Reza Zarei Sahamieh

Lorestan University

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Ahmad Ahmadi Khalaji

Lorestan University

Ali Moradpour

Soil Conservation and Watershed Management Research

Hassan Zamanian

Lorestan University

Amin Jamshidi

Lorestan University

Zahra Tahmasbi

Shiraz University of Medical Sciences

Nahid Gharib Naseri

Shahid Beheshti University of Medical Sciences

Hasan Zamanian

Lorestan University

Anderson Costa dos Santos

Universidade do Estado do Rio de Janeiro

Manuchehr Amiri

Lorestan University

Yasin Abdi

Lorestan University

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Lorestan University

Tarbiat Modares University

Kharazmi University

University of Tehran

Shahid Beheshti University of Medical Sciences

Bu-Ali Sina University

Carleton University

University of Ottawa

Universidade do Estado do Rio de Janeiro

University of Aveiro

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PETROLOGY AND GEOCHEMISTRY OF INTRUSIVE BODIES IN SW YAZD- IRAN

Reza Zarei Sahamieh Amini Sadr Aldin

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Prediction of strength parameters of sedimentary rocks using artificial neural networks and regression analysis

Arabian Journal of Geosciences (2018)

Yasin Abdi Amin Taheri‐Garavand Reza Zarei Sahamieh

Marl

10.1007/s12517-018-3929-0

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Citations (53)

Geothermobarometry of Quartz Crystals in the Intrusive bodies of Almogholagh Batholith, (Hamedan)

Iranian Journal of Crystallography and Mineralogy (2017)

manoshehr Amiri Ahmad Ahmadi Khalaji Zahra TahmasbiReza Zarei Sahamieh Hasan Zamanian

Batholith

Geothermobarometry

10.18869/acadpub.ijcm.25.3.513

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Citations (1)

Geochemical characteristics of potassic alkaline magmatism of the northeastern Qazvin (Pargeh area)

Iranian Journal of Crystallography and Mineralogy (2024)

Nahid Gharib Naseri Reza Zarei Sahamieh Matthew I. Leybourne Anderson Costa dos Santos Ahmad Ahmadi Khalaji

10.61186/ijcm.32.1.61

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Petrology and Mineral Chemistry of Gabbroic Rocks (Ne Qazvin) and Relationship to Surrounding Monzogabbros

Nahid Gharib Naseri Reza Zarei Sahamieh Matthew I. Leybourne Anderson Costa dos Santos Ahmad Ahmadi Khalaji

The Pargeh gabbroic rocks were emplaced in the Cenozoic and probably Late Eocene in Central Alborz, Iran. The pluton is composed of silica under-saturated rocks including olivine gabbro and monzogabbro. In this area, the ultramafic cumulate olivine gabbro is surrounded by monzo gabbroic rocks. The main rock-forming minerals are moderately magnesium olivine (Fo 56-63), clinopyroxene (Mg# = 53-74), plagioclase (An 30-88), and magnesium biotite (Mg # = 53-63) with accessory magnetite and ilmenite. The crystallization order for these rocks is olivine, clinopyroxene, plagioclase, and biotite. Based on lithological and geochemical observations, fractional crystallization of ascending magma was an important process in the evolution of these rocks. The mineral chemistry as well as the major and trace element geochemistry shows that the Pargeh gabbroic magma was alkaline in nature, characterized by enrichment in large ion lithophile elements (LILE) and depletion of high field strength elements (HFSE); these patterns have characteristics of subduction-related arc (slightly negative Nb-Ta anomalies) and intraplate alkaline magmatic rocks (enrichment in Sr, Ba, U and Pb). The most likely tectonic setting was a back-arc basin. The pyroxene thermobarometer gives the crystallization temperature of 1100-1250 °C and a pressure of 2-5 kbar, which indicates the emplacement of mantle-derived magmas into upper crustal depths. Initial 87Sr/86Sr vales and εNd(t) range from 0.7049 to 0.7053 and 1.5 to 1.9, respectively. The 143Nd/144Nd(i) values for the Pargeh rocks range from 0.51269 to 0.51271. The geochemical and isotopic evidence indicates that these rocks were generated from a mantle-derived magma modified by fractional crystallization. There is little evidence in the trace element and isotopic compositions for crustal assimilation.

