Depositional environment of the Laptev Sea (Arctic Siberia) during the Holocene

Bauch, Henning A., Kassens, Heidemarie, Erlenkeuser, Helmut, Grootes, Pieter M. and Thiede, Jörn (1999) Depositional environment of the Laptev Sea (Arctic Siberia) during the Holocene Boreas, 28 (1). pp. 194-204. DOI 10.1111/j.1502-3885.1999.tb00214.x.

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The holocene depositional setting of the Laptev Sea was studied using three marine sediment cores from water depths between 77 and 46 m. Based on sedimentary parameters (TOC content, delta(13)C(org) Sedimentation rates) controlled by radiocarbon age models the palaeoenvironment of a strongly coupled river-shelf system was reconstructed since similar to 11 ka SP. Caused by a transgressing sea after the last glaciation, all cores reveal progressive decreases in sedimentation rates. Using the sedimentary records of a core from the Khatanga-Anabar river channel in the western Laptev Sea, several phases of change are recognized: (1) an early period lasted until similar to 10 ka BP characterized by an increased deposition of plant debris due to shelf erosion and fluvial runoff; (2) a transitional phase with consistently increasing marine conditions until 6 ka BP, which was marked at its beginning near 10 ka BP by the first occurrence of marine bivalves, high TOC content and an increase in delta(13)C(org); (3) a time of extremely slow deposition of sediments, commencing at,6 ka BP and interpreted as Holocene sea-level highstand, which caused a southward retreat of the depositional centres within the now submerged river channels on the shelf; (4) a final phase with the establishment of modern conditions after similar to 2 ka BP.

Document Type: Article
Additional Information: WOS:000079855300013
Keywords: Northern Barents Sea; Skagerak; Circulation; PB-210; Lena River; Core; Ice
Research affiliation: AWI
OceanRep > GEOMAR > FB1 Ocean Circulation and Climate Dynamics > FB1-P-OZ Paleo-Oceanography
Kiel University
Refereed: Yes
DOI etc.: 10.1111/j.1502-3885.1999.tb00214.x
ISSN: 0300-9483
Date Deposited: 13 Jan 2015 11:21
Last Modified: 06 Sep 2016 12:51

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