Journal of Jilin University(Earth Science Edition) ›› 2020, Vol. 50 ›› Issue (5): 1582-1598.doi: 10.13278/j.cnki.jjuese.20200092

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Pyrite Trace Element Composition and S-Pb Isotope Characters of the Dabaiyang Gold Deposit, Hebei Province

Tao Lixin1, Zhen Shimin2,3,4, Bai Haijun1, Wang Jiang4, Wang Dazhao5, Zha Zhongjian4   

  1. 1. The Third Geological Brigade of Hebei Bureau of Geology and Mineral Resources, Zhangjiakou 075000, Hebei, China;
    2. Development and Research Center, China Geological Survey, Beijing 100037, China;
    3. Mineral Exploration Technical Guidance Center, Ministry of Natural Resources, Beijing 100083, China;
    4. School of Earth Science and Resources, China University of Geosciences(Beijing), Beijing 100083, China;
    5. State Key Laboratory of Nuclear Resource and Environment, East China University of Technology, Nanchang 330013, China
  • Received:2020-04-17 Online:2020-09-26 Published:2020-09-29
  • Supported by:
    Supported by Project of China Geological Survey (DD20190166,DD20190570,DD20160071)

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Abstract: The Dabaiyang gold deposit is located in the Zhangjiakou district of the north margin of the North China craton. It is a middle-scale gold deposit. The ore bodies are hosted in the Huajiaying Formation and Jiangouhe Formation of the Archean Sanggan Group, and controlled by faults and folds with general strikes of north-northwest. The ore types are gold-bearing quartz vein type and altered rock type. The main minerals are magnetite, hematite, pyrite, galena, sphalerite, chalcopyrite, bornite, native silver, native gold, electrum,and tellurides. Four mineralization stages are recognized, i.e. quartz-k-feldspar stage, quartz-pyrite stage, quartz-sulfides stage, and quartz-carbonate-sulfate stage. The δ34SV-CDT values of sulfide range from -16.2‰ to -10.5‰, which are resulted from the highly oxidizing ore-forming fluids. The 206Pb/204Pb, 207Pb/204Pb,and 208Pb/204Pb values are 16.762-17.293, 15.350-15.463,and 36.777-37.328, respectively. The stable isotope compositions indicate that the ore metals were mostly derived from magmatic fluid. The contents of trace elements in pyrite are low, and mostly in the pyrite lattice. The low Co and Ni concentrations suggest that the pyrite precipitated from magmatic hydrothermal fluid. The amphibolite of the Sanggan Group provides a part of materials for ore-forming fluids, an important source bed. The Dabaiyang gold deposit is a magma-related hydrothermal deposit, which experienced initial gold mineralization in the Devonian and overprinting during the Jurassic-Cretaceous, which also resulted in the large amounts of gold deposits in the Zhangjiakou Xuanhua district.

Key words: Dabaiyang gold deposit, S-Pb isotope, pyrite trace element composition, magmatic hydrothermal gold deposit, northern margin of North China craton

CLC Number: 

  • P618.51
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