USING GEOCHEMICAL DATA FOR INTERPRETATION OF ORIGIN AND EVOLUTION OF THE MYLONITIC GRANITE IN THE NORTH OF VARZANEH, GOLPAYEGAN

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SHARIFI MORTEZA; NOGHREHEIAN M.; TABATABAEIMANESH S.M.

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Journal: RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE" Year:2008 | Volume:29 | Issue:3 (GEOLOGY) Page(s): 81-96

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Title

USING GEOCHEMICAL DATA FOR INTERPRETATION OF ORIGIN AND EVOLUTION OF THE MYLONITIC GRANITE IN THE NORTH OF VARZANEH, GOLPAYEGAN

Author(s)

SHARIFI MORTEZA | NOGHREHEIAN M. | TABATABAEIMANESH S.M. | Issue Writer Certificate

Keywords

GEOCHEMICAL DATAQ3

INTERPRETATION OF ORIGIN AND EVOLUTION OF THE MYLONITIC GRANITE GOLPAYEGANQ3

Abstract

The mylonitic granite of Varzaneh in the north east of Golpayegan, located within the Sanandaj-Sirjan Zone. The changes in the geochemical diagrams for major elements Versus SiO2 and also the triangular diagrams were used simultaneously to show the changes of two or three elements and to determine the trends of comagmatic complexes and phases of major element and to evaluate the origin and evolution of mylonitic granite in the north of Varzaneh. The diagrams of compatible and incompatible major-trace elements were used to show the simultaneous changes of these elements and also to study the independent or non independent behavior of differentiation processes. The diagrams of normalized trace elements like spider diagrams(related to normalized granitoids, primitive mantle, upper and lower crust, continental crust and ocean ridge granite) were used to interpret the evolution steps of differentiation processes or even the origin of mylonitic granite in the north of Varzaneh. By using experimental evidences, it could be concluded that, the chemical changes within intrusive masses in the north of Varzaneh were apparently preliminarily by differentiating crystallization calcic plagioclase (changes diagram of FeO and MgO versus SiO2), K-feldspar (triangular diagram CaO-Na2O-K2O), biotite (changes diagram of FeO and MgO versus SiO2), and etc. About the origin of mylonitic granites, the results indicate that, although there are some evidences about the assimilation of host rocks, but negative anomalies of Nb in normalized multielement diagrams (spider diagrams) in mylonitic granite of Varzaneh is one of the suitable indexes to determine the origin of continental rocks, which could show the contribution of crust in magmatic processes. The concentration of other trace elements within the mylonitic granite of Varzaneh was controlled by specific minerals including: Zr by zirconium, P by apatite, Sr by plagioclase, Ti and Nb by ilmenite and rutile, Rb, Cs, Ba and Na by feldspars, and also the Cr, Co, Ti, Fe and Mg contents were controlled by ferromagnesian minerals such as biotite.

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APA: Copy

SHARIFI, MORTEZA, NOGHREHEIAN, M., & TABATABAEIMANESH, S.M.. (2008). USING GEOCHEMICAL DATA FOR INTERPRETATION OF ORIGIN AND EVOLUTION OF THE MYLONITIC GRANITE IN THE NORTH OF VARZANEH, GOLPAYEGAN. RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", 29(3 (GEOLOGY)), 81-96. SID. https://sid.ir/paper/55913/en

Vancouver: Copy

SHARIFI MORTEZA, NOGHREHEIAN M., TABATABAEIMANESH S.M.. USING GEOCHEMICAL DATA FOR INTERPRETATION OF ORIGIN AND EVOLUTION OF THE MYLONITIC GRANITE IN THE NORTH OF VARZANEH, GOLPAYEGAN. RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE"[Internet]. 2008;29(3 (GEOLOGY)):81-96. Available from: https://sid.ir/paper/55913/en

IEEE: Copy

MORTEZA SHARIFI, M. NOGHREHEIAN, and S.M. TABATABAEIMANESH, “USING GEOCHEMICAL DATA FOR INTERPRETATION OF ORIGIN AND EVOLUTION OF THE MYLONITIC GRANITE IN THE NORTH OF VARZANEH, GOLPAYEGAN,” RESEARCH JOURNAL OF UNIVERSITY OF ISFAHAN "SCIENCE", vol. 29, no. 3 (GEOLOGY), pp. 81–96, 2008, [Online]. Available: https://sid.ir/paper/55913/en

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