Sedimentology, organic geochemistry, and stable isotopes of core PS2138-1 ...

• Main Authors: Knies, Jochen, Stein, Ruediger
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 1998
• Subjects: GLAMAP; Gravity corer Kiel type; Giant box corer; ARK-VIII/2; Polarstern; Paleoenvironmental Reconstructions from Marine Sediments @ AWI AWI_Paleo; Quaternary Environment of the Eurasian North QUEEN; Silicon Cycling in the World Ocean SINOPS; Atlantic Arctic; Atlantic-Arctic; Barents Sea; Ice Sheet; North Atlantic; Sea ice; Svalbard; Svalbard-Barents Sea Ice sheet
• Online Access: https://dx.doi.org/10.1594/pangaea.728671; https://doi.pangaea.de/10.1594/PANGAEA.728671

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. ... : 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 ...