta Mapuzza (POM; Figure 1c) in the east <strong>and</strong> the Masseria<br />
Figure 1. (a) Overview map of the Adriatic plate <strong>and</strong> location of the studied areas, (b) Structural map of the<br />
Gargano Promontory, (c) Field locations at the 80m <strong>and</strong> 200m terraces, (d) Geomorphological panorama <strong>and</strong><br />
(e) Mass a Palacane location (MAP) with field observations of a coastal cliff <strong>and</strong> wave-cut notch.
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
KINK BANDS <strong>and</strong> CHEVRON FOLDS CHARACTERISTICS of the SARANDA ANTICLINE:<br />
ESTIMATION of the "GEOLOGIST's MOSAIC", SOUTH-WESTERN ALBANIA<br />
Prof. Dr. Çerçis DURMISHI, Polytechnic of Tirana, Albania, cecodurmishi@yahoo.com<br />
Prof. Vangjel MELO, Polytechnic of Tirana, Albania<br />
Ing. Ervin LULA, Isl<strong>and</strong> <strong>International</strong> Exploration BV-Albania. elula@isl<strong>and</strong>oil<strong>and</strong>gas.com<br />
Observations of events leading to development of kink b<strong>and</strong>s, their origin, <strong>and</strong> changes in their<br />
morphology are recorded during the deformation in the "Geologist's mosaic" 1 ' in southern Albania.<br />
Kinking in natural deformed limestone strata has been investigated to determinate the complete history,<br />
of this deformation during the Paleocene. A model is presented to show in general terms the<br />
characteristics of these types of folds <strong>and</strong> also to explain the origin of observed kink.<br />
Key words: Tectonic, Kink B<strong>and</strong>s, Chevron Folds, dome-brachianticline, Ionian Zone, Paleocene,<br />
clay-siliceous-carbonate beds<br />
"GEOLOGIST'S MOSAIC"<br />
The purpose of this poster is to qualitatively <strong>and</strong> quantitatively analyse an outcrop with kink b<strong>and</strong>s in southern<br />
Albania (nearby the city of Sar<strong>and</strong>a), to place this particular deformation feature into its local <strong>and</strong> regional<br />
context, to discuss the structural <strong>and</strong> tectonic significance of kinking <strong>and</strong> to explain the tectonic conditions in<br />
which kinking occurs in the study area.<br />
In the geological interpretation <strong>and</strong> aspect this "MOSAIC" represents a complication dome-brachianticline in the<br />
western flank of the Sar<strong>and</strong>a anticline. This section viewed as an asymmetric anticline. The south-eastern flank<br />
has a gentle dipping (about 25° - 30°), while the north-western flank has steepness bigger then that, almost<br />
vertical (Fig. 1).<br />
In terms of geological setting this section is of Paleocene in age. Mostly, the centre of the structure is covered<br />
as a "roof from a thick turbidite horizon, which uncovered in the south-western flank of the mosaic. The<br />
carbonate strata are represented from thin-bedded limestones with reddish <strong>and</strong>/or greenish cherty intercalations<br />
few centimetres thick <strong>and</strong> from very thin clay-siliceous-carbonate beds.<br />
The difference in thickness between turbidite limestone strata which have been repeated in the section <strong>and</strong><br />
which has a thickness of 1 - 2 meters (competent layer), <strong>and</strong> thin limestone layer of about 0.4 meters<br />
(incompetent) strata with cherty intercalations which are also dominant in the section, have been created a<br />
kink b<strong>and</strong>s <strong>and</strong> chevron folds mosaic inside this section with different shapes, <strong>and</strong> with a moderate ratio "n" (n<br />
= d2/di, di = competent layer; d2 = incompetent layer). The estimation of the shortening for the whole structure,<br />
caused by the "megakinks" is between 33% <strong>and</strong> 36%. These kink b<strong>and</strong>s <strong>and</strong> chevron folds are not characteristic<br />
for the turbidite limestone strata, which has been as boundaries inside of which have been developed the<br />
disharmonic microfolds.<br />
Geometric characteristic of the microfolds are very different, they change in the south-eastern flank of the<br />
mosaic, in the core, north-western flank as if from the top to the bottom of the mosaic.<br />
The south-eastern flank of the mosaic is less affected from the kink b<strong>and</strong>s. This flank, which has a gentle<br />
dipping <strong>and</strong> could have been affected by the tectonic press or even extension, that caused non-development of<br />
the typical microfolds but just some flexural slips <strong>and</strong> some kink b<strong>and</strong>s. If it will supposed that both of the<br />
turbidite horizons where thin carbonate strata it's attached, will move up <strong>and</strong> down, the stress create a<br />
orientation when the shear stress acted as a b<strong>and</strong> <strong>and</strong> create the kink b<strong>and</strong>s.<br />
69
features with a NE-SW shortening direction. This structural interpretation can be further<br />
depicted from Figures 2b-c that show our interpretations of the Gondola <strong>and</strong> Grazia structures<br />
in the D438 <strong>and</strong> D452 profiles, respectively. The Gondola Ridge has been previously<br />
interpreted as a horst-like feature bordered to the north by a normal fault <strong>and</strong> with the SAB<br />
northern section as the down-faulted hanging wall (Alteriis <strong>and</strong> Aiello, 1993). Instead, we<br />
consider that the tilting <strong>and</strong> uplift of the Mesozoic basement <strong>and</strong> the Miocene-Pliocene cover<br />
are best explained by thrusting propagated along a decollement level at the Upper Triassic<br />
Burano salt layer. The Gondola Ridge in the western part of the SAB contains an elevated<br />
Mesozoic succession covered by only 300m thin Pliocene-Quaternary veneer, as documented<br />
by the Gondola Well located at the crest of the Ridge.<br />
Truncation of tilted isopach reflectors of Miocene strata by the Pliocene-Quaternary<br />
succession suggests that uplift of the Gondola Ridge <strong>and</strong> rotation of its southern flank must<br />
have occurred in the latest Miocene-earliest Pliocene time.<br />
Synthesis <strong>and</strong> conclusions<br />
Recognition of two distinct marine cliff facies at the escarpments upward from the 80m <strong>and</strong><br />
200m terraces make clear these peneplains were formed successively by marine abrasion. No<br />
evidence is found that the vertical slopes dividing the peneplains are normal fault<br />
escarpments. These field observations from the southern flank of the Gargano Promontory in<br />
conjunction with earlier work (Bertotti et al., 1999) oppose the commonly held perception of<br />
the GP as a flexural bulge. A bulge may display normal faulting from flexural fibre stresses,<br />
although such faulting would be expected to be subordinate to presumed large-wavelength<br />
antiformal tilting of the bedding. However, the escarpment that climbs from the 200m<br />
peneplain lacks such fault traces <strong>and</strong> instead a marine-erosive origin is evidenced with welldeveloped<br />
marine cliff-facies. Moreover, much short-wavelength west verging folding<br />
suggest substantial shortening with tilting best explained by fault-bend folding of (blind) west<br />
verging thrusting.<br />
Both the structural style <strong>and</strong> timing of vertical motions correlate well with the new<br />
interpretations from the offshore SAB seismic lines. Pliocene-Quaternary strata overly<br />
strongly tilted Mesozoic to Miocene rocks that were subject to Middle-Late Miocene<br />
contraction, resulting in several hundreds of meters of relative uplift. Also in the southern<br />
Gargano uplift <strong>and</strong> tilting of the substratum occurred by fault related folding due to NE-SW<br />
contraction during the middle Miocene to pre-Messinian time. This contrasts with earlier<br />
interpretations of Pleistocene uplift <strong>and</strong>/or a NE-SW tensional origin. Such an interpretation<br />
poses interesting kinematic problems with the adjacent Southern Adriatic Basin when their<br />
main structures are interpreted in the context of transtensional tectonics <strong>and</strong> without any<br />
major contractional structures reported for the SAB (Bertotti et al., 1999). Instead, with a<br />
reinterpretation of the Gondola Ridge, as dominant compressional feature in the SAB, a less<br />
isolated <strong>and</strong> regionally <strong>and</strong> kinematically much more univocal picture becomes apparent.<br />
References<br />
Alteriis, G., Aiello, G., 1993. Stratigraphy <strong>and</strong> tectonics offshore of Puglia (Italy, southern<br />
Adriatic Sea. Marine Geology 113: 233-253.<br />
Alteriis, G., 1995. Different forel<strong>and</strong> basins in Italy: examples from the central <strong>and</strong> southern<br />
Adriatic Sea. Tectonophysics 252: 349-373.<br />
Bertotti, G., Casolari, E. <strong>and</strong> Picotti, V., 1999. The Gargano Promontory: a Neogene<br />
contractional belt within the Adriatic plate. Terra Nova 11: 168-173.<br />
Casolari, E., Negri, A., Picotti, V. And Bertotti, G., 2000. Neogene Stratigraphy <strong>and</strong><br />
Sedimentology of the Gargano Promontory (Southern Italy). Eclogae geol. Helv. 93: 3-23.<br />
70
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
STRATIGRAPHY <strong>and</strong> LITHOLOGICAL COMPOSITION of the QUATERNARY<br />
SEDIMENTS in ALBANIA<br />
Jakup HOXHAJ, Fatbardha CARA<br />
Instituti i Gjeoshkencave, Universiteti Politeknik i Tiranës<br />
Hasan KULIÇI<br />
Shërbimi Gjeologjik Shqiptar<br />
Shehribane ABAZI<br />
Komsioni i Pavarur i Minierave dhe Mineraleve Kosove<br />
Contact: jakuph2001@yahoo.com<br />
Stratigraphy <strong>and</strong> lithofacial content of Quaternary deposits, along, the Albanide geological<br />
structure from the choice <strong>and</strong> from the very wide spread, is a very individual important in the<br />
context of the overall geological study. Thanks to these studies, especially those after 90të years,<br />
these deposits, are now more determined, in lithology, in genesis <strong>and</strong> in their age. The new<br />
deposits are Plio- Quaternary <strong>and</strong> Quaternary with clear stratigraphic position, which fill all near<br />
the Adriatic low l<strong>and</strong> interior, potholes <strong>and</strong> slopes of the end of their, glacial <strong>and</strong> the karstic<br />
relieve, also glacial lake depressions. In general, these are product of erosive are accumulative<br />
transformations of glacial activity, the water network as a whole, incline of the slopes,<br />
anthropogenic activity, so climate transformations in the territories with slowly neotectonic<br />
activity.<br />
In the determination of their age, for the specifics they have besides the classical methods <strong>and</strong><br />
relativity, are applied the new <strong>and</strong> specific methods of the different types, according to the<br />
modern experiences.<br />
The global tectonic lead to investigation relate to the favorable zones for the forming of a<br />
sedimentary basement, also the ways about its evolution.<br />
There are differenced 5 main levels of the terraces with relative elevation respectively: 10-20m,<br />
30-45m, 60-80 m, 90-100 m <strong>and</strong> 120-130 m, which have the development <strong>and</strong> are saved well in<br />
the middle flows of the rivers, especially in the right side of them. This is explained, as the<br />
general factors (planetary), also with local factors as are: the different intensity of the tectonic<br />
movements owing to the different order of the geological structures <strong>and</strong> the no same<br />
development of the water net in two sides of the valley.<br />
The river terraces, are consider of the tectonic <strong>and</strong> climatic character, where during a climatic<br />
cycle (glacier, interglacial), is formed a river terrace. The forming of the river terraces is made,<br />
mainly during the glacial periods, while, the forming of cones of the output (alluvions) which are<br />
superposed everywhere on terraces, must to be done in the end of these epochs, in the fazes of<br />
the glacier rapid melting. In this time must to be formed <strong>and</strong> the barriers, whose footprints there<br />
are, almost in all levels. The section of the terraces (their stairs) must to be done during the<br />
71
interglacial epochs, on which the rivers must to have had big amount of the water <strong>and</strong> so, must to<br />
be grown the their abrasive power.<br />
It is clear, that in this forming have influenced <strong>and</strong> the presence of the elevator movements.<br />
According to mainly, geomorphologic character we have: today Quaternary depositions (where<br />
are included the bed depositions, the gritty earth of the rivers <strong>and</strong> today alluvial fields), the upper<br />
Pleistocene depositions (the deposition of the firs terrace level), the middle Pliocene depositions<br />
(the depositions which construct the second level of the terraces), the deposition of the lower<br />
Pliocene (deposition which construct the second <strong>and</strong> third level of the terraces), the Plio-<br />
Pleistocene depositions (river <strong>and</strong> lake facies).<br />
The age division, are supported in the fact of the paleogeographic development, after three main<br />
sedimentary fazes: the lake faze (lower-middle <strong>and</strong> partly upper Pleistocene), the river faze<br />
(lower-middle-upper Pleistocene included <strong>and</strong> Holocene). The fact of the river depositions<br />
placement (terraces) up to deposition of the lake-river facies less deformed from the Vallahe<br />
folding.<br />
The strong turns as like as elbow in southern-western direction what the Devolli river gets in<br />
Gostima of Elbasan <strong>and</strong> Vjosa river in Kelcyra, happen from the presence of a lake in Elbasani–<br />
Cerrik region, in Quaternary period, with the elongate as a tongue in Mollas- Selite direction.<br />
So the Devolli River, during Quaternary is poured in this lake <strong>and</strong> only in the end of Pleistocene<br />
or in the beginning of the Holocene has got the turn to southwest, while the Kelcyra neckb<strong>and</strong> is<br />
formed in a antecedence, so, the Vjosa River, during Quaternary has crossed in the way, in today<br />
direction.<br />
After geo-geomopholocical features, the walleyes of the Albanian rivers have favorable<br />
conditions for the constructing of the hydropower works, also after these conditions <strong>and</strong> results<br />
from complex works, has the premise for the placers.<br />
The alluvial depositions, almost the all kinds, have water- bearing capacity, with very importance<br />
for the water-drinking industry.<br />
72
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SUBSALT DEPTH SEISMIC IMAGERY <strong>and</strong> STRUCTURAL INTERPRETATION in<br />
the DUMRE AREA, ALBANIE<br />
Anne JARDIN*, Luan NIKOLLA** <strong>and</strong> François ROURE*<br />
*IFP Energies Nouvelles, Rueil-Malmaison, France<br />
**National Agency, Albania<br />
Anne.Jardin@ifpenergiesnouvelles.fr<br />
The challenge of seismic exploration in fold <strong>and</strong> thrust belt setting is to optimize the depth<br />
seismic images of the deep structural objectives underneath complex overburden that may<br />
show strong horizontal <strong>and</strong> vertical velocity variations. In such areas, the seismic image is<br />
frequently of poor quality <strong>and</strong> the depth evaluation of deep layers is often false due to the<br />
perturbed propagation of seismic energy through the deforming lens of the overlying layers. A<br />
range of seismic processing tools, including post-stack <strong>and</strong> pre-stack depth migrations, are<br />
appropriate to estimate the accurate geometry of deep target structures <strong>and</strong> to improve the<br />
building of a depth structural model in this context.<br />
A strong combination of geological reasoning <strong>and</strong> depth seismic imaging processing can<br />
improve the underst<strong>and</strong>ing of the deep geological structures by reducing the uncertainties in<br />
depth geometrical <strong>and</strong> velocity model estimation. We propose an interpretative <strong>and</strong> iterative<br />
approach to the post stack depth migration method to guide the interpreter in the elaboration<br />
of a reliable subsurface model.<br />
We have applied this approach during an exploration study in the Dumre area, located in the<br />
Ionian Basin (Albania) which is a complex fold <strong>and</strong> thrust belt. The main objectives of this<br />
study were to underst<strong>and</strong> the failure of a former exploration well <strong>and</strong> to propose a new<br />
location for the potential closure of the carbonate structure. This subsalt imaging study aims at<br />
illustrating the improvements obtained by application of this integrated seismic imaging<br />
method especially in the evaluation of a subthrust prospect in a tectonically complex belt<br />
setting.<br />
73
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
GPS CONSTRAINS on CUURENT TECTONICS of ALBANIA<br />
François JOUANNE (1), Jen-Louis MUGNIER (1), Rexhep KOCI (3), S. BUSHATI<br />
(2) , K. MATEV (1, 5), N. KUKA (3), I. SHIVIKO (3), M. PASHA (4), S KOCIU (6)<br />
(1) LGCA UMR CNRS 5025, Université de Savoie<br />
(2) Academy of Sciences of Albania<br />
(3) Institute of Geosciences of the polytechnical University of Tirana, Albania<br />
(4) Military Geographical Institute of Albania<br />
(5) Laboratory of Geodesy, Academy of Sciences of Bulgaria.<br />
(6) Professor on leave from Institute of Seismology of the Academy of Sciences of<br />
Albania, now 4631 N Lowell Avenue #E2, Chicago, Il 60630, U.S.A<br />
Current tectonics of Albania is documented by neotectonics indices <strong>and</strong> by a large<br />
number of medium size earthquakes. Focal mechanisms suggest the existence of current<br />
shortening across the external Albanides whereas internal Albanides are affected by E-W<br />
to N-S extension. To investigate the kinematics of Albanides, we integrate continuous<br />
<strong>and</strong> episodic GPS measurements with focal mechanisms of the Regional Centroid<br />
Moment Tensor catalogue. This study has allowed distinguishing a western Albania<br />
affected by westward motions relative to Apulia microplate, illustrating the ongoing<br />
collision of external Albanides, whereas inner Albanides present southward motion,<br />
increasing from north to south, relative to both Apulia <strong>and</strong> stable Eurasia. Active thrusts<br />
<strong>and</strong> backthrusts of external Albanides are segmented by strike-slip faults, the Llogara<br />
pass fault between the external Albanides <strong>and</strong> the Ionian zone appears to be particularly<br />
active (5mm/year). The Shkoder-Peja Fault Zone, between Dinarides <strong>and</strong> Albanides, is<br />
identified as the probable northern limit of an area including Albania <strong>and</strong> western Greece,<br />
affected by a clockwise rotation relative to Apulia <strong>and</strong> also the northern limit of the<br />
Balkan (inner Albanides, Macedonia, Bulgaria) affected by southward motion relative to<br />
Apulia <strong>and</strong> stable Eurasia. The other transverse fault zone, the Diber-Elbasani fault,<br />
appears to be mainly affected by a moderate extension. Compilation of published GPS<br />
data with our data set allow to identify the external-inner Albanides limit as the western<br />
border of the domain (inner Albania, northern Greece, Macedonia, Bulgaria) affected by<br />
southward displacements relative to stable Eurasia, whereas Shkoder-Peja fault form<br />
probably its northern limit.<br />
75
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SEISMIC SEQUENCES in DIBRA REGION (ALBANIA)<br />
<strong>and</strong><br />
IMPLICATIONS for the SEISMIC HAZARD of the REGION<br />
Anastasia A. KIRATZI<br />
Department of Geophysics, Aristotle University of Thessaloniki, 54124,<br />
Thessaloniki, Greece (email: kiratzi@geo.auth.gr)<br />
The Albanian orogen belt, a segment of the Dinarides-Hellenides orogen, trends NNW-<br />
SSE <strong>and</strong> was developed by Alpine orogen processes related to the Apulia <strong>and</strong> Eurasia<br />
convergence <strong>and</strong> the closure of the Mesozoic Tethyan Ocean. The Dibra region,<br />
located in the eastern section of the Albanian orogen, near the borders with Fyrom, has<br />
been the location of intense seismic activity in recent instrumental times. A strong<br />
earthquake occurred on 30 November 1967 (GMT 07:23:50; Mw6.2; 41.41 ° N 20.44 ° E;<br />
h=9 km), which caused 19 deaths, 214 injuries <strong>and</strong> was associated with a N40 o E ~10<br />
km discontinuous or eroded surface rupture <strong>and</strong> 50 cm of vertical displacement. More<br />
recently, on 6 September 2009 (GMT 21:49) a moderate Mw5.4 earthquake sequence<br />
burst with its mainshock located ~6 km north of the 1967 epicenter at a distance of ~55<br />
km ENE from Tirana <strong>and</strong> ~25 km south of Peshkopie. This sequence was rich in<br />
aftershocks, the strongest of which occurred on 12 September 2009 Mw4.1<br />
(GMT18:42). The strongest events of the sequence were adequately recorded by the<br />
regional seismological networks of Albania, Greece <strong>and</strong> Fyrom. The neotectonic faults<br />
in the broader region are high-angle normal faults that have variable trends, N-S or<br />
NNE-SSW or NNW-SSE as this is manifested both in the earthquake focal<br />
mechanisms (Fig. 1) <strong>and</strong> the geomorphology.<br />
Here we study the 2009 sequence using broad b<strong>and</strong> waveforms recorded by the<br />
Hellenic Unified Seismic Network (HUSN), which receives real-time waveforms from<br />
the neighbouring networks, to compute focal mechanisms, obtain the slip model <strong>and</strong><br />
derive the shakeMap of the mainshock. The focal mechanisms of 18 of the stronger<br />
events of the sequence, obtained through time-domain moment tensor inversion,<br />
indicate that deformation is taken up by NNE-SSW trending normal faulting, in<br />
Kiratzi (2010). ILP Conference-Albania<br />
77
agreement with the ~E-W extension previously identified within the Albanian orogen.<br />
Our results show that the 2009 mainshock ruptured a roughly 9 km normal fault at a<br />
depth of 6km, which strikes ~N194 ° E <strong>and</strong> dips with an angle of ~45 ° to the west. The<br />
slip of the mainshock was confined in a single patch of ~9 km × 6 km, the average slip<br />
was 5 cm <strong>and</strong> the peak slip was 18 cm.<br />
Kiratzi (2010). ILP Conference-Albania<br />
Figure 1: Fault plane<br />
solutions for earthquakes<br />
with Mw>5.0 in Albania<br />
<strong>and</strong> neighbouring<br />
countries together with<br />
the 2009 Dibra events<br />
studied here. Note the<br />
nearly N-S trending faults<br />
(beach-balls depicted with<br />
light green) along the<br />
Albania orogen that take<br />
up deformation by nearly<br />
E-W extension.<br />
The slip model was incorporated in a forward modelling scheme to simulate the ground<br />
motion distribution in the near field. The shakeMap (Fig. 2) obtained from the<br />
distribution of Peak Ground Velocity at phantom stations depicts the mezoseismal area<br />
within the Dibra <strong>and</strong> Bulqiza districts in Albania, in accordance with macroseismic<br />
observations. The region of occurrence of the 2009 sequence together with the<br />
seismogenic region of the 1967 Dibra event, form a roughly NNE-SSW trending<br />
78
structure which is an active seismotectonic zone in eastern Albania constituting a threat<br />
for the near urban areas.<br />
Keywords: earthquake, Dibra earthquake, slip model, shakeMap<br />
Kiratzi (2010). ILP Conference-Albania<br />
79<br />
Figure 2: Distribution of Peak<br />
Ground Velocity (ShakeMap) for<br />
the 2009 Dibra Mw5.3<br />
earthquake depicting the regions<br />
most affected by the earthquake.
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
RIVER TERRACES <strong>and</strong> their AGE DETERMINATION in ALBANIA<br />
Rexhep KOCI 1 , Agim MESONJESI 2 , Jean-Louis MUGNIER 3 , François JOUANNE 3 ,<br />
Julien CARCAILLET 3 Oswaldo GUZMAN 3<br />
1 Institute of Geosciences, Tiranë, Albania,<br />
2 DWM Petroleum A.G., Tiranë, Albania,<br />
3 Universitë de Savoie, LGCA UMR 5025<br />
�<br />
The Quaternary deposits are widely spread in Albania. These deposits fill all the Peri-adriatic<br />
basin of western Albania from Kopliku in the north to Vlora in the south. They are also<br />
fragmentary encountered in other parts of Albania like in Tropoja, Kukës, Peshkopi, Korça,<br />
Devolli, Kolonja, Xarë-Butrint depressions (Aliaj et al. 1996).<br />
The Quaternary deposits of the river valleys are represented by the sediments of the river<br />
terraces. From the lithological point of view, they are represented by coarse gravel sediments.<br />
There are identified in some levels of quaternary river terraces along the river valleys in Albania,<br />
which create an escalation view of the valleys itself.<br />
The river terraces, from the geomorphologic viewpoint, are the most beautiful views that can be<br />
seen along the river valleys <strong>and</strong> have been for a long time a study object for the geologists <strong>and</strong><br />
geomorphologists.<br />
Their formation is closely linked with the periodical changes of the erosion <strong>and</strong> accumulative<br />
processes of the rivers as a function of both climatic changes <strong>and</strong> the character of the tectonic<br />
movements. This phenomena is clearly seen along the valley of Erzeni river, in Mullet-Shijak<br />
sector, where the river flow between two tectonic faults.<br />
Interactions of the tectonic development <strong>and</strong> climate agents have generated a double contribution<br />
to the river valleys shaping process. So, frequent tectonic movements have brought about<br />
formation of some terraces (Koçi 2005, Koçi et al, 2009), while, the speed of territory rise has<br />
determined the high between terrace levels. Meanwhile, heavy raining climate developed<br />
intensive erosion <strong>and</strong> produced great amount of coarse material transported by streams <strong>and</strong><br />
rivers. These phenomena have occurred along the Shkumbini, Devolli, Osumi <strong>and</strong> Vjosa river<br />
valleys, where they cross external Albanides of the Ionian <strong>and</strong> Kruja zones, which have<br />
undergone almost constant speed rise <strong>and</strong> formation of the same number of terraces during the<br />
Plio-Quaternary. Also, the high between terrace levels of these rivers have been of the same<br />
order of magnitude. So, there are detected highs of 10-15m between the youngest terrace levels<br />
(fig 2) to 120-30m between the old terrace levels, except the case of the Devolli river, which<br />
have the oldest level high of 364 m (fig.3).<br />
81
Neo-tectonic role on formation of terrace levels is more obvious along the Erzeni river valley,<br />
which cross the Tirana depression <strong>and</strong> Durresi syncline separated by the Preza monocline (fig 1).<br />
Field surveys along the valley in question have identified three terrace levels across the Tirana<br />
Depression segment, whereas in the west of the Preza monocline there are described six terrace<br />
levels (Koçi. 2005, Koçi et al. 2009) (fig. 2).<br />
Fig 1:�Geoseismic profile accross the Tirana<br />
syncline <strong>and</strong> Preza monocline. Fig 2: Schematic cross-section on the<br />
medium flow of the Erzeni River.<br />
This drastic change of the number of the Erzen terrace levels between east <strong>and</strong> west of the Preza<br />
monocline resulted as a consequence of different values of the rise <strong>and</strong> fall speed between the<br />
cited segments.<br />
The formation <strong>and</strong> development of the river valleys <strong>and</strong> the river networks is related first of all<br />
with the geology <strong>and</strong> tectonic construction of the area where the rivers flow, as well as with the<br />
paleogeographic evolution of those areas. On the other h<strong>and</strong>, the formation of the terrace systems<br />
along the river valleys result from the combine of the geologic-tectonic, neotectonic <strong>and</strong> climatic<br />
factors since the beginning of the Quaternary, which were more intensive at the beginning of the<br />
Middle Pleistocene-Holocene time <strong>and</strong> continuous even today (Prifti K. 1990& Koçi R. 2005,<br />
2008)<br />
There are documented six river terraces up to now along the river valleys of our country. They<br />
are usually encountered in the middle segment of the flow <strong>and</strong> rarely in the upper segment of the<br />
flow. The deposits of the terraces in both of those segments have a sporadic spreading. Their<br />
correlation along the stream direction is usually difficult. The deposits of the terraces are usually<br />
encountered in one side of the river valley but in some cases they are encountered in both sides<br />
of the valleys (Photo 1&2, Fig. 3&4).<br />
Our 2002-2007 study present the identification in the field of the river terraces along the Erzeni,<br />
Devolli, Osumi <strong>and</strong> Vjosa valleys. A considerable number of samples were gathered in the field<br />
<strong>and</strong> analyzed for age determinations. Carbon 14 ( 14 C) as well as the Cosmonucloid concentration<br />
of Beryllium 10 ( 10 Be) method were used for age determination. The method of Beryllium 10<br />
( 10 Be) was used for the first time for geomorphologic determinations. The field study<br />
82
documented six terrace levels in the Erzeni <strong>and</strong> Devolli rivers as well as five levels in the Osumi<br />
(Carcaillet et al, 2009) <strong>and</strong> Vjosa valleys. In the upper flow of Vjosa river, in Greece territory,<br />
there are described four terraces, respectively 1000 years old for the youngest one <strong>and</strong> 150000<br />
years for the oldest (Lewin, J. 1989). The height of the terrace levels from the river water varies<br />
from 0 to 364 meters. The highest level is documented in the Devolli valley. It is located in<br />
Sk<strong>and</strong>erbeg village at 364 meters from the water level of the river (fig. 3).<br />
Photo 1: View of some river terraces of the medium<br />
flow in the Devoll River. �<br />
Fig 3: Schematic cross-section of the<br />
medium flow of the Devoll River.�<br />
As for the age determination, here is what resulted using both the upper mentioned methods:<br />
from 200 years for youngest level up to more than 250 000 years for the oldest one. The<br />
youngest level is documented in the Erzeni valley while the oldest one in the valley of Devolli<br />
river.<br />
Fig. 4: (A) Panoramic view of the lower Osum showing the location of terraces units. (B) Cross section through the<br />
lower Osum, upstream of Berat (C) Geomorphologic map of the lower Osum, upstream of Berat. (D)<br />
83
Incision (m) versus ages of terrace units (ka) Breks on slope are materialized by the vertical dashed grey<br />
lines (J. Carcaillet et al, 2009).<br />
Based on age determinations for each level <strong>and</strong> their height from the river bed we found that the<br />
average lifting have been from 0.5 mm to 10 mm per year. Comparing the available data for the<br />
terrace deposits of the river valleys in Albania with those of Mediterranean area, it is concluded<br />
that it is a good respective correlation between the terrace units <strong>and</strong> their ages (Table 1, after<br />
M.G. Macklin, 2001). The data show that neotectonic movements, which affected our country<br />
territory during Pliocene <strong>and</strong> Quaternary period, have been of the same time with those of<br />
Mediterranean area.<br />
References<br />
Table 1: Age data from some rivers of Mediterranean are (after M.G. Macklin et al,<br />
2001).�<br />
Aliaj, Sh., Melo, V., Hyseni, A., Skrami, J., Mëhillka, Ll. Muço, B., Sulstarova, E., Prifti, K.,<br />
Pashko, P., Prillo, S., 1996. Neo-tectonic map of Albania, scale 1: 200000. Archive of<br />
seismology Institute, Tirana, Albania.<br />
Carcaillet J., J.L. Mugnier, R. Koçi, F. Jouanne, 2009. Uplift <strong>and</strong> active tectonics of Albania<br />
from incision of alluvial tarraces. Quaternary Research 71 (2009) 465-476.<br />
Koçi, R., 2005. Neo-tectonic of Tirana-Durres area <strong>and</strong> its role on the terraces formation of<br />
Erzeni river.Archive of seismology Institute, Tirana, Albania.<br />
Koçi, R., 2008. Doctorate thesis: Expression of the neo-tectonic movements in terraces of some<br />
rivers of Albania. Archive of seismology Institute, Tirana, Albania.<br />
84
Koçi R., S Bushati, J.L. Mugnier, E. Perenjesi, 2009. The river tarraces-indicators of the<br />
neotectonic movements in Albania. 5th Congress of Balkan Geophysical Society. Belgrade,<br />
Serbia.<br />
