Volume 44 Issue 6
Jun.  2019
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Zhao Xiaoyan, Yang Zhusen, Zhang Xiong, Pei Yingru, 2019. In Situ Trace Element Analysis of Pyrite from Bangbu Orogenic Gold Deposit and Its Metallogenic Significance. Earth Science, 44(6): 2052-2062. doi: 10.3799/dqkx.2018.361
Citation: Zhao Xiaoyan, Yang Zhusen, Zhang Xiong, Pei Yingru, 2019. In Situ Trace Element Analysis of Pyrite from Bangbu Orogenic Gold Deposit and Its Metallogenic Significance. Earth Science, 44(6): 2052-2062. doi: 10.3799/dqkx.2018.361

In Situ Trace Element Analysis of Pyrite from Bangbu Orogenic Gold Deposit and Its Metallogenic Significance

doi: 10.3799/dqkx.2018.361
  • Received Date: 2018-08-13
  • Publish Date: 2019-06-15
  • The Bangbu deposit is the only large orogenic gold deposit that is being exploited with the highest degree of research in the Yurlung-Zangbo suture zone. In order to understand the source, transportation and precipitation of Au in the Bangbu deposit, in situ microanalysis technique was used to obtain the trace elements compositions of Au-bearing pyrite from different generations. In situ trace elements results show that the siderophile elements Co and Ni mainly enter the lattice of pyrite to substitute Fe while As and Se substitute S in the form of isomorphism. Gold is distributed evenly in different generations of pyrite in the form of nanoparticles. The Co/Ni ratios of pyrite from three generations of Au-bearing quartz veins are all less than 1 which preserve the information of pyrite of the surrounding rocks indicating a kind of sedimentation or sedimentation-reformation origin. As and Se play important roles in the migration and accumulation of Au as Au has obvious positive correlation with As and Se.

     

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