Classification of Granitoids from the Golpayegan Area on the Basis of the Tectonic Setting
Abstract:
Granitoid masses of the Golpayegan area from structural zones classification are considered within the Sanandaj-Sirjan zone. According to tectonic settings of granitoids various patterns are used for tectonic discrimination of granitoids. Based on geological, lithological and petrological evidences and also major and trace elements chemistry, various discrimination plots are applied. Based on Shan`s index, most studied samples plot within the field of Continental Collision Granitoids (CCG) field. By utilizing the multication diagram of R1-R2, the granitoids samples from north of the Varzaneh and the Saeid-Abad often fall into the syn-collision field and few fall into the late orogenic field. Considering geochemical patterns and trace element-SiO2 plot, these granitoids are mostly syn-collisional granites (syn-COLG) and volcanic Arc Granites (VAG). The relationship between the evolution of the Neo-Tethys and the magmatic events include geochemical studies, fabric elements and radiometric dating of the mylonitic granites in the Golpayegan area will be guide in the studied area. The main objective of this study is to evaluate the tectonic setting of granitoids from north of the Golpayegan, which can help to determine the geodynamic environment of the area and ultimately the Sanandaj-Sirjan Zone. The results indicate that granitoids of the Golpayegan are mostly CCG or syn-COLG types that were formed at the end of orogenic events synchronous with the end of deformations and collision of the Arabian plate with the Iranian plate at the Paleocene.
How to cite this article
M. Sharifi, M. Noghreyan, H. Safaei, I. Noorbehsht and J. Ahmadian, 2007. Classification of Granitoids from the Golpayegan Area on the Basis of the Tectonic Setting. Journal of Applied Sciences, 7: 3420-3430.
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