Journal of Jilin University(Earth Science Edition) ›› 2017, Vol. 47 ›› Issue (5): 1405-1418.doi: 10.13278/j.cnki.jjuese.201705106

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Re-Os Isotopic Dating of Molybdenite from Bizigou Cu Deposit in Zhongtiao Mountain and Its Implication

Geng Yanguang1, Jian Wei2, Li Hongying2, Ye Huishou2, Bi Minfeng2, Hu Qiaoqing2, Li Chao3, Fan Chenglong1, Wang Mengqi2   

  1. 1. School of Geosciences and Resources, China University of Geosciences, Beijing 100083, China;
    2. Institute of Mineral Resources, Chinese Academy of Geological Sciences/Key Laboratory of Metallogeny and Mineral Assessment, MRL, Beijing 100037, China;
    3. National Research Center for Geoanalysis, Beijing 100037, China
  • Received:2017-04-11 Online:2017-09-26 Published:2017-09-26
  • Supported by:
    Supported by National Natural Science Foundation of China(41602074),Project of China Geological Survey(DD20160124)and Special Fund for Basic Scientific Research Business of Central Public Research Institutes(YYWF201510)

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Abstract: The Bizigou Cu deposit is located in the field of "Hu-Bi" type Cu ore district in Zhongtiao mountain in the southern edge of the North China craton, and it was formed through multiple mineralization events. The orebodies are consistent with the attitude of stratum, and are bedded in the Bizigou Formation and Yuyuanxia Formation. Molybdenite and chalcopyrite occur disseminated in the molybdenite-bearing calcite-quartz veins. Re-Os molybdenite model ages fall in the range from (1 539±26) to (1 616±26) Ma with an isochron age of (1 522±180) Ma (MSWD=9.6) and a weighted mean model age of (1 577±31) Ma (MSWD=5.5), suggesting its hydrothermal vein mineralization formation in the Mesoproterozoic. In the hydrothermal mineralization of the Bizigou deposit,three mineralization events were identified:Paleoproterozoic disseminated mineralization, Paleoproterozoic vein-type mineralization, and Mesoproterozoic vein-type mineralization. This study indicates the existence of a Mesoproterozoic hydrothermal Cu mineralization event in the Bizigou and Zhongtiao Mountain region combining with the existing data.

Key words: Re-Os dating, "Hu-Bi type" Cu deposits, vein-type mineralization, Mesoproterozoic mineralization, Bizigou Cu deposit,Zhongtiao Mountain

CLC Number: 

  • P618.41
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