Crystal size distribution analysis of plagioclase and pyroxene in basaltic and andesitic rocks of Abbasabad Area, east of Shahrood

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Barzgari leila; GHASEMI HABIBOLLAH; REZAEI KAHKHAEI MEHDI

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2018 | Volume:26 | Issue:1 Page(s): 63-78

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Title

Crystal size distribution analysis of plagioclase and pyroxene in basaltic and andesitic rocks of Abbasabad Area, east of Shahrood

Author(s)

Barzgari leila | GHASEMI HABIBOLLAH | REZAEI KAHKHAEI MEHDI | Issue Writer Certificate

Keywords

Crystal Size Distribution (CSD)Q1

Basaltic-andesitic rocksQ1

AbbasabadQ1

ShahroodQ1

Abstract

The Kahak-Abbasabad Eocene magmatic belt is situated in the northeast edge of Central Iran Zone and extended from Davarzan in the west of Sabzevar to Mayamey in the east of Shahrood. Rock units of the study area include an alternation of basic-intermediate volcanic rocks (olivine basalt, basalt, Trachybasalt, trachyandesitic basalt, trchyandesite and andesite) and pyroclasticsedimentary rocks (varieties of tuffs, breccia, agglomerate, sandstone, shale, conglomerate, nummolitic limestone and tuffuceous limestone), which belong to Upper-Middle Eocene, and sedimentary rocks of Oligocene and Quaternary. The volcanic rocks of this belt form a continuous fractional series, originated from a same parental basaltic magma. Hence, the basaltic-andesitic lava flows are pyroxene porphyry, plagioclase porphyry and pyroxene-plagioclase porphyry; they are favorable for Crystal Size Distribution (CSD) studies. According to calculations of this research, plagioclase and pyroxene phenocrysts of the volcanic rocks have been grown in magmatic chamber in time range of 86. 20 to 118. 01 years with nucleation rates from 1. 48×10-10 to 1. 56×10-10 mms-1and in time range of 3. 21 ×104 to 6. 34×104 years with nucleation rates from 0. 55×10-3 to 2×10-5mms-1, respectively.

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APA: Copy

Barzgari, leila, GHASEMI, HABIBOLLAH, & REZAEI KAHKHAEI, MEHDI. (2018). Crystal size distribution analysis of plagioclase and pyroxene in basaltic and andesitic rocks of Abbasabad Area, east of Shahrood. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 26(1 ), 63-78. SID. https://sid.ir/paper/408814/en

Vancouver: Copy

Barzgari leila, GHASEMI HABIBOLLAH, REZAEI KAHKHAEI MEHDI. Crystal size distribution analysis of plagioclase and pyroxene in basaltic and andesitic rocks of Abbasabad Area, east of Shahrood. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2018;26(1 ):63-78. Available from: https://sid.ir/paper/408814/en

IEEE: Copy

leila Barzgari, HABIBOLLAH GHASEMI, and MEHDI REZAEI KAHKHAEI, “Crystal size distribution analysis of plagioclase and pyroxene in basaltic and andesitic rocks of Abbasabad Area, east of Shahrood,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 26, no. 1 , pp. 63–78, 2018, [Online]. Available: https://sid.ir/paper/408814/en

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