MeBo70 Seabed Drilling on a Polar Continental Shelf: Operational Report and Lessons From Drilling in the Amundsen Sea Embayment of West Antarctica

Gohl, K.; Freudenthal, T.; Hillenbrand, Claus-Dieter ORCID: https://orcid.org/0000-0003-0240-7317; Klages, J.; Larter, Robert ORCID: https://orcid.org/0000-0002-8414-7389; Bickert, T.; Bohaty, S.; Ehrmann, W.; Esper, O.; Frederichs, T.; Gebhardt, C.; Küssner, K.; Kuhn, G.; Pälike, H.; Ronge, T.; Simões Pereira, P.; Smith, James ORCID: https://orcid.org/0000-0002-1333-2544; Uenzelmann-Neben, G.; 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. 10.1002/2017GC007081

Before downloading, please read NORA policies.

Preview

Text
Copyright American Geophysical Union
ggge21428.pdf - Published Version
Download (8MB) | Preview

Official URL: http://dx.doi.org/10.1002/2017GC007081

Abstract/Summary

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.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1002/2017GC007081
ISSN:	15252027
Additional Keywords:	MeBo70 seabed drill, Antarctic shelf, glacial-marine sediments, Amundsen Sea
Date made live:	11 Jan 2018 13:34 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/518933

Item Type:

Publication - Article

Digital Object Identifier (DOI):

10.1002/2017GC007081

ISSN:

15252027

Additional Keywords:

MeBo70 seabed drill, Antarctic shelf, glacial-marine sediments, Amundsen Sea

Date made live:

11 Jan 2018 13:34 +0 (UTC)

URI:

https://nora.nerc.ac.uk/id/eprint/518933