Petrography and mineral chemistry of metasomatized gabbros from the Anarak Ophiolite

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AHMADI M.; SHARIFI M.; TORABI GH.

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2018 | Volume:26 | Issue:2 Page(s): 437-454

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Title

Petrography and mineral chemistry of metasomatized gabbros from the Anarak Ophiolite

Author(s)

AHMADI M. | SHARIFI M. | TORABI GH. | Issue Writer Certificate

Keywords

Mineral chemistryQ1

whole rock chemistryQ1

gabbroQ2

metasomatismQ2

ophioliteQ2

AnarakQ2

Abstract

The Anarak ophiolite, with E-W trending, located at north of Anarak. In addition to the gabbros in Anarak ophiolite sequence, intrusion of metasomatized gabbros injected into the ophiolite of Anarak in the form of stocks and dykes. metasomatized gabbros are younger than Anarak ophiolite and older than Anarak metamorphic assemblage and contain diopside, augite, actinolitic hornblende, actinolite, tremolite, phlogopite, albite, oligoclase, pycnochlorite, penninite, epidote, garnet, sphene, prehnite, calcite and opaque minerals. Penetration of seawater into the lower crust and upper mantle led to high temperature matasomatism in the gabbros. Positive Pb anomaly and negative Ta, Nb and Ti anomalies in whole rock and minerals chemistry of clinopyroxene and amphibole are markers of volcanic arc tectonic environments and association with subduction zones. Crystallization temperatures of diopside, phlogopite, actinolitic hornblende, actinolite and chlorite are 1150-1200 ° C, 750 ° C, 600 ° C, 450 ° C and 360-540 ° C respectively.

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APA: Copy

AHMADI, M., SHARIFI, M., & TORABI, GH.. (2018). Petrography and mineral chemistry of metasomatized gabbros from the Anarak Ophiolite. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 26(2 ), 437-454. SID. https://sid.ir/paper/388182/en

Vancouver: Copy

AHMADI M., SHARIFI M., TORABI GH.. Petrography and mineral chemistry of metasomatized gabbros from the Anarak Ophiolite. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2018;26(2 ):437-454. Available from: https://sid.ir/paper/388182/en

IEEE: Copy

M. AHMADI, M. SHARIFI, and GH. TORABI, “Petrography and mineral chemistry of metasomatized gabbros from the Anarak Ophiolite,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 26, no. 2 , pp. 437–454, 2018, [Online]. Available: https://sid.ir/paper/388182/en

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