Lewin, J, Macklin, G. M., Woodward, D. J., 1989. Late Quaternary fluvial sedimentation in<br />
Voidomatis Basin Epiris, northwest Greece. The Godwin Laboratory, Sub department of<br />
Quaternary Research, University of Cambridge CB2 3RS, UK.<br />
Macklin M.G., I.C. Fuller, J. Lewin, D.G. Passmore, J. Rose, J.C. Woodward, S. Black, R.H.B.<br />
Hamlin, J.S. Rowan, 2001. Correlation of fluvial sequences in the Mediterranean basin<br />
over the last 200 ka <strong>and</strong> their relationship to climate change. Quaternary Science Reviews<br />
2, 1633-1641.<br />
Prifti, K, Meçaj. N., 1990. Geomorphologic development of river valleys in Albania <strong>and</strong> their<br />
practice importance. Geographic Studies, Nr. 4, Tirana, Albania.<br />
85
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
From PALEOSTRESSES to PALEOBURIAL in FOLD-THRUST BELTS:<br />
PRELIMINARY RESULTS from CALCITE TWIN ANALYSIS in the OUTER<br />
ALBANIDES<br />
(SARANDA-KREMENARA ANTICLINES, IONIAN ZONE)<br />
Olivier LACOMBE (1), Nadège VILASI (2) <strong>and</strong> François ROURE (3)<br />
(1) Université Pierre & Marie Curie- Paris 6, ISTeP, Paris, France<br />
(2) Statoil, Norvège<br />
(3) IFP Energies Nouvelles, Division Géologie-Géochimie-Géophysique, Rueil-<br />
Malmaison, France<br />
This paper presents a first application of a new method to constrain paleoburial <strong>and</strong><br />
subsequent uplift by folding in fold-thrust belts based on calcite twinning to folded late<br />
Cretaceous limestones from the Ionian zone in Albania. Our approach basically combines<br />
differential stress estimates from mechanically-induced calcite twins with the assumption that<br />
stress in the upper crust is in frictional equilibrium.<br />
Calcite twin data were collected from prefolding veins in late Cretaceous limestones from the<br />
Ionian zone in Albania in order to (1) determine Paleogene-Neogene stresses associated with<br />
the development of the major vein sets in the frontal anticlines of the outer Albanides <strong>and</strong> (2)<br />
estimate paleoburial of the Cretaceous reservoir rocks during pre-folding flexural subsidence<br />
of the forel<strong>and</strong>. The first vein set (set I) trends N140 (+/- 20) <strong>and</strong> the second set (set II) is<br />
oriented N060 (+/-20). Calcite twinning analysis from set I veins reveals a prefolding N030°<br />
extension likely related to forel<strong>and</strong> flexure; a later prefolding, NE-directed compression (LPS)<br />
is identified either from one or from both vein sets in the samples from the Sar<strong>and</strong>a anticline;<br />
this NE compression is instead recorded by twinning in set II veins from the Kremenara<br />
anticline during late stage fold tightening. This NE compression well agrees with independent<br />
microtectonic data, regional transport direction <strong>and</strong> contemporary stress.<br />
The differential stress values related to this NE compression are combined with the hypothesis<br />
of crustal frictional stress equilibrium to derive first-order estimates of paleoburial of the<br />
Cretaceous limestones just before they were uplifted by folding. The 4 km paleoburial of<br />
these limestones estimated in the Sar<strong>and</strong>a anticline is consistent with independent paleoburial<br />
estimates from stratigraphy, maturity rank of organic matter, paleotemperature<br />
/paleogeothermal gradients from fluid inclusions <strong>and</strong> predictions of kinematic modelling of<br />
the Albanian forel<strong>and</strong>. Our results therefore place reliable constraints on the amount <strong>and</strong> rate<br />
of vertical uplift of these Cretaceous limestones <strong>and</strong> yield a promising methodology for better<br />
constraining paleoburial <strong>and</strong> therefore erosion <strong>and</strong> uplift in fold-thrust belts.<br />
87
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
IDENTIFICATION of the NEOTECTONIC MOVEMENTS through<br />
GEOPHYSICAL METHODS in the BASIN OF ELBASAN<br />
Piro LEKA 1 , Petrika KOSHO 1 , Petraq NACO 2 , Fatbardha VINCANI 1<br />
1<br />
Department of Geophysics <strong>and</strong> Georisk, Institute of Geosciences, UPT.<br />
e-mail: p.leka@yahoo.com<br />
2<br />
Department of Georesources <strong>and</strong> Geoengineering, Institute of Geosciences, UPT.<br />
Elbasani’s Aquifer Basin represents one of the largest water resources of Albania. Its aquifer<br />
potential is conditioned by the development of extensional neotectonic system, related with<br />
early transversal fault of Vlorë - Ebasan - Dibër <strong>and</strong> its neotectonic regimes (Fig.1).<br />
41°N<br />
Albania<br />
TIRANA<br />
Cerriku<br />
Devoll's River<br />
20°E<br />
1<br />
Shkumbin's River<br />
2<br />
A<br />
Elbasani<br />
Elbasan's Aquifer<br />
Basin<br />
1<br />
B<br />
2<br />
3 3<br />
0 2 4 km<br />
Legend<br />
Quaternary depositions<br />
Transversal fault of Vlorë-Elbasan-Dibër<br />
Evaporite diapir of Dumrea<br />
Ionian's <strong>and</strong> Kruja's tectonic zones<br />
Tectonic sub-zone of Krasta<br />
Tectonic zone of Mirdita<br />
A- B Seismic profile<br />
1-1 Profile of Vidhas-Gjergjan<br />
2-2 Profile of Muriqan-Jagodine<br />
3-3 Profile Kraste-Shushice<br />
Fig. 1 Geotectonic position of the Aquifer Basin of Elbasani with the seismic<br />
<strong>and</strong> electrometric profils<br />
This basin is characterized by three important objects:<br />
� Aquifer basin of Quaternary depositions, which related with gravel terraces of<br />
Shkumbin’s river <strong>and</strong> represents one of the more potential drinking water resources of<br />
this region.<br />
89
� Aquifer basin of Mirdita’s zone, which related with Triassic limestones <strong>and</strong><br />
extensional tectonic regime <strong>and</strong> presented evidently by surface sources.<br />
� Aquifer basin of Krasta’s zone, which related with Turonian - Maastrichtian<br />
limestones <strong>and</strong> extensional neotectonic regime, which resources drain into fluvial<br />
formations <strong>and</strong> into Shkumbin’s River bottom.<br />
Region Labinot - Fushë - Elbasan - Cërrik, at conditions of continued subsidence has incurred<br />
successive burying of fluvial terraces, creating the necessary conditions for the sedimentation<br />
of the thick gravel horizon.<br />
Waterbearing layer is in discordance above Ionian’s, Kruja’s, Krasta’s <strong>and</strong> Mirdita’s<br />
neotectonic zones with neotectonic system of faults, characterized with potential hydrological<br />
parameters.<br />
In this region, other waterbearing layers are carbonates of Mirdita’s tectonic zone of sub-zone<br />
Krasta, represented in depth with extensional neotectonic regime, which serve at once like<br />
drained planes of potential aquifer resources.<br />
Obtained data from the interpretation of seismic profile have helped in the conception of<br />
geotectonic model of Elbasan’s water basin. In such conditions is formed graben or<br />
cumulative depression of Elbasan, also expressed through seismic facies 0.6 to 0.2 sec<br />
(Fig. 2).<br />
Uplifting tectonic regime<br />
Direction of evaporite flow<br />
Normal fault<br />
Overthrust fault<br />
Applied drilling for oil<br />
Study region<br />
Fig. 2: Seismic Profil carried out in the N-S orientation on Aquifer Basin of Elbasani.<br />
For aquifer research that related with waterbearing horizons above is used the method of<br />
Electrometric resistivity, with array of electrical sounding -Schlumberger, AB/2 = 500 m.<br />
For modeling of the structure of Elbasani gravel basin in striking <strong>and</strong> in depth are carried out<br />
two profile (Vidhasi-Gjergjan, Muriqan-Jagodinë), but for separation of complex aquifer<br />
setting, that related with extensional neotectonic regime, is carried out one profile (Kraste -<br />
Shushice).<br />
Geoelectrical image 2–D of gravel horizon, with neotectonic system of faults is characterized<br />
complicated for the profile 1-1 “Vidhas - Gjergjan”. The third layer presents interest with<br />
values of electrical resistivity from 200 until 500 Ohmm, thickness from 7 until 200 m that<br />
presents the gravels, creating graben structure in the central part of this profile due to the<br />
normal slides situated with neotectonic system of faults in the valley of Shkumbini’s River<br />
time to time (Fig. 3).<br />
90
D e p t h (m)<br />
D e p t h (m)<br />
NW<br />
Shkumbin's River<br />
VES-1<br />
D-10A<br />
VES-2<br />
D-4A<br />
VES-3<br />
VES- 4<br />
D-3A D-4<br />
VES-5 VES-6 VES-7 VES-8 VES-9<br />
50<br />
0<br />
84 140<br />
900<br />
420 280<br />
230<br />
135<br />
53<br />
-50<br />
24<br />
38<br />
140 280<br />
63<br />
200<br />
90<br />
-100<br />
0 100 200 300 400 500 600 700<br />
D i s t a n c e (m)<br />
10 - 20 ohmm - Alevrolite - clay<br />
20 - 40 ohmm - Clay - s<strong>and</strong><br />
40 - 90 ohmm - S<strong>and</strong> - clay<br />
VES-1 VES-2 VES-3<br />
D-10A D-4A D-3A<br />
VES- 4 VES-5 VES-6 VES-7 VES-8 VES-9<br />
D-4<br />
50<br />
0<br />
-50<br />
-100<br />
-150<br />
-200<br />
0 100 200 300 400 500 600 700<br />
D i s t a n c e (m)<br />
L e g e n d<br />
90 - 140 ohmm - S<strong>and</strong>, alevrolite<br />
140 - 200 ohmm -S<strong>and</strong><br />
200 - 300 ohmm - Gravel<br />
D-4<br />
300 - 500 ohmm - Coarse-grained gravel<br />
Tectonic<br />
Applied drilling<br />
VES-1<br />
Applied VES<br />
Fig. 3: Geological - geophysical cross-section after VES carried out in<br />
the Profile 1-1 Vidhas - Gjergjan.<br />
Geoelectrical image 2-D of waterbearing layer for the profile 3-3 “Krastë - Shushicë” related<br />
with extensional neotectonic regime, is generally characterized with quasi-horizontal view of<br />
geoelectrical layers, in the upper part of geoelectrical section, <strong>and</strong> with the variation of<br />
electrical resistivity values <strong>and</strong> of thickness in the its lower part, in direction W-E (Fig. 4).<br />
The separation of geoelectrical layers of Mirdita’s zone with sub-zone Krasta <strong>and</strong> aftermost<br />
with Kruja’s zone represents the extensional neotectonics of these zones with different dip<br />
from the upper part to the depth. The planes of extensional neotectonics are main<br />
hydrogeological possible environmental of drinking supply for Ebasan city.<br />
91
D e p t h (m)<br />
D e p t h (m)<br />
100<br />
50<br />
0<br />
45<br />
4<br />
45<br />
-50 0<br />
W<br />
D-11<br />
VES-1 VES-2<br />
65<br />
7<br />
32<br />
110<br />
D-11<br />
VES-1 VES-2<br />
100<br />
50<br />
0<br />
0-10 ohmm - S<strong>and</strong><br />
VES-3 VES-4<br />
D-3-A<br />
80<br />
19<br />
36<br />
70<br />
30<br />
50 80<br />
10-20 ohmm - Clay - alevrolite<br />
20-30 ohmm - Breccia, gravel<br />
VES-5<br />
30<br />
Shkumbin's River<br />
52<br />
VES-6 VES-7<br />
100 32<br />
70<br />
14<br />
28<br />
500 1000 1500 2000 2500 3000 3500<br />
D i s t a n c e (m)<br />
D-3-A<br />
VES-3 VES-4<br />
VES-5<br />
30<br />
VES-6<br />
L e g e n d<br />
15<br />
52<br />
VES-7<br />
VES-8<br />
20<br />
30<br />
200 190<br />
-50<br />
0 500 1000 1500 2000 2500 3000 3500<br />
D i s t a n c e (m)<br />
30-50 ohmm - Clay - alevrolite - s<strong>and</strong><br />
50-100 ohmm - Gravel<br />
VES-8<br />
100-200 ohmm - Carsted limstone<br />
E<br />
VES-9 VES-10<br />
VES-9<br />
23<br />
70<br />
VES-10<br />
D-11<br />
VES-1<br />
Tectonic<br />
Applied drilling<br />
Applied VES<br />
Fig. 4: Geological - geophysical cross-section after VES carried out in<br />
the Profile 3-3 Krastë - Shushicë.<br />
Conclusions<br />
1. Drillings Kozani-8, Papri-1, Maraku-1 have proved neotectonic regime of geological<br />
setting of Elbasn’s water basin, interpreted after seismic profile.<br />
2. Gravel horizon interpreted after VES in cross-section profile of Vidhas - Gjergjan<br />
results fragmented with normal faults <strong>and</strong> thickness of depositions that vary from 7<br />
until 200 m.<br />
3. Geoelectrical environments with variation of apparent electraical resistivity values<br />
after cross-section profile of Krastë - Shushicë represents neotectonic planes of<br />
overthrusting faults of Mirdita’s zone on sub-zone Krasta <strong>and</strong> Krasta’s zone on<br />
Kruja’s zone.<br />
References<br />
Melo V., 1961. Review of neotectonic movement in building of Shkumbini’s terraces in<br />
Elbasan -Paper sector. Geological Sciences Bulletin No. 1, Tirana.<br />
Naço P., Kodra A., Çina A., Bedini E., 2005. Active tectonics evaporites <strong>and</strong> permanent<br />
seismicity of Elbasani area. Albania 14 th Meeting of the Association of European<br />
Geological Society. Torino, Italy, September, 2005.<br />
Naço P., Bedini E., Leka P., 2006. The Aquifer Basin of Elbasani, tectonic-forming<br />
conditions <strong>and</strong> the problems of its management. Geological Sciences Bulletin Nr. 1,<br />
47-57, Tirana.<br />
Naço P., Bedini E., Leka P., 2006. Searching for hydrocarbons under large tectonic<br />
overthrusts of Albanides. Geological Sciences Bulletin No. 2, 33-42, Tirana.<br />
Leka P., Naço P., Vinçani F., Bedini E., 2007. Qualificative evaluation of Elbasani’s aquifer<br />
basin through Schlumberger electrical Soundings. Geological Sciences Bulletin Nr. 2,<br />
47-56, Tirana.<br />
92
Abstract<br />
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
Environment impact of closed copper mine in Rehova<br />
Skender Lipo<br />
Faculty of Geology <strong>and</strong> Mining, Tirana Albania<br />
Edmond Hoxha<br />
Faculty of Geology <strong>and</strong> Mining, Tirana, Albania<br />
In our country there are more than 30 closed mines that cause environmental pollution<br />
constantly beside them. One of them is the Rehova copper mine, closed 15 years ago,<br />
which continues to be a source of pollution <strong>and</strong> risks to the environment <strong>and</strong> population<br />
of this area.<br />
Waters going out from mine workings <strong>and</strong> the dump of the mineral<br />
processing plant are mixed with water flowing in Lubonja stream bringing its ongoing<br />
pollution, especially in the periods of intensive rainfall.<br />
The opencast mine stairs collapse leads to the expansion of their borders,<br />
destroying forests <strong>and</strong> pasture l<strong>and</strong>s near the opencast area. The collapse of underground<br />
mining works not only damages constantly the surface of the new agricultural l<strong>and</strong>, but is<br />
also a danger to people <strong>and</strong> livestock moving in this area.<br />
Large areas occupied from the opencast works are surfaces that need to be<br />
regenerated <strong>and</strong> turn back on forest <strong>and</strong> pasture.<br />
The wastes resulting from the enrichment of copper ore, has occupied a<br />
considerable area of l<strong>and</strong>, <strong>and</strong> they pollute the waters passing through the waste mass.<br />
From the other side the breaks of the damp slopes risks to cause the slide of this waste<br />
mass over the road <strong>and</strong> agricultural l<strong>and</strong>s nearby.<br />
The subject of this article is the assessment of the mentioned above phenomena<br />
<strong>and</strong> bringing of some thoughts on minimizing the damage to the environment.<br />
Reference<br />
� B. Shushku, E. Goskolli, 2009, Emergence risk situation <strong>and</strong> risk reduction at four<br />
Albanian tailing dams. 3 rd Balkan Mining Congress. Izmir, Turkey.<br />
� Lipo S., Kuka R., <strong>and</strong> al. 2007. Assessment of surface subsidence impacted from<br />
mining activity in coal mine Mezes. Geology <strong>and</strong> Mining Faculty, Tirana,<br />
Albania.<br />
� E. Hoxha, S. Lipo. 2005, Damage of infrastructure objects <strong>and</strong> agriculture<br />
production from mining activity at Rehova copper Mine. Faculty of Geology <strong>and</strong><br />
Mining, Tirana, Albania.<br />
93
� Serafimovski T., Alderton M., Dolenc T., Tasec G., Dolenec M., 2005, Heavy<br />
metals in sediments <strong>and</strong> soils around the Bukim copper mine area, Geological<br />
Macedonia, vol. 19, Faculty of Mining <strong>and</strong> Geology, Stip, Macedonia.<br />
� Shushku B. Goskolli E. Hedman K. <strong>and</strong> al. 1999. Fani river environnementale<br />
réhabilitation programme, Final report. Geology <strong>and</strong> Mining Faculty, Tirana,<br />
Albania.<br />
94
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
On the LINK between OROGENIC SHORTENING <strong>and</strong> “BACK-ARC”<br />
EXTENSIONAL COLLAPSE in LOW TOPOGRAPHY OROGENS<br />
Liviu MATENCO 1 <strong>and</strong> M. DUCEA 2<br />
1 Netherl<strong>and</strong>s Research Centre for Integrated Solid Earth Science, VU University Amsterdam,<br />
De Boelelaan 1085, 1081 HV Amsterdam, The Netherl<strong>and</strong>s,<br />
2 University of Arizona, Department of Geosciences, Tucson, AZ, USA<br />
Classical models of orogenic evolution assume that back arc basins form in the hinterl<strong>and</strong> of<br />
orogens, collapsing the upper plate above oceanic subduction zones. This is a common<br />
characteristic of all low-topography orogens of Mediterranean type, driven by the fast rollback<br />
of subducted slabs. This extension may take place far at the interior of the upper plate, as<br />
is the case in various segments of the Carpathians, but in most cases of the Dinarides,<br />
Apennines or Hellenides it take place superposed or far into the forel<strong>and</strong> of oceanic susture<br />
zones. Therefore, the term back-arc extension is misleading, as exhumation along major<br />
detachment zones takes place in the core of the orogen (Rif, Betics), in the accreted crustal<br />
material of the lower plate (Apennines, Dinarides) or even in the fore-arc (Aegean). The<br />
present-day Mediterranean Sea with its oceanic crust does not contain the main subduction<br />
zone which formed these mountain chains. Western Mediterranean formed in response to the<br />
rapid roll-back of the Calabrian slab, while Eastern Mediterranean is a remnant of an older<br />
oceanic domain, the Neotethys. The Mediterranean orogens formed in response to the<br />
subduction <strong>and</strong> collision of the Alpine Tethys (senso largo) during post-Early Cretaceous<br />
times. The Hellenides are a particular situation, where the continental crust has been scraped<br />
between the point of Alpine Tethys collision <strong>and</strong> Neotethys, initiating subduction in the latter.<br />
This means that collision has largely duplicated crustal blocks from the lower plate <strong>and</strong> has<br />
gradually shifted subduction zone far towards the lower plate. Amounts of lower plate<br />
shortening in these orogens range from >120km in the Dinarides,
�<br />
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
HYDRODYNAMIC CONDITIONS of the VISOKA FIELD TRAPPING<br />
Prof.. Dr. Ajet MEZINI <strong>and</strong> Prof. Dr. Ilia FILI<br />
IEC Visoka, Albania Branch<br />
The Visoka oilfield is the first carbonate filed discovered in Albania.<br />
From the tectonic point of view, it is situated in the Jonian Zone, in the center of “Kurveleshi”<br />
structural belt. (Fig.1). Being connected to the Southern periclinal of the Patos-Verbas anticlinal<br />
structure, which is eroded at the top, the exploration of this filed was a special case (Fig.2).<br />
Visoka reservoir is represented by the carbonate reservoir<br />
of Cretaceous-Paleogene deposits. It is a particular case<br />
regarding the geological <strong>and</strong> hydrodynamic condition of the<br />
trap formation, for the storage of oil <strong>and</strong> gas accumulation.<br />
This is related to the lack of flysch cover in the northern part<br />
of the field. In these geological conditions, the Visoka trap is<br />
opened in its Northern part, <strong>and</strong> the geologists question what<br />
are the geological <strong>and</strong> hydrodynamic factors that<br />
conditioned the trap formation in Visoka reservoir. In order<br />
to argument the trap formation in this reservoir, the data for<br />
the structure of Patos-Verbas, Visoka area <strong>and</strong> further in the<br />
south, in Ballsh up to Kemenara, were analyzed. The Visoka<br />
field is one of the rarest cases of oil<br />
Fig.1: Visoka oilfield situation <strong>and</strong> gas trap formation in the one part of an anticline<br />
structure.<br />
which is eroded at its top part. The conditions of the oil<br />
trapping <strong>and</strong> reservoir formation in Visoka are complicated that’s why these reservoir types are<br />
called “sly“ reservoirs, or hydrodynamic reservoirs. In the southern part of the structure there is the<br />
anticline structural form for preserving the reservoir in three principal directions. The Visoka trap<br />
is opened in the north direction, where it is eroded the top part of the carbonate, <strong>and</strong> lack flysch<br />
deposits. Miocene s<strong>and</strong>stone lie transgressively over them (Fig.2).<br />
After the drilling of a great number of wells in Visoka, Ballsh, <strong>and</strong> more in the south, many data<br />
were taken about the hydro-dynamic conditions of the waters movement in regional scale. It was<br />
reached into the conclusion that the hydro-chemical situation of Visoka is diversified in the saltyionic<br />
composition (the extension diapason is very wide) as well as in their chemical type. The<br />
general mineralization has very wide limits, from 0,1 gr/l (well 651 in the North) up to 36. 0 gr/l<br />
(well 641 in the south). Changes, <strong>and</strong> gradual transitions of the water type <strong>and</strong> general<br />
mineralization, in accordance to the deposits sinking, <strong>and</strong> the water metamorphosed scale, have<br />
been observed in the North-South direction. A type of soda bicarbonate water of increased<br />
metamorphosed coefficient is stored about 500 m from the eroded surface; further in the south, a<br />
97<br />
�
mineralization increase, a reduction of the mineralization coefficient, <strong>and</strong> the change of the water<br />
in chloro-calcitic type has been noticed.<br />
By analyzing the entire factual abundant material, it is very clear the presence of a hydro chemical<br />
deviation in the direction of the water movement, from the top part to the direction of the Southern<br />
pericline of anticline structure.<br />
Besides hydro chemical data which determine the direction of waters movement, it is also been<br />
made the calculation of the piezometric level of the carbonate complex of Visoka oilfield. The<br />
hydrodynamic measuring data about the Visoka-Ballsh region, were developed in order to<br />
calculate the reduced pressure on a plan surface for comparison, based on the formula:<br />
�<br />
Fig.2: Cross section in Visoka Oil Field.<br />
P = (L + l) ¥ + 2 where: P = the calculated pressure on a surface, L = the absolute depth of the<br />
well. L = static level calculated from the sea level; ¥ = specific weight of the water taken from the<br />
well. The piezometric level of some wells in Visoka was calculated based on these data (see table).<br />
Both the piezometric level <strong>and</strong> pressure values prove movement of water from the eroded surface,<br />
well 651, in South direction, according to the above line of wells. A full compliance between the<br />
hydro-chemical <strong>and</strong> hydro-dynamic indicators has been observed in the Visoka field.<br />
Well Reduced Piezometric<br />
pressure level<br />
651 208.3 146.1<br />
649 207.4 135.2<br />
G-16 205.9 121.7<br />
Ba-6 206.4 131.2<br />
Ba-13 205.9 123.3<br />
Ba-8 206.1 123.9<br />
Ba-15 206.4 127.06<br />
Ba-1 205.3 115.4<br />
Gr-3 204.5 108.4<br />
Visoka oilfield proves the basic principle of the<br />
hydrogeology, that the hydrochemistry is a<br />
consequence of the hydrodynamic, <strong>and</strong> the last one is<br />
the result of the geological-structural conditions. In<br />
these hydro-dynamic conditions, the Oil-Water contact<br />
in Visoka is not horizontal. It is inclined in Southern<br />
direction, or in the direction of water movement (636,<br />
1050m, G-180, 1840m), as well as in the West direction<br />
(well 627 1325m), <strong>and</strong> in East (G-238 1680m).<br />
The inclined oil-water contact in Visoka is the<br />
synthesis of the coordination of the active underground<br />
waters to the oil reservoir, as well as their role during<br />
the paleo-hydro- geological development in creating the<br />
conditions for the reservoir preservation. By analyzing all the geological, hydrodynamic, hydrogeological,<br />
physical, chemical, biodegrading, lithological, stratigraphic, <strong>and</strong> tectonic data, we think<br />
that besides the principal factor in the trap formation of Visoka, some other factors have also<br />
played an important role, such as:<br />
According to hundreds of exploration <strong>and</strong> exploited wells in Visoka field it is been observed a<br />
noticeable heterogeneity of the rock property features between the wells, particularly regarding the<br />
permeability. This heterogeneity <strong>and</strong> the anisotropy have influenced in preventing the oil migration<br />
98<br />
�
from the Southern part to the direction of the top of the structure. Cases of lack of communication<br />
from one well to another, <strong>and</strong> between two double wells, are numerous in Visoka oil field. Such<br />
collector barriers are also known in other carbonate oilfields in our country, such as the case of the<br />
direct contact of western flank of Mollajt to the Eastern flank of Selenica. At the zone of dry wells<br />
G-56, G-57, G-58 <strong>and</strong> 616, which represents the transition from the Central zone to the Northern<br />
one, there is a noticeable lack of communication, low permeability,(Dry wells), which has<br />
prevented the oil migration in the Northern direction.<br />
The Upper Miocene mollassic deposits lie transgressively over the eroded part of the carbonate, of<br />
the Patos-Verbasi anticline structure (Fig.2). It is an undisputable fact that a great quantity of oil<br />
<strong>and</strong> gas reserves has migrated from the eroded carbonate to the s<strong>and</strong>stone reservoir of these<br />
deposits, <strong>and</strong> has saturated them, up to their outcrop in the surface in South, in Patos. During the<br />
geological period Upper Miocene-Quaternary, at the part where these deposits come out to the<br />
surface, the oil is oxidized, the light fractions move away, <strong>and</strong> are turned into bitumen. In the<br />
current situation these layers are bitumen-bearing layers. Bitumen has served as a screen (seal) to<br />
prevent further migration of the oil. So, it is created a natural coverage, or bitumen screen, which<br />
has not allowed the further migration of the oil in the newest geological times.<br />
S<strong>and</strong>stone deposits are situated in stratigraphic discordance on the eroded surface of the carbonate,<br />
or of the argillites, of the Upper Miocene. Being in direct contact on the eroded carbonate, these<br />
deposits communicate with the last ones which they are supplied with oil. The presence of the<br />
argillaceous lithology, or the compact s<strong>and</strong>stones, in the southern part of the eroded surface makes<br />
impossible the oil migration to this part of the structure from the southern part of the field.<br />
The oil of Visoka oil field is very viscous, of specific weight 0.990-1.02 gr/cm 3 . This oil is<br />
migrated by the early fluxes of migration, Lower Oligocene <strong>and</strong> on. During the geological periods<br />
thanks to the different structural <strong>and</strong> geological conditions are moved away the lightest oil<br />
fractions. Also, being in contact with the water that moves through the eroded surface of the<br />
carbonate, the oil is oxidized. Its swimming force is too small, or zero, when the specific weight is<br />
almost the same to the water. In these conditions the movement has been very difficult, or its<br />
migration from Visoka reservoir to the direction of the top-most part.<br />
The tectonic plan of Patos-Verbas has changed after the erosion of its top part. The northern part of<br />
the carbonate eroded surface is under the absolute depth 2000 m today, or lower than the carbonate<br />
top in Visoka. This change of the tectonic plan has made possible the fluids movement <strong>and</strong> reestablishment<br />
in this structure.<br />
All these factors together have made possible that Visoka oil field is preserved in the current<br />
situation of the hydro-dynamic equilibrium of fluids. However, a great quantity of oil reserves has<br />
migrated from this structure. The oil field has been created, destroyed, <strong>and</strong> recreated in the<br />
youngest geological periods.<br />
Conclusions<br />
The Visoka field represents a special case of the trap formation of hydrodynamic type, formed in<br />
the southern pericline of an anticline structure.<br />
The hydro-dynamic <strong>and</strong> hydro-chemical measurements of the wells in Visoka <strong>and</strong> Ballsh prove the<br />
existence of a pressure gradient <strong>and</strong> the underground waters movement from the raised part of<br />
Patos-Verbas structure in its plunging direction. The water movement in this direction has made<br />
possible the preservation of the oil reservoir in Visoka.<br />
�<br />
99<br />
�
Besides the hydro-dynamic factors, in the preservation of Visoka reservoir have influenced also<br />
other factors such as: geochemical, collector, permeability <strong>and</strong> the geological-structural<br />
framework.<br />
The oil-water contact of the field is slope <strong>and</strong> it falls in the South direction with a smaller angle<br />
than the top carbonate.<br />
The hydrodynamic <strong>and</strong> hydro-chemical studies are equally important as the tectonic <strong>and</strong><br />
stratigraphic ones for exploring the new reservoirs, especially in hydro-geological complicated<br />
conditions.<br />
References<br />
Abhijit Y. D<strong>and</strong>ekar, 2006. Petroleum Reservoir Rock <strong>and</strong> Fluid Properties.<br />
Alimonti C., 2002. Quantifying matrix-to fracture connectivity in fractured reservoirs.<br />
Aliscioni A., 2002. AAPG Hedberg Conference, May 14-18, 2002, Palermo.<br />
Cosentino L.,2001. Integrated Reservoir Studies. Edition TECHNIP.<br />
Dhamo Ll. etj.<br />
Djebbar T. 2004. Petrophysics. Theory <strong>and</strong> practice of measuring reservoir rock, <strong>and</strong> transport<br />
properties.<br />
Donaldson E.<br />
Gambini R., 2002. Mondello, Sicily, Italy, 2002.<br />
Kadilli F. etj., 1967.<br />
King H., 1974. Oil trapping in the hydro-dynamic conditions. AAPG Bull.,<br />
37, Nr 8.<br />
Moore B., 2007. Carbonate Reservoirs. Porosity Evolution <strong>and</strong> Diagenesis, Developments in<br />
sedimentology, 55. Elsevier.<br />
Pano Dh., 1989. Optimal Criterionsof Visoka Oil Field exploitation.<br />
Ranxha S. etj.,1989.<br />
Sahatçiu R.,1967. Report about reserve calculation on Visoka oil field.<br />
Sako L.,1972. Exploitation Analysis of Visoka oil Field, Fier.<br />
Shtrepi P., 1980. Complex of indicators for study of Hydro-dynamic oil fields. IGJN Fier, Albania.<br />
Shtrepi P.,1982. Hydro-geological characteristics of oil fields in Albania. IGJN, Fier, Albania.<br />
Taylor & Francis.<br />
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100<br />
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ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
FOUR DIMENSIONAL GEOLOGICAL EVOLUTION<br />
of the EASTERN TYRRHENIAN MARGIN<br />
<strong>and</strong><br />
GEODYNAMIC IMPLICATIONS<br />
Alfonsa MILIA (*), Eugenio TURCO (°) <strong>and</strong> Maurizio M. TORRENTE ( # )<br />
(*) IAMC-CNR, Naples, Italy; e-mail: alfonsa.milia@hotmail.it<br />
(°)<br />
( # ) DSGA, University of Sannio, Benevento, Italy; e-mail: torrente@unisannio.it<br />
The Tyrrhenian Sea is a Neogene back-arc basin formed by continental extension at the rear of the<br />
eastward migrating Apennine subduction system. It is characterized by deep central basins<br />
(Magnaghi-Vavilov <strong>and</strong> Marsili) containing elongated volcanoes <strong>and</strong> deep peri-tyrrhenian basins<br />
filled by thick sedimentary successions. Even if numerous studies were based on data in the deep<br />
central basins (e.g. Kastens et al, 1988; Sartori, 1990) the study of sedimentary basins located along<br />
the margin of the Tyrrhenian Sea reconstructed a detailed chronostratigraphic framework <strong>and</strong> a<br />
four-dimensional reconstruction of the fault systems (e.g. Milia <strong>and</strong> Torrente, 1999; Milia et al.,<br />
2009).<br />
We studied the Eastern Continental Margin of the Tyrrhenian Sea, between the 42° <strong>and</strong> the 38° N<br />
parallel (Latium-Campania-Calabria margin, Fig. 1) characterized by deep sub-basins filled with up<br />
to 3-5 km of Plio-Pleistocene sediments. The geologic evolution of these basins have been<br />
established on the basis of a large amount of seismic reflection data with different resolution <strong>and</strong><br />
