Petrology and structural modeling of skarn genesis in the Tange-Hana area (Neyriz, Fars)
Subject Areas :بابک سامانی 1 , Bahman Rahimzadeh 2 , Moradipoor 3
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Keywords: Skarn Ophyolite Tange-Hana, Neyriz Volastonite. ,
Abstract :
Tang-e-Hana region is located in the Snandaj-Sirjan structural zone in the Northwestern of Neyriz in the East of Fars province. The area mainly consists of ultramafic (harzburgite, dunite, wherlite), mafic (gabbro) and marble rocks which are partly metamorphosed to skarn. Contact of ultramafic rocks and Cretaceous limestone unites caused formation of marble and skarn rocks in the study area. The main minerals in skarns are garnet (andradite, grossular), clinopyroxene (diopside, hedenbergite), vesuvianite, scapolite, wollastonite and magnetite. The skarn rocks show different spatial distribution, so that the formation of wollastonite increases and garnet formation decreases from SE to NW of the study area. The existence of wollastonite in the skarns of northern part of Tang-e-Hana is due to high temperature gradient and . According to microprobe analysis and field studies the temperature of the skarn rocks at the time of generation was estimated between 400°-600°C. Also the effective pressure of oxygen was changed between 10-15 to 10-2 atmosphere
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