Preface The expedition ARK XIX/3 with the German icebreaking RV ...

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station Penetration (cm) normalized backscatter (dB) Grain size at sample depth PS64/235-3 28 -36.6 2cm: sandy silt, 22cm: silt, smooth change PS64/236-1 20 -39.6 5cm: silty clay, 15cm: clay, change at 5cm PS64/239-1 26 -36.6 1cm: sand, 7cm sandy silt, 16cm: silt, change at 2.5cm, 11cm, 12.5cm PS64/240-1 16 -39.5 3cm: sandy silt, 13cm: silt, change at 6cm, end of core PS64/242-1 10 -41.2 1cm: sand, 6cm: sandy silt, change at 2cm, 9cm PS64/249-1 24 -37.3 3cm: sandy silt, 18cm: silt, change at 6cm PS64/243-1 14 -37.3 2cm: sandy silt, 14cm: silt, change at 5cm PS64/248-1 32 -38.9 1cm, 8cm, 30cm: silt, change at 3, below smooth change PS64/244-1 32 -38.9 4cm: silt, 14: silt, smooth change PS64/247-1 34 -38.9 3cm: silty clay, 15cm: clay, 30cm clay, change at 7cm, below smooth change PS64/245-1 26 -37.0 3cm: silty clay, 25cm: clay, smooth change PS64/246-1 26 -37.0 2cm: silty clay, 13cm: clay, 23cm: clay, change at 5cm, below smooth change - 43 -
A. 4.3 Sedimentary and hydrodynamic processes and interactions in the "Belgica Mound" province, Porcupine Seabight Wheeler, A., Foubert, A., Dorschel, B., Gault, J., Kozachenko, M., Thomsen, L., Unnithan, V. A. 4.3.1 Introduction to the "Belgica Mound" setting Foubert, A. The "Belgica mound" province is characterised by conical mounds asymmetrically buried along the eastern continental margin in the Porcupine Seabight (De Mol et al., 2002; Van Rooij et al., 2003). Multibeam imagery (Beyer et al., 2003) revealed that this part of the basin is dominated by surface mounds and some buried mounds, with a north-south orientation at depths of 500-1000 m. These mounds can rise up to 300 m above the seabed and can measure up to a few km across. Some mounds are characterised by depressions at the steep downslope side of the mounds that are probably the result of strong bottom currents around the mounds (Van Rooij et al., 2003). De Mol et al. (2002) and Van Rooij et al. (2003) attributed the net south-north alignment of the coral banks to the presence of eroded ridges of an acoustically transparent unit of probable Miocene origin. Since corals grow preferentially in elevated locations (Frederiksen et al., 1992; Freiwald, 2002), the local morphological characteristics make this site attractive for deep-sea coral settling and growth. In the vicinity of these large coral mounds, small mounds (the "Moira mounds") exist (Wheeler et al., subm). As well as these mound structures, a multitude of channels are also observed in the area. A large, along-slope, north-south to northeast-southwest channel forms the western limit of the Belgica Mound province. Shallow south-west trending downslope gullies feed into the north-south channel (Van Rooij et al., 2003). Contourite drift systems dominate the sedimentological processes in the Belgica Mound area, shaped by the presence of giant carbonate mounds and channels (Van Rooij et al., 2003). Moreover, high resolution sidescan sonar imagery in inter-mound areas revealed the presence of extensive sand sheets with numerous bedforms (sediment waves, barchan dunes, gravel ridges, seabed striations) indicative of high benthic current strengths and active sediment transport (Wheeler et al.; 2000; Huvenne et al., 2002). During this cruise, focus was placed on mound formation processes, mound dynamics and sediment interactions and biodiversity differences between mounds in the "Belgica Mound" province. Two dives were carried out with the ROV “Victor 6000” (Fig. A4.3.1-1): - 44 -
Page 1 and 2: Preface The expedition ARK XIX/3 wi
Page 3 and 4: B. 1 Cruise leg ARK XIX/3b: An intr
Page 5 and 6: The ARK XIX/3 expedition A. 1 Itine
Page 7 and 8: positioning and navigation of the "
Page 9 and 10: was followed to obtain video materi
Page 11 and 12: On Friday morning the 20 th of June
Page 13 and 14: Fig. A1-2: The working area of the
Page 15 and 16: "Polarstern" (actual air temperatur
Page 17 and 18: 6000" was still at depth "Polarster
Page 19 and 20: aseline navigation antennae which a
Page 21 and 22: Fig. A1-3: Entire cruise track of R
Page 23 and 24: At end of the leg pressure rising b
Page 25 and 26: The temperatures during the cruise
Page 27 and 28: Most frequent wind direction was so
Page 29 and 30: A. 3.1 High resolution seabed mappi
Page 31 and 32: On the other hand, the accuracy of
Page 33 and 34: The sampling campaign was also unde
Page 35 and 36: Hydrosweep DS2 is installed onboard
Page 37 and 38: Fig. A4.2-2: Normalized backscatter
Page 39 and 40: In addition to the micro bathymetry
Page 41 and 42: ackscatter value of -37.0dB, -38.9d
Page 43: athymetry and angular backscatter d
Page 47 and 48: glacial periods. There is also evid
Page 49 and 50: Fig. A4.3.2-2: Visualisation of dif
Page 51 and 52: It seems that all the mounds along
Page 53 and 54: Visible calcareous fauna removed (b
Page 55 and 56: Fig. A4.3.3-2 Location of SAMS Phot
Page 57 and 58: Box Core Sample Log Sheet Station N
Page 73 and 74: A. 4.3.4 Influence of mound topogra
Page 75 and 76: A. 4.3.5 Photo lander deployment on
Page 77 and 78: - UMI data logger controlling a tra
Page 79 and 80: Fig. A4.3.5-3. Close-up view of the
Page 81 and 82: Lineated features are present NE of
Page 83 and 84: CARACOLE Cruise Report 30/07/2001 (
Page 85 and 86: intermediate nepheloid layers (Dick
Page 87 and 88: Fig. A4.4.1-2. Location of main stu
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A. 4.4.3 Biogeoprocesses along the
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Box Core Sample Log Sheet Station N
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in the database with the exact posi
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The areas with significant benthic
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predators and strong bottom current
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faunal distribution. Palaentologica
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ocks predate the last glaciation, s
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A. 4.4.6 Biological and geological
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Hovland M, Croker PF, Martin M (199
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Live fauna Sediments Live fauna and
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sites can subsequently be transport
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4) The NSOW has similar water mass
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0 100 200 300 400 500 600 700 800 P
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A. 4.8 Deep water coral ecology and
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and video observations made. On ret
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Fig. A4.8.2-2: This orange, planar
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Fig. A4.8.2-4: Feather-shaped alcyo
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Fig. A4.8.2-7: Top left) Yellow alc
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scour or demersal trawling. The gro
