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(Article of periodic en Anglais - 2014)

Document title

Cryogenic deformation structures in Late Cenozoic unconsolidated sediments of the Tunka Depression in the Baikal Rift Zone

Authors(s) and Affiliation(s)

ALEXEEV S. (1) ; ALEXEEVA L. (1) ; KONONOV A. (1) ;
(1) Inst. of the Earth's Crust Russian Academy of Sciences Siberian Branch (IEC SB RAS), Irkutsk, RUSSIE, FEDERATION DE

Abstract

The Late Cenozoic alluvial deposits in the Tunka depression of the Baikal Rift Zone, Russia, contain wedge-shaped structures and involutions that provide valuable palaeogeographic information about the southern part of eastern Siberia. The structure of the unconsolidated host deposits, the shape and size of the deformation structures (wedge shaped, wave like or drop like) and the physical-mechanical properties of the sediments (particle size, density, porosity, water content and colour) point to a cryogenic origin of the deformation structures, as ice wedge pseudomorphs and cryoturbations, rather than an origin associated with seismic activity or sedimentation. The oldest pseudomorphs and cryoturbations developed during climate-warming periods of the subboreal climatic phase (3600-2600 years ago)

Source

Article of periodic

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

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

Millesime : 2014, vol. 25, no2 [pp. 117-126]

Bibliographic references : 1 p.

Collation : 8 fig., 1 tabl.

Language

Anglais

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/ppp.1809

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2014
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