Research Article

Petrography and Mineral Chemistry of the Boroujerd Pluton (Sanandaj-Sirjan Zone, Western Iran)

A. Ahmadi Khalaji, Z. Tahmasbi and R. Zarei Sahamieh

The Boroujerd pluton is chiefly constituted of quartz-diorite, granodiorite and monzogranite. The mineral chemistry and microprobe analysis of mineral assemblages in these rocks indicate that the magma in this area has a metaluminous to slightly peraluminous composition, related to calc-alkaline, arc-type magmas and displays features typical of I-type granitoids. Also, the average pressure and temperature is estimated at 1.093 ± 0.6 k bars and 785 ± 40 in quartz-diorites, respectively. All analyzed samples have log FO₂-14.1 which show this magma crystallized in high oxygen fugacity. Also, the occurrence of magnesio-hornblende and Fe²⁺biotite in Boroujerd rocks suggest relatively oxidized magma.

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A. Ahmadi Khalaji, Z. Tahmasbi and R. Zarei Sahamieh, 2009. Petrography and Mineral Chemistry of the Boroujerd Pluton (Sanandaj-Sirjan Zone, Western Iran). Journal of Applied Sciences, 9: 843-853.

DOI: 10.3923/jas.2009.843.853

URL: https://scialert.net/abstract/?doi=jas.2009.843.853

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Authors

A. Ahmadi Khalaji

Z. Tahmasbi

R. Zarei Sahamieh

Keywords

Research Article

Petrography and Mineral Chemistry of the Boroujerd Pluton (Sanandaj-Sirjan Zone, Western Iran)

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