Nouvelles données structurales et datations 40K–40Ar sur les roches métamorphiques de la région de Neyriz (zone de Sanandaj–Sirjan,Iran méridional). Leur intérêt dans le cadre du domaine néo-téthysien du Moyen-Orient |
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Authors: | Reza Sheikholeslami Hervé Bellon Hachem Emami Mossa??eb Sabzehei Alain Piqué |
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Institution: | 1. IUEM, université de Bretagne occidentale, 6, av. Victor-Le-Gorgeu, C.S. 93637, 29238 Brest cedex 3, France;2. Geological Survey of Iran, Tehran, Iran |
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Abstract: | The metamorphic rocks of the Neyriz area (Sanandaj–Sirjan zone) represent a Palaeozoic sequence, the upper part of which being palaeontologically dated from the Carboniferous and the Permian. Field structural analysis of the whole sequence, detailed in laboratory by microstructural one and 40K–40Ar dating carried on separated minerals, lead to establish that the whole sequence, from gneisses to Permian rocks, has suffered a unique synmetamorphic deformation, of variable intensity, marked by a foliation. Isotopic ages measured on extracted amphiboles and micas, clustered in four groups between 300 and 60 Ma, show the successive stages of their slow exhumation, which ended by the end of the Cretaceous. To cite this article: R. Sheikholeslami et al., C. R. Geoscience 335 (2003). |
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Keywords: | Iran zone de Sanandaj–Sirjan métamorphisme phase éo-cimmérienne Iran Sanandaj–Sirjan zone metamorphism Early Cimmerian phase Auteur correspondant |
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