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Article Dans Une Revue Tectonics Année : 2009

New tectonic configuration in NE Iran: Active strike-slip faulting between the Kopeh Dagh and Binalud mountains

Résumé

In this paper, a combined approach of geomorphic analyses, detailed geological mapping on SPOT 5 satellite images and field surveys, complemented by radiometric dating (Ar-40/Ar-39) allows proposing a new and consistent tectonic configuration for the northeastern Arabia-Eurasia collision zone. It favors a simple strike-slip faulting mechanism in NE Iran accommodating the northward motion of central Iran with respect to Eurasia between the Binalud and Kopeh Dagh mountains. Our results demonstrate that similar to 2 mm/a (similar to 25%) of this northward motion has been transferred from the Binalud to the Kopeh Dagh through the Meshkan Transfer Zone since similar to 5 Ma. The modern state of stress deduced from fault kinematics analyses shows N30 degrees E trending maximum stress axis and confirms a dominant strike-slip faulting mechanism. Combining our geological data with other available data, we conclude that kinematics of deformation can be appropriately described by rigid block faulting in NE Iran; instead, the continuous deformation as it has been thought during the last 3 decades.
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hal-00420909 , version 1 (30-04-2021)

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Esmaeil Shabanian, Olivier Bellier, Lionel Siame, Nicolas Arnaud, Mohammad R. Abbassi, et al.. New tectonic configuration in NE Iran: Active strike-slip faulting between the Kopeh Dagh and Binalud mountains. Tectonics, 2009, 28, pp.TC5002. ⟨10.1029/2008TC002444⟩. ⟨hal-00420909⟩
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