华北与西伯利亚板块的对接过程: 来自西拉木伦缝合带变形花岗岩锆石LA-ICP-MS U-Pb年龄证据

李益龙; 周汉文; 钟增球; 张雄华; 廖群安; 葛梦春

Volume 34 Issue 6

Jun. 2009

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Article Navigation > Earth Science > 2009 > 34(6): 931-938

LI Yi-long, ZHOU Han-wen, ZHONG Zeng-qiu, ZHANG Xiong-hua, LIAO Qun-an, GE Meng-chun, 2009. Collision Processes of North China and Siberian Plates: Evidence from LA-ICP-MS Zircon U-Pb Age on Deformed Granite in Xar Moron Suture Zone. Earth Science, 34(6): 931-938.

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Collision Processes of North China and Siberian Plates: Evidence from LA-ICP-MS Zircon U-Pb Age on Deformed Granite in Xar Moron Suture Zone

1.
Faculty of Earth Sciences, ChinaUniversity of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2008-09-12
Publish Date: 2009-11-25

Abstract

Abstract

The Fangkuangzigou granitic gneisses, extending with NEE trend along Fangkuangzi village in Linxi county, Inner-Mongolia province, are deformed and metamorphosed granites which intruded into the Shuangjing schists. The gneisses are nebulitic and homogeneous separately in its edge and center. The LA-ICP-MS zircon U-Pb dating method was applied to determine the ages of gneisses both from the edge and center. It is indicated that the magma emplacement initiated at about 271.9±1.6Ma ago and intruded into Shuangjing schists, then migmatization and nebulitic structure were induced into the contact zones. The pluton was formed dominantly at 264.8±1.8 Ma ago. The pluton was deformed and metamorphosed into granitic gneiss by the collision betweenthe Siberian and North China plates. The collision was ended until 231±2 Ma ago, then the Siberian and North China plates were finally converged.
- granitic gneiss,
- zircon,
- LA-ICP-MS dating,
- geochronology,
- Shuangjing,
- Inner-Mongolia

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References(24)

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Collision Processes of North China and Siberian Plates: Evidence from LA-ICP-MS Zircon U-Pb Age on Deformed Granite in Xar Moron Suture Zone

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