penetration, exploration wells, core data <strong>and</strong> onshore data. The interpretation of the seismic<br />
reflection profiles, based on seismic/sequence stratigraphy <strong>and</strong> structural analysis methodologies,<br />
permitted to determine timing <strong>and</strong> kinematics of the faults affecting the Eastern Tyrrhenian Sea.<br />
During the Upper Pliocene-Lower Pleistocene the Gaeta Basin (Latium) was affected by an E-W<br />
extension that formed a deep triangular graben bounded by approximately NNE- <strong>and</strong> NNWtrending<br />
normal faults (Iannace et al. 2010). Simultaneously, off Calabria, originated the Paola<br />
Basin, an asymmetric extensional basin controlled by E-W normal faults <strong>and</strong> more than 2 km thick<br />
of sedimentary succession (Milia et al., 2009). During the Middle Pleistocene, between 700 <strong>and</strong> 400<br />
ky, the Campania margin was affected by NE trending half grabens filled with up to 3 km of clastic<br />
deposits associated to a NW-SE directed extension (Milia 1999, Milia <strong>and</strong> Torrente, 1999), while<br />
the Paola Basin was characterized by a remarkable folding associated the activity of a left lateral<br />
trascurrent fault zone <strong>and</strong> the deposition of approximately 1 km of sin-kinematics sediments. Over<br />
the last 400 ky on the Campania Margin the extension direction changed from SE to ESE <strong>and</strong> the<br />
prexisting fault systems were reactivated during the emission of large volume ignimbrite eruptions<br />
(Milia <strong>and</strong> Torrente, 2007; Torrente et al., 2010). At the same time a right lateral trascurrent fault<br />
zone affected the Paola Basin <strong>and</strong> ca 1 km of deep water sediments were deposited in a N-S<br />
oriented basin depocenter.<br />
Our four dimensional reconstruction of the sub-basins permits to point out the structural styles of<br />
the Plio-Pleistocene phases of basins development. These structural styles can be related to opening<br />
episodes of the Tyrrhenian Sea <strong>and</strong> the three phases of the basins developments furnish a constraint<br />
to the reconstruction of the Plio-Pleistocene evolution of the Eastern Tyrrhenian Sea.<br />
1) During the Upper Pliocene-Lower Pleistocene the opening of the Gaeta Basin (Latium) <strong>and</strong> of<br />
the oceanic Marsili Basin occurred; contemporaneously an extension zone (Paola Basin) between<br />
101
these basins formed. 2) During the Middle Pleistocene a rifting episode took place in the Campania<br />
margin that formed NE trending half grabens while the extension stopped in the Gaeta Basin. 3)<br />
Over the last 400 ky the Eastern Tyrrhenian margin the extension in the Campania Margin is<br />
associated to an intense volcanism <strong>and</strong> a dextral shear zone characterize the boundary between the<br />
deep Tyrrhenian basin <strong>and</strong> the Eastern Tyrrhenian continental Margin (Milia et al., 2009; Milia et<br />
al., 2010). The results of this geologic processes is the individuation of a breakway zone located in<br />
the Campania Margin that bound a microplate migrating toward the SE.<br />
Fig. 1. Seafloor morphology of the Tyrrhenian Sea (Marani et al., 2004) <strong>and</strong> location of the study<br />
area.<br />
References<br />
Iannace P., Massa B., Milia A., Torrente M.M. (2010) 3-D modeling of the structural features of<br />
Gaeta Bay (Eastern Tyrrhenian Sea margin). Rendiconti online Soc. Geol. It., Vol. 10, 73-75.<br />
Kastens, K.A., Mascle, J. <strong>and</strong> Others, O.D.P. (1988) Leg 107 in the Tyrrhenian Sea: insights into<br />
passive margin <strong>and</strong> backarc basin evolution. Geol. Soc. Amer. Bull. 100, 1140-1156.<br />
Marani M.P., Gamberi F., Bortoluzzi G., Carrarra G., Ligi M., Penintenti D. (2004) Seafloor<br />
morphology of the Tyrrhenian Sea, Scale 1:1,000,000. Included to Mem. Descr. Carta Geol.<br />
Italia, 44.<br />
Milia, A. 1999. Aggrading <strong>and</strong> prograding infill of a pery-tyrrhenian basin (Naples Bay, Italy).<br />
Geo-Mar. Lett., 19, 237-244.<br />
Milia A. <strong>and</strong> Torrente M.M. (1999) Tectonics <strong>and</strong> stratigraphic architecture of a pery-Tyrrhenian<br />
half-graben (Bay of Naples, Italy). Tectonop., 315, 297-314.<br />
Milia A. <strong>and</strong> Torrente M.M. (2007) The influence of paleogeographic setting <strong>and</strong> crustal subsidence<br />
on the architecture of ignimbrites in the Bay of Naples (Italy). Earth Planet. Scie. Lett., 263,<br />
192-206.<br />
102
Milia A., Turco E., Pierantoni P.P. <strong>and</strong> Schettino A. (2009) Four-dimensional tectono-stratigraphic<br />
evolution of the Southeastern peri-Tyrrhenian Basins (Margin of Calabria, Italy). Tectonoph.,<br />
476, 41-76.<br />
Milia A., Morabito S., Passero S., Ruggieri S., Turco E. (2010) Tectonics <strong>and</strong> Geomorpholgical<br />
processes between Sirene <strong>and</strong> Sartori Lineaments (Eastern Tyrrhenian Sea). Rendiconti online<br />
Soc. Geol. It., 10, 83.<br />
Sartori, R., 1990. The main results of ODP Leg 107 in the frame of Neogene to Recent geology of<br />
perityrrhenian areas. In: Kastens,K.A., Mascle, J., et al. (Eds.), Proceedings of the Ocean<br />
Drilling Program. Scientific Results 107, pp. 715– 730.<br />
Torrente M.M., Milia A., Bellucci F., Rol<strong>and</strong>i G. (2010) Extensional tectonics in the Campania<br />
Volcanic Zone (eastern Tyrrhenian Sea, Italy): new insights into the relationship between<br />
faulting <strong>and</strong> ignimbrite eruptions. Ital. J. Geosci. (Boll. Soc. Geol. It.), 129, 1-19.<br />
103
104
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
TRIASSIC-JURASSIC VOLCANO-SEDIMENTARY FORMATION in ALBANIA <strong>and</strong> its<br />
RELATION with the MIDDLE JURASSIC MIRDITA OPHIOLITE<br />
Ibrahim MILUSHI 1 , Avni MESHI 2 <strong>and</strong> Gjon KAZA 1<br />
1 Institute of Geosciences, Polytechnic University of Tirana, Albania<br />
2 Faculty of Geology <strong>and</strong> Mine, Polytechnic University of Tirana, Albania<br />
Volcano-sedimentary formation (VSF) of the Middle Triassic to lower Jurassic ophiolite is<br />
relatively widespread in Albania. The formation, as a non-continuous narrow belt, extends for<br />
more than 300 km along the western <strong>and</strong> the eastern margins of the Middle Jurassic ophiolite. In<br />
most cases VSF is “s<strong>and</strong>wiched” between Middle Jurassic ophiolite massifs in the hanging-wall<br />
<strong>and</strong> Triassic-Jurassic sedimentary formations of the former continental margin in the foot-wall.<br />
At the thrust contact between VSF <strong>and</strong> ophiolite, which is outlined by serpentinite, a<br />
metamorphic sole represented by blue schist, mica schist <strong>and</strong> amphibolites has developed.<br />
In places, VSF crops out even as tectonic windows inside the Middle Jurassic ophiolite, implying<br />
it is extending widely underneath the ophiolitic massifs.<br />
Thickness of VSF is generally 150-300 m, but in some areas it reaches up to several hundred<br />
meters: the Porave over 800 m, 600 m in Karma, in Rubik up to 600 m, etc.<br />
It consists of MORB-type basalts, radiolarian cherts <strong>and</strong> argillaceous-siliceous <strong>and</strong> siliceous<br />
schist. In different areas, different facies are predominant: for example basalt dominates in<br />
Porava, Karma <strong>and</strong> Rubiku, while schists <strong>and</strong> radiolarian cherts are more developed in Gjegjani,<br />
Surroj, etc.<br />
Basalts are represented by pillow <strong>and</strong> aglomeratic lavas, rarely by massive basalts. They belong<br />
to tholeites rich in TiO2 ranging from 1.1 to 2.2 % often showing <strong>and</strong>esitic tendency. According<br />
to the ages determined by the radiolaria of the cherts, VSF belongs to a wide age range from Mid<br />
Triassic to Lower Jurassic.<br />
VSF formed after the continental break-up that started in Middle Triassic <strong>and</strong> kept on during the<br />
Late Triassic up to Early Jurassic. In the Middle Jurassic, the Mirdita ocean became again active,<br />
accounting for the development of the Jurassic Mirdita ophiolite During the last part of the<br />
Middle Jurassic, after the intraoceanic suprasubduction event, the Middle Jurassic ophiolite<br />
massifs were thrust over the Middle Triassic-Lower Jurassic VSF. Consequently, the<br />
metamorphic sole originated. Later, under the compressional regime which took place in Late<br />
Jurassic, VFS together with ophiolite massifs were thrust over the former continental margin.<br />
In most cases VSF is folded <strong>and</strong> intensely sliced, incorporating even fragments of a “block in<br />
matrix” mélange.<br />
Flysch of Tithonian-Valanginian unconformably covers the formations of former continental<br />
margin, VSF <strong>and</strong> ophiolites.<br />
VSF is rich in massive sulphide ores. These mineralizations are different from those related to<br />
the volcanic sequences of the Middle Jurassic Mirdita ophiolite.<br />
105
106
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
BIOSTRATIGRAPHY of the TARBUR FORMATION, ZAGROS BASIN<br />
I. Maghfouri MOGHDDAM<br />
Department of Geology, faculty of Sciences, Lorestan university , Fakol aflak, khorram abad,<br />
Iran<br />
E-mail: iraj mmms @ yahoo.co.uk<br />
phone:++ 98661 2200272<br />
Fax:++ 98661220285<br />
The Tarbur Formation is a predominantly carbonate lithostratigraphic unit that crops out in<br />
the Zagros Basin, between the main Zagros reverse fault <strong>and</strong> the High Zagros <strong>and</strong> east of<br />
Sabzpushan Fault. This formation was studied from biostratigraphic point of view at four<br />
measured sections (Robut, Chumsangar, Balghar <strong>and</strong> Sarvestan).<br />
Microbiostratigraphical data mainly based on foraminifera which indicate Early- Middle<br />
Maastrichtian age for deposits of the Tarbur Formation at Sarvestan <strong>and</strong> Middle Maastrichtian<br />
for Balgar, Robat <strong>and</strong> Chamsangar sections.<br />
Keywords: Tarbur Formation, biostratigraphy, Maastrichtian, Zagros.<br />
107
108
ILP�TASK�FORCE�on�SEDIMENTARY�BASINS�<br />
2010�<strong>International</strong>�Workshop�<br />
November�7�12,�2010,�Tirana�(Albania)�<br />
The ENGINEERING GEOLOGICAL <strong>and</strong> GEOPHYSICAL STUDIES for LAND-USE<br />
PLANNING in ADRIATIC COASTAL PLAIN-DIVJAKA, ALBANIA<br />
�<br />
Ylber MUCEKU, Jani SKRAMI, Edmond DUSHI, Mehmet ZAÇAJ<br />
Institute of Geosciences, Polytechnic University of Tirana, Albania<br />
In this paper are presented the results of the engineering geological investigation carried out<br />
in the Adriatic Coastal Plain of Albania, Divjaka area. The studied area extends in west of<br />
Lushnja town, along of the Adriatic coastal plain from Shkumbini to Semani Rivers delta. It’s<br />
one of the most attractive place in Albania, because of there are several wonderful beaches,<br />
which have take much interest of many designers companies <strong>and</strong> institutions related to<br />
touristic center development. That is the motivation, why last years we have carried out the<br />
geotechnical <strong>and</strong> geophysical investigations, results of which are presented in this paper.<br />
From these works an engineering geology zoning map on scale 1: 10 000 is completed. For<br />
that are done 35 geotechnical drillings with 20.0m up to 30.0m <strong>and</strong> many seismic<br />
measurements, as well as, are taken respectively 78 <strong>and</strong> 57 disturbed <strong>and</strong> undisturbed soils<br />
samples. They are taken in different depth of the boreholes from 1.0m up to 30.0m <strong>and</strong> are<br />
analyzed in the laboratory to determine of physical <strong>and</strong> mechanical parameters as bulk<br />
density, grain size distribution, Atterberg’s limits, moisture content, specific density, dry<br />
density, porosity, porosity coefficient, shear strength <strong>and</strong> oedometer module. Also, in<br />
compilation of the engineering geology map are taken under consideration the oils boreholes<br />
carried out for oils exploration purpose, which are 500-1000m deep. Besides of the boreholes<br />
are used <strong>and</strong> seismic methods, which have helped to determine the soils thickness,<br />
underground waters, as well as the structural <strong>and</strong> neotectonic elements. So, for investigation<br />
of soils deposits in Divjaka area a lot of seismic velocities measurements on surface <strong>and</strong> in<br />
boreholes have been carried out. For this are completed 40 points of seismic measurements<br />
represented by the velocity of shear <strong>and</strong> longitudinal waves (Vs <strong>and</strong> Vp). Furthermore, in the<br />
western part of Divjaka town, are taken the velocity measurements of shear <strong>and</strong> longitudinal<br />
waves (Vs <strong>and</strong> Vp) in the depth of the boreholes by using the “down-hole” seismic method.<br />
According to geology Divjaka area is part of the Western Lowl<strong>and</strong> of Albania <strong>and</strong> it includes<br />
in Preadriatic Depression. It is built by Mio-Pliocene molasses <strong>and</strong> Quaternary deposits.<br />
Whereas, related to geological structure the Preadriatic Depression is built by some Mio-<br />
Pliocene wide synclines <strong>and</strong> linear relatively narrow anticlines as Divjaka anticlines, which<br />
are superimposed over thrust <strong>and</strong> back thrust faults. The Mio-Pliocene anticline folds do not<br />
outcrop with all their elements, whereas the synclinal structures are buried from soils of<br />
Quaternary deposits. The positive structures of the western coastal part are well expressed on<br />
the relief; the anticlines build hills, while the synclines are covered by Holocene deposits. The<br />
soils are represented by coastal, alluvial, lagoons <strong>and</strong> swamps deposits. They have the<br />
thickness varied from 20.0-30.0m (eastern part) <strong>and</strong> 300.0–350.0m (western part). The coastal<br />
deposits consist of s<strong>and</strong>s <strong>and</strong> silty s<strong>and</strong>s <strong>and</strong> extend to west of the studied area, along the<br />
109
Adriatic coastline. The alluvial deposits (delta of the River Shkumbini) are located in the<br />
northern part of the study area <strong>and</strong> represent by combination of loam <strong>and</strong> s<strong>and</strong> layers.<br />
Whereas, the lagoons <strong>and</strong> swamps deposits are found in west <strong>and</strong> southwest. They are formed<br />
as a result of interaction of the River Shkumbini with sediments discharged at the coast.<br />
Swamp deposits were characteristic of a past, semi-arid l<strong>and</strong>scape of the Holocene age <strong>and</strong><br />
are located in west of studied area. All above mentioned soils are situated over of molasses<br />
rocks. From the hydrogeology point of view the observed zone is constructed by two<br />
complexes, which are soils (Quaternary deposits) <strong>and</strong> rocks (Molasses rocks). The lower <strong>and</strong><br />
middle part of the soils deposits are built by gravels <strong>and</strong> in upper part by coarse s<strong>and</strong>s, which<br />
are intercalated by thin layers of silts. The underground waters in the region, part which is the<br />
studied area are related to gravels <strong>and</strong> s<strong>and</strong>s formations, which formed a rich aquifer<br />
according to water bearing. The main water recourse of these formations is Shkumbini River.<br />
The second complexes represent by the molasses rocks that built from the layers combination<br />
of claystones, siltstones <strong>and</strong> s<strong>and</strong>stones rocks. The claystones <strong>and</strong> siltstones are very poor to<br />
water bearing, whereas the s<strong>and</strong>stones formations form a good aquifer to underground water<br />
reserves. During fields works is systematically taken the measurements of underground water<br />
levels. This procedure is repeated each month for three month in row <strong>and</strong> concluded that<br />
underground water table is 0.5-1.0m up to 3.0-5.0m deep.<br />
Based on morphology features the studied area is divided in flat morphological unit <strong>and</strong> hills<br />
morphological unit.<br />
The flat morphological unit represents by the Adriatic flat plain with elevation varies from<br />
0.5-2.0m (western part) to 5.0-7.0m (eastern part). Along of this zone from east to west<br />
direction have established their valleys with “U” shape Shkumbini <strong>and</strong> Semani rivers <strong>and</strong><br />
central part is located Karavasta lagoon.<br />
Hills morphological unit is located in east of studied area. It is represented by Divjaka hills<br />
chain. The elevation of this morphological unit range from 80 m up to 120 -150 m. The<br />
morphological unit is composed by claystones, siltstones, s<strong>and</strong>stones <strong>and</strong> conglomerates<br />
rocks. The hills slopes have inclination range from 6 o -10 o up to 15 o -30 o <strong>and</strong> some place more.<br />
Engineering Geology Zoning-From fields <strong>and</strong> laboratories data analysis an engineering geology map<br />
on scale 1:10 000 was compiled. From this analysis the study area is divided in the following<br />
engineering geology zones:<br />
· The engineering geology zone of the silts <strong>and</strong> s<strong>and</strong>s combination with thickness 10-30 m <strong>and</strong><br />
underground waters below 5 m.<br />
· The engineering geology zone of the silts <strong>and</strong> s<strong>and</strong>s combination with thickness 30-100 m <strong>and</strong><br />
underground waters range from 3 m up to 5 m.<br />
· The engineering geology zone of the fine to medium s<strong>and</strong>s-beach s<strong>and</strong>s <strong>and</strong> seas s<strong>and</strong>s with<br />
thickness exceed 100 m <strong>and</strong> underground waters range from 0.5 m up to 3 m.<br />
· The engineering geology zone of the peat–loam-s<strong>and</strong>s combination with thickness exceeds<br />
100.0m <strong>and</strong> underground waters 0.5 m.<br />
· The engineering geology zone of the loam-s<strong>and</strong>s combination-alluvial fan of Shkumbini River<br />
with thickness exceeds 100 m <strong>and</strong> underground waters range from 0.5 m up to 3 m.<br />
· The engineering geology zone of the diluvium deposits coverage, represent by silts <strong>and</strong> clays<br />
with thickness 1.5-5 m.<br />
· The engineering geology zone of the soft rocks, claystones.<br />
In the end, we emphasize the studied area is generally built by soils with low geotechnical<br />
properties, which in case of urban development have necessary needs of taking of engineering<br />
measures to soils foundation improvements.<br />
110
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
LOW TEMPERATURE THERMOCHRONOMETRY in INTERNAL ALBANIDES:<br />
QUANTITATIVE CONSTRAINTS on EXHUMATION RATE <strong>and</strong> TECTONIC<br />
IMPLICATIONS<br />
Bardhyl MUCEKU (1) , Georges H. MASCLE (2) Peter van der BEEK, (2) Matthias<br />
BERNET (2) , Peter REINERS (3) , <strong>and</strong> Artan TASHKO (1)<br />
1 Polytechnic University of Tirana, Rruga Elbasani, Tirana, Albania.<br />
2 Laboratoire de Géodynamique des Chaînes Alpines, Université Joseph Fourier, BP 53, 38041 Grenoble,<br />
France.<br />
3Department of Geosciences, University of Arizona, Tucson, AZ 85721, USA.<br />
*corresponding author, email: bmuceku@gmail.com<br />
Albania occupies a central position within the Dinaro-Hellenic alpine mountain belt. This<br />
orogen is characterized by three fundamental components: a Western Fold-<strong>and</strong>-Thrust Belt<br />
(External Albanides), a Central Belt characterized by the occurrence of ophiolitic nappes, <strong>and</strong><br />
an Eastern Complex (Internal Albanides). The internal Albanides were affected by pre-<br />
Tertiary tectonics, <strong>and</strong> in the external Albanides the deformation started during the Eocene.<br />
This deformation is related to subduction of the Apulian plate beneath the Eurasian plate.<br />
Fission-track (FT) <strong>and</strong> (U-Th)/He analysis on apatite <strong>and</strong> zircon permits to better constrain the<br />
thermal history of this mountain belt. Apatite (U-Th)/He ages in the western <strong>and</strong> northern<br />
Internal Albanides range from 55 Ma to 24-35 Ma, being in strong contrast with younger<br />
apatite (U-Th)/He ages of 4.5 to 9.3 Ma obtained for the eastern Internal Albanides. All of<br />
these results are in good agreement with AFT ages from the same areas. The observed eastwest<br />
trend with older cooling ages in the west <strong>and</strong> younger cooling ages in the east across the<br />
Albanides is also reflected in zircon (U-Th)/He ages that range between 80-100 Ma in the<br />
north-western Internal Albanides, <strong>and</strong> 20-50 Ma in the eastern Internal Albanides. Only the<br />
higher-temperature zircon FT ages do not show any significant differences on both sides of<br />
this area. Thermal modeling based on the available low-temperature thermochronologic data,<br />
in particular the apatite (U-Th)/He ages, provide clear evidence for a phase of rapid<br />
exhumation of the eastern Internal Albanides around 3-6 Ma, reaching a rate of about 1.2<br />
km/m.y., while the western Internal Albanides record much slower exhumation since the<br />
Eocene (< 0.1 km/m.y.).<br />
The strong lateral gradient in rock uplift rates implied by the thermochronologic data suggests<br />
accommodation of this variation by faulting. The present-day structure of the Albanides, with<br />
major west-dipping faults forming the boundary between the Mirdita <strong>and</strong> Korabi zones <strong>and</strong><br />
occurring within the Korabi zone constrains such faulting to be extensional on reactivated<br />
NE-SW trending former thrust fault systems.<br />
We suggest that late Oligocene to early Miocene crustal thickening <strong>and</strong> shortening in the<br />
Albanides changed to an extensional regime in the eastern part of the orogen at about 6 Ma.<br />
Our thermochronological data indicate that rocks of the Korabi zone where exhumed from 2-3<br />
km depth during this late extension phase. These results are in good agreement with regional<br />
structural <strong>and</strong> stratigraphic information.<br />
111
112
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
ALBASEIS, RISK ASSESSMENT <strong>and</strong> SEISMICITY of ALBANIA<br />
Betim MUCO<br />
General Dynamics Inc./ IRIS, USA<br />
The project “Seismotectonics <strong>and</strong> Seismic Hazard Assessment in Albania” was the first<br />
NATO project for Albania. It has been a joint project between the Seismological Institute of<br />
Academy of Sciences of Albania <strong>and</strong> the Department of Geophysics of Aristotle University of<br />
Thessaloniki, Greece. This collaboration was an excellent example of the relations that<br />
European Union cultivated in the Balkan area through the Stabilization <strong>and</strong> Association Pact<br />
<strong>and</strong> other programs.<br />
Earthquake occurrence is most significant natural hazard in Albania. After the collapse of<br />
Communist regime <strong>and</strong> the opening of the country, a boom of constructions launched in<br />
Albania <strong>and</strong> it is still a developing sector. The eventual implementation of seismic hazard<br />
studies into the construction designs will prevent loss of life <strong>and</strong> property. On the other h<strong>and</strong>,<br />
the oil <strong>and</strong> gas are the main natural resources of the country. The seismotectonic analysis <strong>and</strong><br />
the identification of active tectonic faults <strong>and</strong> the study of the geophysical potential fields are<br />
closely connected with the effective exploitation of these resources.<br />
These two pillars composed the structure of the entire project which started in January 1999<br />
<strong>and</strong> ended in December 2003.<br />
During these four years of effective collaboration many significant publications were<br />
produced <strong>and</strong> contributed to the development of modern Seismology <strong>and</strong> Geophysics in<br />
Albania as well as to the better underst<strong>and</strong>ing of the oil <strong>and</strong> gas basins <strong>and</strong> their exploitation.<br />
A complete catalogue with more than 20,000 events has been obtained for the period 1964-<br />
2000 <strong>and</strong> all epicenters were relocated (Fig. 1). Earthquake locations have been improved<br />
using refined velocity models obtained from tomography <strong>and</strong> the Moho depth distribution has<br />
been mapped. Earthquake focal mechanisms have been determined using advanced techniques<br />
<strong>and</strong> plate motion models have been tested. The project provided important results on both<br />
deterministic <strong>and</strong> probabilistic analysis of seismic hazard assessment of Albania, the first<br />
complete studies of this kind in the country (Fig.2)<br />
The extensive study of potential fields, the distribution of gravitational <strong>and</strong> geomagnetic data<br />
provide significant contribution to the interests of research <strong>and</strong> exploitation organizations of<br />
the hydrocarbon reservoirs in Albania.<br />
With about two thirds of the budget going to Albania, this project helped to enhance the<br />
scientific infrastructure of the Seismological Institute directly <strong>and</strong> indirectly. The direct<br />
impact was the use of project funds for purchasing computers, printers, scanners, software,<br />
spare parts, instruments of seismic monitoring <strong>and</strong> seismological engineering.<br />
A local computer network has been established <strong>and</strong> the Internet connection has been for the<br />
first time available for all the scientific staff of the institute since 1999. A considerable<br />
number of Albanian scientists had the chance to be trained in well respected Earth Science<br />
Organizations in Thessaloniki, Rome, Trieste, <strong>and</strong> Skopje. Moreover, theNATO project<br />
provoked the increase of funding to the Seismological Institute through the Academy of<br />
Sciences of Albania for the modernization of seismic monitoring in the Albanian<br />
Seismological Network. A digital network <strong>and</strong> a satellite transmitting VSAT network were<br />
constructed during <strong>and</strong> in the wake of the ALBSEIS project.<br />
113
The first project of "Science for Peace" program of NATO for Albania has been a great<br />
contribution to the development of seismology in this country.<br />
Fig. 1 Relocated epicenters for the Albanian <strong>and</strong><br />
surrounding region of the period 1964-2000.<br />
114
Fig. 2 PGA distribution for 90% of non-exceedance on 50 years<br />
115
116
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
THERMAL EVOLUTION, HYDROCARBONS GENERATIONS <strong>and</strong> HC POTENTIAL<br />
of TRIASSIC <strong>and</strong> LIASSIC CARBONATE RESERVOIRS in the IONIAN ZONE<br />
(ALBANIA)<br />
(STUDY BASED on OUTCROPS <strong>and</strong> WELLS).<br />
Prof.Asc.Dr.Kristaq MUSKA<br />
Polytechnic University Tirana<br />
kristaqmuska@yahoo.fr<br />
(Poster presentation)<br />
SOURCE�ROCK�LEVELS�<br />
Several source rock levels have been observed in outcrops of different zones in Albanide. In the<br />
Ionian zone: black shale intercalations of Late Triassic from thin centimeters to thick organicrich<br />
layers, comparable to those of Burano formation (Early Triassic) in Southern Italy, have<br />
been encountered.<br />
Photo.1: Mali i Gjërë. Source rock levels<br />
In Cika belt Early Triassic source rocks have a<br />
gross thickness of up to 15m. Based on the<br />
outcrop samples TOC=0.1-38% have been<br />
recorded for these source rocks. In the basal<br />
Jurassic similar intercalations with higher TOC<br />
values (up to 52%) have been recorded. In the<br />
Shpiragu-1 well a 600m gross interval was<br />
recorded with posidonia shale interlayer. In<br />
Middle <strong>and</strong> Jurassic <strong>and</strong> also in the Late Jurassic some further thin, organic- rich shale<br />
intercalations with maximum TOC =9% have been evidenced. A couple of thicker bituminous<br />
shale/limestone intervals are known from the Lower Cretaceous with maximum TOC =27% have<br />
been recorded. They probably correlate with similar organic-rich deposits from Peri Adriatic<br />
carbonate platform of Former Yugoslavia.<br />
117<br />
Photo 2: Organic- rich shale<br />
SOURCE�ROCK�QUALITY�<br />
Good to excellent quality, of type I/II source<br />
rocks are present in the Upper Triassic, Lower<br />
Jurassic <strong>and</strong> Lower Cretaceous of the Ionian<br />
Zone. The Toarcian, Middle Jurassic <strong>and</strong>
Upper Jurassic of the Ionian Zone contain poor to good quality type I/II source rocks for oil.<br />
SOURCE�ROCK�MATURITY�<br />
The outcrops Upper Triassic <strong>and</strong> Lower Jurassic source rock levels in the Ionian zone show<br />
mature for oil generation (VR/E 0.53-0.88).<br />
THERMAL�EVOLUTION�<strong>and</strong>�HYDROCARBONS�GENERATIONS�<br />
Thermal evolution was made by 1D modeling with GENEX-GenTect software. These models<br />
were calibrated using the organic matter maturity parameters (Tmax, vitrinite).<br />
Fig.1: Model calibration.<br />
The paleotemperatures measured in the fluid<br />
inclusions were compared with the temperatures<br />
calculated by the model. In this way, it has been<br />
possible to determine the reservoir cementation time<br />
period.<br />
Fig.2: Evolution of the formations temperature with<br />
time <strong>and</strong> the burial.<br />
My results show that surface outcrops of Triassic-<br />
Liassic dolomitic reservoirs never reached<br />
temperature in excess to 80°C, thus accounting for<br />
dominantly early diagenetic features. However,<br />
potential reservoirs in deeper, still untested horizons<br />
are likely to have reached temperatures in the range<br />
of 120-140°C, <strong>and</strong> thus, are likely to display highly contrasted paragenetic assemblages,<br />
involving the development of hydrothermal dissolution or high temperature dolomitic cements<br />
(saddle dolomite), two processes known elsewhere to develop secondary porosity.<br />
Fig.3: Total quantity of hydrocarbons generated<br />
118
KEYWORDS: source rock levels, TOC, 1D modeling with GENEX-GenTect software,<br />
hydrocarbons generated, secondary porosity<br />
REFERENCES<br />
Albpetrol, 1993. Petroleum exploration opportunities in Albania: 1st onshore licensing round in<br />
Albania. Publicity brochure, Western Geophysical, London.<br />
Curi F., 1993. Oil generation <strong>and</strong> accumulation in the Albanian Ionian basin. In Spencer A.M.,<br />
ed., Generation, accumulation <strong>and</strong> production of Europe's hydrocarbons, Springer, EAPG<br />
Spec. Publ., 3, 281-285.<br />
Curi F., Stamuli T., Dule A. et Gjermeni M., 1990. Geochemical conditions of hydrocarbon<br />
generation, migration <strong>and</strong> accumulation in carbonate <strong>and</strong> molasse deposits. Nafta dhe<br />
Gazi, Fieri, 97-111. (in Albanian)<br />
Danelian T. et Baudin F., 1990. Découverte d'un horizon carbonaté, riche en matière organique,<br />
au sommet des radiolarites d'Epire (zone ionienne, Grèce): le Monte de Paliambela. C. R.<br />
Acad. Sci., Paris, 311, II, 421-428.<br />
Danelian T., De Wever P. et Vrielynck B., 1986. Datations nouvelles fondées sur les faunes de<br />
Radiolaires de la série jurassique des Schistes à Posidonies (zone ionienne, Epire, Grèce).<br />
Rev. Paléobiol., Genève, 5, 1, 37-41.<br />
Diamanti F., Sadikaj Y., Zaimi L., Tushe I., Gjoka M., Prifti I. et Murataj B., 1995. Hydrocarbon<br />
potential of Albania. In 1965-1995, 30 years Oil <strong>and</strong> Gas Institute, Albpetrol ed., 300 p.<br />
Frasheri A., Kapedani N., Lico R., Canga B. et Jareci E., 1995. Geothermy of External<br />
Albanides. In 1965-1995, 30 years Oil <strong>and</strong> Gas Institute, Albpetrol ed., 300 p.<br />
Muska K., 2002. Termicité, transferts et diagenese des reservoirs dans les unités externes des<br />
albanides (Bassin ionien). Thèse de Doctorat, Paris VI.<br />
Roure F., Lafargue E., Müller C., Fili I., Muska K., Nazaj S., Seiti H., Cadet J.P., Bonneau M. et<br />
Mio I., 1998. Evolution structurale et pétrolière des Albanides externes. Résultats de la<br />
modélisation Thrustpack et des analyses géochimiques complémentaires. Rapport IFP<br />
report 44888 pour OGI. (confidentiel).<br />
Roure F., Nazaj S., Muska K., Fili I., Cadet J.P. et Bonneau M., 1999. Kinematic evolution <strong>and</strong><br />
petroleum systems: an appraisal of the Outer Albanides. In McKlay K., ed., Thrust<br />
tectonics 1999, in press.<br />
Roure F., Prenjasi E. et Xhafa Z., 1995. Petroleum geology of the Albanian thrust belt. Guide<br />
book to the Field Trip 7, AAPG, Nice, 50 p.<br />
