East Antarctic ice stream tributary underlain by major sedimentary basin

Bamber, Jonathan L.; Ferraccioli, Fausto ORCID: https://orcid.org/0000-0002-9347-4736; Joughin, Ian; Shepherd, Tony; Rippin, David M.; Siegert, Martin J.; Vaughan, David G. ORCID: https://orcid.org/0000-0002-9065-0570. 2006 East Antarctic ice stream tributary underlain by major sedimentary basin. Geology, 34 (1). 33-36. https://doi.org/10.1130/G22160.1

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Abstract/Summary

Marine and rift sediments exert a fundamental control on ice stream flow in the West Antarctic Ice Sheet, and hence on its mass balance and stability. In contrast, most ice streams in the much larger East Antarctic Ice Sheet are thought to be relatively stable features resting on till, perhaps underlain by crystalline rock. Any geological controls on East Antarctic Ice Sheet enhanced flow remain largely unknown. We present aerogeophysical evidence indicating that a region of enhanced ice flow in the interior of the East Antarctic Ice Sheet is underlain by subglacial sediments 3 km thick and that these are influencing the flow regime of the overlying ice. We show that subglacial sediments are important in modulating ice dynamics, not just for the West Antarctic Ice Sheet, but also for its much larger neighbor, and suggest that the sedimentary basin identified here may contain information on the Neogene glacial history of this part of the East Antarctic Ice Sheet.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1130/G22160.1
Programmes:	BAS Programmes > Antarctic Funding Initiative Projects
ISSN:	0091-7613
Format Availability:	Electronic, Print
Additional Information. Not used in RCUK Gateway to Research.:	Full text not available from this repository
Additional Keywords:	Ice streams ; Flow ; Sedimentary basins ; Surveys ; Geophysical
NORA Subject Terms:	Glaciology Earth Sciences
Date made live:	17 Aug 2007 12:53 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/11

Item Type:

Publication - Article

Digital Object Identifier (DOI):

https://doi.org/10.1130/G22160.1

Programmes:

BAS Programmes > Antarctic Funding Initiative Projects

ISSN:

0091-7613

Format Availability:

Electronic, Print

Additional Information. Not used in RCUK Gateway to Research.:

Full text not available from this repository