University of Isfahan Petrological Journal 2228-5210 8 30 2017 08 23 Mineral chemistry, Thermo-barometry and Crystal Size Distribution of volcanic rocks from Shirinak: Implication for genesis of volcanic rocks in the southeast of Urumieh-Dokhtar (Kerman province) Mineral chemistry, Thermo-barometry and Crystal Size Distribution of volcanic rocks from Shirinak: Implication for genesis of volcanic rocks in the southeast of Urumieh-Dokhtar (Kerman province) 181 198 21957 10.22108/ijp.2017.81965 FA Fatemeh Sepidbar Department of Geology, Faculty of Sciences, University of Tehran, Tehran Mohsen Naderi Department of Geology, Faculty of Sciences, Shahid Bahonar University of Kerman, Kerman, Iran Davood Raisi Department of Geology, Faculty of Sciences, University of Tehran, Tehran Journal Article 2015 11 16 The Shirinak volcanic rocks, known as Dahaj-Sarduieh belt in Kerman province, are exposed southeast of Urumieh-Dokhtar volcanic belt. Petrographically, the volcanic rocks are basalts and andesite, which consist mainly of plagioclase, clinopyroxene, olivine as well as calcite, quartz and chlorite as the secondary minerals.  All of these minerals set in fine grain matrix with porphyric and glomeroporphyric textures. Based on mineral chemistry data, plagioclases range from labradorite to bytownite and have been undergone compositional and thermal mixing. They mostly show sieve texture.  CSD (crystal size distribution) study shows that the shape of plagioclase microlites is tablet with aspect ratio of 1:7:10 for short:intermediate:long axes, respectively. Moreover, three-dimensional shape of plagioclase crystals, nucleation and growth time were estimated 40.27 years, which is completely consistent with the nature of basalt. Based on dip of CSD diagram, magma mixing process has been clearly involved in the magma genesis. The pyroxenes studied are augite in composition that were physically crystalized in moderate to high pressure and temperature of 550-1110 ̊ C. They crystallized from a magma likely with about 10% fluid and in variable <em>f</em>O₂condition. On the base of pyroxene chemistry, the basic rocks from Shirinak belong to tholeiitic to calcalkaline series in volcanic arc setting (Neo-Tethys subduction). The Shirinak volcanic rocks, known as Dahaj-Sarduieh belt in Kerman province, are exposed southeast of Urumieh-Dokhtar volcanic belt. Petrographically, the volcanic rocks are basalts and andesite, which consist mainly of plagioclase, clinopyroxene, olivine as well as calcite, quartz and chlorite as the secondary minerals.  All of these minerals set in fine grain matrix with porphyric and glomeroporphyric textures. Based on mineral chemistry data, plagioclases range from labradorite to bytownite and have been undergone compositional and thermal mixing. They mostly show sieve texture.  CSD (crystal size distribution) study shows that the shape of plagioclase microlites is tablet with aspect ratio of 1:7:10 for short:intermediate:long axes, respectively. Moreover, three-dimensional shape of plagioclase crystals, nucleation and growth time were estimated 40.27 years, which is completely consistent with the nature of basalt. Based on dip of CSD diagram, magma mixing process has been clearly involved in the magma genesis. The pyroxenes studied are augite in composition that were physically crystalized in moderate to high pressure and temperature of 550-1110 ̊ C. They crystallized from a magma likely with about 10% fluid and in variable <em>f</em>O₂condition. On the base of pyroxene chemistry, the basic rocks from Shirinak belong to tholeiitic to calcalkaline series in volcanic arc setting (Neo-Tethys subduction). https://ijp.ui.ac.ir/article_21957_eda1bd7891bc6ab08eccf07e8a56fd26.pdf