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(Article of periodic en Anglais - 2012)

Document title

Quartz weathering in freeze-thaw cycles : experiment and application to the El'Gygytgyn crater lake record for tracing Siberian permafrost history

Authors(s) and Affiliation(s)

SCHWAMBORN G. (1) ; SCHIRRMEISTER L. (1) ; FRÜTSCH F. (2) ; DIEKMANN B. (1) ;
(1) Alfred Wegener Inst. for Polar and Marine Research, Research Unit, Potsdam, ALLEMAGNE
(2) Inst. für Geologische Wissenschaften, Freie Univ., Berlin, ALLEMAGNE

Abstract

The aim of this study is to test the assumption that cryogenic weathering (here understood as in-situ disintegration of rock under cold-climate conditions including ice as a weathering agent) preferentially breaks up quartz grains. The AA. apply the results of laboratory tests to a Quaternary sediment record. The combination of silt production, relative quartz enrichment in the silt fraction, and quartz grain micromorphology is traced in a multi-100-kyr lake sediment archive as indicator data for cryogenic weathering. Constant cryogenic weathering conditions are inferred for at least the last 220 000 years from a lake sediment core of El'gygytgyn Crater, northeast Russia.

Source

Article of periodic

published at : Geografiska annaler. Series A. Physical geography / ISSN 0435-3676 / CODEN GAPGAP

Editor : Svenska sällskapet för antropologi och geografi, Stockholm - SUEDE (1965)

Millesime : 2012, vol. 94, no4 [pp. 481-499]

Bibliographic references : 3 p.

Collation : 12 fig., 2 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 2704 A

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1111/j.1468-0459.2012.00472.x

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