Mineral chemistry and thermometry of the high-Mg ultramafic lava flows (Komatiite), NE Iran: Evidence of plume-arc interaction in the Upper Paleozoic Mashhad-Fariman subduction zone

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MOBASHERI MOHSEN; Ghasemi Habiballah; RAHIMI BEHNAM; Gourabjiri pour Arash

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Journal: PETROLOGY Year:2019 | Volume:10 | Issue:39 Page(s): 25-52

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Title

Mineral chemistry and thermometry of the high-Mg ultramafic lava flows (Komatiite), NE Iran: Evidence of plume-arc interaction in the Upper Paleozoic Mashhad-Fariman subduction zone

Author(s)

MOBASHERI MOHSEN | Ghasemi Habiballah | RAHIMI BEHNAM | Gourabjiri pour Arash | Issue Writer Certificate

Keywords

mineral chemistryQ1

thermometryQ2

komatiiteQ1

MashhadQ2

FarimanQ2

IranQ2

Abstract

In the northeast of Iran, there are some outcrops of high-Mg ultramafic volcanic rocks. These rocks have been interpreted as an ideal ophiolite sequence related to the closure of Paleo-Tethys. According to detailed field observations, the komatiitic lava flows in Shandiz-VIrani-Mashhad Complex (SVMC) and Fariman Complex (FC) are interlayered with the Upper Paleozoic submarine turbiditic sediments (Carboniferous-Permian). These rocks have a wide range of volcanic facies and according to the lithofacies characteristics, are divided into three groups of differentiated, undifferentiated lava flows and pillow lavas with a variety of volcanic textures and glass groundmass and with the main minerals of olivine, chromian spinel, clinopyroxene and amphibole. In this paper, the komatiitic nature of these rocks has been proven by explicit evidence from the field features petrography, internal stratigraphy and mineral chemistry. Also, the interaction of a mantle plume with the late Paleozoic (Permian) northeast subduction zone of Paleo-Tethys in NE Iran is considered as the suitable petrogenetic model involved in the genesis of the Komatiitic magma. This model can well justify and interpret the various geochemical characteristics of the studied rocks.

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APA: Copy

MOBASHERI, MOHSEN, Ghasemi, Habiballah, RAHIMI, BEHNAM, & Gourabjiri pour, Arash. (2019). Mineral chemistry and thermometry of the high-Mg ultramafic lava flows (Komatiite), NE Iran: Evidence of plume-arc interaction in the Upper Paleozoic Mashhad-Fariman subduction zone. PETROLOGY, 10(39 ), 25-52. SID. https://sid.ir/paper/389473/en

Vancouver: Copy

MOBASHERI MOHSEN, Ghasemi Habiballah, RAHIMI BEHNAM, Gourabjiri pour Arash. Mineral chemistry and thermometry of the high-Mg ultramafic lava flows (Komatiite), NE Iran: Evidence of plume-arc interaction in the Upper Paleozoic Mashhad-Fariman subduction zone. PETROLOGY[Internet]. 2019;10(39 ):25-52. Available from: https://sid.ir/paper/389473/en

IEEE: Copy

MOHSEN MOBASHERI, Habiballah Ghasemi, BEHNAM RAHIMI, and Arash Gourabjiri pour, “Mineral chemistry and thermometry of the high-Mg ultramafic lava flows (Komatiite), NE Iran: Evidence of plume-arc interaction in the Upper Paleozoic Mashhad-Fariman subduction zone,” PETROLOGY, vol. 10, no. 39 , pp. 25–52, 2019, [Online]. Available: https://sid.ir/paper/389473/en

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