Roure F. et Sassi W., 1995. Kinematics of deformation <strong>and</strong> petroleum system appraisal in<br />
Neogene forel<strong>and</strong> fold-<strong>and</strong>-thrust belts. Petroleum Geosciences, v. 1, p. 253-269.<br />
119
120
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
The MECHANICS of THRUST TECTONICS, the EVOLUTION of the<br />
ALBANIDES <strong>and</strong> IMPLICATIONS for HYDROCARBON<br />
EXPLORATION<br />
D.A. Nieuwl<strong>and</strong><br />
NewTec <strong>International</strong> B.V.<br />
4e Binnenvestgracht 13<br />
2311NT Leiden, The Netherl<strong>and</strong>s<br />
d.nieuwl<strong>and</strong>@newtec.nl; dnieuw@xs4all.nl .<br />
This presentation integrates geo-mechanical aspects of thrust tectonics with analogue models<br />
<strong>and</strong> with observations on the Albanides <strong>and</strong> other natural examples. It will be demonstrated<br />
that underst<strong>and</strong>ing the mechanics of such a dynamic deformation process as thrust tectonics<br />
holds the key to generating a predictive model regarding the location of the prospective thrust<br />
front of the Albanides. At a smaller scale, the complex internal structure of the Albanides <strong>and</strong><br />
the important fracture system are also largely governed by the geo-mechanical framework of<br />
the fold-<strong>and</strong>-thrust system.<br />
When studying a thrust tectonics system, it is good to realize that the mean stress of such a<br />
system is very high <strong>and</strong> that this has significant practical implications. This aspect is best<br />
illustrated with a Mohr circle diagram (Fig. 1). The Mohr circle example is constructed for a<br />
strong limestone at a reference depth of 1000 m. Note that the mode of failure of a strong<br />
Fig. 1. Formation of a thrust fault in a strong rock (e.g. cemented limestone) at a reference depth of 1000 m.<br />
121
ock in extension at the relatively shallow depth of 1000 m results in the formation of tension<br />
fractures (joints) <strong>and</strong> not in normal (shear) faults. Horizontal compression almost always<br />
results in the formation of shear fractures (faults). Thrust tectonics is the process of<br />
deformation by horizontal crustal shortening. The main compressive stress (!I) is horizontal,<br />
the intermediate stress (!II) is horizontal <strong>and</strong> parallel to the strike of the thrust faults the<br />
minimum stress (!III) is vertical. As a result the fault movements, in the (!I-!III) plain, are<br />
directed forwards <strong>and</strong> upwards. Thrusting is therefore often spectacularly expressed at the<br />
earth's surface by the formation of major topographic relief. The high mean stress is also<br />
expressed in high pore pressures in front of an advancing FTB <strong>and</strong> associated diagenetic<br />
effects in the forel<strong>and</strong>. Examples such as the Alps, Himalayas, Rocky Mountains, Zagros, the<br />
Andes <strong>and</strong> the Albanides speak for themselves. The Rocky Mountains, Zagros Mountains <strong>and</strong><br />
the Andes all are known to contain major hydrocarbon accumulations. However, hydrocarbon<br />
exploration in fold-<strong>and</strong>-thrust (FTB) belts is not as mature as in extensional or strike-slip<br />
basins. One of the reasons is, that seismic in mountainous terrains is notoriously difficult to<br />
acquire <strong>and</strong> often of poor quality. In addition to the difficulties with acquisition <strong>and</strong><br />
processing of the dominant exploration tool, the terrain <strong>and</strong> the structural geometries present<br />
an additional challenge for hydrocarbon explorers in FTB’s. S<strong>and</strong>box model examples are<br />
therefore very useful to assist seismic interpreters <strong>and</strong> geologists with conceptual models in<br />
their interpretation of the structural geometry <strong>and</strong> underst<strong>and</strong>ing of the kinematics of the<br />
complex FTB fault systems.<br />
Thrust belt deformation may involve basement (thick-skinned), or be limited to the<br />
sedimentary cover, which is detached from the basement (thin-skinned). Thrust faults form<br />
the outline of thrust sheets <strong>and</strong> are often associated with backthrusts. Backthrusts form as<br />
accommodation structures <strong>and</strong> do not have a detachment such as a full-scale thrust. Thrust<br />
sheets deform internally also by folding whereby two mechanisms can be recognized: - faultpropagation<br />
folding <strong>and</strong> fault-bend folding. On a smaller scale, calcite twinning <strong>and</strong> processes<br />
on atomic scale associated with dislocations in the crystal lattice can accommodate significant<br />
percentages of strain without the need for brittle failure.<br />
Ramp anticlines are fault-bend folds in the hanging-walls of thrust faults <strong>and</strong> are formed when<br />
thrust sheets are carried over flats <strong>and</strong> up ramps. The ramps are the actual thrust faults <strong>and</strong><br />
most commonly have a dip of about 30 o . In uniform stratigraphy <strong>and</strong> without additional<br />
complicating factors, thrust faults form sequentially with regular thrust sheet lengths <strong>and</strong><br />
spacing in normal-sequence from hinterl<strong>and</strong> to forel<strong>and</strong> <strong>and</strong> characteristically form duplexes<br />
(Fig. 2). Complications such as syn-tectonic sedimentation or variations in basal friction cause<br />
out-of-sequence thrusting. Thrust faults may be separated by folds (soft-links), or by oblique<br />
or lateral ramps (hard-links), <strong>and</strong> when the separation becomes very large, by tear faults.<br />
Traps are often complex <strong>and</strong> relatively small, although some giant accumulations in thrusted<br />
anticlines are known (e.g. Cusiana, Colombia; Beykan, Turkey). Seismic imaging is<br />
commonly a problem, due to the structural complexity <strong>and</strong> mountainous terrains. In general<br />
one can use as a rule of thumb that basement involvement is most frequent in the hinterl<strong>and</strong><br />
(close to the indentor, creating the horizontal compression) <strong>and</strong> diminishes progressively in<br />
the direction of the forel<strong>and</strong>. Locally, pre-existing rift structures can complicate the<br />
geometries, they may be difficult to detect. Gravity modeling <strong>and</strong> palinspastic reconstruction<br />
are useful techniques to help solving problems of this nature.<br />
The nature of the detachment is of great influence on the geometry <strong>and</strong> kinematics of thrust<br />
structures. A low-friction decollement results in long thrust sheets with a straight front <strong>and</strong><br />
many related backthrusts. A high-friction decollement results in short thrust sheets with a<br />
curved front <strong>and</strong> few or no backthrusts. Viscous or ductile non-viscous decollements such as<br />
respectively rock salt or clay, are both of a low-friction nature, but influence the thrust<br />
geometry in different ways. A change in basal friction from low to high has major<br />
122
consequences for the geometry <strong>and</strong> kinematics of a developing FTB. The Albanides are a<br />
good example of such effects <strong>and</strong> the implications for the overall geometry of the FTB <strong>and</strong> its<br />
consequences for hydrocarbon exploration.<br />
An analysis of the plate tectonic history of the Eastern Mediterranean, combined with a palaeo<br />
stress analysis provides the tectonic <strong>and</strong> geo-mechanical framework for the formation of the<br />
Fig. 2. 2D Seismic section E-W across the Albanides, showing anticlinal stacking <strong>and</strong> out-of-sequence<br />
deformation of thrusts <strong>and</strong> unconformities.<br />
Albanides. It will be demonstrated that the application of the regional analysis, integrated with<br />
the thrust mechanics provides the basics for the development of the exploration play concept<br />
for the Albanides <strong>and</strong> the Peri-Adriatic depression.<br />
The application of s<strong>and</strong>box model analogue experiments is an additional tool that can be<br />
applied with significant practical consequences. This has been done so for the Albanides<br />
where the FTB front can not advance to within the Peri-Adriatic Depression due to a sudden<br />
increase in basal friction. The general applicability of small scale analogue models to large<br />
scale equivalents will be demonstrated with examples where analogue model results <strong>and</strong> 3D<br />
seismic data can be compared. In-situ stress measurements <strong>and</strong> detailed video-laser data<br />
acquisition in analogue experiments of thrust tectonics will provide further inside in the<br />
geometry <strong>and</strong> kinematics of FTB’s <strong>and</strong> on associated erosion <strong>and</strong> sedimentation processes.<br />
The punctuated equilibrium in the kinematics of a moving critical taper, as demonstrated with<br />
analogue model experiments, is expressed in maximum <strong>and</strong> minimum erosion <strong>and</strong><br />
sedimentation periods, which are in turn expressed in the clastic sediments as turbidites in<br />
front of the advancing FTB.<br />
123
Fig. 3. In-situ stress measurements of the horizontal stress in a thrust tectonics analogue model experiment.<br />
S tress peak marks the formation of a thrust fault at the moment of break-through at the surface.<br />
Literature<br />
Jaeger, J.C & Cook, N.G.W., 1979. Fundamentals of rock mechanics. London, Chapman <strong>and</strong><br />
Hall, 590 pp. ISBN 0-412-22010-5.<br />
Lacombe O. <strong>and</strong> Roure F., 2009. ‘From paleostresses to paleoburial in fold-thrust belts :<br />
preliminary results from calcite twin analysis in the Outer Albanides’. Tectonophysics,<br />
Special Issue on “Vertical movements, subsidence <strong>and</strong> uplift”.<br />
M<strong>and</strong>l, G. 1988. Mechanics of tectonic faulting. Models <strong>and</strong> basic concept. Developments in<br />
Structural Geology 1, H. Zwart (Ed), Elsevier, 407 pp.<br />
Nieuwl<strong>and</strong> D.A., Leutscher J.H. <strong>and</strong> Gast J.. 'Wedge equilibrium in fold-<strong>and</strong>-thrust belts.<br />
Prediction of out-of-sequence thrusting, based on s<strong>and</strong>box experiments <strong>and</strong> natural examples'.<br />
Geologie en Mijnbouw 2000, v79/1, pp.81-91.<br />
Nieuwl<strong>and</strong> D.A., Oudmayer B. <strong>and</strong> Valbona U.. 'The tectonic development of Albania:<br />
explanation end prediction of structural styles. Marine <strong>and</strong> Petroleum Geoscience, v18, pp.<br />
161-177, 2000.<br />
Nieuwl<strong>and</strong> D.A., Urai J. <strong>and</strong> Knoop M.. 'In-situ stress measurements in model experiments of<br />
tectonic faulting.' Springer Verlag, 2000. In: Aspects of Tectonic Faulting'. Springer Verlag,<br />
1999. F.Lehner <strong>and</strong> J.Urai (Eds).<br />
Verschuren M., Nieuwl<strong>and</strong> D.A. <strong>and</strong> Gast J.. 'Multiple detachment levels in thrust tectonics:<br />
s<strong>and</strong>box experiments <strong>and</strong> palinspastic reconstruction.'. In: Buchanan P.G. & Nieuwl<strong>and</strong> D.A.<br />
(Eds.) Modern developments in structural interpretation, validation <strong>and</strong> modelling', Geol. Soc.<br />
Special Publication No. 99, pp 202-227.<br />
124
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
The STRONGEST EARTHQUAKES OCCURRED in ALBANIA during 2009<br />
(M>5.0) <strong>and</strong> their SEISMOGENIC ZONES<br />
ORMENI Rr (1), DAJA Sh (2) <strong>and</strong> DODA V (1),<br />
(1) Institute of Geosciences, Polytechnic University, Tirana, “Don Bosko” street, Nr.60<br />
E-mail rrapo55@yahoo.com<br />
(2) Polytechnic University, Mining <strong>and</strong> Geology Faculty, Tirana, “Elbasani” street,<br />
Two of the strongest earthquakes in Albania during 2009 have occurred in Lezha-Ulqini <strong>and</strong><br />
Lushnje-Elbasani-Dibra seismogenetic zones. First earthquake of magnitude (ML=5.0) <strong>and</strong><br />
intensity (I0 = VI degree) occurred on August 21, 2009, in Adriatic Sea <strong>and</strong> second<br />
earthquake of September 6, 2009 (ML = 5.4) <strong>and</strong> intensity (I0 = VII degree), occurred in<br />
Gjorica, south of the city of Peshkopia, Albania. These earthquakes express the increased<br />
seismic activity during 2009 of the Lezha- Ulqini <strong>and</strong> Elbasan- Dibra seismogenetic zones.<br />
We present results from an analysis of local <strong>and</strong> regional data concerning epicenter location,<br />
focal mechanism of main shock <strong>and</strong> its aftershock activity.<br />
Composite focal mechanism of the main shock occurred on August 21 show a thrust fault:<br />
Strike=158°, Dip=50° <strong>and</strong> Rake (Slip)=90°. From the focal mechanism solution results that<br />
the earthquake of August 21, 2009 was triggered from a pure thrust fault with an NE-SW<br />
compression stress direction. The fault plane, has a dip 50° <strong>and</strong> has a trend NW-SE <strong>and</strong> is<br />
associated with the activation of the Ionian-Adriatic Sea deep fault zone of the earth crust at<br />
the border of the platform of the Adriatic Sea with orogen. The aftershock occurred<br />
northeastern of the main shock epicenter almost parallel of coastal line. The tectonic lines of<br />
Lezha-Ulqini seismogenic zone have served as structuring <strong>and</strong> discharge lines of seismic<br />
energy. In some cases where seismic energy flux failed to discharge through these lines, the<br />
process is accompanied by reverse faults, as is that of Ulqini area..<br />
The focal mechanism of main shock occurred on September 6, has the parameters: strike<br />
219°, dip 40°, rake -90°, shows a normal active fault or fault zone with the extension axes in<br />
the NW SE direction. The aftershocks of main shock continued with a lower frequency as<br />
well as with lower magnitude values from September 9, 2009 <strong>and</strong> on. Mostly the foci of these<br />
secondary events are located in SW part of the epicenter zone, with a depth ranging from 1-<br />
29 km. This area is characterized by a complex geomorphology <strong>and</strong> in addition, has been hit<br />
by numerous earthquakes.<br />
During the last century some devastating earthquakes occurred in these seismic source zones,<br />
causing a great number of casualties <strong>and</strong> substantial damage. The epicenter of earthquake<br />
occurred on August 21, 2009 was situated on the Adriatic Sea 17 km West from Albania<br />
border <strong>and</strong> as a consequence has not damages. The earthquake occurred on September 6,<br />
2009 about 19 km south of the city of Peshkopia, caused more heavily damage in Gjorica,<br />
Qerenec villages <strong>and</strong> Shupenza municipality in Dibra district. The main event is a shallow<br />
one, with the hypocentral depth at 7.6 km. This fact explains the localized destruction in the<br />
epicentral zone.<br />
125
126
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
1D-VELOCITY MODELS <strong>and</strong> LATERAL CONTRASTS in ZONES DIVIDED<br />
by SHKODER-PEJA FAULT (ALBANIA)<br />
ORMENI Rr (1) <strong>and</strong> NAZAJ Sh (2)<br />
(1) Polytechnic University, Institute of Geosciences, Tirana, “Don Bosko” street Nr.60,<br />
rrapo55@yahoo.com<br />
(2) Polytechnic University, Mining <strong>and</strong> Geology Faculty, Tirana, “Elbasani” street,<br />
The Shkoder-Peja transversal deep fault of northeastern direction founded since the<br />
beginning of the Alpine cycle: during neotectonic stage, in the Pliocene-Quaternary, it<br />
was reconstructed with garben Gomsiqe-Puka-Iballa <strong>and</strong> Bajram Curri depression<br />
situated along it. This fault zone is potential transversal seismogenic belt in Albania <strong>and</strong><br />
nearby. In the past centuries strong earthquakes have been generated at the extremities of<br />
this fault. In the future it is expected to generate strong earthquakes for the Shkoder-Peja<br />
deep fault of powerful structural reconstruction during the Pliocene-Quaternary.<br />
1D-velocity models of zones crosses by Shkodra-Peja deep transversal fault are<br />
computed at VELEST software of system SEISAN, inverting re- depths. The<br />
interpretation of the obtained 1D velocity models allows us to infer picked P-wave <strong>and</strong> Swave<br />
arrival time recorded in period of time 2002-2009 by the Albanian, Montenegro,<br />
<strong>and</strong> Macedonia seismic networks. Smooth velocity gradients with depth <strong>and</strong> low P-wave<br />
velocities are observed beneath two half-spaces crosses by Shkodra-Peja of the Albania<br />
Orogen.<br />
The lateral velocity difference in zones crosses this fault are as large as 2-6% <strong>and</strong> disturb<br />
in depth 0-30 km. The localizations based on 1D velocity models in presence of 2D or 3D<br />
velocity in homogeneities will be systematically shifted in the direction of increasing<br />
velocities. Since the difference increases with depth, the hypocenters are not only offset<br />
from the real fault but seem to mark even a slightly inclined fault, which is not the case.<br />
Precisely this is the cause for larger systematic misallocation <strong>and</strong> the determined fault to<br />
be deviated from the real fault.<br />
We defined reference velocity models for these zones for better constrain the hypocentral<br />
determination, in particular the hypocentral depths<br />
The interpretation of the obtained 1D velocity models <strong>and</strong> lateral velocity differences<br />
across Lushnje-Elbasan-Diber deep fault zones allows us to infer interesting features on<br />
the deep structure of the northen Albania. These results represent a first step towards<br />
more detailed Seismotectonic analyses.<br />
127
128
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
An INTEGRATED STUDY of the MØRE-TRØNDELAG FAULT COMPLEX,<br />
MID NORWAY<br />
Christophe PASCAL (1) , Aline SAINTOT (1) , A. NASUTI (1,2) , E. LUNDBERG (3) <strong>and</strong> C.<br />
JUHLIN (3)<br />
(1)<br />
NGU, Geological Survey of Norway (Christophe.pascal@ngu.no)<br />
(2)<br />
Department of Petroleum Engineering <strong>and</strong> Applied Geophysics, NTNU, Trondheim,<br />
Norway<br />
(3)<br />
Department of Earth Sciences, Uppsala University, Sweden<br />
The Møre-Trøndelag Fault Complex is one of the most prominent fault zones of Norway,<br />
onshore <strong>and</strong> offshore (Gabrielsen et al. 1999 <strong>and</strong> references therein). It strikes ENE-WSW,<br />
paralleling the coastline of south central Norway, <strong>and</strong> separates the northern North Sea basin<br />
system from the deep Mesozoic Møre <strong>and</strong> Vøring Basins. Onshore, the MTFC can be traced<br />
from the Møre region northeastwards along the northern margin of the Western Gneiss<br />
Region (WGR), <strong>and</strong> across the Grong–Olden Culmination towards the Børgefjell Basement<br />
Window, where it dies out in a horsetail splay (Fig. 1, Roberts 1998).<br />
Fig. 1: The Møre-Trøndelag Fault Complex as ENE-WSW topographic lineaments seen on a<br />
false colored RGB L<strong>and</strong>sat TM mosaic (b<strong>and</strong> ratio R=5/4, G=3/1, B=5/7).<br />
During the Caledonian Orogeny, high ductile strain <strong>and</strong> the subsequent development of a<br />
steep ENE-WSW planar ductile fabric in the Precambrian high grade metamorphic (mostly<br />
129
gneissic) rocks occurred on the northern part of the WGR. The MTFC as discrete sinistral<br />
ENE-WSW steep ductile shear zones (Robinson, 1995) formed probably during the Sc<strong>and</strong>ian<br />
Orogeny towards the end of the Caledonian Cycle, since it slices through several of Sc<strong>and</strong>ian<br />
thrust sheets (Grønlie <strong>and</strong> Roberts 1989). The fault complex has been repeatedly reactivated<br />
in the brittle domain from Devonian time to the Cenozoic (?) <strong>and</strong> exhibits a great variety of<br />
fault rocks, exposed mostly on the Fosen Peninsula (i.e. Verran <strong>and</strong> Hitra-Snåsa faults, Watts<br />
2001 <strong>and</strong> references therein). These comprise mylonites overprinted by recrystallised breccias<br />
with quartz <strong>and</strong> epidote veining, phrenite-matrixed cataclasites, cut by zeolite/calcite veining<br />
associated with brecciation, pseudotachylites <strong>and</strong> zeolite-calcite slickenfibres. The complexity<br />
<strong>and</strong> variety of fault rocks reflects the longevity of the MTFC. The different fault rocks reveal<br />
the strength evolution of the fault complex <strong>and</strong> suggest significant weakening of some of its<br />
segments by repeated reactivation (see discussion in Pascal & Gabrielsen 2001). This applies<br />
to some of the primary segments of the present-day MTFC. Some segments of the southern<br />
onshore MTFC do not display such a cortege of fault rocks <strong>and</strong> exhibit, in turn, a restricted<br />
variety of fault rocks <strong>and</strong> associated mineralogy (Saintot & Pascal 2010). While epidote<br />
which might be the marker of the Devonian deformation, is widespread along the northern<br />
onshore segments of the MTFC, the southern segments are laumontite-rich <strong>and</strong> hence, are<br />
believed to represent the latest propagation (presumably Late Jurassic) <strong>and</strong> widening of the<br />
MTFC.<br />
Structural mapping in combination with analytical dating techniques have revealed three main<br />
phases of activity along the MTFC (Grønlie & Roberts 1989, Séranne 1992, Sherlock et al.<br />
2004): (1) Early Devonian sinistral strike-slip characterised by semi-ductile deformation, (2)<br />
Early Permian sinistral transtension <strong>and</strong> (3) Late Jurassic (to Early Cretaceous?) normal dipslip<br />
to dextral strike-slip. Normal dip-slip reactivation of the MTFC is assumed to have<br />
occurred in Cenozoic times (Redfield et al. 2005) but to date no clear evidence has been found<br />
yet. The three first phases of fault activity reflect, respectively (Gabrielsen et al. 1999): (1) the<br />
collapse of the Caledonian mountain chain, (2) widespread Permian rifting <strong>and</strong> (3) Late<br />
Jurassic rifting of the northern North Sea <strong>and</strong> the Mid-Norwegian margin. The MTFC appears<br />
to have exerted a strong influence on the evolution of the offshore basins, in particular in<br />
controlling their structural <strong>and</strong> depositional styles though time (Osmundsen et al. 2006). The<br />
fourth phase of activity of the fault complex was linked to the postulated uplift of the<br />
Norwegian mountains while the offshore basins were subsiding in Cenozoic times (Redfield<br />
et al. 2005). The MTFC appears to have strongly controlled the evolution of the l<strong>and</strong>scape<br />
onshore, including the creation of preferential pathways for Quaternary glaciers. The MTFC<br />
is still seismically active today (Olesen et al. 2004). By means of numerical modelling, Pascal<br />
& Gabrielsen (2001) suggested that it acts as a very weak zone, resulting in disparate stress<br />
patterns to the north <strong>and</strong> south. Recent observations of stress-induced features <strong>and</strong> in-situ<br />
stress measurements support the modelling results (Roberts & Myrvang 2004).<br />
Little is known about the deep structure (e.g. dip directions of the faults), the links with the<br />
offshore fault segments <strong>and</strong> the precise kinematics <strong>and</strong> segmentation of the whole MTFC. The<br />
aims of the ongoing “MTFC integrated” project are (1) to reveal the deep structure of the<br />
MTFC using geophysical methods, (2) to investigate its offshore prolongation <strong>and</strong> (3) to study<br />
its kinematics <strong>and</strong> structural evolution. We use a large panel of geophysical methods,<br />
including gravimetry, magnetic profiling, shallow EM methods <strong>and</strong> seismic<br />
reflection/refraction profiles constrained by petrophysical sampling <strong>and</strong> structural<br />
observations. Our geophysical observations <strong>and</strong> experiments show that the MTFC onshore<br />
bounds a major horst structure similar to the ones evidenced by long-range seismic profiling<br />
offshore (Lundberg et al. 2009). Analysis of regional magnetic <strong>and</strong> gravity analysis allows for<br />
130
tracing the MTFC as curved system linking with the major detachments of the Møre Basin<br />
(Nasuti et al. 2010).<br />
In addition, fault slip analyses have been carried out on more than 200 fault planes. MTFCparallel<br />
slickensided planes developed along the ENE-WSW trending metamorphic foliation.<br />
The foliation was favourably dipping <strong>and</strong> orientated to be the locus of shear. Also we propose<br />
that the main fault segments which are deeply buried in the fjords dip strictly parallel to the<br />
foliation of the surrounding bedrocks. Normal kinematics <strong>and</strong> resulting extensional stress<br />
tensors are prominent. However, a non negligible amount of oblique normal slips along the<br />
parallel-to-foliation faults testifies for the strong control of the ductile planar fabric in the<br />
development of the faults <strong>and</strong> the accommodation of deformation.<br />
References<br />
Gabrielsen, R.H., Odinsen, T., & Grunnaleite, I., 1999. Structuring of the Northern Viking Graben<br />
<strong>and</strong> the Møre Basin; the influence of basement structural grain <strong>and</strong> the particular role of the Møre<br />
Trøndelag Fault Complex. Mar. & Pet. Geol., 16, 443–465.<br />
Grønlie, A., & Roberts, D., 1989. Resurgent strike–slip duple development along the Hitra–Snasa<br />
<strong>and</strong> Verran faults, Møre–Trøndelag fault zone, central Norway. J. Struct. Geol., 11, 295–305.<br />
Lundberg, E., Nasuti, A. & Juhlin, C., 2009. High resolution reflection seismic profiling over the<br />
Møre- Trøndelag Fault Complex, Norway. EGU 2009, Vienna.<br />
Nasuti, A., Ebbing, J., Pascal, C., Tønnesen, J.F. & Dalsegg E., 2010. Using Geophysical Methods<br />
to Characterize a Fault Zone – A Case Study from the Møre-Trøndelag Fault Complex, Mid-<br />
Norway. EAGE 2010, Barcelona.<br />
Olesen, O., et al., 2004. Neotectonic deformation in Norway <strong>and</strong> its implications: a review.<br />
Norwegian Journal of Geology, 84, 3-34.<br />
Osmundsen, P.T., et al., 2006. Kinematics of the Høybakken detachment zone <strong>and</strong> the Møre-<br />
Trøndelag Fault Complex, central Norway. J. Geol. Soc. London, 163, 303-318.<br />
Pascal, C., & Gabrielsen, R.H., 2001. Numerical modelling of Cenozoic stress patterns in the Mid<br />
Norwegian Margin <strong>and</strong> the northern North Sea, Tectonics, 20, 585-599.<br />
Redfield, T.F., et al., 2005. Late Mesozoic to Early Cenozoic components of vertical separation<br />
across the Møre–Trøndelag Fault Complex, Norway. Tectonophysics, 395, 233– 249.<br />
Roberts, D., 1998. high-strain zones from meso- to macro-scale at different structural levels, Central<br />
Norwegian Caledonides. J. Struct. Geol., 20, 111-119.<br />
Roberts, D., & Myrvang, A. 2004. Contemporary stress orientation features <strong>and</strong> horizontal stress in<br />
bedrock, Trøndelag, central Norway. NGU Bulletin 442, 53-63.<br />
Robinson, P., 1995. Extension of Trollheimen tectono-stratigraphic sequence in deep synclines near<br />
Molde <strong>and</strong> Brattvåg, Western Gneiss Region, southern Norway. Norwegian Journal of Geology 75,<br />
181-198.<br />
Saintot, A. & Pascal, C., 2010. A contribution to the kinematics of the Møre-Trøndelag Fault<br />
Complex (Western Norway). EGU 2010, Vienna.<br />
Sherlock, S.C., et al., 2004. Dating fault reactivation by Ar/Ar laserprobe; an alternative view of<br />
apparently cogenetic mylonite-pseudotachylite assemblages. J. Geol. Soc. London, 161, 335-338.<br />
Séranne, M., 1992. Late Paleozoic kinematics of the Møre-Trøndelag Fault Zone: <strong>and</strong> adjacent areas,<br />
Central Norway. NGT, 72, 141-158.<br />
Watts, L.M., 2001. The Walls boundary Fault Zone <strong>and</strong> the Møre-Trøndelag Fault complex: a case<br />
study of two reactivated fault zones. Unpublished PhD thesis, University of Durham, U.K., 550 pp.<br />
131
132
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
STRATIGRAPHIC CORRELATION of RADIOLARIAN CHERTS BELONGING to<br />
the OPHIOLITE-BEARING <strong>and</strong> the CARBONATIC SUCCESSIONS<br />
Mensi PRELA<br />
(oral presentation)<br />
Polytechnic University of Tirana; Faculty of Geology <strong>and</strong> Mining, Earth Sciences Department<br />
The Jurassic radiolarian cherts of Albania are included both in the ophiolitic successions of<br />
the Mirdita zone (Kalur Cherts), which have been interpreted as remains of the Tethyan<br />
oceanic lithosphere, <strong>and</strong> in carbonate successions presumably deposited on the continental<br />
margin of the Tethys.<br />
The data available on the radiolarian cherts of Albania are summarized <strong>and</strong> updated in this<br />
paper. The data from 12 sections of radiolarian cherts belonging to the ophiolite-bearing<br />
successions are examined <strong>and</strong> compared with data from 14 sections of radiolarian cherts<br />
belonging to the carbonate (pelagic <strong>and</strong> paltformic) successions.<br />
Stratigraphical data of the top of the ophiolite sequence <strong>and</strong> of the carbonate peripheral units<br />
indicate their similar paleogeographical conditions <strong>and</strong> close relations between them.<br />
133
134
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
The AGE of the RADIOLARIAN CHERTS in the WESTERN CARBONATE<br />
PERIPHERAL UNITS of the ALBANIAN OPHIOLITES<br />
Mensi PRELA<br />
(poster presentation)<br />
Polytechnic University of Tirana; Faculty of Geology <strong>and</strong> Mining, Earth Sciences Department<br />
In this paper we examined radiolarian assemblages in six sections of chert levels intercalated<br />
in carbonate successions of the Mesozoic Albanide continental margin: Porava, Karma,<br />
Shushica, Derstila, Vithkuqi <strong>and</strong> Barmashi.<br />
In Shushica, Karma, Barmashi <strong>and</strong> Vithkuqi sections radiolarian cherts rest directly on the<br />
platformal thick-bedded, stromatolitic limestones, or on the condensed nodular limestones<br />
laying above the stromatolitic limestones. In Porava <strong>and</strong> Derstila sections radiolarian cherts<br />
rest on the cherty limestones.<br />
The age of the radiolarian cherts in examinated sections can be related to Middle Jurassic.<br />
The ages of the radiolarian assemblages determined in the cherts of the carbonate successions<br />
are the following:<br />
Porava - Latest Bajocian-Early Bathonian to Middle Bathonian (5-6 UAZ)<br />
Karma – Early Bajocian to Latest Bajocian-Early Bathonian (4-5 UAZ)<br />
Shushica - Latest Bajocian-Early Bathonian (5 UAZ)<br />
Derstila – Latest Bajocian-Early Bathonian to Middle Bathonian (5-6 UAZ)<br />
Vithkuqi – Middle Bathonian (UAZ 6)<br />
Barmashi - Latest Bajocian-Early Bathonian (5 UAZ)<br />
135
136
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
HYDROCARBON OCCURRENCES <strong>and</strong> PETROLEUM GEOCHEMISTRY of<br />
ALBANIAN OILS<br />
Irakli PRIFTI <strong>and</strong> Kristaq MUSKA<br />
(Polytechnic University of Tirana)<br />
A wide range of geochemical data from Albanian oils have been collected, documented <strong>and</strong><br />
reviewed.<br />
Oil generation has occurred in two phases, first during an Early Miocene phase when the<br />
source rocks were in early stage to main part of the oil maturity window, <strong>and</strong> later during the<br />
Pliocene, when the advanced stage of oil generation was reached. The multi-phase generation<br />
has resulted in hydrocarbon accumulations with a wide range of geochemical<br />
characteristics. In individual fields or field complexes, heavy oils, both biodegraded <strong>and</strong><br />
non-biodegraded, light oils, condensates, wet <strong>and</strong> dry gas may occur. In general, oil density<br />
sulphur content decrease with depth.<br />
Oil groupings are evident from the data set, although stable carbon isotope values suggest that<br />
the oils from the Berat Belt <strong>and</strong> the oils from the Preadriatic Depression could be separated<br />
from the majority of oils in the Kurvaleshi Belt. No correlations between oils <strong>and</strong> individual<br />
carbonate source rock levels could be established.<br />
The Tertiary humic source rock is probably early mature, <strong>and</strong> has generated dry gas <strong>and</strong><br />
some condensate. The gas accumulations in the Preadriatic Depression contain mostly<br />
biogenic gas <strong>and</strong> mixed thermogenic/biogenic gas. The deeper clastic reservoirs contain<br />
relatively less dry gas, <strong>and</strong> less non-hydrocarbon gas.<br />
