DETERMINING MAGMATIC SERIES AND OXYGEN FUGACITY OF VOLCANIC ROCKS IN THE EAST OF KAMU, NORTH OF ISFAHAN, BASED ON BIOTITE CHEMISTRY

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SAYARI MOHAMMAD; SHARIFI MORTEZA; AHMADIAN JAMSHID

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Journal: JOURNAL OF ECONOMIC GEOLOGY Year:2014 | Volume:6 | Issue:1 Page(s): 149-161

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Title

DETERMINING MAGMATIC SERIES AND OXYGEN FUGACITY OF VOLCANIC ROCKS IN THE EAST OF KAMU, NORTH OF ISFAHAN, BASED ON BIOTITE CHEMISTRY

Author(s)

SAYARI MOHAMMAD | SHARIFI MORTEZA | AHMADIAN JAMSHID | Issue Writer Certificate

Keywords

BIOTITEQ2

OXYGEN FUGACITYQ1

VOLCANIC ROCKSQ2

URUMIEH-DOKHTARQ2

KAMUQ1

Abstract

Volcanic rocks of interest are situated in the middle part of the URUMIEH-DOKHTAR Magmatic Arc (UDMA). They are parts of a vast magmatic province located in the north of Bitlis-Zagros suture zone. Having a prevailing porphyritic texture, these rocks include phenocrysts of plagioclase, amphibole and BIOTITE in a matrix composed of feldspar, quartz, opaque, glass and microlite and mineralogically show composition of dacite to andesite. Minerals are mostly fresh. Effects of alteration are limited to weak chloritization and saussuritization in some amphiboles and rim of plagioclases, respectively.All of the analyzed BIOTITEs in the Miocene-Pliocene VOLCANIC ROCKS in the east of KAMU are of Mg-BIOTITE. According to a widespread classification of micas to 6 general end-members, BIOTITEs of interest are averagely composed of 55.45% phlogopite, 15.90% talc, 12.72% Ti-phlogopite, 11.44% eastonite, 3.71% ferri-eastonite and 0.78% muscovite. Chemical composition of BIOTITEs indicates a calk-alkaline magmatic series for the magma from which BIOTITEs are crystallized. Estimation of the OXYGEN FUGACITY of magma, based on chemical composition and Fe3+ content of BIOTITE, shows that the OXYGEN FUGACITY was limited to FMQ buffer in quality and was about 10-15 bar in quantity. This value accords the OXYGEN FUGACITY for intermediate-acidic VOLCANIC ROCKS.

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APA: Copy

SAYARI, MOHAMMAD, SHARIFI, MORTEZA, & AHMADIAN, JAMSHID. (2014). DETERMINING MAGMATIC SERIES AND OXYGEN FUGACITY OF VOLCANIC ROCKS IN THE EAST OF KAMU, NORTH OF ISFAHAN, BASED ON BIOTITE CHEMISTRY. JOURNAL OF ECONOMIC GEOLOGY, 6(1), 149-161. SID. https://sid.ir/paper/180506/en

Vancouver: Copy

SAYARI MOHAMMAD, SHARIFI MORTEZA, AHMADIAN JAMSHID. DETERMINING MAGMATIC SERIES AND OXYGEN FUGACITY OF VOLCANIC ROCKS IN THE EAST OF KAMU, NORTH OF ISFAHAN, BASED ON BIOTITE CHEMISTRY. JOURNAL OF ECONOMIC GEOLOGY[Internet]. 2014;6(1):149-161. Available from: https://sid.ir/paper/180506/en

IEEE: Copy

MOHAMMAD SAYARI, MORTEZA SHARIFI, and JAMSHID AHMADIAN, “DETERMINING MAGMATIC SERIES AND OXYGEN FUGACITY OF VOLCANIC ROCKS IN THE EAST OF KAMU, NORTH OF ISFAHAN, BASED ON BIOTITE CHEMISTRY,” JOURNAL OF ECONOMIC GEOLOGY, vol. 6, no. 1, pp. 149–161, 2014, [Online]. Available: https://sid.ir/paper/180506/en

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