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(Article of periodic en Anglais - 2010)

Document title

Impact of climate and related weathering processes on the authgenesis of clay minerals : exemples from circum-Baikal region, Siberia

Authors(s) and Affiliation(s)

VOGT T. (1) ; CLAUER N. (1) ; LARQUÉ P. (1) ;
(1) Lab. d'Hydrogéologie et Géochimie (CNRS-UdS), Univ., Strasbourg, FRANCE

Abstract

The study region known as Pre-Olkhon lies between the Prebaikalski and the Primosky ridges. A mineralogical study of the clay fraction extracted from various circum-Baikal Tertiary and Pleistocene weathering profiles and deposits confirms that: (1) chlorite and illite, which represent the initial minerals, are most sensitive to cryogenic weathering and were largely destroyed in the alluvial and colluvial deposits, (2) smectite formed under periglacial conditions, and (3) kaolinite, which is the reference clay mineral for the Palaeogene, formed in a warm and wet tropical climate, is still present without alteration features. The described smectite authigenesis confirms that geochemical processes are significant in cryogenic environments, suggesting that smectite of some present-day soils and continental deposits of temperate regions could be inherited, as it might have precipitated under periglacial conditions

Source

Article of periodic

published at : Catena / ISSN 0341-8162

Editor : Catena, Cremlingen-Destedt - ALLEMAGNE (1973)

Millesime : 2010, vol. 80, no1 [pp. 53-64]

Bibliographic references : 1 p.

Collation : 8 fig., 1 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 16767

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1016/j.catena.2009.08.008

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2010
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