Marine geological investigation of Edward VIII Gulf, Kemp Coast, East Antarctica

Isabel A. Dove, Amy Leventer, Meredith J. Metcalf, Stefanie A. Brachfeld, Robert B. Dunbar, Patricia Manley, Amelia E. Shevenell, Richard W. Murray, Matthew Hommeyer, Kelly A. Kryc, Natalie McLenaghan, Fiona Taylor, Bruce A. Huber

Research output: Contribution to journalArticle

Abstract

A physical oceanographic, geophysical and marine geological survey of Edward VIII Gulf, Kemp Coast, collected data from conductivity-temperature-depth casts, multi-beam bathymetric swath mapping and 3.5 kHz sub-bottom surveying. Modified circumpolar deep water (mCDW) is observed in Edward VIII Gulf, as well as notable bathymetric features including mega-scale glacial lineations and a 1750 m-deep trough. Sedimentological, geochemical, rock-magnetic and micropalaeontological analysis of two kasten cores document regional palaeoclimate and palaeo-oceanographic conditions over the past 8000 years, with a warm period occurring from c. 8 to 4 ka and a shift to cooler conditions beginning at c. 4 ka and persisting until at least 0.9 ka. Sediment packages > 40 m thick within deep troughs in Edward VIII Gulf present potential targets for higher-resolution Holocene and deglacial climate studies. Despite the presence of mCDW on the shelf, inland bed topography consisting of highland terrain suggests the likelihood of relative stability of this sector of the East Antarctic Ice Sheet.

Original languageEnglish
Pages (from-to)210-222
Number of pages13
JournalAntarctic Science
Volume32
Issue number3
DOIs
StatePublished - 1 Jun 2020

Keywords

  • East Antarctic Ice Sheet
  • Holocene
  • ice-sheet stability
  • mCDW
  • palaeoclimate
  • sediment cores

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    Dove, I. A., Leventer, A., Metcalf, M. J., Brachfeld, S. A., Dunbar, R. B., Manley, P., Shevenell, A. E., Murray, R. W., Hommeyer, M., Kryc, K. A., McLenaghan, N., Taylor, F., & Huber, B. A. (2020). Marine geological investigation of Edward VIII Gulf, Kemp Coast, East Antarctica. Antarctic Science, 32(3), 210-222. https://doi.org/10.1017/S0954102020000097