Research output: Contribution to journal › Article › peer-review
Seismic expression of glaciomarine deposits in the eastern Riiser Larsen Sea, Antarctica. / Kuvaas, B.; Kristoffersen, Y.; Leitchenkov, G.; Guseva, J.; Gandjukhin, V.
In: Marine Geology, Vol. 207, No. 1-4, 30.06.2004, p. 1-15.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Seismic expression of glaciomarine deposits in the eastern Riiser Larsen Sea, Antarctica
AU - Kuvaas, B.
AU - Kristoffersen, Y.
AU - Leitchenkov, G.
AU - Guseva, J.
AU - Gandjukhin, V.
PY - 2004/6/30
Y1 - 2004/6/30
N2 - 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.
AB - 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.
KW - Antarctica
KW - contourites
KW - glaciomarine deposits
KW - Gunnerus Ridge
KW - Riiser-Larsen Sea
KW - seismics
KW - turbidites
UR - http://www.scopus.com/inward/record.url?scp=3042848608&partnerID=8YFLogxK
U2 - 10.1016/j.margeo.2004.04.004
DO - 10.1016/j.margeo.2004.04.004
M3 - Article
AN - SCOPUS:3042848608
VL - 207
SP - 1
EP - 15
JO - Marine Geology
JF - Marine Geology
SN - 0025-3227
IS - 1-4
ER -
ID: 35965354