Radiocarbon age and sedimentation rates of bottom sediments in the Obskaya Gube (Ob River estuary

Complex geological-geochemical studies of water column and bottom sediments were carried out during Cruise 49 of R/V "Dmitry Mendeleev" in the Kara Sea shelf zone along the Obskaya Guba (Ob River estuary) from the Pur River and Taz River mouths to 76°N. Carbon-14 concentrations in organic matter from bottom sediments were determined at 5 stations. Constant initial 14C concentration model was used to determine sedimentation rates that were taken as a basis for calculating ages of sediment cores and their separate parts and for inferring location of a depocenter, i.e. a region of maximal discharge of fine-dispersed fraction of suspended matter of river run-off. Sedimentation rate in the depocenter is 170 cm/ka. Southward moves of the depocenter were recorded for periods of sea-level rises 2 and 5 thousand years ago. Bottom sediments in the depocenter contain 45% of organic matter primary produced in the Obskaya Guba. This organic matter is an energetic basis for bottom fauna life. About 55% of organic matter comes with river run-off.

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Cite this as

Kuptsov, Vladimir M, Lisitzin, Alexander P (2003). Dataset: Radiocarbon age and sedimentation rates of bottom sediments in the Obskaya Gube (Ob River estuary. https://doi.org/10.1594/PANGAEA.761919

DOI retrieved: 2003

Additional Info

Field Value
Imported on November 30, 2024
Last update November 30, 2024
License CC-BY-3.0
Source https://doi.org/10.1594/PANGAEA.761919
Author Kuptsov, Vladimir M
Given Name Vladimir M
Family Name Kuptsov
More Authors
Lisitzin, Alexander P
Source Creation 2003
Publication Year 2003
Resource Type application/zip - filename: Kuptsov-Lisitzin-2003
Subject Areas
Name: Oceans

Related Identifiers
Title: Holocene sedimentation in the Ob Guba (Bay) and the adjacent shelf zone
Type: DOI
Relation: IsSupplementTo
Year: 2003
Source: Translated from Oceanology, 2003, 43(2), 254-261
Authors: Kuptsov Vladimir M , Lisitzin Alexander P .