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Title

Petrology and geochemistry of Mijan intrusive body in Jebal-e-Barez granitoid complex (south east Jirouft)

Writers

Gorbani m.

Pages

 Start Page 19 | End Page 35

Abstract

 Mijan area is located in northeast of Jiroft in Kerman Province, and it is a part of Jebal-e Barez batholith. The lithologic composition of the intrusive bodies in Mijan area within Jebale_Barez complex varies and consists of alkali granite, alkali syenite, granodiorite and quartz syenite. The magmatic nature of these rocks is sub-alkaline and calc-alkaline, and belongs to potassic calc-alkaline and high potassium series. Study of geochemical data indicates that these rocks have been formed in tectono-magmatic environment within active continental margin. The origin of most of intrusive rocks in Mijan area is continental arc, and these rocks are of pre-collision and syn-collision types. The spider diagrams of regional rocks indicate that they feature magmatic arc characteristics. These rocks have been formed due to oceanic crust Subduction, dehydration and mantle wedge melting. Mijan intrusive rocks have undergone three magmatic phases as the most extended rocks in the area are related to the final phase and the least extended ones belong to the early phase.

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