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Petrographic and chemical investigation of plagioclase, alkali feldspar, pyroxene and olivine minerals in gabbroic rocks of Robat – Shahr Babak region located in Kerman province, Iran
Sheida Akmali *1 , Abbas Moradian1 , Hamid Ahmadipour1 , Massimo Tiepolo2
1- Shahid Bahonar University, Kerman, Iran
2- Universita Degli Studi Di Milano, Italy
Abstract:   (165 Views)
The studied area is located in the southeast of Sanandaj-Sirjan zone, 31 km southwest of Shahr-Babak city and in the north of granodiorite batholith of Shahr-Babak city. In this area, isolated masses of gabbro outcrop, which caused the evolution of the southeastern part of the Sanandaj-Sirjan zone 173 million years ago. Examples of this area include dunite, olivine gabbro, hornblende gabbro, troctolite and granodiorite. In these samples, there are anorthosite streaks, which are the result of fractionation process (especially volatile materials), injection of new magmas and flow. In the investigations obtained from mineral chemistry, plagioclases have a composition of andesine to labradorite and alkaline feldspars have a composition of orthoclase. Pyroxenes are in the range of clinopyroxene (diopside) and olivines are in the range of chrysolite.


 
Keywords: Gabbro, Chemistry of minerals, Sanandaj-Sirjan, Robat, Shahr-Babak, Kerman.
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Type of Study: Research | Subject: Special
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