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MeBo70 seabed drilling on a polar continental shelf: operational report and lessons from drilling in the Amundsen Sea Embayment of West Antarctica

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Title: MeBo70 seabed drilling on a polar continental shelf: operational report and lessons from drilling in the Amundsen Sea Embayment of West Antarctica
Authors: Gohl, K
Freudenthal, T
Hillenbrand, C-D
Klages, J
Larter, R
Bickert, T
Bohaty, S
Ehrmann, W
Esper, O
Frederichs, T
Gebhardt, C
Küssner, K
Kuhn, G
Pälike, H
Ronge, T
Simões Pereira, P
Smith, J
Uenzelmann-Neben, G
Van de Flierdt, T
Science Team of Expedition PS104
Item Type: Journal Article
Abstract: A multi-barrel seabed drill rig was used for the first time to drill unconsolidated sediments and consolidated sedimentary rocks from an Antarctic shelf with core recoveries between 7 and 76%. We deployed the MARUM-MeBo70 drill device at nine drill sites in the Amundsen Sea Embayment. Three sites were located on the inner shelf of Pine Island Bay from which soft sediments, presumably deposited at high sedimentation rates in isolated small basins, were recovered from drill depths of up to 36 m below seafloor. Six sites were located on the middle shelf of the eastern and western embayment. Drilling at five of these sites recovered consolidated sediments and sedimentary rocks from dipping strata spanning ages from Late Cretaceous to Miocene. This report describes the initial coring results, the challenges posed by drifting icebergs and sea ice, and technical issues related to deployment of the MeBo70. We also present recommendations for similar future drilling campaigns on polar continental shelves.
Issue Date: 16-Oct-2017
Date of Acceptance: 1-Oct-2017
URI: http://hdl.handle.net/10044/1/51889
DOI: https://dx.doi.org/10.1002/2017GC007081
ISSN: 1525-2027
Publisher: American Geophysical Union
Start Page: 4235
End Page: 4250
Journal / Book Title: Geochemistry, Geophysics, Geosystems
Volume: 18
Issue: 11
Copyright Statement: © 2017. American Geophysical Union
Keywords: Science & Technology
Physical Sciences
Geochemistry & Geophysics
MeBo70 seabed drill
Antarctic shelf
glacial-marine sediments
Amundsen Sea
PINE ISLAND BAY
GROUNDING-LINE RETREAT
LAST GLACIAL MAXIMUM
ICE-SHEET RETREAT
HISTORY
DYNAMICS
RECORD
DRIVEN
04 Earth Sciences
02 Physical Sciences
Publication Status: Published
Appears in Collections:Faculty of Engineering
Earth Science and Engineering



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