PETROGRAPHICAL AND GEOCHEMICAL CHARACTERISTICS OF ENCLAVES IN ASTANEH AREA (SOUTHWEST OF ARAK)

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TAHMASBI ZARA; KHALILI MAHMOUD; AHMADI KHALAJI AHMAD

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

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Journal: PETROLOGY Year:2011 | Volume:2 | Issue:6 Page(s): 31-46

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Information Journal Paper

Title

PETROGRAPHICAL AND GEOCHEMICAL CHARACTERISTICS OF ENCLAVES IN ASTANEH AREA (SOUTHWEST OF ARAK)

Author(s)

TAHMASBI ZARA | KHALILI MAHMOUD | AHMADI KHALAJI AHMAD | Issue Writer Certificate

Keywords

ASTANEHQ3

ENCLAVEQ2

MAGMA MIXINGQ2

MAGMA MINGLINGQ2

Abstract

The ASTANEH granodiorite intrusion, located in the southwest of Arak, is characterized by rounded and rarely ellipsoid microgranular ENCLAVEs ranging in composition from gabbro to diorite and quartz diorite. The diameter of ENCLAVEs varies from a few millimeters to 40 centimeters. In the marginal part, the ENCLAVE forming-minerals are finer than that of the central parts. The fine grained ENCLAVEs are an evidence of rapid magma cooling which these rocks were surrounded by host felsic magma. Petrographical evidences such as ocellar quartz, acicular apatite, bladed biotite, poikilitic textures and pargasitic amphibole in all of the ENCLAVEs show that MAGMA MINGLING occurred. The enrichment of the studied ENCLAVEs in CO, Ni, Cr and HREE display that these rocks are globules of mafic magmas mingling to felsic type.

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References

THE COMPARISON OF VARITY AMPHIBOLE AND GEOTHERMOBAROMETRY INTRUSIVE BODY OF ASTANEH (SANANDAJ-SIRJAN ZONE)

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APA: Copy

TAHMASBI, ZARA, KHALILI, MAHMOUD, & AHMADI KHALAJI, AHMAD. (2011). PETROGRAPHICAL AND GEOCHEMICAL CHARACTERISTICS OF ENCLAVES IN ASTANEH AREA (SOUTHWEST OF ARAK). PETROLOGY, 2(6), 31-46. SID. https://sid.ir/paper/196990/en

Vancouver: Copy

TAHMASBI ZARA, KHALILI MAHMOUD, AHMADI KHALAJI AHMAD. PETROGRAPHICAL AND GEOCHEMICAL CHARACTERISTICS OF ENCLAVES IN ASTANEH AREA (SOUTHWEST OF ARAK). PETROLOGY[Internet]. 2011;2(6):31-46. Available from: https://sid.ir/paper/196990/en

IEEE: Copy

ZARA TAHMASBI, MAHMOUD KHALILI, and AHMAD AHMADI KHALAJI, “PETROGRAPHICAL AND GEOCHEMICAL CHARACTERISTICS OF ENCLAVES IN ASTANEH AREA (SOUTHWEST OF ARAK),” PETROLOGY, vol. 2, no. 6, pp. 31–46, 2011, [Online]. Available: https://sid.ir/paper/196990/en

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