DACIAN BASIN - GeoEcoMar

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The analysis of the paleogeographic evolution represents an important approach for the investigation of the sedimentary history of a basin. Paleogeographic changes reflect the influence of factors (tectonic, climate), which also control the sediment provenance and sediment accumulation processes. 2.1. DACIAN BASIN PALEOgEOgRAPHIC EvOLUTION: ITS BEgIN- NINgS, DEvELOPMENT AND FILLINg 2.1.1. Paleogeographic maps The Dacian Basin paleogeographic analysis is based on local (Dacian Basin) and regional (Paratethys domain) paleogeographic maps. Dacian Basin paleogeographic maps. At the beginning of the Dacian Basin paleogeographic studies, the accumulation of information was strictly constrained to the Romanian territory. The first atlas dealing with the Dacian Basin paleogeography was published as the 4 th volume of the Lithofacies Atlas of Romania, dedicated to the Neogene time (Saulea et al., 1969). The atlas includes 13 plates, 11 of which are 1:2,000,000 scale lithofacies maps of the Aquitanian – Romanian (former Levantine) deposits. The 1969 issue is the second, final edition of the Neogene lithofacies maps. The first edition was published in 1964 with 1:500.000 scale maps. The name “lithofacies atlas” does not correspond totally to the data available in the atlas. The maps produced by Saulea et al. (1969) include a rather large array of information. In addition to the lithological information, the atlas presents the paleogeographical extent of the sedimentary areas, including the continental areas (high altitude and low plains). Biostratigraphical data and paleoecological zones reflecting the paleosalinity were also mapped. The map for each interval shows the lithology and the sediment thickness (isopach map). The provenance 40 Chapter 2 DACIAN BASIN PALEOgEOgRAPHY. SEDIMENTOLOgICAL INTERPRETATION
2.1. Dacian Basin paleogeographic evolution: its beginnings, development and filling of data used, mostly subsurface information, is marked on a special sheet of the atlas. The paleogeographic maps have been prepared at rather small time intervals (Fig. 2.1): Early-Middle Sarmatian (s. l.), Middle-Late Sarmatian (s. l.), Maeotian, Early Pontian, Late Pontian-Dacian and Romanian (Levantine). The Saulea et al. (1969) Neogene paleogeographic atlas represents the basic framework required for any future project on Dacian Basin. However, the maps lack data in the areas where the Dacian Basin extends out of the Romanian territory, to the south of Danube River, offering an incomplete image of the basin. Several years before the Neogene paleogeographic atlas of Romania of Saulea et al. (1969) was published, a similar collection of paleogeographic maps was drawn at the Research Institute of the Romanian Oil Ministry (Hristescu et al., 1962-1963) 1 . Unfortunately this atlas was not made available for public viewing, being in the format of a scientific report, and kept private. The paleogeographic maps of Saulea et al. (1969) have been updated and developed by Papaianopol et al., 1987 and Marinescu and Papaianopol (1989, 1995, 2003). The new work advances the paleogeograhic knowledge of the Lower, Middle and Upper Pontian times of the Dacian Basin. New paleogeographic maps have been presented for the Dacian and Romanian times. Connections of the Dacian Basin with marine bodies which could explain the calcareous nannoplankton occurrences have been studied by Mărunţeanu (2006). Paratethys paleogeographic maps. The understanding of the Dacian Basin evolution within the Paratethys domain improved with the publication of the Central and Eastern Europe paleogeographic atlas (Hamor et al., 1988). The easternmost part of Paratethys (Caspian Basin and the Black Sea Depression) is not included in the Central and Eastern Europe atlas. Three paleogeographic maps display the Paratethys realm during the existence of the Dacian Basin (Fig. 2.1). The paleogeographic image of the entire Paratethys domain is incorporated in the atlas of Peritethys (Dercourt et al., 2000). Only two maps are devoted to the time span of Dacian Basin existence (Fig. 2.1). The lithologic - paleogeographic work of Popov et al. (2004) is dedicated to the Paratethys domain. Four maps (Fig. 2.1) of the Popov et al. (2004) paleogeographic atlas represent the Late Neogene time when the Dacian Basin was part of the Paratethys realm. 1 Hristescu, E., Constantinescu, I., Micşa, L., Bosoancă, G., Grigorescu, M., Burlacu, A., Ichim, T., Vasilescu, E., Vasiliu, M., Cristodulo, D., Diaconescu, R., Dicea, M., 1962-1963. Atlasul hărţilor litologo-paleogeografice ale sedimentarului din R.P.R. Ministerul Industriei Petrolului si Chimiei, D.G.F.E.T.-T.E.G., Intreprinderea de Laboratoare Geologice. Unpublished report. 41
Page 1: Dan C. Jipa, Cornel Olariu DACIAN B
Page 5: Dedicated to the memory of Prof. Gh
Page 8 and 9: NATIONAL INSTITUTE OF MARINE GEOLOG
Page 11 and 12: CONTENTS Foreword and Acknowledgeme
Page 13 and 14: Contents Chapter 7. The Point Bar F
Page 15 and 16: FOREwORD AND ACkNOwLEDgEMENTS The s
Page 17: PLATE 1. Location of the Dacian Bas
Page 20 and 21: 18 Chapter 1. Dacian Basin. General
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92 Chapter 4. Dacian Basin Physiogr
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94 Chapter 5. Littoral Sedimentary
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Fluvial sedimentation played a majo
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The large and continuous rock expos
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190 Chapter 8. The Paleoenvironment
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The evolution and architecture of a
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200 Chapter 9. Source-Areas in the
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10.1. SEDIMENT ACCUMULATION AREAS I
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Ai n s w o r t h r. B., Cr o w l e
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258 References hA m o r, g., et al.
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262 References ră d A n, s.C., 200
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264 References VAsilieV, i., Kr iJ
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DACIAN BASIN - GeoEcoMar

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