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Title

Ar/Ar Dating, Geochemistry and Petrogenesis of Khersrah Intrusive mass

Pages

  135-144

Abstract

 The Kharsare intrusive mass (South of Ghorveh) is located in the middle part of the Sanandaj– Sirjan zone. The batholith comprises three plutonic units including gabbro-diorite, granite and syenite. In addition, the hybrid rocks with a lot of mixing and minling evidences (including lobate or/and ellipsoidal micro granular mafic enclaves sometimes with chilled margins in granite or in hybrid rocks; net-veining granite; and synplutonic brecciated mafic dikes) crop out in interaction zone between granites and gabbros. The calc-alkaline and metaluminous gabbro-diorite and High-K calc-alkaline and peraluminous granites emplaced in Late Jurassic, simultaneously. The peraluminous A-type syenite formed later and intrude two above mentioned plutonic rocks. Geochemical features suggest that gabbro-diorites and granites formed in an active continental margins. It seems the pioneer mafic magma formed in a subduction setting by partial melting of metasomatized mantle. It ascent and emplace in lower crust to produce the granitic melt. The mingling and mixing evidences that may support local crustal contamination of the mafic melt. The younger syenite is resulted from heating by intrusion of the mafic magma in the end phase of continental arc magmatism.

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    APA: Copy

    GHALAMGHASH, J., Houshmand, Sara, Shaikhzakariaee, Sayad Jamal, & Rashid, Hamideh. (2020). Ar/Ar Dating, Geochemistry and Petrogenesis of Khersrah Intrusive mass. GEOSCIENCES, 29(116 ), 135-144. SID. https://sid.ir/paper/388491/en

    Vancouver: Copy

    GHALAMGHASH J., Houshmand Sara, Shaikhzakariaee Sayad Jamal, Rashid Hamideh. Ar/Ar Dating, Geochemistry and Petrogenesis of Khersrah Intrusive mass. GEOSCIENCES[Internet]. 2020;29(116 ):135-144. Available from: https://sid.ir/paper/388491/en

    IEEE: Copy

    J. GHALAMGHASH, Sara Houshmand, Sayad Jamal Shaikhzakariaee, and Hamideh Rashid, “Ar/Ar Dating, Geochemistry and Petrogenesis of Khersrah Intrusive mass,” GEOSCIENCES, vol. 29, no. 116 , pp. 135–144, 2020, [Online]. Available: https://sid.ir/paper/388491/en

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