Geochemistry Characteristics and Tectonic Significance of the Igneous Rocks from the Eastern Tianshan Mountains

YANG Zhen; GULIBAHAER Abudurexiti; MUHETAER Zari; SHE Jianzhong

Northwestern Geology > 2015 > 48(2): 104-111.

YANG Zhen, GULIBAHAER Abudurexiti, MUHETAER Zari, et al. Geochemistry Characteristics and Tectonic Significance of the Igneous Rocks from the Eastern Tianshan Mountains[J]. Northwestern Geology, 2015, 48(2): 104-111.

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Geochemistry Characteristics and Tectonic Significance of the Igneous Rocks from the Eastern Tianshan Mountains

1.
No.11 Geological party, BGMRED of Xinjiang, Changji 831100, Xinjiang, China
2.
Comprehensive Geological Exploration Team Coalfield Geology Bureau of Xinjiang Province, Urumqi 830009, Xinjiang, China
3.
College of Geology and Mining Engineering, Xinjiang University, Urumqi 830046, Xinjiang, China
4.
Geological Research Academe of Xinjiang, Urumqi 830011, Xinjiang, China

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Received Date: December 02, 2014
Revised Date: April 06, 2015
Published Date: June 04, 2015

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Abstract

Abstract

This paper systematically summarized the geochemical characteristics of late Paleozoic igneous rocks in the Jueluotage area of Eastern Tianshan. The igneous rockis mainly formed by early Carboniferous to middle Permian volcanic and intrusive rocks, and its formation is relevant with the northward subduction of Kangguer ocean.The igneous rock of early Carboniferous is composed of calc-alkaline island arc volcanics formed in the initial stage of slab subduction and high-potassium calc-alkalineI-type granite with a characteristic of low temperature and low pressure. The igneous rock of late Carboniferous is post-collision arc volcanics. The igneous rock of early Permian is composed of the volcanic in the post-collision arc and intraplate environment, and I-type granite with a characteristic of high temperature and high pressure. The igneous rock of middle Permian is high-potassium calc-alkaline A-type granite with characteristics of high temperature and low pressure.The results of previous studies and this paper suggest that this region experienced a tectonic evolution from subduction-collision to collision-orogenesis and post-orogenic intracontinental extension in late Paleozoic.
- late Paleozoic,
- igneous rock,
- geochemistry

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Geochemistry Characteristics and Tectonic Significance of the Igneous Rocks from the Eastern Tianshan Mountains

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