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Input of glaciomarine sediments along the East Antarctic continental margin; depositional processes on the Cosmonaut Sea continental slope and rise and a regional acoustic stratigraphic correlation from 40° W to 80° E. / Kuvaas, Berit; Kristoffersen, Y.; Guseva, J.; Leitchenkov, G.; Gandjukhin, V.; Kudryavtsev, G.

в: Marine Geophysical Researches, Том 25, № 3-4, 01.09.2004, стр. 247-263.

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Kuvaas, Berit ; Kristoffersen, Y. ; Guseva, J. ; Leitchenkov, G. ; Gandjukhin, V. ; Kudryavtsev, G. / Input of glaciomarine sediments along the East Antarctic continental margin; depositional processes on the Cosmonaut Sea continental slope and rise and a regional acoustic stratigraphic correlation from 40° W to 80° E. в: Marine Geophysical Researches. 2004 ; Том 25, № 3-4. стр. 247-263.

BibTeX

@article{5efb6ffb172d45d7afd77cc787867f2d,
title = "Input of glaciomarine sediments along the East Antarctic continental margin; depositional processes on the Cosmonaut Sea continental slope and rise and a regional acoustic stratigraphic correlation from 40° W to 80° E",
abstract = "Multichannel seismic reflection data from the Cosmonaut Sea margin of East Antarctica have been interpreted in terms of depositional processes in the continental slope and rise area. A major sediment lens is present below the upper continental rise along the entire Cosmonaut Sea margin. The lens probably consists of sediments supplied from the shelf and slope, being constantly reworked by westward flowing bottom currents, which redeposited the sediments into a large scale drift deposit prior to the main glaciogenic input along the margin. High-relief semicircular or elongated depositional structures are also found on the upper continental rise stratigraphically above the regional sediment lens, and were deposited by the combined influence of downslope and alongslope sediment transport. On the lower continental rise, large-scale sediment bodies extend perpendicular to the continental margin and were deposited as a result of downslope turbidity transport and westward flowing bottom currents after initiation of glacigenic input to the slope and rise. We compare the seismostratigraphic signatures along the continental margin segments of the adjacent Riiser Larsen Sea, the Weddell Sea and the Prydz Bay/Cooperation Sea, focussing on indications that may be interpreted as a preglacial-glaciomarine transition in the depositional environment. We suggest that earliest glaciogenic input to the continental slope and rise occurred in the Prydz Bay and possibly in the Weddell Sea. At a later stage, an intensification of the oceanic circulation pattern occurred, resulting in the deposition of the regional plastered drift deposit along the Cosmonaut Sea margin, as well as the initiation of large drift deposits in the Cooperation Sea. At an even later stage, possibly in the middle Miocene, glacial advances across the continental shelf were initiated along the Cosmonaut Sea and the Riiser Larsen Sea continental margins.",
keywords = "Antarctica, Bottom currents, Contourites, Cosmonaut Sea, Glacial advances, Glaciomarine sediments, Prydz Bay, Riiser Larsen Sea, Turbidites, Weddell Sea",
author = "Berit Kuvaas and Y. Kristoffersen and J. Guseva and G. Leitchenkov and V. Gandjukhin and G. Kudryavtsev",
year = "2004",
month = sep,
day = "1",
doi = "10.1007/s11001-005-1321-4",
language = "English",
volume = "25",
pages = "247--263",
journal = "Marine Geophysical Research",
issn = "0025-3235",
publisher = "Springer Nature",
number = "3-4",

}

RIS

TY - JOUR

T1 - Input of glaciomarine sediments along the East Antarctic continental margin; depositional processes on the Cosmonaut Sea continental slope and rise and a regional acoustic stratigraphic correlation from 40° W to 80° E

AU - Kuvaas, Berit

AU - Kristoffersen, Y.

AU - Guseva, J.

AU - Leitchenkov, G.

AU - Gandjukhin, V.

AU - Kudryavtsev, G.

