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(Article of periodic en Anglais - 2013)

Document title

Thermokarst processes and depositional events in a tundra lake, northeastern Siberia

Authors(s) and Affiliation(s)

BISKABORN B.K. (1) ; HERZSCHUH U. (1) ; BOLSHIYANOV D.Y. (2) ; SCHWAMBORN G. (1) ; DIEKMANN B. (1) ;
(1) Alfred Wegener Inst. for Polar and Marine Research, Research Unit, Potsdam, ALLEMAGNE
(2) Arctic and Antarctic Research Inst., St. Petersburg, RUSSIE, FEDERATION DE

Abstract

The aim of this paper is to identify the factors controlling the patterns of deposition, using grain size distribution, organic content, elemental composition and mineralogical composition of a 137 cm long sediment core with a maximum age of ~ 10.9 cal. kyr BP from Lake El'gene-Kyuele of northeastern Siberia. Eight fine sand layers are attributed to depositional events associated with thaw slump activity acting upon orthogonally oriented patterns of ice-wedge networks in the ice-rich permafrost on the NW margin of the lake catchment. Sr/Rb ratios, which correspond to the total feldspar and illite content, serve as high-resolution grain size proxies. The Br content relates to the total organic carbon content, and the Fe/Mn ratio reflects the degree of oxidisation. The results indicate a relationship between repeated phases of fine sand input and retrogressive thaw slumping dependent on hydroclimate variability and orthogonally oriented

Source

Article of periodic

published at : Permafrost and periglacial processes / ISSN 1045-6740 / CODEN PEPPED

Editor : Wiley, Chichester - ROYAUME-UNI (1990)

Millesime : 2013, vol. 24, no3 [pp. 160-174]

Bibliographic references : 2 p.

Collation : 9 fig., 2 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1769

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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