Sedimentology, organic geochemistry, and stable isotopes of core PS2138-1, supplement to: Knies, Jochen; Stein, Ruediger (1998): New aspects of organic carbon deposition and its paeoceanographic implications along the northern Barents Sea margin during the last 30,000 years. Paleoceanography, 13(4), 384-394
We studied variations in terrigenous (TOM) and marine organic matter (MOM) input in a sediment core on the northern Barents Sea margin over the last 30 ka. Using a multiproxy approach, we reconstructed processes controlling organic carbon deposition and investigated their paleoceanographic significa...
Main Authors: | , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
1998
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Subjects: | |
Online Access: | https://dx.doi.org/10.1594/pangaea.728671 https://doi.pangaea.de/10.1594/PANGAEA.728671 |
Summary: | We studied variations in terrigenous (TOM) and marine organic matter (MOM) input in a sediment core on the northern Barents Sea margin over the last 30 ka. Using a multiproxy approach, we reconstructed processes controlling organic carbon deposition and investigated their paleoceanographic significance in the North Atlantic-Arctic Gateways. Variations in paleo-surface-water productivity are not documented in amount and composition of organic carbon. The highest level of MOM was deposited during 25-23 ka as a result of scavenging on fine-grained, reworked, and TOM-rich material released by the retreating Svalbard/Barents Sea ice sheet during the late Weichselian. A second peak of MOM is preserved because of sorptive protection by detrital and terrigenous organic matter, higher surface-water productivity due to permanent intrusion of Atlantic water, and high suspension load release by melting sea ice during 15.9-11.2 ka. |
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