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Darvishi E, Shahrokhi S. Mineral geochemistry and mineralogy of Masteroon pegmatite (North of Aligudarz - Lorestan Province). www.ijcm.ir 2024; 32 (1) :127-144
URL: http://ijcm.ir/article-1-1848-en.html
URL: http://ijcm.ir/article-1-1848-en.html
1- Department of Geology, Aligudarz Branch, Islamic Azad university, Aligudarz, Iran
2- Department of Geology, Khorramabad Branch, Islamic Azad university, Khorramabad, Iran
2- Department of Geology, Khorramabad Branch, Islamic Azad university, Khorramabad, Iran
Abstract: (1049 Views)
Masteroon area is located in the northeast of Azna city, in the Sanandaj-Sirjan zone. The rocks units include a relatively uniform sequence of slate and phyllite with a granodiorite intrusive mass that includes pegmatitic complex. The most important minerals include quartz, alkaline feldspar, plagioclase, tourmaline and muscovite. Quartz is high pure and does not have any other elements. EPMA shows the albite-type feldspar with a lesser extent than orthose-type with a less than 550⁰C crystallization temperature. This can be due to the result of below the freezing of the feldspars composition during the cooling of the mass. The available tourmalines are of schorl and alkaline type with a deficiency in the X position, and their numerous and abundant presence, automorphism and absence of chemical zoning, indicate that tourmalines are magmatic. Muscovites are present in two forms: coarse-grained in pegmatites and fine-grained in joints and cracks, and the coarse-grains does not stretch to phengite.
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