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Paper Information

Journal:   JOURNAL OF SCIENCE (UNIVERSITY OF TEHRAN) (JSUT)   SPRING 2007 , Volume 33 , Number 1 (SECTION: GEOLOGY); Page(s) 1 To 14.
 
Paper: 

PETROLOGY AND GEOCHEMISTRY OF THE GRANITOID MASSIF OF BOROUJERD

 
 
Author(s):  AHMADI KHALAJI A., VALIZADEH M.V.*, ESMAEILI DARYOUSH
 
* SCHOOL OF GEOLOGY, UNIVERSITY COLLEGE OF SCIENCE, UNIVERSITY OF TEHRAN, TEHRAN, IRAN
 
Abstract: 

The Boroujerd granitoid massif is as a small portion of Sanandaj-Sirjanzone. It is elongated and parallel the prevailing schistose it in the metamorphic rocks by the trend of NW-SE and consist of quartz diorites, granodiorites, monzogranites and sphene granite. Granodiorites are the most dominant rocks. Petrological, mineralogical, field and geochemical investigations suggest that the Boroujerd granitoid is similarto those of the high-K calc-alkaline series, metaluminousto weakly peraluminous, and displays features typical of I-type granites. Low Al2O3/(FeO+MgO + TiO2) and (Na2O + K2O) / (FeO+ MgO + TiO2) ratios, and the trace and rareearth elements patterns suggest that these rocks formed along a destructive plate margin and were derived from a lower crustal source. This granitoid magma involves partial melting of lower crustal protoliths and frac-tional crystallization of the melts in higher crustal levels can generate the whole spectrum of rock types represent in the Boroujerd massif. Mantle-derived basaltic magmas emplaced into the lower crust are the most likely heat sources for partial melting.

 
Keyword(s): PETROLOGY, GEOCHEMISTRY, BOROUJERD, I-TYPE GRANITOID, CRUSTAL SOURCE, SANNDAJ-SIRJAN ZONE, CALC-ALKALINE
 
References: 
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