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Geosciences -Environnement- Toulouse |  |
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Geosciences -Environnement- Toulouse | |
| HAL: insu-00605062, version 1 |
| DOI: 10.1016/j.jseaes.2010.10.011 |
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| Journal of Asian Earth Sciences 40, 2 (2011) 581-594 |
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| Pliocene to Quaternary deformation in South East Sayan (Siberia): Initiation of the Tertiary compressive phase in the southern termination of the Baikal Rift System |
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| A. Arzhanikova 1S. Arzhanikov 1 |
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| (2011) |
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| 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. |
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| 1: | Institute of the Earth Crust, Irkutsk |
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inconnue |
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| 2: | Géosciences Rennes (GR) |
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CNRS : UMR6118 – INSU – Centre Armoricain de Recherches en Environnement – Université de Rennes 1 |
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| 3: | Laboratoire des Mécanismes et Transfert en Géologie (LMTG) |
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CNRS : UMR5563 – Observatoire Midi-Pyrénées – Université Paul Sabatier [UPS] - Toulouse III – Institut de recherche pour le développement [IRD] : UMR154 |
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| 4: | Institut des sciences de la Terre (ISTerre) |
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CNRS : UMR5275 – IFSTTAR – Université de Savoie – Université Joseph Fourier - Grenoble I – INSU – OSUG – Institut de recherche pour le développement [IRD] : UR219 |
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| 5: | Géosciences Montpellier (GM) |
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CNRS : UMR5243 – Université Montpellier II - Sciences et techniques |
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| Tectonique reliefs et bassins |
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| subject | : | Sciences of the Universe/Earth Sciences/Tectonics Environmental Sciences/Global Changes |
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| Baikal Rift System – Sayan range – Relief building – India-Asia collision – Tectonics |
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| insu-00605062, version 1 | |
| http://hal-insu.archives-ouvertes.fr/insu-00605062 | |
| oai:hal-insu.archives-ouvertes.fr:insu-00605062 | |
| From: Isabelle Dubigeon | |
| Submitted on: Thursday, 30 June 2011 14:43:55 | |
| Updated on: Monday, 26 March 2012 10:26:57 | |
