Comparison between the chemistry of igneous and hydrothermal biotite in the igneous rocks of Sakhtehesar mountain

زمین شناسی اقتصادی

Article 5, Volume 1, Issue 1, January 2010, Pages 117-134   

Document Type: Research Article

DOI: 10.22067/econg.v1i1.3684

Authors

Farimah Ayati^{* 1}; Saeed Mahdevari²

¹Payame Noor

²Isfahan University of Technology

Abstract

Sakhtehesar mountain is located in Urumieh-Dokhtar magmatic belt and is composed of volcanic and subvolcanic rocks (Pliocene andesite to dacite) which intruded the volcanics and pyroclastics of Paleocene age. Three alteration zones including potassic, phyllic and propylitic are recognized in the area. In this paper, the mineral chemistry of magmatic and primary biotite and the mineral chemistry of biotite in potassic and phyllic alteration zones have been studied. Investigations show that primary and secondary biotites are different from each other and hydrothermal fluids associated with the potassic alteration are distinctively different from the fluids associated with the phyllic alteration zone in the area.

Keywords

biotite; hydrothermal; Sakhthesar