GEOLOGICAL FRAMEWORK<br />
The geology of the Albanides is characterized by complex structural features resulting from<br />
westward overthrusting, Appendix A: Geologic Section A-A' west to east in northern Albania<br />
<strong>and</strong> Geologic Section B-B' north-northwest to south southeast through oil fields in central<br />
Albania with major stratigraphic units illustrated. The geological <strong>and</strong> tectonic frameworks are<br />
similar to the Italian Adriatic province (Curi, F. t 1993). The geologic setting of Albania can<br />
be broadly divided into the thrust belt(s), the foredeep, <strong>and</strong> the forel<strong>and</strong> domains. The<br />
Albanian study area consists of the Pre-Adriatic Depression <strong>and</strong> three external Albanide<br />
geotectonic zones: (from west to east) Sazani, Ionian, <strong>and</strong> Kruja, Map 1. In Greece, the three<br />
geotectonic zones, Pre-Apulian, Ionian, <strong>and</strong> Gavrovo, occur in front of the major westdirected<br />
Pindus thrust fault <strong>and</strong> have been defined oa the basis of different sedimentary facies<br />
of exposed Mesozoic: <strong>and</strong> Cenozoic rocks <strong>and</strong> on different tectonic styles. The current<br />
structure of the External Albanides is a result of the collision of the Adria continental margin<br />
with the European plate.<br />
The Albanian thrust belt includes the Krasta (a fourth <strong>and</strong> easternmost zone), Kruja, <strong>and</strong><br />
137
Ionian zones. The thrust belt is characterized by successive folds of the ancestral Ionian basin<br />
sediments that have been thrust westward. The Krasta zone's most important compressional<br />
tectonic phase took place during Late Eocene while Kruja zone thrusting occurred during<br />
Middle Oligocene <strong>and</strong> Ionian zone thrusting occurred during the Middle Miocene. The Ionian<br />
Zone's Berati Belt underwent compression during Upper Oligocene-Lowermost Miocene<br />
(Aquitanian) whereas the Kurveleshi <strong>and</strong> Cika Belts were thrust-folded at the end of the Lower<br />
Miocene.<br />
The geology of each hydrocarbon bearing zone is discussed in more detail below. The<br />
sediment Ethologies for the Pre-Adriatic Depression <strong>and</strong> the External Albanide zones are<br />
summarized in Appendix B: Stratigraphic Columns for the External Albanides <strong>and</strong> the Pre-<br />
Adriatic Depression.<br />
W<br />
Patos-Marinza oilfields<br />
HYDROCARBON OCCURRENCES<br />
Figure 1: Oilfields from Patos-Marinza <strong>and</strong> Kuçova.<br />
Kuçova oilfield<br />
Many oil <strong>and</strong> gas accumulations, asphalt veins, oil-stained rocks, <strong>and</strong> gas seeps exist in<br />
Albania. They are part of a broader belt of scattered hydrocarbon fields <strong>and</strong> seepages on both<br />
sides of the Adriatic Sea <strong>and</strong> the Ionian Sea.<br />
In Albania, the oil discoveries are concentrated in the thrust belt's Ionian Zone <strong>and</strong> in the Pre-<br />
Adriatic Depression. Within the Ionian Zone most of the commercial oil fields occur in the<br />
Kurveleshi Belt.<br />
The Marinza oil field is the largest producing field in Albania. Marinza has several productive<br />
beds for every reservoir suite. The reservoirs are Tortonian <strong>and</strong> Messinian s<strong>and</strong>stones that<br />
overlie thrust anticlines of eroded limestones at the Intra-Miocen Unconformity. The oil<br />
migrates from limestone reservoirs into s<strong>and</strong>s <strong>and</strong> s<strong>and</strong>stones in the oil fields of the Pre-<br />
Adriatic Depression. The formation water salinities in s<strong>and</strong>stone deposits are typically<br />
between 20 g/L <strong>and</strong> 30 g/L (20,000-30,000 ppm) <strong>and</strong> decrease with depth. Thus, meteoric<br />
water may be moving through the deposits. The average salinities in fields with carbonate<br />
reservoirs are between 40 g/L <strong>and</strong> 70 g/L (40,000-70,000 ppm).<br />
The largest oil accumulation in limestone reservoirs occurs in the Cakran field. Cakran is<br />
estimated to have 1000 m of structural closure of condensate <strong>and</strong> light oil pay (49° API). The<br />
limestone oil fields of Albania have normal pressures <strong>and</strong> typically low reservoir<br />
temperatures (35°C to 94°C with the highest being in the exceptional Vlora structure <strong>and</strong><br />
measured at 4550m). The geothermal gradient in Albania is usually very low at 1.6°C/100m.<br />
In oil fields with limestone reservoirs, non-hydrocarbon gases comprise 1.8% to 15.0% of the<br />
138<br />
E
gas with hydrogen sulfide concentrations that range from 0.5% to 10.0% of the total gas. Three<br />
oil field trends exist in the Kurveleshi Belt in the central part of the Ionian Zone(figure 2):<br />
Figure 2. Albanian oil fields in limestones section<br />
139
1. In the west: Amonice-Gernec-Gorsht/Kocul.<br />
2. In the center: Mollas-Cakran-Kreshpan.<br />
3. In the east: Karbunare-Hekali-Ballshi-Visoke-Sheqishte-Kallm/Verri/Kolonje.<br />
Additional Kurveleshi Belt hydrocarbon accumulations that occur in the southern part of<br />
Albania include Delvina (condensate) <strong>and</strong> Finiq-Krane (gas <strong>and</strong> oil).<br />
Commercial oil fields have been discovered in the Pre-Adriatic Depression. Oil fields include<br />
the Patos/Marinza/Bubullima/Kolonje complex, the Pekisht/Rasa/Murizi complex- <strong>and</strong><br />
Kuçova.<br />
PETROLEUM GEOCHEMETRY RESULTS <strong>and</strong> DISCUSSION<br />
Many crude oils, oil show extracted liquids, <strong>and</strong> oil seep samples representative of all<br />
major Albanian oils have been selected for geochemical characterization. The samples are<br />
identified by their respective well (or outcrop location), field, producing interval, reservoir<br />
lithology, geographic/geologic zone <strong>and</strong> zone belt.<br />
Geochemical results will be discussed in the following order: oil characterizations <strong>and</strong> oil<br />
grouping.<br />
CRUDE OIL PROPERTIES<br />
Bulk crude oil properties, chemical compositions, stable carbon isotopic compositions,<br />
<strong>and</strong> selected isoprenoid <strong>and</strong> n-paraffin parameters (e.g., Pristane/Phytane, Pristane/nC17,<br />
Phytane/nC 18)<br />
from whole oil gas chromatograms (GC). Oil characteristics vary broadly<br />
for Albania's production oils. API gravities range from 57° API to 10° API (densities<br />
from 0.75 to 1.0 g/mL). The current properties reflect the combined effects of the<br />
respective source rock kerogen characteristics, source rock thermal maturities at the time<br />
of hydrocarbon expulsion, <strong>and</strong> local bacterial degradation/water washing.<br />
BlODEGRADATION<br />
The heavy oils <strong>and</strong> moderately heavy oils from Kreshpani-3 (10.7°API; S=4.9%),<br />
Bubullima-42 (12.5°API; S=5.6%), Ferma-30 (18.5°API; S=4.3%), <strong>and</strong> Rasa-8<br />
(21.1°API; S=3.8%) show no sign of biodegradation, <strong>and</strong> their moderately high benzene<br />
<strong>and</strong> toluene contents indicate water washing effects are minimal, (whole oil gas<br />
chromatograms). A number of oils in Albania contain moderately high concentrations of<br />
sulfur. A correlation exists between higher sulfur concentrations <strong>and</strong> lower API gravities<br />
<strong>and</strong> Figure 3 illustrates Albanian oil data.<br />
Biodegradation has affected several oil accumulations in Albania (e.g., from wells Drashovica-<br />
33, Vlora-10 oil show, Ballshi-55, Gorisht-77, Marinza-1850, Vurgu-7, Arza-16, Patos -1449,<br />
Kozare-568, Kreshpani-4, Panaja-10, Povelca-lB, <strong>and</strong> the Kuçova seep) <strong>and</strong> has probably<br />
lowered the API gravities from their intrinsic values; but the respective kerogen chemical<br />
compositions remain the principal control of final oil gravities. For heavy, high sulfur,<br />
biodegradation causes minimal changes in API gravities <strong>and</strong> total sulfur contents because the<br />
original n-paraffin contents are a low percentage of the crude oil.<br />
140
GROUPING of ALBANIAN OILS<br />
Oils from Albanides are grouped on the basis of the geochemical properties, geographical <strong>and</strong><br />
geological location. According to their properties are divided six families oils <strong>and</strong> subgroups<br />
within them:<br />
1. First family met in the gas fields, appears in the form of condensates, <strong>and</strong> is immature.<br />
Their origin is related to the resinites derived from terrestrial plants.<br />
2. The second family includes oils from Tirana- Ishmi depression, are met from shallow wells.<br />
Isotopic ratio is higher <strong>and</strong> his value fluctuates around -22 0 / 000.<br />
3. The third family, represented by the oil meeting in the southern Ionian area. In this family<br />
includes oils from wells; Prishta-14, Vurgu-7 <strong>and</strong> condensates from Delvina. Characterized by<br />
the stable carbon isotopic ratio that fluctuates around -26 0 / 000 <strong>and</strong> predominate diasterane to<br />
sterane (Delvina, Vurgu-7). In this family shared three subgroups oils:<br />
1.Delv.-4, Delv.-12;<br />
2. Prishta-1;<br />
3. Vurgu-7;<br />
141
4. A family of four, including all Albanian oils, the stable carbon isotopic ratio fluctuate in<br />
value -27 0 / 000 ÷ -29 0 / 000 <strong>and</strong> Diasteranes/Regular sterane is lower, with the exception of oil that<br />
we get the well-Kreshpan 3. This family includes six subgroups oil:<br />
1. Amon-16,Gor-77, Ballsh-55, Patos-1449,Vis-177,Hek-10,Hek-12;<br />
2. Cakran-18,Cakran-47;<br />
3. Marinza-952,1850; Bub-42;<br />
4. Kolonja-691, Kreshpan-3;<br />
5. Kozara-568, Rasa-8, Arza-16, Ferma-30;<br />
6. Drashovic-33, Vlora-11, Kreshpan-4.<br />
Subgroup oil "5" distinguished from others as are generated by source rocks with high content of<br />
clay fraction.<br />
5. The fifth family includes oil well received in Vlora-10 <strong>and</strong> signs of oil meeting in the salt<br />
mine in Dhrovjan. Raporti isotopik i karbonit ne fraksionin aromatik dhe metano-naftenik<br />
luhatet ne vlera te ulta -29.5 0/000 ÷ -32 0/000 . the stable carbon isotopic ratio in aromatics<br />
<strong>and</strong> saturates hydrocarbon fluctuate in value -29.5 0 / 000 ÷ -32 0 / 000.<br />
6. Family of six oil represented only in well get Zvernec-3. Oil might be the rare honor since<br />
its composition Diasteranes missing.<br />
CONCLUSION<br />
In Albania, oilfields are concentrated in the thrust belt's Ionian Zone <strong>and</strong> in the Pre-Adriatic<br />
Depression. Within the Ionian Zone most of the commercial oil fields occur in the Kurveleshi<br />
Belt within limestone section. While oilfields from Pre-Adriatic Depression occur in<br />
142
s<strong>and</strong>stones of Miocene deposits.<br />
Albanian crude oils are included in different thermal maturities, some with higher thermal<br />
maturities tend to have higher API gravities if all other factors are the same. However, other<br />
causal factors clearly play important roles. For example, API gravities are about the same for<br />
the oils from the Marinza-952 well, the Prishta-1 well, <strong>and</strong> the Vlora-11 well (API - 32-9°,<br />
33.5°, <strong>and</strong> 30.4°, respectively); however, their thermal maturities range from the main phase of<br />
oil generation to advanced oil window maturity. The thermal maturity of the Kreshpani-3 well's<br />
oil is virtually identical to the maturity of the Prishta-1 well's oil, but the sulfur contents are<br />
very different (S - 4.89% <strong>and</strong> 0.99%, respectively). These five oils are not biodegraded so the<br />
principal control on their API gravities or total sulfur contents is the type of kerogen in their<br />
source rocks. Their thermal histories are a secondary control of the final gravities <strong>and</strong> sulfur<br />
contents.<br />
Post-accumulation factors such as biodegradation can alter the oils to give somewhat lower API<br />
gravities <strong>and</strong> slightly higher sulfur contents by removing the n–paraffin hydrocarbons <strong>and</strong> low<br />
molecular weight components. Once again, the type of kerogen in the oils' respective source<br />
rocks is the principal causal factor in the resultant oils' API gravity <strong>and</strong> sulfur content, but<br />
biodegradation is a secondary factor determining the final bulk oil properties.<br />
These phenomena cause partition in six families of oils.<br />
REFERENCES<br />
PRIFTI I. <strong>and</strong> MUSKA K. 1999. Identification of oil accumulations in Miocene deposits by<br />
geochemical parameters. In: 19th <strong>International</strong> Meeting on Organic Geochemistry,Istanbul<br />
/ Turkey , September 1999.<br />
VELAJ T <strong>and</strong> PRIFTI I. 1996. On hydrocarbon potential in Albania. In: 2nd <strong>International</strong><br />
Symposium on the Petroleum Geology <strong>and</strong> Hydrocarbon Potential of the Black Sea Area.<br />
Sile Istanbul,Turkey, September 1996.<br />
PRIFTI I. <strong>and</strong> MUSKA K. 2003. Classification of Albanian oils. In: Scientific meeting<br />
“Albanian geology in time”, (From Franc Nopça ). Tirane, November 2003.<br />
143
144
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
MINERALOGICAL <strong>and</strong> PETROLOGICAL CHARACTERISTICS of SHALLOW MARINE<br />
FORMATION in BRARI SECTION, ALBANIA<br />
Ana QORRI*<br />
(Poster)<br />
*Polytechnic University of Tirana, Faculty of Geology <strong>and</strong> Mining, Department of Earth Sciences.<br />
anaqorri@gmail.com<br />
Brari is located in Tirana Depression, which is situated in the north-eastern side of Periadriatic<br />
Depression. The Brari section belongs to inner-outer <strong>and</strong> outer neritic zones. Marine sediments of<br />
Brari section consist of basal s<strong>and</strong>y conglomerate beds with concretions, yellowish calcareous<br />
s<strong>and</strong>stones, cross bedded conglomerates <strong>and</strong> very thin layers of silty mudstones, parallel bed<br />
gravelites, massive fossiliferous s<strong>and</strong>stones with bivalves. Upward the section continues with<br />
Lithothamnium limestones. terrigenous succession <strong>and</strong> again Lithothamnium limestones. XRD <strong>and</strong><br />
SEM analyses indicate that quartz, calcite, dolomite, mica, feldspars minerals are dominant in this<br />
study area. Those are extremely weathered. The presence of chlorite, smectite was carried out by<br />
the XRD analyses, after several treatments of the samples.<br />
Keywords: Brari section, XRD (X-Ray Diffractometry), SEM-EDS (Scanning Electron<br />
Microcopy- Energy Dispersive Spectroscopy), Clay minerals.<br />
1- INTRODUCTION <strong>and</strong> OBJECTIVES.<br />
Brari is located in the south-eastern part of<br />
Tirana Depression. Brari section was<br />
measured <strong>and</strong> sampled in 1999, during a field<br />
trip, by the members of a project ( Meço,<br />
145<br />
Durmishi, Gjani, Kleinholter). Aquitanian,<br />
Langhian, Serravallian, Tortonian successions<br />
are determined into this section (Fig.1). The<br />
Serravallian- Tortonian deposits show marine<br />
conditions.
The primary purpose of this study is to<br />
determine the textural <strong>and</strong> mineralogical<br />
characteristics of this Neogene unit in respect<br />
to their genetic relationship. The second is to<br />
determine the principal minerals in the study<br />
area. The third <strong>and</strong> the most important is to<br />
identify the clay minerals, <strong>and</strong> to give a full<br />
description of them. Realizing all of this<br />
objectives, can give to us a useful <strong>and</strong> an<br />
exact information of the forming history of<br />
the sediments this area.<br />
2- METHODS of STUDY.<br />
Fig.1 Geological Map of Tirana Depression (According to the Geological<br />
Map of Albania. 1:200 000).<br />
In this study 11 clay samples were collected<br />
from the bottom to the top of the section. The<br />
mineralogical characteristics of the samples<br />
were determined through several techniques,<br />
including XRD <strong>and</strong> SEM-EDS methods. For<br />
petrographic studies <strong>and</strong> electron microscopy<br />
9 normal thin sections were prepared from the<br />
most characteristic samples. The mineralogical<br />
composition of the samples was<br />
examined using X-Ray Diffraction under<br />
CoK� radiation, with a step scanning 3 to<br />
60º2� in steps of 0.01º2� with a counting time<br />
of 1.00 s per step. First X-ray Diffraction<br />
Analyses were done from the samples in natural<br />
conditions <strong>and</strong> after this were selected the 2 most<br />
representative samples. The analyses aimed at<br />
documenting the gross mineralogy, <strong>and</strong> specially<br />
clay mineralogy of Brari Section. A clay fraction<br />
(< 2 µm) was separated out from the samples by<br />
disaggregating with different acids according to<br />
Jackson Method <strong>and</strong> dispersing the sample in<br />
distilled water <strong>and</strong> immediately washed by<br />
centrifugation. The fraction of < 2 µm was<br />
isolated by centrifugation <strong>and</strong> suspension were<br />
dried on glass slides. The clay samples in oriented<br />
mounts were run under three separate conditions:<br />
1) air dry state.<br />
2) after heating to 550º C for 2 hours <strong>and</strong><br />
3) after ethylene glycol treatment<br />
3- RESULTS <strong>and</strong> DISCUSSION. X-ray diffraction<br />
146<br />
Brari<br />
The digital data were interpreted using X-Pert<br />
Highscore Plus software, which comprises a<br />
search-match routine based on a Powder<br />
Diffraction File.
Minerals identification by XRD indicated that<br />
the main minerals are quartz, feldspar, mica<br />
chlorite, smectite (after the treatment of the<br />
samples) <strong>and</strong> a small quantity of serpentine.<br />
However, minor amount of feldspar is still<br />
SEM-EDS<br />
present in many of the samples (Fig.2), <strong>and</strong><br />
trace amounts of calcite <strong>and</strong> dolomite are also<br />
present in many samples(before the treatment<br />
of the samples with the acids).<br />
As a confirmation of XRD analyses even<br />
under SEM the minerals identified in thin<br />
sections are: quartz, as the main constituent,<br />
dolomite in form of cement, feldspar<br />
weathered into clay minerals (chlorite),<br />
Fig.2 XRD pattern of sample Alb_34 B/22/1 from the study area.<br />
Fig.3 Several minerals identified at thin section no.<br />
Alb_66_01. Q- Quartz; M-Muscovite; Fsp-Feldspars;<br />
Do-Dolomite; I-Ilmenite; R-Rutile; Zr-Zircon<br />
147<br />
biotite elongated like flakes, white dots of<br />
pyrite, muscovite is also present (Fig.4), in its<br />
composition has a considerable quantity of<br />
Mg <strong>and</strong> Ca, because of dolomite cement. To<br />
notice is the presence of many minerals which<br />
are accessory minerals in igneous rocks, like<br />
ilmenite, monazite, zircon (Fig.3) etc.<br />
Conclusion<br />
Fig.4 EDS spectrum for muscovite.
Non Clay Minerals present in Brari section<br />
are:<br />
Quartz: Quartz forms one of the most<br />
abundant minerals in most of the samples.<br />
Quartz is identified by its distinctive<br />
reflections at 4.26 Å <strong>and</strong> 3.35 Å. The 3.35 Å<br />
peak of quartz was more intense than the<br />
other peaks. There was a coinciding in some<br />
samples, with a strong reflection of illite at<br />
3.33 Å which makes this 3.35 Å peak difficult<br />
to use, due to as quartz is abundance.<br />
Feldspar: Feldspar is the next important nonclay<br />
mineral present in most of the samples<br />
but in minor amount. It is identified by<br />
distinct reflection in the spacing range of 3.8<br />
Å to 3.2 Å<br />
Calcite: Calcite is identified by only a weak<br />
reflection at 3.01 Å showing its presence in<br />
trace amounts.<br />
Dolomite: Dolomite is identified by only a<br />
weak reflection at 2.8 Å, indicating a trace<br />
amount of the mineral.<br />
Muscovite: Muscovite is identified by not<br />
such a strong reflection at 10.1 Å, indicating<br />
his presence in our samples.<br />
Clay Minerals present in Brari section are:<br />
Chlorite: Chlorite is represented by its basal<br />
reflections at 14.25 Å, 7 Å, 4.7 Å <strong>and</strong> 3.5 Å<br />
respectively. The basal reflection at 14.25 Å<br />
could not be used directly for the<br />
identification of chlorite because of an<br />
interfluence with an Illite-Smectite mixed<br />
layer, <strong>and</strong> 7.14 Å also could not be used for<br />
chlorite identification because of the<br />
interference <strong>and</strong> coincidence of kaolinite<br />
reflections.<br />
Smectite: Smectite was identified using XRD<br />
technique. The petrographic <strong>and</strong> mineralogycal<br />
studies indicate that smectite is the earliest<br />
mineral to form due to the transformation<br />
reactions.<br />
148<br />
ACKNOLEDGEMENTS<br />
The author is grateful to Prof.C.Durmishi for<br />
creating the possibility to take this samples in<br />
Pol<strong>and</strong>. Many thanks are due to Prof. Eleni<br />
Gjani <strong>and</strong> to the professors of the Faculty of<br />
Earth Sciences, Sosnowiec, Pol<strong>and</strong>, for their<br />
help with the SEM <strong>and</strong> XRD analysis.<br />
BIBLOGRAPHY<br />
E.Gjani, S.Meco, F.Strauch (2003) -Litho-<br />
Biostratigraphic data on the Tirana<br />
Depression(Albania) <strong>and</strong> their correlation<br />
with the Periadriatic Depression. pp.723-736.<br />
E.Neczko (1965), - Clay Minerals, pp.329-<br />
354.<br />
W. S. Mackenzie, C. H. Donaldson, C.<br />
Guilford – Atlas of Igneous Rocks <strong>and</strong> Their<br />
Textures (1982)<br />
W. S. Mackenzie, Adams, C. Guilford– Atlas<br />
of Sedimentary Rocks Under the Microscope<br />
(1981)<br />
W. S. Mackenzie, C. Guilford– Atlas of Rock-<br />
Forming minerals in this section (1978)<br />
K. Ibrahim - Mineralogy <strong>and</strong> chemistry of<br />
natrolite from Jordan (2003) 39, 47–55.
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
<strong>ACTIVE</strong> BASINS <strong>and</strong> NEOTECTONICS: MORPHOTECTONICS of the LAKE<br />
OHRID BASIN (FYROM <strong>and</strong> ALBANIA)<br />
Klaus REICHERTER 1 , Katja LINDHORST 2 , Nadine HOFFMANN 1 , Sebastian<br />
KRASTEL-GUDEGAST 2 , Ariane LIERMANN 1,3 <strong>and</strong> Ulrich A. GLASMACHER 3<br />
1<br />
Institute of Neotectonics <strong>and</strong> Natural Hazards, RWTH Aachen University, Lochnerstr. 4-20,<br />
52056 Aachen, Germany<br />
2<br />
IFM-Geomar, Kiel, Germany<br />
3<br />
Institute of Earth Sciences, Research Group: Thermochronology <strong>and</strong> Archaeometry,<br />
University Heidelberg, Im Neuenheimer Feld 234 69120 Heidelberg, Germany<br />
Corresponding author: K. Reicherter, mail: k.reicherter@nug.rwth-aachen.de<br />
The Lake Ohrid Basin in the extensional part of FYROM (Former Yugoslav Republic of<br />
Macedonia) <strong>and</strong> Albania meets all criteria of an active, seismogenic l<strong>and</strong>scape: linear steplike<br />
fault scarps in the l<strong>and</strong>scape <strong>and</strong> under water within the lake. The neotectonic <strong>and</strong><br />
l<strong>and</strong>scape evolution of the southern Albanian fold-<strong>and</strong>-thrust belt <strong>and</strong> the Albanian-FYROM<br />
extensional back-arc area (basin <strong>and</strong> range type) are directly linked to subduction <strong>and</strong><br />
subduction roll-back within the Hellenic trench system (Fig. 1). The initiation of the Ohrid<br />
Basin is estimated between 2 <strong>and</strong> 8 million years.<br />
Figure 1: Structural cross section from the Adrian coast to the Neogene basins in the<br />
Balkanides. Within the extensional domain basins form, whereas the frontal part is<br />
characterised by thrusts.<br />
149
The deformation can be divided in three major deformation phases (1) NW-SE shortening<br />
from Late Cretaceous to Miocene with compression, thrusting <strong>and</strong> uplift; (2) uplift <strong>and</strong><br />
diminishing compression during Messinian - Pliocene; (3) vertical uplift <strong>and</strong> (N)E-(S)W<br />
extension from Pliocene to recent associated with (half-) graben formation. This latter phase<br />
of an orogenic collapse is related with a seismogenic l<strong>and</strong>scape with linear step-like fault<br />
scarps on l<strong>and</strong> <strong>and</strong> offshore.<br />
Figure 2: Morphotectonic features of the Lake Ohrid Basin from SW. O = Mirdita ophiolites<br />
(Jurassic-Cretaceous), C = Carbonates (Triassic), M = Molasse (Tertiary), p = polje.<br />
A tectonic multi-proxy approach (palaeostress analysis, geophysical <strong>and</strong> remote sensing<br />
methods) has been made to reveal the stress history, the neotectonic history <strong>and</strong> tectonic<br />
geomorphology of the Lake Ohrid region. Post-glacial (or Late Pleistocene) bedrock fault<br />
scarps at Lake Ohrid are long-lived expressions of repeated surface faulting in tectonically<br />
active regions, where erosion cannot outpace the fault slip. Other morphotectonic features are<br />
wind gaps, wineglass-shaped valleys <strong>and</strong> triangular facets, which are well preserved.<br />
Generally, the faults <strong>and</strong> fault scarps are getting progressively younger towards the basin<br />
center, as depicted on seismic <strong>and</strong> hydroacoustic profiles. The geomorphology also points to<br />
rotated <strong>and</strong> tilted blocks. Additionally, mass movement bodies within the lake <strong>and</strong> also<br />
onshore (rockfalls, l<strong>and</strong>slides, sub-aquatic slides, homogenites, turbidites) are likely to have<br />
been seismically triggered. These morphotectonic observations are in line with focal<br />
mechanisms of earthquakes in the greater Lake Ohrid area.<br />
Furthermore, apatite fission-track (A-FT) analysis <strong>and</strong> t-T-paths modelling was performed to<br />
constrain the thermal history, <strong>and</strong> the exhumation rates. For fission-track analysis apatites<br />
were separated from a suite of granitoid rocks from basement units <strong>and</strong> from flysch- <strong>and</strong><br />
molasse-type deposits of Paleogene to Neogene age. Apatites show a range of the apparent<br />
ages from 56.5±3.1 to 10.5±0.9 Ma. The spatial distribution of ages suggests different blocks<br />
with a variable exhumation <strong>and</strong> rock uplift history. Fission-track ages from molasse <strong>and</strong><br />
flysch sediments of the basin fillings show distinctly younger ages. Generally, the Prespa<br />
Basin reveals A-FT-ages around 10 Ma close to normal faults, whereas modelling results of<br />
the Ohrid Basin suggest a rapid uplift initiated around 1.4 Ma associated with uplift rates (?<br />
rock uplift rates or surface uplift rates?) on the order of 1 mm/a. As a conclusion we observe a<br />
150
westward migration of the extensional basin formation, i.e. the initiation of the Prespa Basin<br />
occurred well before the formation of the Ohrid Basin.<br />
Figure 3: Sketch of the major neotectonic features at Lake Ohrid resembling a “seismogenic”<br />
or “paleoseismic” l<strong>and</strong>scape. Note the Kosel hydrothermal field along a major fault in<br />
the north. The earthquake zone brackets the focal depth of instrumentally recorded<br />
earthquakes in the area, which is between 12 <strong>and</strong> 25 km depth.<br />
References<br />
Hoffmann, N., Reicherter, K., Fernández-Steeger, T. <strong>and</strong> Grützner, C. (2010, accepted):<br />
Evolution of ancient Lake Ohrid. A tectonic perspective. Biogeosciences, Special Issue:<br />
Evolutionary <strong>and</strong> geological history of Balkan lakes Ohrid <strong>and</strong> Prespa.<br />
Wagner B., Reicherter, B., Daut, G., Wessels, M., Matzinger, A., Schwalb, A., Spirkovski, Z.<br />
<strong>and</strong> Sanxhaku, M. (2008): The potential of Lake Ohrid for long-term<br />
palaeoenvironmental reconstructions. Palaeogeography, Palaeocology,<br />
Palaeoclimatology, 259, 241-356.<br />
151
152
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
KINEMATIC <strong>and</strong> PETROLEUM MODELLING in the ALBANIDES<br />
François ROURE* , **, Laurie BARRIER* , ***, Jean-Paul CALLOT*, Kristaq<br />
MUSKA**** <strong>and</strong> Nadège VILASI* , *****<br />
*IFP Energies Nouvelles, 1-4 Avenue de Bois Préau, 92852 Rueil-Malmaison Cedex, France<br />
**VU-Amsterdam, de Boelelaan 1085, 1081HV Amsterdam, the Netherl<strong>and</strong>s<br />
***current position, IPG-Paris<br />
****Polytechnic University, Tirana<br />
*****current position, Statoil<br />
corresponding author: Francois.ROURE@ifpenergiesnouvelles.fr<br />
Basin modelling tools are now more efficient to reconstruct palinspastic structural cross<br />
sections <strong>and</strong> compute the history of temperature, pore fluid pressure <strong>and</strong> fluid flow<br />
circulations in complex structural settings.<br />
For instance, IFP Energies Nouvelles has developed since a couple of years numerical tools<br />
such as Thrustpack, Dionisos <strong>and</strong> Ceres, aiming at forward kinematic modelling, stratigraphic<br />
modelling, as well as fluid flow, pore fluid pressure <strong>and</strong> HC generation <strong>and</strong> migration<br />
modelling. These tolls have been integrated here in a specific workflow dedicated to a better<br />
assessment of the petroleum systems in the tectonically complex Albanides thrust belt.<br />
Regional seismic profiles have been first interpreted <strong>and</strong> calibrated against exploration wells.<br />
Resulting interpretations have been depth converted. Three parallel structural sections have<br />
been then balanced <strong>and</strong> unfolded, the resulting initial geometries being used as an input data<br />
to initiate the forward Thrustpack modelling. For each incremental stage of the deformation,<br />
Dionisos was used to simulate the deposition pattern of the synorogenic sediments, starting<br />
from the Oligocene flexural flysch sequence until the last Plio-Quaternary stages of<br />
deformation, including numerous incremental Miocene thrust episodes.<br />
Ultimately, Ceres modelling was also applied to one of these Albanian sections, using the<br />
result intermediate geometries obtained during the Thrustpack modelling as geometric targets<br />
to calibrate intermediate stages in Ceres.<br />
The results of this fluid flow <strong>and</strong> petroleum modelling are finally discussed with respect to the<br />
known petroleum occurrences in the Albanides <strong>and</strong> the adjacent Adriatic forel<strong>and</strong>.<br />
More details on the coupling between Thrustpack <strong>and</strong> Dionisos softwares <strong>and</strong> on the Ceres<br />
modelling will be presented in two companion posters, i.e. Barrier et al. <strong>and</strong> Vilasi et al.<br />
153
154
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
ALPINE INVERSION of the NORTH AFRICAN MARGIN <strong>and</strong> DELAMINATION of<br />
its CONTINENTAL LITHOSPHERE<br />
François ROURE* , **, Piero CASERO***, <strong>and</strong> Belkacem ADDOUM****<br />
*IFP Energies Nouvelles, 1-4 Avenue de Bois Préau, 92852 Rueil-Malmaison Cedex, France<br />
**VU-Amsterdam, de Boelelaan 1085, 1081HV Amsterdam, the Netherl<strong>and</strong>s<br />
***Roma, Italy<br />
****Sonatrach, Division Exploration, Avenue du 1° Novembre, BP68M, Boumerdes 35000,<br />
Algeria<br />
corresponding author: Francois.ROURE@ifpenergiesnouvelles.fr<br />
The former Mesozoic passive margin of North Africa has been strongly influenced by the<br />
Cretaceous to Neogene Alpine deformations, making difficult to trace its initial contours<br />
between the Saharan Atlas <strong>and</strong> Apulia in the west, <strong>and</strong> its current extent <strong>and</strong> architecture<br />
beneath the allochthon of the Ionian-Calabrian arc <strong>and</strong> adjacent Mediterranean Ridge in the<br />
east.<br />
A rim of Tethyan ophiolitic sutures can be traced more or less continuously from Turkey <strong>and</strong><br />
Cyprus in the east, in onshore Crete, in the Pindos in Greece <strong>and</strong> Mirdita in Albania, as well<br />
as in the Western Alps, Corsica <strong>and</strong> the Southern Apennines in the west, implying that both<br />
the Apulia/Adriatic domain <strong>and</strong> the Eastern Mediterranean Basin belong to the southern<br />
margin of the Tethys. Because there is no evidence of vertical offset of the Moho beneath the<br />
Mediterranean arcs, we propose to apply a new model of delamination of the continental<br />
lithosphere, recently documented in the southeastern Carpathians, to the Apennines <strong>and</strong> the<br />
Aegean, where the paleo-oceanic suture is indeed exposed in the hinterl<strong>and</strong>. According to this<br />
model, only the mantle lithosphere of Apulia <strong>and</strong> the Eastern Mediterranean has been <strong>and</strong> is<br />
