Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

The study of Kolah-Ghazi granitoid and the effect of contact metamorphism

Authors
Geology Department, Esfahan University, Esfahan, Iran
Abstract
The Kolah- Ghazi intrusive body is located about 50 Km south and south east of Esfahan within the Sanandaj- Sirjan structural zone. This granitoid body composed mainly of granodiorite, monzogranite and syenogranite. Geochemical and petrological diagrams show the consanguinity between different rocks of this intrusive body, calc-alkaline type of magma, and peraluminous nature of these rocks.
     Important characteristics such as coarse aluminosilicate minerals (andalusite, sillimanite and Kyanite), peraluminous nature of body, surmicaceous enclaves and existence of more than 1% normative corundum suggests the S-Type origin of this intrusive body.
     Geochemical diagrams and regional evidences support the (POG) tectonic environment of these rocks. Contact metamorphism effect of this body with Upper- Jurassic shales and sandstones results in the formation of spotted schists with spots of biotite.
    On the basis of the petrographical, stratigraphical and field evidences, the emplacement age of this body is upper- Jurassic.
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Volume 5, 17-18
Autumn & Winter 1996, Vol. 5, No. 17-18
Winter 1996
Pages 60-79