Petrology, geochemistry and origion of Rigmalak granite, southeast of Zahedan

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baiabangard habib; Rigi Sodabeh; Solouki Hamid reza

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Journal: Iranian Journal of Crystallography and Mineralogy Year:2020 | Volume:27 | Issue:4 Page(s): 839-854

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Title

Petrology, geochemistry and origion of Rigmalak granite, southeast of Zahedan

Author(s)

baiabangard habib | Rigi Sodabeh | Solouki Hamid reza | Issue Writer Certificate

Keywords

Rigmalak granitoidQ1

Sistan Suture ZoneQ2

calc-alkalineQ2

I type graniteQ1

ZahedanQ2

Abstract

The Rigmalak granitoid is located East of Taftan volcano, southeast of Zahedan, in Sistan Suture Zone. This pluton (Oligo-Miocene) has intruded into Eocene Flysch deposidt and cause low metamorphism in the borders. This pluton is composed of granite, synogranite, monzogranite, granodiorite, tonalite, pegmatitie and diorite in composition. The main minerals in this pluton are quartz, plagioclase, orthoclase, biotite and hornbelande and they are mainly granoular to pegmatitic in texlures. Presence of biotite and hornbelends minerals in this granitoides show that it is simillar to Zahedan granitoid and it is belonging to I type granite. Geochemical studies show that these rocks have calcalkaline to low alkaline magmatic series and metaluminous, I type, enrichment from LREE and LILE and depleted from HREE and HFSE. Major, rare and trace elements digramas of shows crystal defferintation is important role the formation pluton. Digrams normalized to chondorite and primitive mantle show that rocks formed this pluton are enriched in LREE to HREE and dominantly simillar and parall trends. Also, Zr and Th elements show positive anomalyes and Sr, Nb and Ti negative anomalyes, similar to subduction zones. Tectono magmatic diagrams show Rigmalak granitoid rocks related to syncollision to low post collision environments. Geochemical evidence of Rigmalak samples showed that crystal differentiation was not the only effective process in the formation of magma but may be several phases or melting of a phase with different degrees also may happened in the region. It seems that the formation of this granitoid in the Sistan Suture Zone is related to the collisions between Lut and Afghan blocks.

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APA: Copy

baiabangard, habib, Rigi, Sodabeh, & Solouki, Hamid reza. (2020). Petrology, geochemistry and origion of Rigmalak granite, southeast of Zahedan. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, 27(4 ), 839-854. SID. https://sid.ir/paper/372944/en

Vancouver: Copy

baiabangard habib, Rigi Sodabeh, Solouki Hamid reza. Petrology, geochemistry and origion of Rigmalak granite, southeast of Zahedan. IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY[Internet]. 2020;27(4 ):839-854. Available from: https://sid.ir/paper/372944/en

IEEE: Copy

habib baiabangard, Sodabeh Rigi, and Hamid reza Solouki, “Petrology, geochemistry and origion of Rigmalak granite, southeast of Zahedan,” IRANIAN JOURNAL OF CRYSTALLOGRAPHY AND MINERALOGY, vol. 27, no. 4 , pp. 839–854, 2020, [Online]. Available: https://sid.ir/paper/372944/en

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