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survey at frequencies of 38, 70, 12
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"Belgica mounds" - Porcupine Seabig
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"Twin mounds" - Porcupine Bank 14°
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corals were alive, relatively abund
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Network Setup for Tests The setup f
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are only initial testings and much
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pressure produced as a consequence
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surrounded by elevated sediment fea
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B. 2 Microbathymetry on ROV "Victor
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Pitch correction Due to assembling
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Maps Complete area Håkon Mosby Mud
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B. 3 Geochemistry, geophysics and s
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Heat Flow HMMV 2m # # # # # # # # #
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Lat_dec. Lon_dec Name k T_0m PS64/s
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Temperature / Gravity Corer # GC9 #
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Table B3.2-1: Technical specificati
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Sound velocity: As the cores all co
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Fig. B3.3-1: Display of a 4 km long
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sediment cores varies between 166 t
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Fig. B3.4-1b: Lithological descript
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Fig. B3.4-1d: Lithological descript
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Fig. B3.4-1f: Lithological descript
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hydrotroilite and gas hydrate, this
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As an example, a echo sounder image
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B. 5 Biological investigations at t
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- How much methane is oxidized aero
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profiler). Bottom water samples hav
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the water column was measured using
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1 kg of tubeworms in wet weight. Th
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B. 5.2 Microscale analysis of the s
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Laboratory measurements Central sit
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O2, CO3-- (mM) Beggiatoa mats, 30/0
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Photograph of the sulfide oxidising
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Central area No measurements could
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the temperature profile showed adve
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B. 5.3 Methane in gas hydrate beari
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The deployments covered 3 (5) diffe
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flows at the Håkon Mosby Mud Volca
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The quality of the mosaics depends
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[2] Vincent AG, Pessel N, Borgetto
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### ( ) # ###### # ## # # # #### #
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References Milkov, A., Vogt, P., Ch
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ROV "Victor 6000" The ROV "Victor 6
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has spent in organising the coring
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A multiple corer was used to retrie
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At the position of the moorings a C
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Micro profiles of O 2 but also of p
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The current regime luff and lee sid
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2° 3° 4° N2 5° PS64/481 PS64/48
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station IRD archive liner bulk x-ra
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C. 4 Marine Geology Kukina, N. Majo
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2° 3° 4° 5° 6° PS64/481 79°20
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Appendix 1: List of samples for fut
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- 248 -
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- 250 -
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material via the Transpolar Drift t
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ounding processes as well. One poss
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The most frequent rock type is sand
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Eastern Greenland, Iceland and Scan
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C. 6 Debris on the seafloor at “H
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Results A summary of the results is
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enthic community are of crucial imp
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frame showed no obvious colonisatio
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subsamples (area of 400 - 800 cm 2
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using shipboard techniques - provid
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Tab C11-1: Stationlist of in situ m
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Tab. C11-2: In-situ measurements of
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Tab. C11-2: In-situ measurements of
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Climate models predict that global
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90 mean copepod densities/ 10 cm 2
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- Molecular phylogeny and phylogeog
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Species Stations Tmetonyx sp.1 326-
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was used to terminate and sample th
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openings of 45° at both sides the
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Station Date Time PositionLat Posit
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E. Participating institutes / compa
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Acronym Participants iSiTEC GmbH IS
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F. Participants F. 1 Participants A
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F. 2 Participants ARK XIX/3b Armand
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F. 3 Participants ARK XIX/3c Bauerf
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Preface The expedition ARK XIX/3 with the German icebreaking RV ...

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