The Study of mineral chemistry, tectonomagmatic setting and petrogenesis of plutonic bodies in Sursat Complex, NW Takab, Iran

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DADFAR S.; ALIANI F.; BAHARIFAR A.A.; ZARINKOUB M.H.

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Journal: Iranian Journal of Geology Year:2019 | Volume:13 | Issue:49 Page(s): 77-97

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Title

The Study of mineral chemistry, tectonomagmatic setting and petrogenesis of plutonic bodies in Sursat Complex, NW Takab, Iran

Author(s)

DADFAR S. | ALIANI F. | BAHARIFAR A.A. | ZARINKOUB M.H. | Issue Writer Certificate

Keywords

I-Type granitoideQ1

Mineral chemistryQ1

Crustal contaminationQ1

Magma mixingQ2

NW TakabQ1

Abstract

The plutonic bodies occurring in Sursat complex are some parts of plutonic rocks of Sanandaj-Sirjan Zone. Based on the field observations and microscopic studies, rocks of the study area are consist of hornblende gabbro, quartz diorite, monzodiorite, granodiorite and tonalite. The EPMA analyses of minerals such as amphiboles (in granodiorite and monzodiorite), plagioclases and alkali feldspars indicate that amphiboles are magnesiohornblende, plagioclases are albite and oligoclase and alkali feldspares are orthoclase. Geochemical studies indicate that monzodiorite unit (Turke Dare and Khangholi bodies) are metaluminous I-type and calc-alkaline in nature. They are plotted in volcanic arc granite (VAG) region with 87Sr/86Sr and ε Nd values equal to 0. 70448 and-0. 12. All evidence represent that the monzodiorite were generated from a magma which was derived from mantle affected by assimilation and contamination processes. Granodiorite unit (Pichaghci, Hamzeh Ghasem and Northeast Khangholi bodies) represents I-type, metaluminous to peraluminous and calc-alkaline characteristics and is plotted in VGA field of magmatic arc. The 87Sr/86Sr and ε Nd values are equal to 0. 70529 and-2. 82 respectively. So these granodiorites were generated through mixing processes of a mantle magma with crustal sources. Tonalite– trondhjemites group are I-type, tholeiitic, peraluminous according to the low value of Mg# (2. 9-11. 6), Cr (20-46 ppm) and Ni (1-2. 4 ppm) contents. They are also low in LA/Yb, Sr/Y, and Nb/Ta. The slight negative anomaly in fractionated patterns of the rare earth elements (REE) and very low depletion in Eu, indicate that these rocks were resulted from amphibolitic crustal source that were previousely generated from thickened mafic crust or from basaltic plate in low pressures at shallow depth in the presence of abundant plagioclase.

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APA: Copy

DADFAR, S., ALIANI, F., BAHARIFAR, A.A., & ZARINKOUB, M.H.. (2019). The Study of mineral chemistry, tectonomagmatic setting and petrogenesis of plutonic bodies in Sursat Complex, NW Takab, Iran. IRANIAN JOURNAL OF GEOLOGY, 13(49 ), 77-97. SID. https://sid.ir/paper/129459/en

Vancouver: Copy

DADFAR S., ALIANI F., BAHARIFAR A.A., ZARINKOUB M.H.. The Study of mineral chemistry, tectonomagmatic setting and petrogenesis of plutonic bodies in Sursat Complex, NW Takab, Iran. IRANIAN JOURNAL OF GEOLOGY[Internet]. 2019;13(49 ):77-97. Available from: https://sid.ir/paper/129459/en

IEEE: Copy

S. DADFAR, F. ALIANI, A.A. BAHARIFAR, and M.H. ZARINKOUB, “The Study of mineral chemistry, tectonomagmatic setting and petrogenesis of plutonic bodies in Sursat Complex, NW Takab, Iran,” IRANIAN JOURNAL OF GEOLOGY, vol. 13, no. 49 , pp. 77–97, 2019, [Online]. Available: https://sid.ir/paper/129459/en

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