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Paper Information

Journal:   PETROLOGY   WINTER 2016 , Volume 6 , Number 24; Page(s) 171 To 195.
 
Paper: 

THE STUDY OF P-T FORMATION OF KOLAH GHAZI GRANITOID BASED ON MINERALOGICAL RELATIONSHIPS (SOUTHEAST OF ISFAHAN)

 
 
Author(s):  MANSOURI ESFAHANI MAHIN*, KHALILI MAHMOUD, SAFARI MIRGHALEH AFSANEH, KHALILI KHADIJEH, TABATABAEI SEYED HASSAN
 
* DEPARTMENT OF MINING ENGINEERING, ISFAHAN UNIVERSITY OF TECHNOLOGY, ISFAHAN, IRAN
 
Abstract: 

The Kolah Ghazi granitoid body is located in the south-southeast of Isfahan and lies in the Sanandaj-Sirjan zone. The pluton is predominately composed of monzogranite, granodiorite and syenogranite. Quartz, plagioclase, K-feldspar, biotite, tourmaline, cordierite andalusite, sillimanite, kyanite, spinel and garnet are major and minor minerals of the pluton. The presence of kyanite in granodiorite enclaves may be due to melting of the pelitic rocks of the area which gave rise to formation of alumina rich restite. The occurrence of sillimanite these granitoid rocks can be related to metasomatism process. The inclusion of biotite and sillimanite needles in the cordierite indicates that the alteration of these minerals, during congruent melting, is responsible for the origin of cordierite. Further, cordierite crystallized during anatexis conditions under 660-770oC and 3.5 kbar condition. Growth of spinel around the aluminosilicates with symplectites texture represents conditions of high temperature, low content of SiO2, high fO2 in the Fe-enriched meta-argillite. The assemblages of cordierite, sillimanite, biotite and tourmaline with unusual common blue pleochroism in the Kolah Ghazi granitoids indicate the breakdown of tourmaline under temperature higher than 750oC. The origin of the garnet with almandine component in the Kolah Ghazi granitoids is magmatic source and refers to the pressure of 4 to 5 kbar, corresponding to depth of more than 18 km and temperature less than 850oC. As it may be observed from the mineralogical relationship, geochemistry of feldspar and Zr vs. SiO2 the pluton developed under 700-900oC and over 2 kbar PH2O.

 
Keyword(s): P-T, MINERALOGICAL RELATIONSHIPS, ALUMINOSILICATES, KOLAH GHAZI GRANITOID, SANANDAJ-SIRJAN ZONE
 
 
References: 
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+ Click to Cite.
APA: Copy

MANSOURI ESFAHANI, M., & KHALILI, M., & SAFARI MIRGHALEH, A., & KHALILI, K., & TABATABAEI, S. (2016). THE STUDY OF P-T FORMATION OF KOLAH GHAZI GRANITOID BASED ON MINERALOGICAL RELATIONSHIPS (SOUTHEAST OF ISFAHAN). PETROLOGY, 6(24), 171-195. https://www.sid.ir/en/journal/ViewPaper.aspx?id=510260



Vancouver: Copy

MANSOURI ESFAHANI MAHIN, KHALILI MAHMOUD, SAFARI MIRGHALEH AFSANEH, KHALILI KHADIJEH, TABATABAEI SEYED HASSAN. THE STUDY OF P-T FORMATION OF KOLAH GHAZI GRANITOID BASED ON MINERALOGICAL RELATIONSHIPS (SOUTHEAST OF ISFAHAN). PETROLOGY. 2016 [cited 2021July26];6(24):171-195. Available from: https://www.sid.ir/en/journal/ViewPaper.aspx?id=510260



IEEE: Copy

MANSOURI ESFAHANI, M., KHALILI, M., SAFARI MIRGHALEH, A., KHALILI, K., TABATABAEI, S., 2016. THE STUDY OF P-T FORMATION OF KOLAH GHAZI GRANITOID BASED ON MINERALOGICAL RELATIONSHIPS (SOUTHEAST OF ISFAHAN). PETROLOGY, [online] 6(24), pp.171-195. Available: https://www.sid.ir/en/journal/ViewPaper.aspx?id=510260.



 
 
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