The geochemical and mineralogical fingerprint of West Antarctica's weak underbelly: Pine Island and Thwaites glaciers

Pereira, Patric Simões; van de Flierdt, Tina; Hemming, Sidney R.; Frederichs, Thomas; Hammond, Samantha J.; Brachfeld, Stefanie; Doherty, Cathleen; Kuhn, Gerhard; Smith, James A.; Klages, Johann P.; Hillenbrand, Claus-Dieter ORCID: https://orcid.org/0000-0003-0240-7317. 2020 The geochemical and mineralogical fingerprint of West Antarctica's weak underbelly: Pine Island and Thwaites glaciers. Chemical Geology, 550, 119649. 15, pp. 10.1016/j.chemgeo.2020.119649

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Abstract/Summary

The marine-based West Antarctic Ice Sheet (WAIS) is considered the most unstable part of the Antarctic Ice Sheet, with particular vulnerability in the Amundsen Sea sector where glaciers are melting at an alarming rate. Far-field sea-level data and ice-sheet models have pointed towards at least one major WAIS disintegration during the Late Quaternary, but direct evidence for past collapse(s) from ice-proximal geological archives remains elusive. In order to facilitate geochemical and mineralogical tracing of the two most important glaciers draining into the Amundsen Sea, i.e. Pine Island Glacier (PIG) and Thwaites Glacier (TG), we here provide the first multi-proxy provenance analysis of 26 seafloor surface sediment samples from Pine Island Bay.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1016/j.chemgeo.2020.119649
ISSN:	00092541
Additional Keywords:	West Antarctic Ice Sheet, Sediment provenance, Geochemistry, Pine Island Glacier, Thwaites Glacier
Date made live:	11 May 2020 08:04 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/527660

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