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GENESIS AND GEOLOGICAL CHARACTERISTICS OF THE GRANITIC BATHOLITHS IN EAST QILIAN OROGENY

Yanjie Zhang, Deng Ya-ping

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Abstract

The granitic batholiths are divided into 2 instrusive sequences.They expose between Huajia mountain and Zhangjiachuan area,the eastest section of Qilian orogenic zone.The Ⅰ Period instrusive batholiths resulted from the volcanic arc evironment that was associated with ocean plates dive during Caledonia.It is calc-alklic in composition and changes in mineral components,the other resulted from superposition orogeny within land during Indosinian,it is high K-alklic in composition and changes in mineral constructures.The magmatism in the area was associated with the process that includes tectonic plates diving,collosure and superposition orogeny within land.

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What this paper is about

The granitic batholiths are divided into 2 instrusive sequences.They expose between Huajia mountain and Zhangjiachuan area,the eastest section of Qilian orogenic zone.The Ⅰ Period instrusive batholiths resulted from the volcanic arc evironment that was associated with ocean plates dive during Caledonia.It is calc-alklic in composition and changes in mineral components,the other resulted from superposition orogeny within land during Indosinian,it is high K-alklic in composition and changes in mineral constructures.The magmatism in the area was associated with the process that includes tectonic plates diving,collosure and superposition orogeny within land.

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Available abstract

The granitic batholiths are divided into 2 instrusive sequences.They expose between Huajia mountain and Zhangjiachuan area,the eastest section of Qilian orogenic zone.The Ⅰ Period instrusive batholiths resulted from the volcanic arc evironment that was associated with ocean plates dive during Caledonia.It is calc-alklic in composition and changes in mineral components,the other resulted from superposition orogeny within land during Indosinian,it is high K-alklic in composition and changes in mineral constructures.The magmatism in the area was associated with the process that includes tectonic plates diving,collosure and superposition orogeny within land.

Key concepts: Batholith, Orogeny, Geology, Geochemistry, Tectonics, Magmatism, Volcano, Earth science

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