TITLE:
Chemistry of Minerals and Geothermobarometry of Volcanic Rocks in the Region Located in Southeast of Bam, Kerman Province
AUTHORS:
Abdollah Yazdi, Afshin Ashja-Ardalan, Mohammad-Hashem Emami, Rahim Dabiri, Mohammad Foudazi
KEYWORDS:
Plagioclase, Pyroxene, Geochemistry, Thermo-Barometry, Volcanic Rocks, Bam
JOURNAL NAME:
Open Journal of Geology,
Vol.7 No.11,
November
27,
2017
ABSTRACT: In this paper, tectonic and geothermobarometric environments have been studied with respect to the combination of pyroxene, olivine and plagioclase in volcanic rocks in the southeast of Bam. The combination of volcanic rocks in the region consists of olivine basalt, basalt, alkaline basalt, andesite, trachyandesite and pyroxene andesite. This combination is the result of the processes of crystallization and sometimes contamination. Plagioclase, clinopyroxene, olivine, and amphibole constitute the major minerals (rock forming minerals) in these rocks. Porphyritic to mega-porphyritic textures with microlithic, glumero-porphyritic and amigdaluidal matrix are observed. Based on the thermometric calculations, plagioclase, pyroxene, and olivine minerals and the rocks of this region are crystallized at a pressure of 1.5 to 7 kb and temperatures ranging from about 700°C to 1250°C.