PY - 2004/9/1

Y1 - 2004/9/1

N2 - Multichannel seismic reflection data from the Cosmonaut Sea margin of East Antarctica have been interpreted in terms of depositional processes in the continental slope and rise area. A major sediment lens is present below the upper continental rise along the entire Cosmonaut Sea margin. The lens probably consists of sediments supplied from the shelf and slope, being constantly reworked by westward flowing bottom currents, which redeposited the sediments into a large scale drift deposit prior to the main glaciogenic input along the margin. High-relief semicircular or elongated depositional structures are also found on the upper continental rise stratigraphically above the regional sediment lens, and were deposited by the combined influence of downslope and alongslope sediment transport. On the lower continental rise, large-scale sediment bodies extend perpendicular to the continental margin and were deposited as a result of downslope turbidity transport and westward flowing bottom currents after initiation of glacigenic input to the slope and rise. We compare the seismostratigraphic signatures along the continental margin segments of the adjacent Riiser Larsen Sea, the Weddell Sea and the Prydz Bay/Cooperation Sea, focussing on indications that may be interpreted as a preglacial-glaciomarine transition in the depositional environment. We suggest that earliest glaciogenic input to the continental slope and rise occurred in the Prydz Bay and possibly in the Weddell Sea. At a later stage, an intensification of the oceanic circulation pattern occurred, resulting in the deposition of the regional plastered drift deposit along the Cosmonaut Sea margin, as well as the initiation of large drift deposits in the Cooperation Sea. At an even later stage, possibly in the middle Miocene, glacial advances across the continental shelf were initiated along the Cosmonaut Sea and the Riiser Larsen Sea continental margins.

AB - Multichannel seismic reflection data from the Cosmonaut Sea margin of East Antarctica have been interpreted in terms of depositional processes in the continental slope and rise area. A major sediment lens is present below the upper continental rise along the entire Cosmonaut Sea margin. The lens probably consists of sediments supplied from the shelf and slope, being constantly reworked by westward flowing bottom currents, which redeposited the sediments into a large scale drift deposit prior to the main glaciogenic input along the margin. High-relief semicircular or elongated depositional structures are also found on the upper continental rise stratigraphically above the regional sediment lens, and were deposited by the combined influence of downslope and alongslope sediment transport. On the lower continental rise, large-scale sediment bodies extend perpendicular to the continental margin and were deposited as a result of downslope turbidity transport and westward flowing bottom currents after initiation of glacigenic input to the slope and rise. We compare the seismostratigraphic signatures along the continental margin segments of the adjacent Riiser Larsen Sea, the Weddell Sea and the Prydz Bay/Cooperation Sea, focussing on indications that may be interpreted as a preglacial-glaciomarine transition in the depositional environment. We suggest that earliest glaciogenic input to the continental slope and rise occurred in the Prydz Bay and possibly in the Weddell Sea. At a later stage, an intensification of the oceanic circulation pattern occurred, resulting in the deposition of the regional plastered drift deposit along the Cosmonaut Sea margin, as well as the initiation of large drift deposits in the Cooperation Sea. At an even later stage, possibly in the middle Miocene, glacial advances across the continental shelf were initiated along the Cosmonaut Sea and the Riiser Larsen Sea continental margins.

KW - Antarctica

KW - Bottom currents

KW - Contourites

KW - Cosmonaut Sea

KW - Glacial advances

KW - Glaciomarine sediments

KW - Prydz Bay

KW - Riiser Larsen Sea

KW - Turbidites

KW - Weddell Sea

UR - http://www.scopus.com/inward/record.url?scp=26844485487&partnerID=8YFLogxK

U2 - 10.1007/s11001-005-1321-4

DO - 10.1007/s11001-005-1321-4

M3 - Article

AN - SCOPUS:26844485487

VL - 25

SP - 247

EP - 263

JO - Marine Geophysical Research

JF - Marine Geophysical Research

SN - 0025-3235

IS - 3-4

ER -

ID: 35965446