Composition of Late Holocene Deposits of Southern Part of the Chukchi Sea-Reference-Cited by-同舟云学术

Composition of Late Holocene Deposits of Southern Part of the Chukchi Sea

Published:2023-01-01 Issue:1 Volume:63 Page:84-94
ISSN:0030-1574
Container-title:Океанология
language:
Short-container-title:Okeanologiâ

Author:

Vologina E. G.¹,Sturm M.²,Kulagina N. V.¹,Aksentov K. I.³

Affiliation:

1. Institute of the Earth’s Crust, Siberian Branch, Russian Academy of Sciences

2. Swiss Federal Institute of Aquatic Science and Technology

3. Il’ichev Pacific Oceanological Institute, Far East Branch, Russian Academy of Sciences

Abstract

The aim of the study was comprehensive study of Late Holocene bottom sediments from the southern part of the Chukchi Sea and reconstruction of the conditions of their accumulation. Analytical methods included macroscopic description with smear slides inspection, 210Pb dating of the sediments, determination of biogenic components, magnetic susceptibility measurements, grain size distribution, palynological and mineral analyzes. The rate of modern sedimentation established at the study point is 8–10 mm/year. Sediments are mainly represented by silts. In the upper part of the core, there are increased concentrations of SiO2biog, Corg, Ntot and decreased values of magnetic susceptibility. This is probably due to the increased bioproductivity of the Chukchi Sea during last years, caused by the current climate warming. The palynological composition of the studied deposits reflects the tundra and forest-tundra vegetation on land adjacent to the Chukchi Sea. The presence of Neogene pollen in the Late Holocene sediments is evidence of their transfer from eroded ancient sediments.

Publisher

The Russian Academy of Sciences

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