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Geochemical Evolution and Petrogenesis of the Eocene Kashmar Granitoid Rocks, Ne Iran: Implications For Fractional Crystallization and Crustal Contamination Processes
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نویسنده
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Dabiri Rahim ,Akbari-Mogaddam Mohsen ,Ghaffari Mitra
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منبع
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Iranian Journal Of Earth Sciences - 2018 - دوره : 10 - شماره : 1 - صفحه:68 -77
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چکیده
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Kashmar granitoids of taknar zone, in north part of lut block, intruded into volcanic rocks and consist of granites, granodiorites, monzodiorite and gabbrodiorites. they are composed of mainly plagioclase, alkali-feldspar, quartz, amphibole, biotite and pyroxene minerals. harker diagram variation, including negative correlations cao, mgo, feo, tio2 and v and positive correlations k2o, rb, ba, and th, with increasing sio2 and chondrite-normalized ree patterns, suggest that fractional crystallization of gabbrodioritic rocks could have played a significant role in the formation of granites. their chondrite-normalized ree patterns are characterized by lree enrichment and show slight negative eu anomalies. chondrite-normalized ree modelling indicates that the magma of kashmar gabbrodiorites were generated with 3–5% of partial melting of a a spinel-lherzolite source. melting of parental magma located at ~53 km.
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کلیدواژه
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Petrogenesis ,Geochemical Modeling ,Contamination ,Granitoids ,Taknar Zone
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آدرس
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Islamic Azad University, Mashhad Branch, Department Of Geology, Iran, , Iran, Tarbiat Modares University, Department Of Geology, Iran
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پست الکترونیکی
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m.ghaffari@modares.ac.ir
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Authors
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