10.2139/ssrn.4366631

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Geochemistry and physico-chemical conditions of formation of Varcheh Gabbroic Pluton (Markazie Province)

Iranian Journal of Crystallography and Mineralogy (2018)

Azar Mohamad Bagheri Reza Zarei Sahamieh Ahmad Ahmadi Khalaji Farhad Zall

Geochemistry and physico-chemical conditions of formation of Varcheh Gabbroic Pluton (Markazie Province)

10.29252/ijcm.26.1.47

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Mineral chemistry and thermobarometry of Eocene alkaline volcanic rocks in SW Germi, NW Iran

Iranian journal of earth sciences (2018)

Mohammad Mobashergermi Reza Zarei Sahamieh M. AGHAZADEH Ahmad Ahmadikhalaj Gholamreza Ahmadzadeh

Petrography and chemistry of minerals showing that Eocene alkaline volcanic rocks in southwestern of Germi (Talesh zone, NW Iran) mostly have basaltic composition. Mineralogically these rocks are composed of diopsidic clinopyroxene and labradoritic plagioclase phenocrysts. The microlithic and glassy groundmass composed of sanidine, clinopyroxene, biotite, pargasitic amphibole and magnetite associated with devitrified glass. Clinopyroxenes show relatively high Mg-numbers (0.76-0.93), low AlVI (mostly <0.1), suggesting relatively low-pressure (~5), and water content ~2.5 to less than 10% and high oxygen fugacity (-8.38-11.51) of crystallization condition. High amount existence of magnetite coexisting with amphibole and biotite mineral confirm high fugacity of the host magma. According to clinopyroxene and feldspar thermometry, estimated crystallization temperature varies between 1106˚C to ~1200 ˚C. The clinopyroxene and amphibole mineral composition of studied rocks indicate that they have been formed in a back-arc basin environment. Mineral chemistry in the current zone shows that composition and genesis of common minerals these magmatic rocks are similar to Pushtasar basaltic rocks in the northern part of this area.

Phenocryst

Amphibole

Mineral redox buffer

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Textural records and geochemistry of the Kermanshah mantle peridotites (Iran): implications for the tectonic evolution of southern Neo-Tethys

Journal of Geosciences (2017)

Ali Moradpour Reza Zarei Sahamieh Ahmad Ahmadi Khalaji Ramin Sarikhani

Kermanshah Ophiolite Complex (NW Iran), located along the Main Zagros Thrust Zone, marks the ophiolitic suture between the Arabian and Sanandaj-Sirjan continental blocks.N-MORB-normalized multielement patterns and chondrite--normalized REE patterns in the Kermanshah mantle restites show depletion in incompatible elements concentrations with respect to the depleted MORB mantle (DMM).In the V vs. Yb diagram, Harsin-Sahneh-Norabad and Miyanrahan peridotites (Kermanshah Ophiolite Complex), due to their relatively low V contents, fall close to the QFM buffer.Calculated TiO 2 and Al 2 O 3 compositions in the parental melt that were in equilibrium with chromian spinel are consistent with supra-subduction zone-type compositions.Besides, calculated FeO/MgO ratios in the parental melts are comparable with those in boninites from Oman ophiolites.Olivine from the peridotite restites is highly magnesian (Fo 89-93 ) with NiO contents of 0.2-0.4wt.%, consistent with formation in a forearc environment.This is also proven by the Cr# and Mg# values as well as TiO 2 , Cr 2 O 3 , and Al 2 O 3 concentrations in chromian spinel of ultramafic rocks.Accordingly, petrogenetic modeling indicates that the Kermanshah ultramafic rocks may represent the residual mantle after extraction of 13-23% of boninitic-type melts.Decompression, melting and melt-rock reaction related textures are widespread in the Kermanshah mantle restites.Field relationships and geochemical evidence reveal that the studied ophiolites were a part of a rifted basin at the ocean-continent transition zone formed in the south Neo-Tethyan Ocean.

10.3190/jgeosci.244

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Citations (4)

Geochemistry, petrogenesis, and tectonic setting of the Almogholagh batholith in the Sanandaj–Sirjan zone, western Iran

Journal of African Earth Sciences (2017)

Manuchehr Amiri Ahmad Ahmadi Khalaji Zahra TahmasbiJ. F. Santos Reza Zarei Sahamieh

Quartz monzonite

Petrogenesis

Batholith

Adakite

10.1016/j.jafrearsci.2017.06.018

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