Petrology of Oigocene volcanic rocks in the Deh Tah area, south of Dehuk, Lut Block

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KHALATBARI JAFARI M.; Banehee n.; FARIDI M.

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Journal: Iranian Journal of Geology Year:2021 | Volume:14 | Issue:56 Page(s): 21-41

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Title

Petrology of Oigocene volcanic rocks in the Deh Tah area, south of Dehuk, Lut Block

Author(s)

KHALATBARI JAFARI M. | Banehee n. | FARIDI M. | Issue Writer Certificate

Keywords

AndesiteQ2

Magma minglingQ2

Post-collisionQ1

Calc-alkalineQ2

Abstract

The study area in the south of Deh Tah, Lut Block comprise Oligocene volcanic rocks which are composed of Andesite, trachyAndesite, dacite and rhyolite. These lavas have porphyric to porphyritic textures with abundant amphibole phenocrysts. Most of the Oligocene lavas display calck alkaline to high-K calck alkaline magmatic affinities. In the binary diagrams, the andesitic to trachyandesitic samples cluster far away from the trachydacitic, dacitic and rhyolitic samples suggesting that they were not afftected only by magmatic differentiation. The REE patterns and spider diagrams show enrichement in light ion litophile element (LILE) and hight field strength element (HFSE) depletion. The normalized patterns of the Andesite to trachyandsite have a reliable overlap with oceanic island basalt (OIB). The patterns of the acidic lavas are correlated with the patterns of continental crust. These geochemical evidence indicate that the andesitic to trachyandesitic lavas are generated from partial melting of lithospheric mantle which previously metasomatized by subduction components (melt-fluids). Partial melting of the continental crust has an important role in generation of the acidic lavas. Based on geological setting and geochemical data, it seems that the Oligocene volcanic rocks formed in a Post-collision zone, due to thinning of the continental lithosphere in Lut Block. This process is probably related to lithospheric delamination which occurs in a Post-collisional zone in Lut Block, as a part of the Alpine-Hymalaya orogenic belt.

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APA: Copy

KHALATBARI JAFARI, M., Banehee, n., & FARIDI, M.. (2021). Petrology of Oigocene volcanic rocks in the Deh Tah area, south of Dehuk, Lut Block. IRANIAN JOURNAL OF GEOLOGY, 14(56 ), 21-41. SID. https://sid.ir/paper/407260/en

Vancouver: Copy

KHALATBARI JAFARI M., Banehee n., FARIDI M.. Petrology of Oigocene volcanic rocks in the Deh Tah area, south of Dehuk, Lut Block. IRANIAN JOURNAL OF GEOLOGY[Internet]. 2021;14(56 ):21-41. Available from: https://sid.ir/paper/407260/en

IEEE: Copy

M. KHALATBARI JAFARI, n. Banehee, and M. FARIDI, “Petrology of Oigocene volcanic rocks in the Deh Tah area, south of Dehuk, Lut Block,” IRANIAN JOURNAL OF GEOLOGY, vol. 14, no. 56 , pp. 21–41, 2021, [Online]. Available: https://sid.ir/paper/407260/en

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