GEOCHEMISTRY AND MINERAL CHEMISTRY OF SHAHABAD GABBROIC INTRUSION, NW NOURABAD, LORESTAN PROVINCE

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ZAREI SAHAMIEH REZA; TABAKH SHABANI AMIR ALI; SHAHROKHI SEYED VAHID; BAREK NASRIN

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Journal: JOURNAL OF ECONOMIC GEOLOGY Year:2014 | Volume:5 | Issue:2 Page(s): 291-305

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Title

GEOCHEMISTRY AND MINERAL CHEMISTRY OF SHAHABAD GABBROIC INTRUSION, NW NOURABAD, LORESTAN PROVINCE

Author(s)

ZAREI SAHAMIEH REZA | TABAKH SHABANI AMIR ALI | SHAHROKHI SEYED VAHID | BAREK NASRIN | Issue Writer Certificate

Keywords

GABBROQ2

CLINOPYROXENEQ2

OLIVINEQ2

PLAGIOCLASEQ1

SANANDAJ–SIRJAN ZONEQ3

SHAHABADQ2

LORESTANQ2

Abstract

The SHAHABAD GABBROic intrusion, with NW-SE trend cropped out at the boundary of Zagros and Sanandaj-Sirjan zones is composed of OLIVINE GABBRO, orthoGABBRO and troctolite. PLAGIOCLASE, CLINOPYROXENE and OLIVINE are the main minerals; and magnetite, titanomagnetite and serpentine are minor and secondary minerals. Microprobe analyses of the minerals show that PLAGIOCLASE is labradorite, pyroxene diopsidic augite and OLIVINE, chrysolite. The rocks appear to have calc-alkaline and metaluminous nature. The plots of some trace elements and composition of CLINOPYROXENEs in the tectonic discrimination diagrams indicate a volcanic arc environment. In addition, spider diagram pattern of elements shows Sr enrichment and Ti, Nb, Zr and P depletion, typical characteristics of volcanic arc subduction related magmas. Furthermore, close similarity between the patterns of spider diagram for the SHAHABAD pluton with those of Andean basic rocks suggests that the SHAHABAD calc-alkaline basic magma may have formed in a subduction environment. Based on geological, geochemical and mineralogical features, formation of the GABBROs, as a part of ophiolite mélange, is attributed to a suprasubduction system.

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APA: Copy

ZAREI SAHAMIEH, REZA, TABAKH SHABANI, AMIR ALI, SHAHROKHI, SEYED VAHID, & BAREK, NASRIN. (2014). GEOCHEMISTRY AND MINERAL CHEMISTRY OF SHAHABAD GABBROIC INTRUSION, NW NOURABAD, LORESTAN PROVINCE. JOURNAL OF ECONOMIC GEOLOGY, 5(2), 291-305. SID. https://sid.ir/paper/180436/en

Vancouver: Copy

ZAREI SAHAMIEH REZA, TABAKH SHABANI AMIR ALI, SHAHROKHI SEYED VAHID, BAREK NASRIN. GEOCHEMISTRY AND MINERAL CHEMISTRY OF SHAHABAD GABBROIC INTRUSION, NW NOURABAD, LORESTAN PROVINCE. JOURNAL OF ECONOMIC GEOLOGY[Internet]. 2014;5(2):291-305. Available from: https://sid.ir/paper/180436/en

IEEE: Copy

REZA ZAREI SAHAMIEH, AMIR ALI TABAKH SHABANI, SEYED VAHID SHAHROKHI, and NASRIN BAREK, “GEOCHEMISTRY AND MINERAL CHEMISTRY OF SHAHABAD GABBROIC INTRUSION, NW NOURABAD, LORESTAN PROVINCE,” JOURNAL OF ECONOMIC GEOLOGY, vol. 5, no. 2, pp. 291–305, 2014, [Online]. Available: https://sid.ir/paper/180436/en

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