西藏冲江大型斑岩铜(钼金)矿床的发现及意义

郑有业; 高顺宝; 程力军; 李国梁; 冯南平; 樊子珲; 张华平; 郭建慈; 张刚阳

Volume 29 Issue 3

May 2004

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Article Navigation > Earth Science > 2004 > 29(3): 333-339

ZHENG You-ye, GAO Shun-bao, CHENG Li-jun, LI Guo-liang, FENG Nan-ping, FAN Zi-hun, ZHANG Hua-ping, GUO Jian-ci, ZHANG Gang-yang, 2004. Finding and Significances of Chongjiang Porphyry Copper (Molybdenum, Aurum) Deposit, Tibet. Earth Science, 29(3): 333-339.

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Finding and Significances of Chongjiang Porphyry Copper (Molybdenum, Aurum) Deposit, Tibet

1.
Tibet Bureau of Geology and Mineral Exploration and Development, Lhasa 850000, China
2.
Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China

Received Date: 2004-03-15
Publish Date: 2004-05-25

Abstract

Abstract

The Chongjiang copper deposit is a large porphyry copper (molybdenum, aurum) deposit found in Tibet in recent years. It is also the first one that has made great breakthrough during the process of looking for porphyry copper deposit in Gangdise orogenic belt. The deposit has the characters of circular and surfacing model in mineralization and alteration belt. Cu mineralization is according to K-Si alteration belt approximately.Methodssuch as ICPMS on the rocks with mineralization, Re-Os dating on molybdenite and U-Pb dating on zircon, were used in this research. The results show that the mineralizing porphyry enriches in K, Na, Al and light rare earth element (LREE) with high LREE/HREE (8.56-23.1). The porphyry is normal in Eu (δEu=1.001), but weak negative abnormal in Ce (δCe=0.84), and shows the characteristics of the transitional granite between type Ⅰ and type A. The characteristics reflect the magmatism related to asthenospheric upwelling. The Chongjiang porphyry copper (molybdenum, aurum) deposit formed in 14-16 Ma, the transitional period of extrusion and extension in orogenic belt.
- Chongjiang,
- large-scale porphyry copper deposit,
- new progress

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References(9)

References

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