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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

MeBo70 seabed drilling on a polar continental shelf: operational report and lessons from drilling in the Amundsen Sea embayment of West Antarctica
MeBo70 seabed drilling on a polar continental shelf: operational report and lessons from drilling in the Amundsen Sea embayment of West Antarctica
A multibarrel 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 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.
1525-2027
4235-4250
Gohl, K.
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Freudenthal, T.
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Hillenbrand, C.-D.
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Klages, J.
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Larter, R.
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Bickert, T.
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Bohaty, S.
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Ehrmann, W.
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Esper, O.
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Frederichs, T.
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Gebhardt, C.
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Küssner, K.
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Kuhn, G.
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Pälike, H.
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Ronge, T.
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Simões Pereira, P.
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Smith, J.
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Uenzelmann-neben, G.
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Van De Flierdt, C.
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Gohl, K.
d2100687-d94f-4453-8140-ec0c6f430f44
Freudenthal, T.
2c710985-ac7b-436b-a73e-ba9443c04a47
Hillenbrand, C.-D.
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Klages, J.
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Larter, R.
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Bickert, T.
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Bohaty, S.
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Ehrmann, W.
40bba21e-5ad9-4275-acea-bfd058f4c041
Esper, O.
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Frederichs, T.
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Gebhardt, C.
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Küssner, K.
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Kuhn, G.
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Pälike, H.
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Ronge, T.
ca2872d9-9e11-4726-83b3-399281be2719
Simões Pereira, P.
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Smith, J.
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Uenzelmann-neben, G.
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Van De Flierdt, C.
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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. and Van De Flierdt, C. (2017) MeBo70 seabed drilling on a polar continental shelf: operational report and lessons from drilling in the Amundsen Sea embayment of West Antarctica. Geochemistry, Geophysics, Geosystems, 18 (11), 4235-4250. (doi:10.1002/2017GC007081).

Record type: Article

Abstract

A multibarrel 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 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.

Full text not available from this repository.

More information

Accepted/In Press date: 1 October 2017
e-pub ahead of print date: 16 October 2017
Published date: 17 November 2017

Identifiers

Local EPrints ID: 416869
URI: http://eprints.soton.ac.uk/id/eprint/416869
ISSN: 1525-2027
PURE UUID: 5d381ac3-df56-4828-8474-68ce8f2045e3
ORCID for S. Bohaty: ORCID iD orcid.org/0000-0002-1193-7398

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Date deposited: 12 Jan 2018 17:30
Last modified: 07 Oct 2020 01:53

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Contributors

Author: K. Gohl
Author: T. Freudenthal
Author: C.-D. Hillenbrand
Author: J. Klages
Author: R. Larter
Author: T. Bickert
Author: S. Bohaty ORCID iD
Author: W. Ehrmann
Author: O. Esper
Author: T. Frederichs
Author: C. Gebhardt
Author: K. Küssner
Author: G. Kuhn
Author: H. Pälike
Author: T. Ronge
Author: P. Simões Pereira
Author: J. Smith
Author: G. Uenzelmann-neben
Author: C. Van De Flierdt

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