still locally subducted <strong>and</strong> recycled in the asthenosphere, the northern portion of the African<br />
crust <strong>and</strong> coeval Moho being currently decoupled from its former, currently delaminated <strong>and</strong><br />
subducted mantle lithosphere.<br />
Although the Kabylides <strong>and</strong> Peloritan units have been for a long time assumed to be of<br />
European affinities, there is no evidence of any ophiolitic suture in Algeria, Tunisia nor Sicily<br />
between the stable African forel<strong>and</strong> <strong>and</strong> these far-travelled accreted terranes. Therefore, the<br />
former substratum of the Tellian units still remains conjectural, this intervening domain being<br />
either related to a truly oceanic or instead to a formerly thinned but still continental<br />
lithosphere.<br />
Accurate dating of the synflexural <strong>and</strong> synkinematic series helps to trace the spatial <strong>and</strong><br />
temporal evolution of the regional forel<strong>and</strong> flexure developing in front of advancing nappes,<br />
<strong>and</strong> which indeed records the effects of thrust loading <strong>and</strong> slab pull. Synorogenic sediments<br />
help also to precise the timing of thin-skinned deformation, which occurred mainly prior to<br />
the Upper Miocene in Algeria, but was still active during the Pliocene <strong>and</strong> even the<br />
Quaternary in the Southern Apennines <strong>and</strong> along the eastern margins of the Ionian abyssal<br />
plain.<br />
Despite non-cylindricity <strong>and</strong> time discrepancies in the tectonic/geodynamic agenda, regional<br />
cross-sections presented here show also many similarities in the deformation of the lower<br />
plate between the Tellian edifice in Algeria in the west, the Sicilian Channel between Tunisia<br />
155
<strong>and</strong> Italy in the centre, <strong>and</strong> the Ionian abyssal plain <strong>and</strong> Eastern Mediterranean Ridge in the<br />
east. For instance, Late Cretaceous to Paleogene pre-collisional inversions are well<br />
documented in the autochthonous forel<strong>and</strong> in the Saharan Atlas, in the Sicilian Channel <strong>and</strong><br />
the Ragusa Plateau, where they predate the development of the overlying Miocene flexural<br />
basin. Intra-Tortonian inversions are also documented from Sfax in Tunisia to the Sicani<br />
Mountains in Sicily, as well as in the deep offshore Ionian Basin. Post-suture transpression<br />
accounts also for late inversions of the underthrust forel<strong>and</strong> in the Southern Apennines<br />
(Tempa Rossa <strong>and</strong> Monte Alpi subthrust prospects), northern Sicily (Panormide-Imerese<br />
nappes anticline), as well as beneath the Tellian allochthon in Algeria (Bibans <strong>and</strong><br />
Constantinois tectonic windows), whereas transtension <strong>and</strong> strain-partitioning near the backstop<br />
have locally led to the development of thrust-top pull-apart basins in the Chelif area<br />
(Algerian Tell), San'Archangelo Basin (Southern Apennines), as well as on top of the<br />
Mediterranean Ridge off the western coast of Peloponnesus.<br />
Whereas slab pull or slab retreat are known to account for forel<strong>and</strong> flexure <strong>and</strong> subsidence,<br />
with deposition <strong>and</strong> preservation of deep water series in Neogene foredeeps of the<br />
Maghrebides, Sicily <strong>and</strong> Apennines, as well as for the present deep water environment of the<br />
Eastern Mediterranean, slab detachment <strong>and</strong> further dynamic topography linked to<br />
asthenospheric rise beneath the Algerian <strong>and</strong> Tyrrhenian basins have already led to rapid<br />
uplift <strong>and</strong> exhumation of the former Tellian, Sicilian <strong>and</strong> Apenninic foredeeps.<br />
Ultimately, recent seismic imagery <strong>and</strong> focal mechanisms help also to document the recent<br />
development of north-verging thrust faults at the toe of the continental slope from North<br />
Algerian to North Sicilian margins, thus accounting for a double verging orogen, both the<br />
Algerian Basin <strong>and</strong> Tyrrhenian Sea now behaving as retro-arc forel<strong>and</strong> basins with respect to<br />
currently active African margin.<br />
Because recent oil <strong>and</strong> gas discoveries have been made in the Southern Apennines <strong>and</strong> Sicily,<br />
the knowledge of these various structural styles, source rock distribution <strong>and</strong> timing of their<br />
maturation should be used as useful analogues when ranking the petroleum potential of early<br />
forel<strong>and</strong> closures versus late subthrust prospects in the yet under-explored areas of the<br />
Algerian foothills (Tell) in the west, <strong>and</strong> to limit also the exploration risk in the deep Ionian<br />
offshore <strong>and</strong> Eastern Mediterranean Basin in the east.<br />
156
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
Sedimentology of resedimented carbonates: facies <strong>and</strong> geometrical characterisation of<br />
Upper Cretaceous calciturbidite system in Albania<br />
Rubert Yolaine 1, Jati Mohamed 1, Loisy Corinne 1, Cerepi Adrian 1, Foto Gjergji 2,<br />
Mushka Kristaq 2<br />
1, EGID-Bordeaux 3 Institute, 1 allée F. Daguin, 33607 PESSAC Cedex, France<br />
rubertyolaine@yahoo.fr<br />
2, Faculty of geology <strong>and</strong> mining, Tirana Polytechnic University, Albania<br />
Introduction-Geological setting<br />
The siliciclastic turbiditic systems have been largely studied motivated by their reservoir<br />
rock potentials. On the contrary, resedimented carbonates did not benefited of such attention<br />
but several key studies of resedimented carbonates have permit to precise the facies, the<br />
depositional models, or the controlling factors (Mullins <strong>and</strong> Cooks 1986; Einsele et al., 1991;<br />
Payros <strong>and</strong> Pujalte, 2008). Nevertheless there are few examples of gravitary limestone works<br />
notably concerning the geometry due to the lack of continuous outcrops. However<br />
resedimented carbonates are potential reservoir rocks especially in coarse levels (Mullins &<br />
Cook 1986; Casabianca et al. 2002). In the south of Albania, Upper Cretaceous limestones<br />
outcrop <strong>and</strong> were described as breccia (Llahana Th.; Gucaj A.). The outcropping conditions of<br />
Piluri, Muzina <strong>and</strong> Vanister sections studied here, favour a detailed sedimentary study of this<br />
formation with the facies determination <strong>and</strong> the geometry description.<br />
In the SW part of Albania, the Krasta, the Kruja <strong>and</strong> the Ionian tectonic nappes were<br />
stacked by a westward NW-SE trending thrusts during the tertiary Alpine orogen (figure 1).<br />
The western autochtonous Sazani zone corresponds to the pre-apulian platform. Northward<br />
the tectonic nappes are buried under the post-eocene sediments of the peri-Adriatic depression<br />
<strong>and</strong> some formations constitute reservoir rocks for current oil exploitation (Xhavo 2002).<br />
Piluri, Muzina <strong>and</strong> Vanister sections are Upper Cretaceous in age <strong>and</strong> are located in different<br />
tectonic units (Moisiu & Gurabardhi 2004). Paleogeographically they correspond to slope <strong>and</strong><br />
basin deposits belonging to the Ionian Basin. This basin is bordered in the west part by the<br />
Apulian platform, <strong>and</strong> in the east part by the Kruja platform <strong>and</strong> the transition with basinal<br />
limestones is faulted (Zappatera 1994).<br />
Methodology<br />
In Piluri outcrop, two sections were logged with around 350 m distances (Piluri WSW <strong>and</strong><br />
Piluri ENE) <strong>and</strong> total thickness reaching 227 m (figure 1). At Muzina two sections were<br />
logged with 1 km of distance (Muzina-W <strong>and</strong> Muzina E), the total thickness being about 260<br />
m. At Vanister around 150 m thick was logged in the upper part of the succession situated at 8<br />
km NW of Muzina into the same Mali i Gjere massif. For biostratigraphy limit between<br />
Upper Cretaceous <strong>and</strong> Paleocene we used the fauna determination of Brahimi et al. (1987)<br />
<strong>and</strong> Brahimi et al. (1992). We also use planktonic foraminifera assuming they correspond to<br />
lesser reworked constituents.<br />
Results<br />
Excepted in Piluri-ENE section the four others display three thick levels more or less<br />
slumped intercalated with decimetric to plurimetric bedded units. These stratified units are t1<br />
to t4 for the topmost <strong>and</strong> deformed levels are noted S1 to S3 at the top. For Piluri-ENE section<br />
a fourth deformed level was identified in the t1 unit (figure 1 & 2). The field sedimentary<br />
study has allowed to define six facies.<br />
157
Figure 1 - Geological context (from Moisiu & Gurabardhi, 2004) <strong>and</strong> panoramas of Upper<br />
Cretaceous outcrops of Muzina, Vanister <strong>and</strong> Piluri.<br />
The Background sedimentation can be described as a clay mudstone with or whithout<br />
bioturbation but it is difficult to distinguish it from resedimented calcilutite (Einsele et al.,<br />
1991) <strong>and</strong> we have considered the beginning of bioturbation as the transition between<br />
resedimented calcilutite <strong>and</strong> the background sedimentation.<br />
Fine-, medium- <strong>and</strong> coarse-grained sequences with thicknesses from 20 to 240 cm were<br />
observed with a predominant non-erosive base. The fine-grained resedimented carbonates<br />
include only calcilutitic strata with 20 to 150 centimeter thicknesses, displaying succession of<br />
undulated lamination <strong>and</strong>/or planar lamination overlain by a topmost uniform mudstone with<br />
bioturbations <strong>and</strong> cherts. The Medium-grained resedimented facies are between 30-200 cmthick<br />
with normal grading (calcarenite to calcilutite). The sedimentary structures are mainly<br />
planar <strong>and</strong> undulated lamination, followed by current ripples. The topmost calcilutitic level<br />
can show bioturbations <strong>and</strong> cherts. Coarse-grained sequences are 120 to 240 cm-thick with<br />
calcirudite to calcilutite granulometry. The base is calciruditic, with mm to cm-scale<br />
polygenic grains within a calcarenitic matrix, <strong>and</strong> with normal grading <strong>and</strong> rarely inverse.<br />
Topmost intervals are calcarenite to calcilutite with undulated planar <strong>and</strong> oblique bedding.<br />
Few cherts are present at the top.<br />
Cobbly calcirudites without sedimentary structure <strong>and</strong> internal stratification were observed<br />
with thicknesses higher than 3 m. The texture appears mud-supported with pluri-millimetric to<br />
pluri-centimetric polygenic grains included in a calciruditic matrix. Topmost intervals are<br />
calcarenitic <strong>and</strong> display sedimentary structures (planar oblique <strong>and</strong> undulated lamination).<br />
Through the sections they correspond to the S2 level in Muzina-E section with an erosive base<br />
displaying slide plane or to the top of deformed levels (above S1 <strong>and</strong> S3 units) displaying an<br />
irregular base <strong>and</strong> a flat top (figure 2).<br />
Deformed levels were observed in Muzina <strong>and</strong> Vanister outcrops, with slumped strata<br />
where sedimentary structures were detected with more or less complete succession as<br />
described above in stratified beds. In Muzina <strong>and</strong> Vanister sections, these levels appear<br />
clearly deformed with folds <strong>and</strong> slide planes. In Piluri section the outcrop conditions prevent a<br />
clear distinction of the deformed levels <strong>and</strong> the deformation is weaker giving an undulated<br />
aspect <strong>and</strong> gently folded beds (figure 2).<br />
158
Figure 2 - Detailed localisation <strong>and</strong> lithologic sections of Piluri, Muzina <strong>and</strong> Vanister<br />
The vertical evolution of sediments in Muzina <strong>and</strong> Piluri begin with fine-grained beds at<br />
the base of the unit t1 (figure 2). Then the sediments of the unit 1 become coarser until the<br />
first slumped level S1. In Piluri-ENE a locally deformed level was detected in unit t1. Above,<br />
the stratified t2, t3 <strong>and</strong> t4 units are composed by beds with similar facies than at the top of the<br />
unit t1.<br />
Discussion-Conclusion<br />
The fine- to coarse-grained sequences described above display characteristics relative to<br />
turbiditic sequences: 1) moderate bioturbation localised in thinner intervals contrary to<br />
complete bioturbation in contourites (Stow et al. 1998); 2) the scarcity of bottom marks<br />
typical to calciturbidites; 3) the presence of metric levels of rudites, inverse grading which<br />
exclude storm deposits; 4) the presence of cherts as nodule or continuous beds (Einsele et al.,<br />
1991); 5) the sedimentary structures succession as in Bouma’s intervals (1962) resulting of a<br />
decelarating currents. The cobbly levels above S1 <strong>and</strong> S3 levels seem to show the progressive<br />
transformation of the mass slide into mass flow. Comparing the three outcrops, lateral<br />
variations appear implying a proximal character for Piluri: i) the turbidites are thicker <strong>and</strong><br />
159
display rapid lateral variations in thickness <strong>and</strong> granulometry ii) the average grain size is<br />
higher; iii) the deformed levels in Piluri are represented by tiled <strong>and</strong> weaker folded strata.<br />
The main factors triggering gravitary calcareous systems are tectonism, eustatism or<br />
sediment supply (Einsele et al., 1991). Regional studies have displayed an important phase of<br />
instability <strong>and</strong> resedimentation during the late Cretaceous <strong>and</strong> later, both in the Ionian Basin<br />
(Bosellini et al. 1993; Bice et al., 2007) <strong>and</strong> in the surrounding platforms (Spalluto et al.,<br />
2007; Heba & Prichonnet 2009). The tectonism is evoked as a triggering factor combined<br />
with a seal-level fall. These instability features can be related to the first movements of the<br />
compression between African <strong>and</strong> Eurasian plates beginning in Late Cretaceous (Dercourt,<br />
1986).<br />
The comparison of resedimented carbonate in Muzina <strong>and</strong> Vanister, 8 km apart shows<br />
relatively few lateral variations in global thicknesses <strong>and</strong> at the outcrop scale any erosive<br />
surface marking channel occurrence was observed. Between Piluri <strong>and</strong> Vanister-Muzina one<br />
could correlate the third deformed levels (figure 2) but any data allow us to confirm their<br />
continuity, all the more so in Piluri-ENE a fourth slumped level was observed. Besides the<br />
total wide of the Ionian basin is around 50 km in the zone (Zappatera, 1994), involving that<br />
Vanister-Muzina sections could have been fed by the western Sazani <strong>and</strong>/or the eastern Kruja<br />
platform. In every instance the quasi-absence of erosive or chanellised features in<br />
calciturbidites whatsoever their granulometry, contrasts with previous studies about ancient<br />
submarine fans (Payros <strong>and</strong> Pujalte, 2008). Besides, lateral variations of facies are weak even<br />
in Piluri proximal section. Outcrop observations <strong>and</strong> lateral expansion of the brecciated levels<br />
detected until the northern part of Mali I Gjere massif (Llahana Th.) might be coherent with a<br />
spread line-sourced gravitary system (Mullins & Cooks, 1986).<br />
References<br />
Bice D.M. et al., 2007, Terra Nova, 19, p. 387-392.<br />
Bosellini A. et al., 1993, Terra Nova, 5, p.282-297.<br />
Bouma A.H., 1962. Elsevier, Amsterdam, 168 p.<br />
Brahimi Q. et al., 1987, Gas <strong>and</strong> petroleum geological institute of Fier.<br />
Brahimi Q. et al., 1992, Gas <strong>and</strong> petroleum geological institute of Fier.<br />
Casabianca D. et al., 2002, Journal of Petroleum Geology, 25(2), p. 179-202.<br />
Gucaj A., , Ministry of Mineral ressources <strong>and</strong> energetics, Institute of Geological<br />
Research, Gas <strong>and</strong> Petroleum institute of Fier, Faculty of geology <strong>and</strong> mining-Polytechnic<br />
Univeristy of Tirana<br />
Dercourt J. et al., 1986, Tectonophysics, 123, 1-4, p. 241-315.<br />
Einsele G. et al., 1991, Springer-Verlag Berlin Heidelberg, New York, 955p.<br />
Heba G., Prichonnet G., 2009, Bulletin de la Société Géologique de France, 180, n°5, p.<br />
431-448<br />
Llahana Th., , Ministry of Mineral ressources <strong>and</strong> energetics, Institute of Geological<br />
Research, Gas <strong>and</strong> Petroleum institute of Fier, Faculty of geology <strong>and</strong> mining-Polytechnic<br />
Univeristy of Tirana.<br />
Moisiu L., Gurabardhi L., 2004, Gas <strong>and</strong> petroleum geological institute of Fier.<br />
Mullins H.T. & Cook H.E., 1986, Sedimentary Geology 48 : 37-39.<br />
Payros A., Pujalte V., 2008, Earth-Science Reviews, 86, p.203-246.<br />
Spalluto L. et. al., 2007, Sedimentary Geology 196, p.81-98.<br />
Stow D.A.V. et al., 1998, Sedimentary Geology, 115, p.3-31.<br />
Xhavo A., 2002, National Petroleum Agency, Tirana, 24p.<br />
Zappaterra E., 1994, AAPG Bulletin, 78, n°3, p. 333-354.<br />
160
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
Reservoir properties of resedimented carbonates of Upper Cretaceous turbiditic<br />
system in Albania<br />
Rubert Yolaine 1, Jati Mohamed 1, Loisy Corinne 1, Cerepi Adrian 1, Foto Gjergji 2,<br />
Mushka Kristaq 2<br />
1, EGID-Bordeaux 3 Institute, 1 allée F. Daguin, 33607 PESSAC Cedex, France<br />
rubertyolaine@yahoo.fr<br />
2, Faculty of geology <strong>and</strong> mining, Tirana Polytechnic University, Albania<br />
Introduction-Geological setting<br />
The siliciclastic turbiditic systems have been largely studied motivated by their reservoir<br />
rock potentials contrary to resedimented carbonates which did not benefit of such attention.<br />
But several key studies of modern <strong>and</strong> ancient resedimented carbonate systems have permit to<br />
precise the facies, the depositional models, or the controlling factors (Mullins <strong>and</strong> Cooks<br />
1986; Einsele G. et al., 1991; Payros <strong>and</strong> Pujalte, 2008). Studies about resedimented<br />
carbonates have allow to demonstrate their reservoir rock potential especially in coarse levels<br />
(Casabianca et al. 2002).<br />
The Northeastern part of Albania is an hydrocarbon bearing province with in particular<br />
Late Cretaceous limestones which host oil reservoirs under the Peri-adriatic depression<br />
(Xhavo, 2002). More in the south, this formation outcrops <strong>and</strong> is described as brecciated<br />
limestones. In the Kremenara anticline, this formation displays superficial oil seeps (Dewever<br />
et al. 2007) which allowed to describe the porosity <strong>and</strong> the factors controlling its formation.<br />
The outcrops of Piluri <strong>and</strong> Muzina, studied here are devoid of oil seep but outcropping<br />
conditions favour a combined sedimentary <strong>and</strong> petrographical-petrophysical study of the<br />
Upper Cretaceous brecciated carbonates. A preliminary sedimentological study of these<br />
brecciated limestones allowed to determine their gravitary origin. Paleogeographically they<br />
correspond to slope <strong>and</strong> basin deposits belonging to the Ionian Basin (Zappatera, 1994).<br />
Methodology<br />
In Piluri outcrop, two sections were logged with total thickness reaching 227 m. At Muzina<br />
two sections were logged, the total thickness being about 260 m. At Vanister around 150 m<br />
thick was logged in the upper part of the succession. Several facies were defined by<br />
sedimentological. study: fine-, medium- <strong>and</strong> coarse- calciturbidites, debris-flows, <strong>and</strong> slumps.<br />
Sampling was performed relatively to each field facies <strong>and</strong> uncovered, unpolished thin<br />
sections were made <strong>and</strong> observed with an optical microscope (Olympus BH-2). Petrophysical<br />
measurements were realised with an air permeameter IPF 49 apparatus <strong>and</strong> dried cores, <strong>and</strong><br />
with a mercury porosimeter Micromeritics III <strong>and</strong> dried rocks fragments.<br />
Results<br />
Petrography<br />
Thin section examination allowed to define seven microfacies, the various constituants <strong>and</strong><br />
to describe the diagenesis with additionaly field observations.<br />
161
Figure 1 – Geological context of the Upper Cretaceous calciturbidites (Moisiu &<br />
Gurabardhi, 2004)<br />
Microfacies 1-Radiolarian mudstone: they correspond to radiolarian mudstone with some<br />
pelagic foraminifera, oxides <strong>and</strong> collophane fragments.<br />
Microfacies 2-Mudstone to fine wackestone: the grains are around 50 µm with stratiform<br />
grain orientation, in a micritic matrix. The identifiable fauna is pelagic foraminifera. It was<br />
encountered in fine-grained turbidites <strong>and</strong> in finer intervals of medium- <strong>and</strong> coarse-grained<br />
intervals (i.e. Te interval).<br />
Microfacies 3-Laminated wackestone: it displays an oblique or stratiform lamination with<br />
a 100-200 µm granulometry range. The fauna is both of shallow water <strong>and</strong> deeper water with<br />
pelagic foraminifera. It is associated to medium-grained <strong>and</strong> coarse-grained turbidites (i.e. Tb<br />
to Td intervals).<br />
Microfacies 4-Grain oriented bioclastic/lithoclastic wackestone-floatstone: the sorting is<br />
poor, the granulometry is around 300µm to 2mm <strong>and</strong> a grain orientation occurs. The<br />
identified fauna is both of shallow water <strong>and</strong> deep water. Platform extraclasts <strong>and</strong> some<br />
mudclasts were also observed. This microfacies is associated to Tb to Td intervals of mediumgrained<br />
<strong>and</strong> coarse-grained turbidites.<br />
Microfacies 5-Bioclastic/lithoclastic wackestone-floatstone: the grains (mean >1mm) are<br />
poorly sorted <strong>and</strong> consist of shallow <strong>and</strong> deep water bioclasts, turbiditic microfacies-like<br />
intraclasts <strong>and</strong> plate-forms extraclasts. This microfacies was encountered in mud-flow levels,<br />
in coarser intervals such as Ta of Bouma (1962) or in topmost of very coarse-grained<br />
calciturbidites.<br />
Microfacies 6-Bioclastic/lithoclastic packstone-rudstone: the sorting is moderate to poor,<br />
the mean granulometry is higher than 300 µm. The components are bioclasts of shallow <strong>and</strong><br />
deep water settings <strong>and</strong> in a lesser degree lithoclasts with mainly extraclasts. This facies is<br />
associated with the coarser intervals (i.e. Ta-Tb) of medium- <strong>and</strong> coarse-grained turbidites.<br />
Microfacies 7-Extraclastic floatstone-rudstone: the sorting is poor, the granulometry is<br />
millimetric to centimetric. The lithoclasts represented by shallow-water extraclasts are<br />
numerous relatively to bioclasts. The bioclasts are of deep-water <strong>and</strong> shallow water origin.<br />
This microfacies was observed locally in three coarser levels (Ta or Tb) of coarse-grained<br />
turbidites.<br />
The consituants of calciturbidites are more or less fragmented fauna <strong>and</strong> lithoclasts.<br />
Shallow-water tests commonly encountered are rudists, large-shelled bivalves <strong>and</strong> benthic<br />
foraminifera (miliolids, rotaliids, orbitoides <strong>and</strong> siderolites sp.) with some omphalocyclus<br />
162
macroporous sp., lepidorbitoides sp., sulcoperculina sp. (Heba G., personal comm.). The deep<br />
water fauna is essentially represented by planctonic foraminifera. Lithoclasts are represented<br />
by extraclasts with various facies: mudstone with fenestrae vugs, mudstone with ostracode<br />
fragments, mudstone with miliolids sp., packstone-grainstone with micritised benthic<br />
foraminifera (miliolids, textularids), grainstones containing shallow water fauna. Locally<br />
some lithoclasts are interpreted to calciturbidites like intraclasts (laminated wackestonespackstones<br />
with foraminifera, pelloids, <strong>and</strong> thin-shelled debris).<br />
The post-resedimentation diagenesis is weak because of the mud-rich facies. Pressure<br />
solution features were observed in rudstone textures with grain contacts. In mudstone to<br />
packstone textures stratiform stylolites are common. In Tb to Td intervals of calciturbidites a<br />
phase of recristallisation occured with local microsparite then sparitic calcite. The field<br />
observations allow to display that sparite recristallisation <strong>and</strong> cherts formation occur very<br />
early in the diagenetic evolution because they appear dislocated <strong>and</strong> distorted in slumped<br />
levels. A later fracturing phase was observed at outcrop scale in Muzina section, with reverse<br />
faults oriented globally N150E with apparent dip around 60E. At the bed scale a fracture<br />
generation displays azimuth around N050E <strong>and</strong> dips from 70° toward NW to vertical. Another<br />
fracture generation relatively less mineralised with azimuth N130E <strong>and</strong> sub-vertical dips was<br />
detected but any obvious chronology was observed between the both generations. Vertical<br />
stylolites are present with directions around N135E. The orientation of veins <strong>and</strong> stylolites are<br />
coherent with a compressive regime in the N040E-N050E direction <strong>and</strong> these microstructures<br />
are consistent with the outcrop-scale reverse faults.<br />
Reservoir properties<br />
In thin section the porosity is visually weak (
Figure 2 – Example of porosity measurements realised on a calciturbiditic sequence <strong>and</strong><br />
thin section photographies<br />
The diagenesis of the resedimented carbonates is slight visible owing to the mud-rich<br />
facies which prevents the precipitation of diagenetic cements. This diagenesis is mainly<br />
marked by compactionnal stylolites <strong>and</strong> recristallisation calcite in laminated intervals of<br />
calciturbidites. Which is interesting is the early setting up of the chert <strong>and</strong> the calcite<br />
recristallisation before the slumping phase. This significates here that these diagenetic<br />
processes occur in the first decameters of sediment depth.<br />
The petrophysical measurements demonstrate a relatively weak matrix porosity which is<br />
due in great part to the mud-rich facies. Besides, the pores are globally disconnected with<br />
important trapped porosity. This demonstrates that matrix porosity does not act as fluid<br />
pathways. In the contrary, at the outcrop-scale numerous fractures <strong>and</strong> stylolites could act as<br />
fluid pathways through the calciturbiditic strata as previously described in the northern zone<br />
(Grahams Wall et al. 2006). The fracturation phase shows directions <strong>and</strong> movements coherent<br />
with the alpine tertiary orogen (Kilias et al., 2001).<br />
References<br />
Bouma A.H., 1962. Elsevier, Amsterdam, 168 p.<br />
Carannante G. et al., 2000, Sedimentary Geology, 132, p.89–123.<br />
Casabianca D. et al., 2002, Journal of Petroleum Geology, 25(2), p. 179-202.<br />
Dewever B. et al., 2007, Sedimentology, 54, p.243–264.<br />
Einsele G. et al., 1991, Springer-Verlag Berlin Heidelberg, New York, 955p.<br />
Kilias A. et al., 2001, Journal of Geodynamics, 31, p.169-187.<br />
Moisiu L., Gurabardhi L., 2004, Gas <strong>and</strong> petroleum geological institute of Fier.<br />
Mullins H.T. & Cook H.E., 1986, Sedimentary Geology 48 : 37-39.<br />
Payros A., Pujalte V., 2008, Earth-Science Reviews, 86, p.203-246.<br />
Ruberti D., 1997, Sedimentary Geology, 113, p.81-110.<br />
Schlüter M. et al., 2008, Cretaceous Research, 29, p.100-114.<br />
Stow D.A.V. et al., 1998, Sedimentary Geology, 115, p.3-31.<br />
Xhavo A., 2002, National Petroleum Agency, Tirana, 24p.<br />
Zappaterra E., 1994, AAPG Bulletin, 78, n°3, p. 333-354.<br />
164
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SHALLOW <strong>and</strong> DEEP CONTROL on the THERMAL STRUCTURE of BASINS as<br />
INFERRED by 3 D NUMERICAL MODELS: EXAMPLES from the CENTRAL<br />
EUROPEAN BASIN SYSTEM<br />
Magdalena SCHECK-WENDEROTH (1) , Mauro CACACE (1,2) , Yuriy MAYSTRENKO (1)<br />
<strong>and</strong> Björn LEWERENZ (1)<br />
(1) Helmholtz Centre Potsdam – GFZ German Research Centre for Geosciences,<br />
Telegrafenberg, D-14473 Potsdam, Germany, (leni@gfz-potsdam.de),<br />
(2) University of Potsdam, Am Neuen Palais 10, D-14473 Potsdam, Germany<br />
The long term availability <strong>and</strong> the large extent of geothermal heat make it an attractive source<br />
for a sustainable supply of energy. However, exploitation of geothermal energy requires a<br />
quantitative resource assessment that must provide a correct identification of the main<br />
physical transport mechanisms involved. To underst<strong>and</strong> the thermal regime on a basin-scale,<br />
we perform 3D numerical simulations of heat transport processes for different areas of the<br />
Central European Basin System. Our results provide new insights on the major controlling<br />
factors of the thermal field <strong>and</strong> indicate that lithosphere-scale factors are superposed with<br />
effects resulting from the spatial interaction of thermal rock properties <strong>and</strong> corresponding<br />
layers’ geometry in the basin. A detailed model describing the geometry of the main<br />
stratigraphic layers is used to properly constrain the lithology-dependent thermal rock<br />
properties. Based on this geological model, the 3D present-day regional conductive<br />
geothermal structure of the basin is simulated. We assess the sensitivity with respect to<br />
contrasting thermal rock properties in the sediment fill <strong>and</strong> with respect to the influence of<br />
different configurations of the crust <strong>and</strong> lithospheric mantle. We find that small wavelength<br />
variations (up to a few kilometers) in the shallow thermal <strong>and</strong> heat flow fields are mainly<br />
influenced by the respective thickness <strong>and</strong> geometry of a salt layer present in the succession.<br />
The chimney effect of the highly conductive salt is counteracted by the isolating effects of<br />
salt-rim syncline sediments. In contrast, the long wavelength character (> 50 km) of the near<br />
surface heat flow <strong>and</strong> temperature distribution is controlled by the configuration of the crust<br />
<strong>and</strong> upper mantle beneath the basin.<br />
165
166
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
The DINARIDES-HELLENIDES as a PART of the CARPATHIANS-ALPS SYSTEM:<br />
ANCIENT <strong>and</strong> RECENT REORGANIZATIONS of a COMPLEX SYSTEM of<br />
MOUNTAIN CHAINS<br />
SCHMID Stephan M. 1 , BERNOULLI Daniel 2 , FUGENSCHUH, B. 3 , MATENCO L. 4 ,<br />
OBERHANSLI, R. 5 , SCHEFER, S. 2 <strong>and</strong> USTASZEWSKI K. 6<br />
1<br />
Geologisch-Paläontologisches Institut Universität Basel & Geophysical Institute ETH<br />
Zürich, Switzerl<strong>and</strong>, Stefan.Schmid@unibas.ch<br />
2<br />
Geologisch-Paläontologisches Institut Universität Basel, Switzerl<strong>and</strong>,<br />
Daniel.Bernoulli@unibas.ch & Senecio.Schefer@unibas.ch<br />
3<br />
Geology & Paleontology Innsbruck University, Austria, Bernhard.Fuegenschuh@uibk.ac.at<br />
4<br />
Department of Tectonics Vrije Universiteit Amsterdam, The Netherl<strong>and</strong>s,<br />
liviu.Matenco@falw.vu.nl<br />
5<br />
Institut für Geowissenschaften Universität Potsdam, Germany, roob@geo.uni-potsdam.de<br />
6<br />
GFZ German Research Centre for Geosciences, Potsdam, Germany, kamilu@gfz-<br />
potsdam.de<br />
A previously published tectonic overview of the Alps, Carpathians <strong>and</strong> Dinarides (Fig. 1;<br />
Schmid et al. 2008) is extended to the Hellenides <strong>and</strong> further into the Taurides <strong>and</strong> Pontides of<br />
Western Turkey. We focus on the discussion of along strike similarities <strong>and</strong> differences of this<br />
orogenic system. Some of the differences are due to ancient (i.e. pre-Miocene) reorganizations<br />
related to the opening <strong>and</strong> closing of the various branches of Tethys (Alpine Tethys,<br />
Neotethys, Paleotethys). Others, however, are due to young <strong>and</strong> rather dramatic modifications<br />
of a pre-existing orogenic system. Such Miocene to recent reorganizations are associated with<br />
processes of slab break-off <strong>and</strong>/or slab-roll back, backarc extension <strong>and</strong> substantial strike-slip<br />
displacements between large composite blocks or microplates such as the so-called Alcapa,<br />
