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Qulong Porphyry-Skarn Metallogenic System in Gangdese Belt, Tibet: Evidence from Molybdenite Re-Os Geochronology

Zhang Jinshu1, 2, Duo Ji2, Xia Daixiang3, Zhong Kanghui1,Wu Hua2, Li Guangming4   

  1. 1.Department of Earth Sciences, Chengdu University of Technology, Chengdu610059, China;
    2.Tibet Institute of Geological Survey, Lhasa850000, China;
    3.Tibet Julong Copper Limited., Lhasa850030, China;
    4.Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing100029, China
  • Received:2012-10-08 Online:2013-09-26 Published:2013-09-26

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Abstract:

Nearby the Qulong gaint porphyry Cu-Mo deposit at the Gangdese belt in Tibet, there are two typical skarn Cu deposits. The Zhibula deposit is 2 km south and Langmujiaguo is 4 km southeast to the Qulong deposit. It’s reported that the Re-Os isotopic age of the molybdenite dating from Langmujiaguo skarn deposit is (17.11±0.55) Ma. Combined with the published dating data from Qulong and Zhibula, a conclusion can be drawn that those deposits in the Qulong area were derived from the common magmatic hydrothermal mineralization and they may belong to a complete porphyry-skan ore-forming system. More attention should be paid to the porphyry deposits and the adjacently skarn deposits during geological prospecting and exploration at Gangdese belt.

Key words: Qulong, Langmujiaguo, porphyry Cu-Mo deposit, skarn copper deposit, molybdenite Rhenium-Osmium dating, isotopes, Gangdese belt

CLC Number: 

  • P618.41
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