Age determination and sedimentation rates of sediment cores in the Laptev Sea

DOI

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, delta13Corg, sedimentation rates) controlled by radiocarbon age models the palaeoenvironment of a strongly coupled river-shelf system was reconstructed since ~11 ka BP. 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 ~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 delta13Corg; (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 ~2 ka BP.

For the age determination of sediment core PS2725-5 see Fahl and Stein (1999) dataset: doi:10.1594/PANGAEA.85168

Supplement to: Bauch, Henning A; Kassens, Heidemarie; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Thiede, Jörn (1999): Depositional environment of the Laptev Sea (Arctic Siberia) during the Holocene. Boreas, 28(1), 194-204

Identifier
DOI https://doi.org/10.1594/PANGAEA.711773
Related Identifier https://doi.org/10.1111/j.1502-3885.1999.tb00214.x
Metadata Access https://ws.pangaea.de/oai/provider?verb=GetRecord&metadataPrefix=datacite4&identifier=oai:pangaea.de:doi:10.1594/PANGAEA.711773
Provenance
Creator Bauch, Henning A; Kassens, Heidemarie; Erlenkeuser, Helmut ORCID logo; Grootes, Pieter Meiert ORCID logo; Thiede, Jörn ORCID logo
Publisher PANGAEA
Publication Year 1999
Funding Reference Fourth Framework Programme https://doi.org/10.13039/100011105 Crossref Funder ID MAS3980185 https://cordis.europa.eu/project/id/MAS3980185 Quaternary Environment of the Eurasian North
Rights Creative Commons Attribution 3.0 Unported; https://creativecommons.org/licenses/by/3.0/
OpenAccess true
Representation
Language English
Resource Type Supplementary Publication Series of Datasets; Collection
Format application/zip
Size 7 datasets
Discipline Earth System Research
Spatial Coverage (115.545W, 75.501S, 144.135E, 78.656N); Laptev Sea; Arctic Ocean
Temporal Coverage Begin 1994-09-24T00:00:00Z
Temporal Coverage End 1995-10-08T00:00:00Z