Tisza <strong>and</strong> Dacia Mega-Units.<br />
The Dinarides are juxtaposed with the Alps along the present-day Mid-Hungarian fault zone<br />
(a former transform fault). The Dinarides represent an orogen of opposite subduction polarity<br />
with respect to the Alps. Since about 20Ma ago the easternmost Alps acquired the Dinaridic<br />
subduction polarity, whereby Adria now represents the lower plate (Ustaszewski et al. 2008).<br />
The architecture of the Dinarides can be traced into the Hellenides without difficulty. Major<br />
along strike lateral changes are modest <strong>and</strong> the main problems encountered during<br />
compilation are of nomenclatural nature since the names given to the various units<br />
unfortunately change every time a national boundary is crossed. Both Dinarides <strong>and</strong><br />
Hellenides consist of thrust sheets that formed in Late Cretaceous to Cenozoic times <strong>and</strong> are<br />
built up of Adria-derived continental material <strong>and</strong> previously obducted ophiolites. These<br />
thrust sheets are located in a lower plate position with respect to the upper plate, i.e. the Tisza<br />
<strong>and</strong> Dacia Mega-Units in the northern <strong>and</strong> southern Dinarides, respectively, <strong>and</strong>, at least<br />
temporarily, by the Rhodopes including the Circum-Rhodope belt in the Hellenides (e.g. van<br />
Hinsbergen et al. 2005). The latter extend eastwards into the Pontides of Western Turkey<br />
(Okay 2008). All these upper plate Mega-Units have European affinities. However, those in<br />
the east also incorporate older sutures formed during the closing of Paleotethys. These upper<br />
plate units are separated from the lower plate units, i.e. the units that are commonly referred to<br />
167
as the Dinarides or Hellenides by a Late Cretaceous to Early Paleogene suture zone (named<br />
Sava Zone), which represents that part of the northern branch of Neotethys (the Meliata–<br />
Maliac–Vardar Ocean; Schmid et al. 2008) that stayed open until end-Cretaceous times.<br />
The along-strike changes noted when going from the Dinarides into the Hellenides are<br />
relatively minor <strong>and</strong> gradual: (1) The pelagic Pindos through, which most probably represents<br />
a pelagic seaway underlain by thinned continental crust is absent in the Dinarides north of<br />
Dubrovnik <strong>and</strong> starts to broaden southwards, located between shallow-water carbonate buildups<br />
(the Pelagonian <strong>and</strong> the Gavrovo-Tripolitza realms); (2) The amount of Miocene<br />
shortening affecting southwestern-most forel<strong>and</strong>, associated with the Aegean roll-back,<br />
dramatically increases southwards across the Skutari-Pec <strong>and</strong> the Cephalonia transfer zones;<br />
(3) The Hellenides contrast with the Dinarides by the presence of two intracontinental highpressure<br />
belts that are absent in the Dinarides: an inner one of Eocene age (Cycladic<br />
Blueschist Belt) that can be traced into Turkey <strong>and</strong> an outer one of Miocene age only found<br />
between the Peloponnesus <strong>and</strong> Crete.<br />
The Sava zone of the Dinarides can be followed along strike all the way into the Izmir-Ankara<br />
suture zone. In the Dinarides <strong>and</strong> Hellenides parts of the ophiolites of the northern branch of<br />
the Neotethys Ocean were obducted already during the latest Jurassic onto the Adriatic<br />
margin (Western Vardar Ophiolitic Unit) <strong>and</strong> were subsequently involved in Late Cretaceous<br />
to early Paleogene thrusting. This led to the formation of composite nappes that consist of<br />
continent-derived material in their lower part <strong>and</strong> ophiolites in their upper part. During the<br />
latest Jurassic other parts of the Vardar Ocean (Eastern Vardar Ophiolitic Unit) were also<br />
obducted <strong>and</strong> thrust onto the European margin (i.e. the Dacia Mega-Unit). Our one-ocean<br />
concept does not require the presence of “terranes” separating various oceanic branches along<br />
the Neotethys margin, such as the Drina–Ivanjica block or the Pelagonian “massif”. These<br />
continental units simply represent tectonic windows of the distal Adriatic margin located<br />
below the obducted ophiolitic thrust sheets. Moreover, there is no need for a separate ocean<br />
linked with the Meliata–Maliac ophiolites, because these remnants simply represent the<br />
Triassic-age parts of the Vardar Ocean, preserved as slices within or below ophiolitic<br />
mélanges accreted in front of the obducted Western Vardar ophiolites. This one-ocean logic<br />
can be followed all the way from the Western Carpathians <strong>and</strong> Dinarides into the Hellenides.<br />
In the Hellenides <strong>and</strong> in Western Turkey we find no evidence for a Pindos oceanic lithosphere<br />
(i.e. for the so-called “Pindos Ocean”). The derivation of the protoliths of the Cycladic<br />
Blueschists (predominantly marbles <strong>and</strong> Triassic? mafics), generally also attributed to the<br />
Pindos “Ocean”, from oceanic crust is highly questionable.<br />
A very major change occurs, however, between the Hellenides <strong>and</strong> the Anatolides–Taurides<br />
of Western Turkey. In Turkey, as well as in the Greek isl<strong>and</strong>s of Karpathos <strong>and</strong> Rhodes,<br />
ophiolite obduction clearly occurred during the Late Cretaceous rather than in the Late<br />
Jurassic (Koepke et al. 2002; Okay 2008) <strong>and</strong> was associated with blueschist facies<br />
metamorphism in the immediately underlying accretionary wedge in Western Turkey<br />
(Tavsanli blueschist belt). This suggests the presence of an old <strong>and</strong> not yet understood major<br />
along strike change located somewhere in the easternmost Aegean. On the other h<strong>and</strong> the<br />
Cycladic Blueschist Unit that paleogeographically represents formerly subducted parts of the<br />
Pindos pelagic seaway can easily be traced from the isl<strong>and</strong> of Samos into Western Turkey<br />
(e.g. Rimmelé et al. 2004). There the Cycladic Blueschist Unit overlies the Menderes<br />
“Massif”, probably representing the eastern continuation of the Gavrovo–Tripolitza Zone. The<br />
so-called Lycian nappes that tectonically overlie both the Menderes “Massif “ <strong>and</strong> the<br />
Cycladic Blueschist Unit contain an older, i.e. latest Cretaceous-age blueschist unit (Ören<br />
Unit) at their base. It is suggested that this Ören blueschist belt can be laterally followed into<br />
the Afyon Zone further to the northeast that borders the northern edge of the nonmetamorphic<br />
Taurides (Pourteau et al. 2010a,b). The higher <strong>and</strong> non-metamorphic parts of the<br />
168
Lycian nappes possibly represent an eastern equivalent of the Pelagonian Zone. They are also<br />
overlain by ophiolites that were obducted before final nappe transport in the Cenozoic.<br />
However, obduction occurred in Late Cretaceous (<strong>and</strong> not Late Jurassic) times in the case of<br />
the Lycian nappes. According to this hypothesis, both the Pelagonian Zone <strong>and</strong> the northern<br />
passive margin of the Anatolide–Tauride Block (Lycian nappes) would be part of one <strong>and</strong> the<br />
same micro-plate (or two laterally adjacent microplates), referred to as Adria microplate in the<br />
Western Mediterranean <strong>and</strong> Anatolide–Tauride Block in the Eastern Mediterranean. Both<br />
would represent pieces of Gondwana that broke off the African plate along the opening of the<br />
southern branch of Neotethys (Okay 2008, H<strong>and</strong>y et al. 2010).<br />
Another major along-strike change concerns the southeastern continuation of the Carpatho–<br />
Balkan orogen, a Lower Cretaceous orogen that is located in an upper plate position in respect<br />
to the Dinarides-Hellenides. This east-verging older orogen tectonically overlies the<br />
Rhodopes <strong>and</strong> it is not yet clear if it can be traced further to the southeast <strong>and</strong> into the socalled<br />
Circum-Rhodope Belt. The Rhodopes also represent a part of the European margin <strong>and</strong><br />
hence originally also were northerly adjacent to the Meliata–Maliac–Vardar branch of<br />
Neotethys. However, in contrast to the thrust sheets making up the Dacia Mega-Unit that<br />
overlie the Moesian plate, the Rhodopes were subducted northward below Moesia <strong>and</strong><br />
subsequently exhumed as a huge core complex surrounded by normal faults. Hence, the<br />
Rhodopes formerly were a lower plate unit that was subducted very early on (possibly as early<br />
as during the Jurassic) <strong>and</strong> that is only present in the Hellenides but not in the Dinarides.<br />
Possibly the Rhodopes, or alternatively only the lower part of them (Drama block), formerly<br />
bordered an ocean that was located north of the Meliata–Maliac–Vardar branch of Neotethys.<br />
This more northerly located ocean that only appears when going eastwards into the hinterl<strong>and</strong><br />
of the Hellenides <strong>and</strong> Anatolides–Taurides either was a branch of Neotethys that was<br />
originally located to the north of the Meliata–Maliac–Vardar branch of Neotethys, or<br />
alternatively, was a part of the Paleotethys.<br />
References<br />
H<strong>and</strong>y, M.R., Schmid, S.M., Bousquet, R., Kissling E. & Bernoulli, D. (2010). Reconciling<br />
plate-tectonic reconstructions of Alpine Tethys with the geological-geophysical record<br />
of spreading <strong>and</strong> subduction in the Alps. Earth Science Reviews in press.<br />
Koepke, J., Seidel, E. & Kreuzer H. (2002). Ophiolites on the Southern Aegean isl<strong>and</strong>s Crete,<br />
Karpathos <strong>and</strong> Rhodes: composition, geochronology <strong>and</strong> position within the ophiolite<br />
belts of the Eastern Mediterranean. Lithos 65: 183– 203.<br />
Pourteau, A., C<strong>and</strong>an, O., Oberhänsli, R. & Sudo, M. (2010a) 40Ar/39Ar dating of<br />
subduction-related metamorphism in the Anatolide HP belt, W-Turkey: implications for<br />
the evolution of the Eastern Mediterranean. EGU Vienna Abstract EGU2010-3996.<br />
Pourteau, A., C<strong>and</strong>an, O. & Oberhänsli, R. (2010b). Paleotectonic reconstruction of the<br />
Neotethyan suture in Western-Central Turkey. Tectonics : doi:10.1029/2009TC002650,<br />
in press.<br />
Okay, A.I. (2008). Geology of Turkey: A synopsis. Der Anschnitt 21: 19-42.<br />
Schmid, S.M., Bernoulli, D., Fügenschuh, B., Matenco, L., Schefer, S., Schuster, R., Tischler,<br />
M. & Ustaszewski, K. (2008). The Alpine-Carpathian-Dinaridic orogenic system:<br />
correlation <strong>and</strong> evolution of tectonic units. Swiss Journal of Geosciences 101:139-183.<br />
Rimmelé, G., Parra, T., Goffé, B., Oberhänsli, R., Jolivet, L. & C<strong>and</strong>an O. (2004).<br />
Exhumation paths of high-pressure–low-temperature metamorphic rocks from the<br />
Lycian Nappes <strong>and</strong> the Menderes Massif (SW Turkey): a multi-equilibrium approach.<br />
Journal of Petrology 46: 641-669.<br />
169
Ustaszewski, K., Schmid, S.M., Fügenschuh, B., Tischler, M., Kissling, E. & Spakman, W.<br />
2008: A map-view restoration of the Alpine-Carpathian-Dinaridic system for the Early<br />
Miocene. In: Orogenic processes in the Alpine collision zone (N. Froitzheim & S.M.<br />
Schmid, editors), Swiss Journal of Geosciences 101/Supplement 1: S273–S294.<br />
van Hinsbergen, D.J.J., Hafkenscheid, E., Spakman, W., Meulenkamp, J.E. & Wortel, R.<br />
(2005). Nappe stacking resulting from continental lithosphere below subduction of<br />
oceanic <strong>and</strong> Greece. Geology 33:325–328.<br />
170
Figure 1: Major tectonic units of the Alps, Carpathians <strong>and</strong> Dinarides (from Schmid et al.<br />
2008).<br />
171
172
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
CORRELATION of the WESTERN STRUCTURES of IONIAN ZONE <strong>and</strong> the<br />
RELATION with AFRICAN PLATE (ADRIA MICRO PLATE)<br />
Afat SERJANI & Agim GUCAJ,<br />
Geological Survey of Albania, Tirana, Albania<br />
E-mail: aserjani@yahoo.com<br />
INTRODUCTION<br />
The workshop on sedimentary basins, dynamics <strong>and</strong> active geological processes is for the<br />
authors of this presentation a good chance to review the image of the southwestern<br />
geological structures of Ionian Zone (known as Çika anticline belt). Authors have worked<br />
for long time in ex-Gjirokastra Geological Enterprise leading geological prospecting for<br />
sedimentary solid mineral ores.<br />
Geological structures of Çika anticline belt are correlated forming structural chains in<br />
continuation of common northwest-southeast to Greece. Longitudinal faults, especially<br />
those of typically thrust character testify that Mesozoic carbonate formations of Ionian<br />
Zone, are swimming on the evaporate substratum, which lies directly on the basement of<br />
the oldest, Permian formation. This basement below evaporate rocks, may have important<br />
interest in hydrocarbon generation <strong>and</strong> trapping, amongst the other known upper levels.<br />
The main function in geodynamic processes of structural chains have played mutual<br />
interaction between African Plate (Adria micro plate) or Sazan-Karaborun shallow water<br />
carbonate platform <strong>and</strong> Orogen (Eurasian Plate). The subduction of the platform to the<br />
southeast, underneath the Orogen, it is supposed to get down east up to central part of<br />
Ionian Zone, just there where is Leshnica-Zhulat-Vermiku thrust fault, accompanied by<br />
salt formation, by volcanic <strong>and</strong> metamorphic rocks.<br />
Geodynamic processes of this contact are analogues as the relations between Hellenic<br />
Trench <strong>and</strong> Eurasian Plate south, in Greece, according which there are generated<br />
earthquakes in both countries.<br />
Underneath Fterra <strong>and</strong> Çika over thrusts we suppose buried in depth, western flanks of<br />
these structural chains.<br />
FORMER PUBLICATIONS <strong>and</strong> INTERPRETATIONS<br />
Ionian Zone for long time has been object for prospecting of hydrocarbons <strong>and</strong> solid<br />
sedimentary ores, especially during the intensive development of geological works <strong>and</strong><br />
studies in Albania (1960-1990). Last years, the authors have done the correlation of<br />
geological sheets between Albania <strong>and</strong> Greece. By Gjirokastra Geological Branch,<br />
geological maps in scale 1: 50 000 of Gjirokastra, Delvina, <strong>and</strong> Sar<strong>and</strong>a regions there are<br />
compiled. The new conception of the anticline <strong>and</strong> syncline structural chains, located<br />
opposite each other is put. Structural chains are built by some structural units, placed one<br />
after the other in form of steps.<br />
173
In new geological map of Albania (in sc. 1: 200 000), the eastern contact of Ionian Zone<br />
<strong>and</strong> the age of evaporate substratum there are presented by mistake. Melesini carbonate<br />
massif east belongs to Ionian Zone (Misha V., 1975, Serjani A., 1984), <strong>and</strong> Permian age<br />
of evaporate substratum is determined (Diamanti F., 2002).<br />
In “Thrust Tectonics in Albania” Symposium, held in Tirana ( November, 1990),<br />
Prrenjasi E. (1991) emphasized that limestones are covered under the lower flank of<br />
structures, Tushaj D. et al. (1991) represented carbonate platform (Adria micro plate)<br />
plunged deep to the east below Orogen up to the Vlora-Elbasani-Dibra transversal fault,<br />
retrocharriages from west to the east were presented as well (Serjani A., 1991) .<br />
Papazachos V. K. (2001) argued the distribution of earthquakes along with the contact of<br />
Hellenic Trench with Eurasian Plate <strong>and</strong> further northwest along with the contact of<br />
Apulian Plate (Adria micro plate) with Orogen (Eurasian Plate) as well.<br />
K. A. Nikolaou (2001), determined as the most important factors of hydrocarbon<br />
generation: the reversible <strong>and</strong> thrust faults <strong>and</strong> evaporates. V. Karakitsios, et al. (2001),<br />
as main source of hydrocarbons determined amonitico rosso of Toarian, <strong>and</strong> a specific<br />
horizon inside the evaporates. They suppose that “the potential traps are related to small<br />
anticlines…” D. Mountrakis (2001) has put the idea that during the orogenic processes of<br />
Alpine–Meogean, a migration towards the southwest direction of compression <strong>and</strong><br />
extension tectonic events caused the successive subduction towards the southwest.<br />
The CORRELATION of the STRUCTURAL CHAINS<br />
The authors argue that as all over Ionian Zone, in this area, structures were formed in<br />
form of anticline <strong>and</strong> syncline chains, but later, tectonic events deformed their forms <strong>and</strong><br />
primary position. The main structural chains west of Fterra thrust there are as following<br />
(Fig. 1, 2):<br />
-Syncline chain: Fterra-Shen Vasil-Aliko-Livadhja-Shales-Sajadha Bay in Greece. Below<br />
thrust plane to the east of this syncline chain must be buried the western flank of Fterra<br />
anticline chain, jumping <strong>and</strong> splitting.<br />
-Anticline chain: Qeparo-Kakome-Butrint-Çiflig-Pagane in Greece. Bogazi anticline <strong>and</strong><br />
Mile-Bufi structural nose are part of eastern flank of this anticline chain.<br />
-Syncline chain: Kudhes-Butrinti Bay-Southeastern limit of Korphy Isl<strong>and</strong>.<br />
-Anticline chain: Çika-Pilur-Korphy. On the surface it is outcropped only eastern flank,<br />
placed directly on the thrust plane. Only in Llogara Pass thrust fault coincides with the<br />
contact between African Plate (Adria micro plate) <strong>and</strong> Orogen. Below Çika thrust fault,<br />
underneath the eastern flank, it is buried western flank of this anticline chain, <strong>and</strong> Dukati<br />
syncline chain.<br />
-Syncline chain: Dukat-Western Korphy, which is compressed <strong>and</strong> buried because of the<br />
collision of Adria Platform with Orogen. We think that this chain it is wider <strong>and</strong> covered<br />
in depth.<br />
In above mentioned structural chains there are variation <strong>and</strong> inclinations of the crest lines<br />
as result of orogenic polarity, <strong>and</strong> may be there are formed small structures <strong>and</strong> structural<br />
noses, but all times belonging to the same structural chain.<br />
174
SEISMOGENIC DEEP FAULTS in IONIAN ZONE<br />
The main seismogenic faults in Ionian zone from east to the west there are:<br />
1. Seismogenic fault: Konica-Çarshova-Çorovoda-Ishmi Gorge.<br />
2. Berati thrust fault: Janina-Glina-Dragot-Lushnje–Lales Bay.<br />
3. Central thrust fault of Mali Gjere-Kurveleshi: Leshnica-Delvina-Zhulati-Gusmari-<br />
Vermiku-Bashaj-Selenica-Karavasta Bay.<br />
4. Sajadha-Livadhja-Shen Vasil-Fterra-Matogjini, where it is crossed with central<br />
Kurveleshi fault north.<br />
5. Western thrust fault: Korphy Isl<strong>and</strong>-Dhermi-Llogara-Vlore-Seman, according which<br />
Çika anticline chain was thrusted northwest.<br />
6. At last, to the west it is outcropped the subduction contact of African Plate (Adria<br />
micro plate) with Orogen (Eurasian Plate), which in continuation to the depth east joined<br />
up with the others thrust faults. Evaporate rocks are sprained along with thrust faults up<br />
to the high levels (1300-1500m). Along with planes of thrust faults, in most cases there<br />
are big water springs. The main transversal seismogenic faults there are: Vlora-Elbasan-<br />
Diber, Borsh-Kardhiq, <strong>and</strong> that in center of Korphy Isl<strong>and</strong>.<br />
RELATIONS between PLATES<br />
By the collision of African Plate (Adria micro plate) with Eurasian Plate during Cenozoic<br />
period, the plates were break, crushed, especially in places next to the contact of<br />
subduction, <strong>and</strong> were formed micro plates <strong>and</strong> micro blocks, <strong>and</strong> displacements of thrust<br />
character, along with deep thrust faults.<br />
The contact between African Plate <strong>and</strong> Orogen outcrops only in Llogara, where coincides<br />
with Çika thrust fault <strong>and</strong> in Cefalonian isl<strong>and</strong>s in Greece. To the north <strong>and</strong> south it is<br />
difficult its location, <strong>and</strong> it is more difficult to determine how long <strong>and</strong> how much deep to<br />
the east it is subducted platform underneath the evaporate substratum of Ionian Zone, <strong>and</strong><br />
what relation it has with evaporates <strong>and</strong> with their basement.<br />
Commonly, it is supposed, that platform it is plunged below Pre Adriatic Depression<br />
(PAD) <strong>and</strong> South Adriatic Basin up to the Vlora-Elbasan-Diber transversal fault (Shtreto<br />
Th., et al., 1995, Mehillka Ll., et al., 1995, Tushaj D., et al., 1991), or it is supposed up to<br />
the central fault of Kurveleshi Belt, below the “Miocene basin depocenter” (Guri S., et<br />
al., 1995).<br />
During Liass period, as result of opening of Pangea, the extension forces caused the<br />
formation of the deep faults of southeast-northwest direction <strong>and</strong> creation of differenced<br />
bottom of Ionian Basin, with horsts <strong>and</strong> grabens. In Çika anticline chain the<br />
differentiation was bigger, <strong>and</strong> the basin was relatively less deep. That is reflected in the<br />
small thickness of deposits <strong>and</strong> in breaks in sedimentation.<br />
During Tortonian, the compression forces riche their maximum <strong>and</strong> caused the final<br />
folding of deposits. We think that the folding of Ionian Zone, may be it is more early, as<br />
result of subduction of Neotetis oceanic crust below Cimmeriane-Euroasian Plate since<br />
the Cretaceous-Paleocene <strong>and</strong> by the collision <strong>and</strong> subduction of Adria micro plate<br />
underneath Alpine-Cimmerian-Eurasian Plate during Miocen-Pliocen (Mountrakis D.,<br />
2001). The subduction of Adria caused reversible thrusts, retrocharriages (Serjani, A.<br />
1991, Velaj, T. et al.,1999). According the paleomagnetic studies (C. Kissel, C. Laj,<br />
175
1991), Preapulian <strong>and</strong> Ionian zones have undergone two successive clockwise rotations<br />
of about 25 o each, of Middle Miocene <strong>and</strong> Plio-Quaternary ages respectively. This period<br />
coincides with the subduction of the Adria micro plate underneath Ionian Orogen.<br />
External zones of Albanides <strong>and</strong> Hellenides, during last 15 My have been affected by<br />
displacements which are much more rapid <strong>and</strong> of much larger amplitude than it is<br />
supposed by geological <strong>and</strong> geophysical studies.<br />
Sazan-Karaborun platform (Adria micro plate) it is plunged deep east below the central<br />
part of Ionian Zone, compressing strongly carbonate formation, folding <strong>and</strong> crushing it,<br />
evaporate substratum <strong>and</strong> terrigenous basement of Permian age below evaporates. By<br />
strong compression salt formation was squeezed up to the surface along with thrust faults.<br />
While in central Kurveleshi fault, by the compression from both sides were squeezed to<br />
the surface fragments of basement with volcanic <strong>and</strong> metamorphic blocks <strong>and</strong> windows<br />
of pink color terrigenous series of Permian. We consider this series named “motley serie”<br />
(Seria laramane”) by Isa Bajo (1984) as the basement of evaporate substratum.<br />
Lithological content <strong>and</strong> color are similar with Permian deposits all over Mediterranean<br />
Basin. Stratigraphical <strong>and</strong> space position of this series coincides with the bottom of salt<br />
rocks. The “Cap rock” is formed at the top of evaporate substratum, while this pinkish<br />
packet it is placed at the bottom of gypsum rocks. The absolute geological age, according<br />
the strontium isotope analysis is Lower Permian (the end of Wordian or Middle<br />
Changshigian: 252.5-246My) for Peshkopi, <strong>and</strong> Middle Permian, Lower Artiskian<br />
(266.5My) up to Lower Triassic (245 My) for Dumrea gypsum (Diamanti F., 2002). The<br />
hypothesis of Permian age as basement of evaporates is done <strong>and</strong> argued before (Bajo I.<br />
1984, Serjani <strong>and</strong> Bajo, 1994). At last, it is important to note, that the famous Albanian<br />
specialist of tectonic, <strong>and</strong> the highest authority in geology of Albania, Prof. Vangjel<br />
Melo, since the first view of this packet has given the option of Permian age.<br />
Just this basement below evaporate rocks, due to its lithological content <strong>and</strong><br />
stratigraphical position may have important interest in hydrocarbon generation <strong>and</strong><br />
trapping, amongst the other known upper Mesozoic levels.<br />
CONCLUSIONS<br />
In southwestern part of Ionian Zone structures are not separated, but they form regular<br />
anticline <strong>and</strong> syncline chains of southeast-northwest direction. Their crest lines change<br />
level along with strike down <strong>and</strong> up, in form of steps.<br />
Deep seismogenic faults, have a thrust character from southeast to northwest, but by the<br />
subduction of Adria micro plate underneath the Orogen, retrocharriages from westnorthwest<br />
to east-southeast are happened.<br />
Çika <strong>and</strong> Fterra thrust faults have buried western flanks of anticline chains below the<br />
eastern flanks. Parts of the next syncline chains are buried as well.<br />
Adria micro plate it is sub ducted deep to the east up to the central part of Kurveleshi<br />
anticline belt, jumping <strong>and</strong> squeezing evaporite substratum <strong>and</strong> terrigenous basement of<br />
Permian. The basement below the evaporate substratum, constitute may be a new<br />
interesting level for hydrocarbon generation <strong>and</strong> trapping in Ionian Zone.<br />
REFERENCES<br />
1. Bakiaj H., Bega Z., 1991. Bul. Shk. Gjeol. Nr. 1 Tirane.<br />
176
2. Bajo I., 1984. Evaporitet e zones Jonike. Thesis. Gjirokaster.<br />
3. C. Kissel, C. Laj. 1991. Geodynamic <strong>and</strong> Tectonic Evolution of Northern Greece from<br />
Korphy to Thraki: A Paleomagnetic Approach. Bul. Shk. Gjeol. Nr. 1.<br />
4. Diamanti F. 2002. Formacioni evaporitik ne Shqiperi dhe mundesia e kurthezimeve<br />
hidrokarbure. Bul Shk. Gjeol. Nr. 2, Tirane.<br />
5. Guri S., et al.1995.A summary on geological setting of the Pre-Adriatic Foredeep.<br />
Proceedings: Current <strong>and</strong> Future Problems of oil industry in Albania. Fier.<br />
6. Karakitsios V., Rigakis N. Bakoupulos I. 2001. Migration <strong>and</strong> trapping of the Ionian<br />
series Hydrocarbons (Epirus, NW Greece). The 9-th I. C., Athens.<br />
7. Mehillka Ll. Seiti H., Veizaj V. 1995. Tectonic evaluation of External Albanides.<br />
Proceedings: Current <strong>and</strong> Future Problems of oil industry in Albania. Fier.<br />
8. Mountarkis D. 2001. Tectonic evolution of the Hellenic Orogen. Geometry <strong>and</strong><br />
Kinematics of the Deformations. The 9-th I. C. Athens.<br />
9. Nikolaou K. A. 2001. Origin <strong>and</strong> Migration Mechanism of the main Hydrocarbons seeps<br />
in Western Greece. The 9-th I. C. Athens.<br />
10. Papazachos V. K. 2001. Active Tectonics in the Aegean <strong>and</strong> Surrounding Areas. The 9-th<br />
<strong>International</strong> Congress, Athens, September 2001.<br />
11. Prrenjasi E., Misha V., Bregu H. 1991. Stili tektonik dhe modeli strukturor i rajonit te<br />
Sar<strong>and</strong>es. Bul. Shk. Gjeol. Nr. 1, Tirane.<br />
12. Serjani A., Gucaj A., Husi R., 1986. Te dhena e mendime per tektoniken e brezit<br />
anticlinal te Kurveleshit. Bul. Shk. Gjeol. Nr. 3. Tirane.<br />
13. Serjani A., 1991. Aspekte te tektonikes mbihypese nga perendimi ne lindje ne<br />
rrafshnalten e Kurveleshit ne zonen Jonike. Bul. Shk. Gjeol. Nr. 1. Tirane.<br />
14. Serjani A., Bajo I., 1992 - Outcrops of Magmatic <strong>and</strong> Metamorphic rocks in the Ionian<br />
Zone (Albania). 6 th I. C. Athens. (IGCP 276, Newsletter Nr.6, 1998).<br />
15. Sulstarova E. 1987. Mekanizmi i vatrave te termeteve ne Shqiperi dhe fusha e sforcimeve<br />
tektonike te sotme. Bul. Shk. Gjeol. Nr. 4. Tirane.<br />
16. Shtreto Th., Xhufi Ç., Gjoka M. 1995. Some considerations on the hydrocarbon<br />
exploration in carbonate deposits in Ionian Zone. Proceedings: Current <strong>and</strong> Future<br />
Problems of oil industry in Albania. Fier.<br />
17. Tushaj D., Mehillka Ll., Xhufi Ç., Veizi V. 1991. Modeli strukturor i Albanideve te<br />
Jashtme. Bul. Shk. Gjeol. Nr. 1. Tirane.<br />
18. Velaj T., et al., 1999. Thrust Tectonics <strong>and</strong> the Role of Evaporites in American<br />
Association of Petroleum Geologists, Sept. 1999).<br />
177
178
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ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
HYDROCARBON EVALUATION ASPECTS in MOLASSE RESERVOIRS, VLORË-<br />
ELBASAN REGION, ALBANIA<br />
Prof. Asc. Dr Vilson SILO * , Prof. Asc. Dr Kristaq MUSKA * , Eng. Erald SILO *<br />
*) Faculty of Geology <strong>and</strong> Mining, Tirana – ALBANIA<br />
The molasses deposits contain more than half of the reserves discovered in Albanian territory,<br />
from which more than 20 % are still undeveloped. The space interconnection of molasses<br />
deposits has brought to light the particularities of the geologic structure <strong>and</strong> given full view<br />
of the distribution of the reservoirs in close relation with their formation history. The<br />
paleorelief, mainly shelf, is made up of terraces, valleys <strong>and</strong> erosion uplifts <strong>and</strong> characterized<br />
by the transgression placement of molasses upon the limestone of the eroded structures of the<br />
continental border of the Ionian zone. Their regional connection has made possible the further<br />
improvements in the geologic structure <strong>and</strong> in the individualization of sedimentation<br />
environments. The organic matter present in them, <strong>and</strong> the condition <strong>and</strong> history of the<br />
geologic development have not been favorable to form the hydrocarbons. As a consequence,<br />
the oil is secondary, migrated from the limestone through direct contacts with them. Their oil<br />
<strong>and</strong> gas-bearingness is mainly related to lithological, lithologo-structural, bedded, tectonically<br />
screened <strong>and</strong> irregular reservoirs conditioned by the sedimentation environments. From the<br />
regional viewpoint, the deposits relate to the presence of bays, uplifts <strong>and</strong> erosion scales. The<br />
oil beds are concentrated in traps within the bays <strong>and</strong> outside, as a result of lithological<br />
changes that make possible their preservation. The reserves calculations made as now,<br />
evidencing the general potential of the molasses, have been based on the eastern<br />
classification, <strong>and</strong> been lacking from the economical viewpoint. Often, the analogy to the<br />
worldwide experience has been used. Under these conditions, in relation to reserves re-<br />
evaluation, the surfaces have been determined in accordance with the requirements of<br />
western classification into proven, probable <strong>and</strong> possible reserves increasing reliability.<br />
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179
Attention has been paid in drawing the water-oil contacts where there have been variations by<br />
the change in the structural plane <strong>and</strong> reservoir re-formation.<br />
KEY WORDS: crude oil in the molasses deposits; the main migration ways are the<br />
transgressive contacts in Patos-Verbas, Kuçove <strong>and</strong> Selenica; in general, s<strong>and</strong>stone thickness<br />
increases from south to north <strong>and</strong> from east to west;<br />
REFERENCES<br />
1.- Dore, P., Silo, V., Thomai, L. 2005. “Presence of carbonate structures under throw of<br />
Kruja zone based on the seismic new data in Elbasani region, Albania”. Paper<br />
presented at the 4 th Congress of Balkan Geophysical Society, 9-12 October, Bucharest,<br />
Romania.<br />
2.- Dhimulla I. 1986. “Geochemical conditions of the oil <strong>and</strong> gas field formation in Albanian<br />
�<br />
territory”. National Scientific Center of Hydrocarbons Library, Fier, Albania.<br />
3.- Dhima, S., Prenjasi, E., Guri, S., Silo, V. 2002. “Complex geo-seismic study on thrusting<br />
tectonics <strong>and</strong> reflection of flysch folds at top limestone level in the Ionian zone”. Paper<br />
presented at the 3 -rd Balkan Geophysical Congress <strong>and</strong> Exhibition 24-28 June, Sofia,<br />
Bulgaria.<br />
4.- Gjoka M, Silo V, Sylari V, 2002 . “Geologic construction study of the oil <strong>and</strong> gas<br />
