西藏班戈地区雪如岩体的形成环境及成矿意义

高顺宝; 郑有业; 谢名臣; 张众; 闫学欣; 武斌; 罗俊杰

doi:10.3799/dqkx.2011.073

Volume 36 Issue 4

Jul. 2011

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Article Navigation > Earth Science > 2011 > 36(4): 729-739

GAO Shun-bao, ZHENG You-ye, XIE Ming-chen, ZHANG Zhong, YAN Xue-xin, WU Bin, LUO Jun-jie, 2011. Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge, Tibet. Earth Science, 36(4): 729-739. doi: 10.3799/dqkx.2011.073

Citation:

GAO Shun-bao, ZHENG You-ye, XIE Ming-chen, ZHANG Zhong, YAN Xue-xin, WU Bin, LUO Jun-jie, 2011. Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge, Tibet. Earth Science, 36(4): 729-739. doi: 10.3799/dqkx.2011.073

Citation:

GAO Shun-bao, ZHENG You-ye, XIE Ming-chen, ZHANG Zhong, YAN Xue-xin, WU Bin, LUO Jun-jie, 2011. Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge, Tibet. Earth Science, 36(4): 729-739. doi: 10.3799/dqkx.2011.073

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Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge, Tibet

doi: 10.3799/dqkx.2011.073

1.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China
2.
State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan 430074, China
3.
Geological Team of Northeast Hubei, Xiaogan 432100, China
4.
No.292 Team of Geo-exploration Institute, Guangdong Provincial Nuclear Industry Geology Bureau, Heyuan 517001, China

Received Date: 2010-05-12
Publish Date: 2011-07-01

Abstract

Abstract

The Xueru intrusion is chiefly composed of medium-fine-grained monzogranite and medium-coarse-grained porphyritic monzogranite. There are a large number of skarn iron and copper deposits around the contact zone with the Langshan Formation limestone. The rock and zircon LA-ICP-MS U-Pb, XRF, ICP-AES and other analysis show that the monzogranite is enriched in K₂O, SiO₂, LREE and Rb, Ba, Pb, Th and other large ion lithophile elements; high field strength elements such as Nb, Ta, Sr, Ti are relatively poor; REE distribution curve is significantly rightward, with moderate negative Eu anomaly. The granites belong to high-K calc-alkaline-shoshonitic rock series, and the post-collision granite, which formed in 79.25±0.97 Ma and 79.72±0.51 Ma, in the stage of post-collision between Qiangtang block and the Lhasa block after the late of Early Cretaceous-the beginning of Late Cretaceous Bangonghu-Nujiang suture closed. It is concluded that the source of Xueru intrusion is the lower crust garnet amphibolite facies-plagioclase amphibolite facies mafic rocks which are rich in fluid, the granites formed by partial melting of the mafic rocks in the post-collision environment, which is very conductive to the formation of copper-polymetallic deposit in Ban'ge area, the mineralization of skarn iron and copper deposits occurred around 80 Ma. This study can greatly facilitate regional mineral exploration.
- petrology,
- geochemistry,
- mineralization

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References(48)

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Geodynamic Setting and Mineralizational Implication of the Xueru Intrusion in Ban'ge, Tibet

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