Temperature, composition and age of the Kara Sea Shelf sediments in the area of the Marre-Sale Geocryological Station.

Dubrovin, V. A., Kritsuk, L. N. and Polyakova, E. I. (2015) Temperature, composition and age of the Kara Sea Shelf sediments in the area of the Marre-Sale Geocryological Station. Open Access Kriosfera Zemli (Earth Cryosphere), 19 (4). pp. 3-16.

[img]
Preview
Text
Dubrovin.pdf - Published Version

Download (6Mb) | Preview

Abstract

The paper presents results of the study of the uppermost 20 m-thick layer of the near-Yamal shelf bottom
sediments, penetrated in May 2014 by two VSEGINGEO boreholes equipped with LРС loggers, with an aim
of the temperature regime dynamics monitoring in the nearshore bottom sediments, both for the research purposes
and in as much as the data add value to the forthcoming hydrocarbon resource development on the Russian
continental shelf. On the basis of the temperature variation observations during three summer months of 2014,
it has been established that marine silty clays and aleurites composing the bottom sediment section, represent
relict frozen deposits subjected to cryogenic metamorphism in the subaerial exposure environment. Diatom
assemblages occurring in aleurite and clayey deposits consist exclusively of the marine extinct species typical of
the Early Eocene Pyxilla gracilis diatom zone. A modern marine sublittoral diatom assemblage is found inhabiting
the sands of the upper part of the onshore borehole section.

Document Type: Article
Keywords: Shelf, borehole, bottom sediments, monitoring, autonomous measuring complex, temperature regime, diatom assemblages, Marre-Sale Permafrost Station
Refereed: Yes
Open Access Journal?: Yes
ISSN: 1560-7496
Projects: Otto Schmidt Laboratory
Date Deposited: 24 Jan 2017 14:10
Last Modified: 24 Jan 2017 14:12
URI: http://oceanrep.geomar.de/id/eprint/35889

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...