Petrology, geochemistry and origin of Mirabad dacitoid dykes, south of Zahedan (Southeast of Iran)

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BIABANGARD HABIB; Baghari Sasan; Visinasab Sohila

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Journal: PETROLOGY Year:2020 | Volume:10 | Issue:40 Page(s): 67-82

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Information Journal Paper

Title

Petrology, geochemistry and origin of Mirabad dacitoid dykes, south of Zahedan (Southeast of Iran)

Author(s)

BIABANGARD HABIB | Baghari Sasan | Visinasab Sohila | Issue Writer Certificate

Keywords

Dacitoid dykesQ1

Sistan suture zoneQ1

collisionQ1

MirabadQ1

ZahedanQ2

Abstract

The Mirabad Dacitoid dykes exposed in the Sistan and Baluchestan province, Sistan suture zone and South of Zahedan city, near Mirabad village. These dykes, with mainly dacitoid in composition, are hosted by the Eocene flysch assemblages and the Cretaceous ophiolitic mé lange. They are composed of plagioclase, quartz, hornblende and biotite minerals and the dominant texture is porphyry. The studied dykes have sharp boundary with host rocks and sometimes have metapelitic enclaves. They are calc-alkaline, meta-aluminous and I-type nature with LREE and LILE enrichment and HREE and HFSE depletion. Europium does not show any distinct anomaly reflecting the oxidation state of magma. The rocks under study have a common origin on the base of similar REE trends and spider diagram and are related to subduction environments on tectonomagmatic diagrams. Based on the Ta/Yb versus Th/Yb tectonomagmatic diagram, it is possibly that the parent magma derived from the mantle wedge above the subduction plate, which is usually affected by the fluids released from the subducted plate and their elements (including silica, potassium and sodium). The overall results indicate that the investigated dykes are synmagmatism occurred during subduction of Neothytean oceanic crust between the Lut and the Afghan blocks.

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APA: Copy

BIABANGARD, HABIB, Baghari, Sasan, & Visinasab, Sohila. (2020). Petrology, geochemistry and origin of Mirabad dacitoid dykes, south of Zahedan (Southeast of Iran). PETROLOGY, 10(40 ), 67-82. SID. https://sid.ir/paper/388289/en

Vancouver: Copy

BIABANGARD HABIB, Baghari Sasan, Visinasab Sohila. Petrology, geochemistry and origin of Mirabad dacitoid dykes, south of Zahedan (Southeast of Iran). PETROLOGY[Internet]. 2020;10(40 ):67-82. Available from: https://sid.ir/paper/388289/en

IEEE: Copy

HABIB BIABANGARD, Sasan Baghari, and Sohila Visinasab, “Petrology, geochemistry and origin of Mirabad dacitoid dykes, south of Zahedan (Southeast of Iran),” PETROLOGY, vol. 10, no. 40 , pp. 67–82, 2020, [Online]. Available: https://sid.ir/paper/388289/en

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