Pliocene to Quaternary deformation in South East Sayan (Siberia): Initiation of the Tertiary compressive phase in the southern termination of the Baikal Rift System - INSU - Institut national des sciences de l'Univers Accéder directement au contenu
Article Dans Une Revue Journal of Southeast Asian earth sciences Année : 2011

Pliocene to Quaternary deformation in South East Sayan (Siberia): Initiation of the Tertiary compressive phase in the southern termination of the Baikal Rift System

Marc Jolivet
Alain Chauvet

Résumé

The South East Sayan area,Wof the Lake Baikal is subjected to a very complex tectonic setting where the extensional stress field of the Baikal Rift System meets the compressional stress field generated by the India­Asia collision further south. Using satellite images, aerial photographs, SRTM DEM, field mapping of geomorphological structures, and published neotectonics and geological data we show that most of the relief in the SE Sayan initiated during Late Pliocene­Pleistocene through compressive reactivation of inherited structures. By Late Quaternary, clockwise rotation of the compressive field generated strike­slip faulting and local, secondary extension still within a general compressional stress field. We demonstrate that the formation of the small-scale extensional basins within the East Sayan range is not linked to general the extension in the Baikal Rift System nor to a possible asthenospheric plume acting at the base of the crust but rather to the rotation of small rigid tectonic blocks driven by the compression.

Dates et versions

insu-00605062 , version 1 (30-06-2011)

Identifiants

Citer

A. Arzhanikova, S. Arzhanikov, Marc Jolivet, R. Vassallo, Alain Chauvet. Pliocene to Quaternary deformation in South East Sayan (Siberia): Initiation of the Tertiary compressive phase in the southern termination of the Baikal Rift System. Journal of Southeast Asian earth sciences, 2011, 40 (2), pp.581-594. ⟨10.1016/j.jseaes.2010.10.011⟩. ⟨insu-00605062⟩
507 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More