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Seismic expression of glaciomarine deposits in the eastern Riiser Larsen Sea, Antarctica
Kuvaas, B.; Kristoffersen, Y.; Leitchenkov, G.; Guseva, J.; Gandjukhin, V. (2004). Seismic expression of glaciomarine deposits in the eastern Riiser Larsen Sea, Antarctica. Mar. Geol. 207(1-4): 1-15. hdl.handle.net/10.1016/j.margeo.2004.04.004
In: Marine Geology. Elsevier: Amsterdam. ISSN 0025-3227, more
Peer reviewed article  

Available in Authors 

Keyword
    Marine
Author keywords
    Antarctica; Riiser-Larsen Sea; Gunnerus Ridge; glaciomarine deposits; seismics; turbidites; contourites

Authors  Top 
  • Kuvaas, B.
  • Kristoffersen, Y.
  • Leitchenkov, G.
  • Guseva, J.
  • Gandjukhin, V.

Abstract
    By studying multichannel seismic data across the continental slope and rise of the eastern Riiser Larsen Sea and through a comparison with other East Antarctic continental margins, the base of the glaciomarine deposits has been traced in this area. The seismic data reveal the presence of large channel-levee complexes as well as multiple types of contourite accumulations. Downslope and alonglope processes thus interacted in forming the glaciomarine deposits. The deposits are attributed to the advances of ice sheet, delivering huge amounts of sediment to the shelf edge and upper slope during glacial maxima. Oversteepening and instability generated down-slope turbidity currents forming channel–levee complexes whereas the contourite accumulations were probably mostly formed during interglacials. The spatial distribution of the current controlled deposits indicates that bottom currents flow along the western slope of the Gunnerus Ridge.

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