Petrology and geochemistry of greenstones in Tiran area, West of Isfahan, Central Iran

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Research Paper 01/12/2014
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Petrology and geochemistry of greenstones in Tiran area, West of Isfahan, Central Iran

Zahra Nasr-Esfahani, Ali-Khan Nasr-Esfahani, Zahra Hossein Mirzaee
J. Bio. Env. Sci.5( 6), 407-415, December 2014.
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Abstract

The studied area is located in west of Isfahan province. This area is the part of Sanandaj-Sirjan structural Zone in Central Iran. This area, contain of greenschist and greenstone rocks. These rocks have metmorphed in greenschist facies and belong to the age of Triassic-Jurassic. The Greenstone is mainly composed of plagioclase, amphibole, epidote and chlorite. Geochemical data shows that parent rocks are basalt to andesitic basalt composition with sub alkaline and tholeiitic trend. These results indicated that greenstone generated volcanic environment. Greenstone in Sahrekord-Dehsard terrene shows remnants of Neo-Tethyan oceanic lithosphere with back arc basin environment that was subducted and uplifted to the surface.

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