PETROGRAPHY, MINERAL CHEMISTRY AND MYLONITIZATION OF GRANITES IN THE KALUT-E-CHAPEDONY (YAZD PROVINCE)

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ZAKIPOUR ZAHRAALSADAT; TORABI GHODRAT

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Journal: GEOCHEMISTRY Year:2015 | Volume:3 | Issue:4 Page(s): 301-313

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Title

PETROGRAPHY, MINERAL CHEMISTRY AND MYLONITIZATION OF GRANITES IN THE KALUT-E-CHAPEDONY (YAZD PROVINCE)

Author(s)

ZAKIPOUR ZAHRAALSADAT | TORABI GHODRAT | Issue Writer Certificate

Keywords

CHAPEDONY METAMORPHIC CORE COMPLEXQ2

S-TYPE GRANITEQ2

EOCENEQ2

MYLONITEQ2

CENTRAL IRANQ2

Abstract

Kalut-e-Chapedony is a part of the EOCENE CHAPEDONY METAMORPHIC CORE COMPLEX, which is located in western part of the Posht-e-Badam block. This complex consists of migmatite, gneiss, amphibolite, marble, micaschist and various types of granitoid. In the northern part of the Kalut-e-Chapedony, a granitic rock unit which evidently presents the mylonitization evidences, crosscuts the other rocks. The main minerals of this granite are plagioclase, orthoclase, quartz, garnet and fibrolitic sillimanite. The accessory minerals are muscovite, zircon, apatite, biotite and spinel. In spite of mylonitization of this granite and formation of fibrolitic sillimanite, the primitive igneous granular and poikilitic textures are preserved. Sillimanite fibrolites are formed at the expense of orthoclase and plagioclase. Chemical analyses of minerals indicate that plagioclases are albite (An9Ab87Or4), garnets show (Alm78Sps12Prp9) composition and orthoclases are as (Or84Ab16). The field evidences (association of this granite with migmatite and other rock units of CHAPEDONY METAMORPHIC CORE COMPLEX), petrography characteristics (high values of orthoclase, presence of garnet and muscovite, as well as formation of fibrolitic sillimanite) and mineral chemistry of garnets (enriched in spessartine) indicate that the magma which produced these granites should be formed by melting of pre-existing sedimentary rocks and presents the S-type characteristics. These granites have suffered the mylonitization in 400oC at subsolidus condition and consequently the fibrolitic sillimanites were formd.

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APA: Copy

ZAKIPOUR, ZAHRAALSADAT, & TORABI, GHODRAT. (2015). PETROGRAPHY, MINERAL CHEMISTRY AND MYLONITIZATION OF GRANITES IN THE KALUT-E-CHAPEDONY (YAZD PROVINCE). GEOCHEMISTRY, 3(4), 301-313. SID. https://sid.ir/paper/230885/en

Vancouver: Copy

ZAKIPOUR ZAHRAALSADAT, TORABI GHODRAT. PETROGRAPHY, MINERAL CHEMISTRY AND MYLONITIZATION OF GRANITES IN THE KALUT-E-CHAPEDONY (YAZD PROVINCE). GEOCHEMISTRY[Internet]. 2015;3(4):301-313. Available from: https://sid.ir/paper/230885/en

IEEE: Copy

ZAHRAALSADAT ZAKIPOUR, and GHODRAT TORABI, “PETROGRAPHY, MINERAL CHEMISTRY AND MYLONITIZATION OF GRANITES IN THE KALUT-E-CHAPEDONY (YAZD PROVINCE),” GEOCHEMISTRY, vol. 3, no. 4, pp. 301–313, 2015, [Online]. Available: https://sid.ir/paper/230885/en

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