carbonate reservoirs in Albania”. National Scientific Center of Hydrocarbons Library,<br />
Fier, Albania.<br />
5.- Gjoka M, Ranxha S, Gjika A. 2002. “Geologic construction study <strong>and</strong> evaluation of the<br />
oil <strong>and</strong> gas reserves in Kreshpan-Kuçove regions”. National Scientific Center of<br />
Hydrocarbons Library, Fier, Albania.<br />
6.- Silo, V., Nishani, P., etc. 2006. “Seismic data contribution in prospecting carbonate<br />
structures of Ionian zone under of Kruja zone”. Paper presented at the <strong>International</strong><br />
Scientific Symposium “Geo-Mining Potentials-Strategy <strong>and</strong> their Management”, 27-30<br />
September, Mitrovicë, Kosovo.<br />
7.- Silo, V., Nishani, P., Silo, E. 2008. “Hydrocarbon exploration under of Kruja zone in<br />
Tirana-Rodon area, Albania”. Paper presented at the 5 -th Congress of Balkan<br />
Geophysical Society, 5-8 October, Belgrade, Serbia.<br />
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180
�<br />
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
GAS DETECTION in the PERI-ADRIATIC DEPRESSION AREA by TRUE<br />
AMPLITUDE PROCESSING of SEISMIC DATA<br />
Prof. Asc. Dr. Vilson SILO * , Acad.Prof. Dr. Salvatore BUSHATI ** , Eng. Erald SILO *<br />
*) Faculty of Geology <strong>and</strong> Mining, Tirana – ALBANIA<br />
**) Academy of Sciences, Tirana – ALBANIA<br />
Gas potential is related in the Tortonian s<strong>and</strong>stone layers <strong>and</strong> the Miocene-Pliocene<br />
folded structures, as identified from the seismic data. Taking into consideration the<br />
dimensions of the prognosed structures in onshore, considerable reserves of biogenic<br />
<strong>and</strong>/or thermogenic gas are founded in this area. Based on processing seismic data, a<br />
new interpretation is accomplished to evaluate the possible gas bearing targets. An<br />
integrated lithological <strong>and</strong> seismic interpretation method has been used in a real case<br />
study of seismic amplitude anomalies (“bright spots”) related to shallow gas s<strong>and</strong>s<br />
encased in shales. In this paper we give some aspects of true amplitude seismic data<br />
processing <strong>and</strong> seismic attributes for gas detection in some areas of Peri-Adriatic<br />
Depression. The results of this study calibrated on wells serve as guide lines in prospect<br />
evaluation whose expressions on conventional seismic sections are “bright spots”.<br />
Key Words: Gas fields, Gas potential, true amplitude seismic data processing, seismic<br />
attributes for gas detection, molasses sediments of the Peri-Adriatic Depression are<br />
terrigenous in origin <strong>and</strong> consist of clays <strong>and</strong> silts intercalated with s<strong>and</strong>stone beds.<br />
REFERENCES<br />
Denham, L., et al. 1985. The zero-offset stack. 55 th SEG Annual <strong>International</strong> Meeting,<br />
Washington, D.C..<br />
Gary Yu., 1985. Offset amplitude variation <strong>and</strong> controlled amplitude processing.<br />
Geophysics, vol. 50.<br />
181
Hilterman, F.J., 1983. Seismic lithology: Continuing education course. 53 rd SEG<br />
Annual <strong>International</strong> Meeting, Las Vegas.<br />
Ostr<strong>and</strong>er W. J., 1984. Plane wave reflection coefficients for gas s<strong>and</strong> at no normal<br />
angles of incidence. Geophysics, vol. 49.<br />
Rutherford S. R. <strong>and</strong> Williams R. H., 1989. Amplitude versus offset variations in gas<br />
s<strong>and</strong>s. Geophysics, vol. 54.<br />
Silo V., 1994. True amplitude processing of seismic data for gas detection in Peri-<br />
Adriatic Depression area, Albania. PhD Thesis, Polytechnic University of Tirana,<br />
Department of Earth Sciences<br />
Silo V., 2004. Digital processing of seismic data used in petroleum exploration.<br />
Polytechnic University of Tirana, Department of Earth Sciences (Book for<br />
students)<br />
Shuey, R.T., 1985. A simplification of the Zoeppritz equations. Geophysics, vol. 50.<br />
Taner M. T., Koehler F. <strong>and</strong> Sheriff R. E., 1979. Complex seismic trace analysis.<br />
Geophysics, vol.. 44.<br />
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182
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
RECENT SEDIMENTS on VJOSA RIVER DELTAIC LITTORAL<br />
(Mineral composition <strong>and</strong> sedimentology)<br />
(POSTER)<br />
Agim SINOJMERI*, Çerçis DURMISHI*, Ana QORRI*, Eralda DAJA* <strong>and</strong> Erind<br />
ZAÇE*<br />
* Faculty of Geology <strong>and</strong> Mining: sinojmeri@yahoo.com<br />
The Delta of Vjosa River occupies a surface of 317 km 2 <strong>and</strong> forms a littoral of about 22 km.<br />
Following the combination of geological, tectonic, sedimentological as well as oceanographic<br />
processes, the Vjosa delta was displaced several time during the last century.<br />
The deposits of this delta are compiled mainly by s<strong>and</strong>s, silty s<strong>and</strong>s, clays <strong>and</strong> peat clays, but to<br />
the mouth of the river predominates s<strong>and</strong>s <strong>and</strong> silty s<strong>and</strong>s. To the littoral sediments, marine bars,<br />
beach ridges <strong>and</strong> dunes are present. Granulometry analysis reveals the fine granulometry of<br />
these deposits, where the curves morphology indicates a clear differentiation between dunes <strong>and</strong><br />
beach deposits (Figure 1).<br />
Cumulative %<br />
100<br />
90<br />
80<br />
70<br />
60<br />
50<br />
40<br />
30<br />
20<br />
10<br />
0<br />
5/2/3 (beach)<br />
5/1/3 (dune)<br />
Silt 0.075 S<strong>and</strong> 4.75 Gravel<br />
0.425<br />
0.01 0.1 1 10<br />
Grain dimensions (mm)<br />
Figure 1. Granulometric curves of beach sediments <strong>and</strong> dune from site 5 (Vjosa River delta).<br />
Considering the large variety of rock formations (ophiolites, molasses, limestones, flysch)<br />
leached by Vjosa River, the mineral composition of the deltaic sediments present large<br />
variations.<br />
Heavy mineral strata (Figure 2) up to 0.4m thick are observed in deltaic deposits of Vjosa River<br />
compiling marine placers. The heavy minerals constitute up to 60% of the bulk <strong>and</strong> are<br />
concentrated in thin intercalations, up to a few cm thick within these strata.<br />
0.2 mm<br />
Figure 3. Different shapes of<br />
garnets. Sample 4/1/3<br />
Rut<br />
Zr<br />
0.2 mm<br />
Figure 2. Different shapes <strong>and</strong><br />
colors of zircon. Sample<br />
12/1/3
Figure 4. Heavy mineral strata in<br />
the southern part of<br />
Vjosa Delta<br />
Different mineral shape <strong>and</strong> colour indicate different origin of mineral sources. Besides<br />
chromite, which constitutes the majority of the heavy fraction of fine s<strong>and</strong>y deposits in Albania,<br />
in deltaic sediments of Vjosa is detected a large variety of garnets (Figure 3), different shape of<br />
zircon (Figure 4), different type of rutile, as well as traces of monazite <strong>and</strong> xenotine.<br />
Keywords: Beach sediments, Placer, Granulometry, Garnet morphology, Zircon morphology.<br />
REFERENCES<br />
Belousova E. A. Griffin W. L. <strong>and</strong> O’Reilly S. Y., 2006. Zircon crystal morphology, trace<br />
element signature <strong>and</strong> Hf isotope composition as a tool for petrogenetic modeling:<br />
Example from Eastern Australian granitoids. Journal of Petrology, 47, 329-353.<br />
Durmishi Ç., 1997. Bazat e sedimentologjisë. SHBLU, Tiranë.<br />
Durmishi.Ç, Beshku H. et al., 2002-2005. Studimi gjeologo sedimentologjik dhe monitorimi i<br />
hapesires bregdetare te Shqiperise -impaktet ne zhvillimin mjedisor, infrastrukturor ,urban<br />
dhe turistik. Fondi i SH.GJ.SH. Tirane.<br />
Ricci Lucchi F., 1980. Sedimentologia. CLUEB.<br />
Sinojmeri A., 2006. Kristalografia dhe kristalokimia në këndvështrimin e gjeologut. SHBLU<br />
Tiranë.<br />
Trushkova N. N. <strong>and</strong> Kuharenko A.A., 1961. Atlas of placer minerals. VSEGEI.<br />
184
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SEDIMENTOLOGY, DIAGENESIS <strong>and</strong> FRACTURING HISTORY<br />
of the UPPER CRETACEOUS LIMESTONES in the IONIAN ZONE<br />
(CENTRAL <strong>and</strong> SOUTHERN ALBANIA).<br />
Rudy Swennen<br />
Earth <strong>and</strong> Environmental Sciences<br />
K.U.Leuven, Celestijnenlaan 200E<br />
B-3001 Heverlee-Leuven, Belgium<br />
Rudy.Swennen@ees.kuleuven.be<br />
Several of the oil fields in Central <strong>and</strong> Southern Albania are situated in Upper Cretaceous<br />
deep marine limestone turbidites <strong>and</strong> debris flows. Due to the fold- <strong>and</strong> thrust nature of the<br />
external Albanides several reservoir analogue structures are well exposed in the field<br />
(Sar<strong>and</strong>a, Kremenara, …). Based on a regional study using crosscutting relationships<br />
between diagenetic phases (cements, stylolites, veins, reactivated fractures, …) it was possible<br />
to reconstruct the diagenetic history <strong>and</strong> to define the diagenetic stages that exert a major<br />
control on the reservoir properties of these deep marine limestones (Van Geet et al., 2002).<br />
A first important, pre-compactional stage relates to marine burial diagenesis, whereby a<br />
selective cementation of the turbidite matrix is of importance. The amount of ideal nucleation<br />
sites such as rudist debris seems to control the degree of cementation <strong>and</strong> subsequent burial<br />
compaction, explaining the existence of tight <strong>and</strong> porous (oil impregnated) lithologies<br />
(Dewever et al., 2007). A major (initial) porosity destructive process relates to the<br />
development of burial stylolites as well as tectonic stylolites. Notice, however, that in some<br />
areas these stylolites became reactivated <strong>and</strong> some secondary porosity development has been<br />
recognised. Based on the crosscutting relationship with calcite cemented veins, a set of preburial<br />
stylolitisation veins, a set of post- burial but pre-tectonic stylolitisation veins, <strong>and</strong> a set<br />
of post- tectonic stylolitisation veins can be differentiated, whereby only in the last set of<br />
veins indications of the involvement of non-host rock buffered fluids can be inferred based on<br />
the ferroan nature of some of the vein infill as well as the existence of dolomite <strong>and</strong> fluorite<br />
infill phases (Vilasi et al., 2009). Another important diagenetic event is a karstification event,<br />
related to the fore-budge development of some of the anticlinal structures during fold- <strong>and</strong><br />
thrust development. These karsts are however often difficult to recognise. Of major<br />
importance with regard to reservoir development is the reactivation of some of the veins, <strong>and</strong><br />
thus its reopening. It is especially along these veins that major oil seepage in the field can be<br />
seen. The latter may relate to the Miocene reactivation of some of the tectonic movements as<br />
testified the onlapping transgressive conglomerates that now occur as inclined as well as<br />
vertical beds in some of the studied outcrops (Breesch et al., 2007). Noteworthy is the<br />
development of a second set of burial stylolites post-dating conglomerate deposition,<br />
indicating that some deformed areas underwent a rather important second burial.<br />
Reconstruction of the diagenetic history in field analogues is undoubtly a powerful tool to<br />
better underst<strong>and</strong> the control on reservoir performance in Upper Cretaceous deep marine<br />
limestones in Central <strong>and</strong> Southern Albania as well as in the Adriatic Sea.<br />
185
References<br />
Breesch, L., Swennen, R., Dewever, B. <strong>and</strong> Mezini, A., 2007, Deposition <strong>and</strong> diagenesis of<br />
carbonate conglomerates in the Kremenara anticline, Albania: a paragenetic time marker<br />
in the Albanian forel<strong>and</strong> fold-<strong>and</strong>-thrust belt, Sedimentology, 54, 483-496, doi:<br />
10.1111/j.1365-3091.2006.00835.x.<br />
Dewever, B., Breesch, L., Swennen, R. <strong>and</strong> Roure, F., 2007, Sedimentological <strong>and</strong> marine<br />
eogenetic control on porosity distribution in Upper Cretaceous carbonate turbidites<br />
(central Albania), Sedimentology, 54, 243-264, doi: 10.1111/j.1365-3091.2006.00833.x.<br />
Van Geet, M., Swennen, R., Durmishi, C. <strong>and</strong> Roure, F., 2002, Paragenesis of Cretaceous to<br />
Eocene carbonate reservoirs in the Ionian fold <strong>and</strong> thrust belt (Albania): relation<br />
between tectonism <strong>and</strong> fluid flow. Sedimentology, 49, 697-718.<br />
Vilasi, N., Mal<strong>and</strong>ain, J., Barrier, L., Callot J.P., Amrouch, K., Guilhaumou, N., Lacombe, O.,<br />
Muskha, K., Roure, F. <strong>and</strong> Swennen, R., 2009, From outcrop <strong>and</strong> petrographic studies to<br />
basin-scale fluid flow modelling: the use of the Albanian natural laboratory for<br />
carbonate reservoir characterisation. Tectonophysics, 474, 367-<br />
392.doi:10.1016/j.tecto.2009.01.033.<br />
186
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
GEOCHEMICAL CONSTRAINTS (Nd, Pb ISOTOPE RATIOS <strong>and</strong> TRACE<br />
ELEMENTS) on the MESOZOIC VOLCANISM in ALBANIA<br />
Artan TASHKO 1 & Georges H. MASCLE 2<br />
1 Polytechnic University of Tirana, Rruga Elbasanit,355, 1001, Tirana, Albania.<br />
2 Laboratoire de Géodynamique des Chaînes Alpines. Université Joseph Fourier (UJF),<br />
Maison des Géosciences, BP 53, 38041 Grenoble Cedex, France<br />
e-mail:tashkoar@gmail.com<br />
Keywords: Nd <strong>and</strong> Pb isotopes, trace elements, volcanic rocks, geochemistry, Albania.<br />
Three phases of the Mesozoic geodynamic evolution in Albanides can be distinguished, based<br />
on the geochemical characteristics of the volcanic rocks.<br />
1. A rifting phase of the Early Triassic (Permian -Triassic?) to Middle Triassic. 2. Spreading<br />
phase of the Middle Triassic to Middle Jurassic <strong>and</strong> 3. A new spreading phase of the Middle<br />
Jurassic.<br />
During the Early Triassic volcanic rocks were formed, derived from an enriched mantle<br />
source (EMII) in the continental rifting phase. These volcanic rocks are characterized by<br />
negative �Nd values (-1.91), high Th, Zr <strong>and</strong> REE (20–100 times chondrites) content <strong>and</strong><br />
marked negative Eu, Ti <strong>and</strong> Nb-Ta anomalies.<br />
Some Middle Triassic volcanic rocks are characterized by low �Nd values (+0.69 to +1.98),<br />
high Zr <strong>and</strong> REE (3–20 time chondrites) content, but by a very low Th content <strong>and</strong> no marked<br />
Eu <strong>and</strong> Nb-Ta negative anomalies. The magma source is an enriched mantle of type EMI. For<br />
all these volcanic rocks of the first group (samples G13,G9,G11<strong>and</strong> G6) crust contamination<br />
component is evident from the low �Nd values <strong>and</strong> the fractionation of REE, LREE being<br />
clearly enriched compared to HREE.<br />
Subsequently, in the spreading phase, the oceanic crust evolved to the basalts of the volcanosedimentary<br />
series (T2-J1), characterized by higher �Ndi values, ranging from +6.5 to +7.7, a<br />
REE content about 10 times chondrites, flat REE patterns to LREE depleted, no Nb-Ta<br />
negative anomalies, low Th contents (0.2 ppm, on average) <strong>and</strong> a relatively high (1.3 %)<br />
TiO2 content. These basalts series (G1, G2, G8, G10, G12, G14, G15, <strong>and</strong> G16 samples) were<br />
probably formed in an opening of a back-arc basin context (BABBs) from a depleted mantle<br />
magma source (DM). The same magma source produces the basalts of Jurassic western<br />
ophiolite type (J2 basaltic series, sample G7) that have the same geochemical characteristics as<br />
the basalts of the volcano-sedimentary series.<br />
Jurassic volcanic rocks of the eastern ophiolite type (J2 basalt-<strong>and</strong>esitic series, samples G3 <strong>and</strong><br />
G4) show the same geodynamic conditions (i.e. BABBs) but have a distinctively different <strong>and</strong><br />
more depleted magma source (DMM) as evidenced by the lower REE, Ti <strong>and</strong> Zr content,<br />
though, the �Ndi values (+5.58 to +6.94) are quite similar. Significantly lower-than-chondrite<br />
Zr/Hf radios may be explained by a previous zircon fractionation, as zircon mineral is the<br />
primary reservoir for both Zr <strong>and</strong> Hf <strong>and</strong> preferentially incorporates Zr.<br />
187
The Pb isotope ratios of all rocks studied do not testify to the existence of an HIMU<br />
component in the magma source. The observed trend, from OIB volcanism in the southern<br />
part of the Eastern Mediterranean (Cyprus) to back-arc basin basalts associated with arcrelated<br />
<strong>and</strong> with in-plate volcanism in the northern part (Greece), seems to evolve in Albania<br />
with a decreasing role of oceanic within-plate volcanism (enrichment by HIMU source).<br />
Figure 1: Chondrite-normalized REE compositions (normalization values after Sun <strong>and</strong><br />
McDonough,1989). Dashed lines contour the field of the Triassic volcano-sedimentary<br />
series (G10 was the representative sample of this series).<br />
188
Figure 2: Extended multi-element variation plots normalized to primitive mantle<br />
(normalization values after Hoffman, 1988)<br />
189
Figure 3: Th/Yb versus Ta/Yb plot. Fields, after Pearce1983.<br />
Figure 4: Plot of �Ndi vs. 206 Pb/ 204 Pbi for selected volcanics. Isotopic reservoirs after Zingler,<br />
<strong>and</strong> Hart (1986). Samples OT-5, OT-7 <strong>and</strong> OT-17 from Othrys , respectively OIB alkali basalt, BABB<br />
<strong>and</strong> IAT after Monjoie et al.,2008. Sample CY02 from Cyprus alkali basalts ( Lapierre et al. ,2007).<br />
190
REFERENCES<br />
1. Lapierre<br />
H., Bosch D., Narros A., Mascle G.H., Tardy M. & Demant A. The mamonia<br />
complex revisited: remnants of late Triassic intra-oceanic<br />
volcanism along the Tethyan<br />
southwestern passive margin. Geol. Mag., 144, 2007, 1–19.<br />
2. Monjoie<br />
Philippe, Henriette Lapierre, Artan Tashko, Georges H. Mascle, Aline Dechamp,<br />
Bardhyl Muceku, <strong>and</strong> Pierre Brunet. Nature <strong>and</strong> origin of the Triassic volcanism in Albania<br />
<strong>and</strong> Othrys: a key to underst<strong>and</strong>ing the Neotethys<br />
opening? Bulletin de la Societe Geologique de<br />
France, Jul 2008; 179, 2008: 411 – 425.<br />
3. Pearce<br />
J. A. Role of the sub-continental lithosphere in magma genesis at active continental<br />
margin.In Hawkesworth C. J. & Norry<br />
M. J. (eds). Continental Basalts <strong>and</strong> Mantle Xenoliths,<br />
1983, pp. 230–49. Shiva, Nantwich.<br />
4. Sun,<br />
S.S. <strong>and</strong> McDonough, W.F., Chemical <strong>and</strong> isotopic systematics of ocean basalts:<br />
implications for the mantle composition <strong>and</strong> processes. In: Saunders, A.D., Norry, M.J. (Eds).<br />
Magmatism in the ocean basins. Geol. Soc. London Spec. Publ., 42, 1989, 313–345.<br />
5. Zingler,<br />
A. <strong>and</strong> Hart, S.R., Chemical geodynamics. Ann. Rev. Earth Planet. Sci., 14, 1986, 493.<br />
191
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ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
Strength <strong>and</strong> weakness of the World lithosphere<br />
Magdala Tesauro (1), Mikhail K. Kaban (1), Sierd A.P.L Cloetingh (2)<br />
(1) GeoForschungsZentrum Potsdam (GFZ), Germany (2) VU University, The Netherl<strong>and</strong>s,<br />
magdala@gfz-potsdam.de, kaban@gfz.potsdam.de, sierd.cloetingh@falw.vu.nl<br />
Rheology <strong>and</strong> strength of the Earth’s lithosphere have been debated since the beginning of the<br />
last century, when the concept of a strong lithosphere overlying viscous asthenosphere was<br />
introduced. The issue of strength of the lithospheric plates <strong>and</strong> their spatial <strong>and</strong> temporal<br />
variations is important for many geodynamic applications. For rocks with given mineralogical<br />
composition <strong>and</strong> microstructure, temperature is one of the most important parameters<br />
controlling rheology. We present the first world strength map obtained from global crustal<br />
(Fig.1a) <strong>and</strong> thermal models (Fig. 1b). Temperature estimates for the deeper horizons of the<br />
lithosphere, where the heat transport is mostly conductive, requires a precise knowledge of<br />
many crustal parameters (mainly thermal conductivity <strong>and</strong> heat production), which are<br />
extremely uncertain. Therefore, we use a combination of indirect approaches, such as seismic<br />
tomography <strong>and</strong> geothermal analysis (Ritsema <strong>and</strong> Van Hejist, 2004 ; � ermák, 1993).<br />
Furthermore, we implement a global crustal model by assembling the most recent<br />
compilations (e.g. Mooney <strong>and</strong> Kaban, 2010 ; Tesauro et al., 2008). Rheology of the upper<br />
<strong>and</strong> lower crust (Fig.1c) was classified based on a tectonic maps of the World (Mooney,<br />
2009). The results show a good correspondence between strength values <strong>and</strong> geological<br />
features (Fig. 2). Pronounced strength contrasts exist between old cratons <strong>and</strong> areas affected<br />
by the Tertiary volcanism, which are mostly coincident with the boundaries of seimogenic<br />
zones. The Te in the continents (Fig. 3) demonstrates a bimodal distribution around two peaks<br />
at ~25 km, which is the representative value for the continental areas outside of the cratons,<br />
<strong>and</strong> at ~70 km, which is a common value for the cratons. This clustering is probably related to<br />
influence of the plate structure: depending on the ductile strength of the lower crust, the<br />
continental crust can be mechanically coupled or decoupled with the mantle resulting in<br />
highly different Te values. The largest changes of Te occur at sutures that separate different<br />
provinces characterized by major changes in the lithospheric strength. The lithosphere<br />
strength appears to be primary controlled by the crust in the young (Phanerozoic) geological<br />
provinces characterized by low Te (~25 km), high topography (>1000m) <strong>and</strong> seismicity. By<br />
contrast, the old (Achaean <strong>and</strong> Proterozoic) cratons of the continental plates show high Te<br />
(over 100 km), low topography (
References<br />
� ermák, V., 1993. Lithospheric thermal regimes in Europe. Phys. Earth Planet. Int., 79, 179-193.<br />
Ritsema, J., van Heijst, H., 2004.Global transition zone tomography. J. Geophys. Res, 109, B02302,<br />
doi:10.1029/2003JB002610.<br />
Mooney, W.D., 2009. in: Treatise on Geophysics, B. Romanowicz, A. Dziewonski, G. Schubert, Eds.<br />
(Elsevier, Amsterdam, NL), Vol. 1, Chap. 11, pp.361-417.<br />
Mooney, W., Kaban, K., 2010. The North American Upper Mantle: Density, Composition, <strong>and</strong><br />
Evolution,J. Geophys. Res. (in print).<br />
Tesauro, M., Kaban, M.K, .Cloetingh, S.A.P.L., 2008. EuCRUST-07: A new reference model for the<br />
European crust. Geophys. Res. Lett. 35, LXXXXX doi:10.1029/2007GL032244.<br />
Tesauro, M., Kaban, M.K., Cloetingh, S.A.P.L., 2009. A new thermal <strong>and</strong> rheological model of the<br />
European lithosphere. Tectonophysics, 476, 478-495.<br />
194
Fig. 1 (a) Moho depth, (b) Temperature (C˚) at 100 km depth, (c), Global Rheology Map of the<br />
Upper <strong>and</strong> Lower crust. Numbers st<strong>and</strong> as follows: 1, Granite-Mafic garnet granulite, 2, Granite-<br />
Diabase, 3, Quarzite-Diabase, 4, Quarzite-Diorite, 5, Diabase.<br />
195
Fig. 2 Integrated Strength of the lithosphere estimated for compressional conditions (Pa m).<br />
Fig. 3 Lithospheric Elastic Thickness (Te).<br />
196
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
CHARACTERIZATION of the FLUID FLOW in the ALBANIDES FORELAND<br />
FOLD-<strong>and</strong>-THRUST BELT (SOUTHERN ALBANIA)<br />
Nadège VILASI 1 , Jean-Paul CALLOT 2 , Francois ROURE 2 , <strong>and</strong> Rudy SWENNEN 3<br />
1 Statoil ASA, Stavanger NORWAY<br />
2 IFP Energies Nouvelles, Rueil-Malmaison France<br />
3 Katholieke Universiteit Leuven BELGIUM<br />
Albania displays a unique petroliferous forel<strong>and</strong> fold-<strong>and</strong>-thrust belt system. It corresponds to<br />
a complex tectonic assemblage, made up of thin-skinned allochthonous units, progressively<br />
emplaced during the Neogene deformations. The continuous Oligocene to Plio-Quaternary<br />
sedimentary records help to constrain both the burial history of Mesozoic carbonate<br />
reservoirs, the timing of their deformation, <strong>and</strong> the coupled fluid flow <strong>and</strong> diagenetic<br />
scenarios.<br />
The integration of the interactions between petrographic <strong>and</strong> microtectonic studies, kinematic,<br />
thermal <strong>and</strong> fluid flow basin modelling, has been studied in detail. The fracturing of the<br />
reservoir intervals has a pre-folding origin <strong>and</strong> relates to the regional flexuring in the forel<strong>and</strong>.<br />
The first recorded cement has a meteoric origin, implying downward migration <strong>and</strong> the<br />
development of an earlier forebulge in the Ionian Basin. This fluid, which precipitates at a<br />
maximum depth of 1.5 km, is highly enriched in strontium, attesting for important fluid–rock<br />
interaction with the Triassic evaporites, located in diapirs. From this stage, the horizontal<br />
tectonic compression increases <strong>and</strong> the majority of the fluid migrated under high pressure,<br />
characterised by brecciated <strong>and</strong> crack-seal vein. The tectonic burial increased due to the<br />
overthrusting, that is pointed out by the increase of the precipitation temperature of the<br />
cements. Afterwards, up- or downward migration of SO4 2� , Ba 2+ <strong>and</strong> Mg 2+ -rich fluids, which<br />
migrated probably along the décollement level, allows a precipitation in thermal<br />
disequilibrium. This period corresponds to the onset of the thrusting in the Ionian Zone. The<br />
last stage characterised the uplift of the Berati belt, developing a selective karstification due<br />
likely to the circulation of meteoric fluid.<br />
The fluid flow modelling allowed to reconstruct the hydrocarbon generation <strong>and</strong> migration<br />
but also to trace the changes in the water flow through time (origin, migration pathways <strong>and</strong><br />
velocity). The third utility consists of determining the evolution of the overpressuring periods<br />
through time <strong>and</strong> space <strong>and</strong> then to correlate them to the overpressuring periods determined<br />
by studying the fracture-fillings. This will help to place the diagenetic evolution in the<br />
tectonic evolution of the FTB. The main results of the hydrocarbon fluid flow modelling show<br />
that the Upper Cretaceous-Eocene carbonate reservoirs in the Ionian zone have been charged<br />
from the Tortonian onward, <strong>and</strong> that meteoric fluid migration should have intensely<br />
biodegraded the hydrocarbon in place. Concerning the migration paths, it has been<br />
demonstrated that the thrusts act principally as flow barriers in Albania, mainly due the<br />
occurrence of evaporites (non-permeable), except in the forel<strong>and</strong>, where they do not occur.<br />
The results of the modelling demonstrate that the water migrations are dominantly vertical<br />
197
during the flexure of the forel<strong>and</strong>. Then the increase of the sedimentary overburden <strong>and</strong> the<br />
thrusting of the units imply upward water migration under high pore fluid pressure. The<br />
development of a high topographic relief caused large downward <strong>and</strong> lateral meteoric fluid<br />
flow, which is characterised by higher velocities. From the thrusting phase onward, the faults<br />
act as flow barriers, due to the occurrence of evaporites along the décollement levels <strong>and</strong><br />
compartmentalise the reservoir interval.<br />
198
ILP TASK FORCE on SEDIMENTARY BASINS<br />
2010 <strong>International</strong> Workshop<br />
November 7-12, 2010, Tirana (Albania)<br />
SCOPSCO: SCIENTIFIC COLLABORATION on PAST SPECIATION CONDITIONS<br />
in LAKE OHRID (ALBANIA/MACEDONIA) – towards an ICDP DEEP DRILLING<br />
Hendrik VOGEL 1 , B. WAGNER 1 , T. WILKE 2 , A. GRAZHDANI 3 , G. KOSTOSKI 4 , S.<br />
KRASTEL 5 , K. REICHERTER 6 , G. ZANCHETTA 7<br />
1<br />
University of Cologne, Institute of Geology <strong>and</strong> Mineralogy, Cologne, Germany<br />
(vogelh@uni-koeln.de; wagnerb@uni-koeln.de)<br />
2<br />
Institute of Animal Ecology <strong>and</strong> Systematics, Justus Liebig University Giessen, Germany<br />
3<br />
Universiteti Politeknik, Fakulteti i Gjeologjise dhe Minierave, Tirane, Albania<br />
4<br />
Hydrobiological Institute Ohrid, Republic of Macedonia<br />
5<br />
Institute Cluster of Excellence: The Future Ocean, Leibniz Institute of Marine Sciences<br />
(IFM-GEOMAR), Kiel, Germany<br />
6<br />
Institute of Neotectonics <strong>and</strong> Natural Hazards, RWTH Aachen University, Germany<br />
7<br />
Dipartimento di Scienze della Terra, Università di Pisa, Italy<br />
Lake Ohrid is a transboundary lake with approximately two thirds of its surface area<br />
belonging to the Former Yugoslav Republic of Macedonia <strong>and</strong> about one third belonging to<br />
the Republic of Albania. With more than 210 endemic species described, the lake is a unique<br />
aquatic ecosystem <strong>and</strong> a hotspot of biodiversity. This importance was emphasized, when the<br />
lake was declared a UNESCO World Heritage Site in 1979, <strong>and</strong> included as a target area of<br />
the <strong>International</strong> Continental Scientific Drilling Program (ICDP) already in 1993. Though the<br />
lake is considered to be the oldest, continuously existing lake in Europe, the age <strong>and</strong> the<br />
origin of Lake Ohrid are not completely unravelled to date. Age estimations vary between one<br />
<strong>and</strong> ten million years <strong>and</strong> concentrate around two to five million years, <strong>and</strong> both marine <strong>and</strong><br />
limnic origin is proposed.<br />
Extant sedimentary records from Lake Ohrid cover the last glacial/interglacial cycle <strong>and</strong><br />
reveal that Lake Ohrid is a valuable archive of volcanic ash dispersal <strong>and</strong> climate change in<br />
the central northern Mediterranean region. These records, however, are too short to provide<br />
information about the age <strong>and</strong> origin of the lake <strong>and</strong> to unravel the mechanisms controlling<br />
the evolutionary development leading to the extraordinary high degree of endemism.<br />
Concurrent genetic brakes in several invertebrate groups indicate that major geological <strong>and</strong>/or<br />
environmental events must have shaped the evolutionary history of endemic faunal elements<br />
in Lake Ohrid. High-resolution hydroacoustic profiles (INNOMAR SES-96 light <strong>and</strong><br />
INNOMAR SES-2000 compact) taken between 2004 <strong>and</strong> 2008, <strong>and</strong> multichannel seismic<br />
(Mini-GI-Gun) studies in 2007 <strong>and</strong> 2008 demonstrate well the interplay between<br />
sedimentation <strong>and</strong> active tectonics <strong>and</strong> impressively prove the potential of Lake Ohrid for an<br />
ICDP drilling campaign. The maximal sediment thickness is ˜680 m in the central basin,<br />
where unconformities or erosional features are absent. Thus the complete history of the lake is<br />
likely recorded. A deep drilling in Lake Ohrid would help<br />
(i) to obtain more precise information about the age <strong>and</strong> origin of the lake,<br />
(ii) to unravel the seismotectonic history of the lake area including effects of major<br />
earthquakes <strong>and</strong> associated mass wasting events,<br />
199
(iii) to obtain a continuous record containing information on volcanic activities <strong>and</strong> climate<br />
changes in the central northern Mediterranean region, <strong>and</strong><br />
(iv) to better underst<strong>and</strong> the impact of major geological/environmental events on general<br />
evolutionary patterns <strong>and</strong> shaping an extraordinary degree of endemic biodiversity as a matter<br />
of global significance.<br />
For this purpose, five primary drill sites were selected based on the results obtained from<br />
sedimentological studies, tectonic mapping in the catchment <strong>and</strong> detailed seismic surveys<br />
conducted between 2004 <strong>and</strong> 2008. For the recovery of up to ca. 680 m long sediment<br />
sequences at water depths of more than 260 m a newly developed platform operated by<br />
DOSECC shall be used. The drilling operation is planned to take place in 2011.<br />
200