Volume 39 Issue 3
May  2020
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Zhang Haikun, Hu Peng, Cao Liang, Cheng Xiang, Zhan Mingguo, Pan Luozhong, Dai Yu, Pan Beihong. Characteristics of mineralization fluids and mineralization material sources of the Sedex-type Dairi Pb-Zn ore concentration area in Indonesia: Evidence from fluid inclusions and isotopic geochemistry[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 170-178. doi: 10.19509/j.cnki.dzkq.2020.0318
Citation: Zhang Haikun, Hu Peng, Cao Liang, Cheng Xiang, Zhan Mingguo, Pan Luozhong, Dai Yu, Pan Beihong. Characteristics of mineralization fluids and mineralization material sources of the Sedex-type Dairi Pb-Zn ore concentration area in Indonesia: Evidence from fluid inclusions and isotopic geochemistry[J]. Bulletin of Geological Science and Technology, 2020, 39(3): 170-178. doi: 10.19509/j.cnki.dzkq.2020.0318

Characteristics of mineralization fluids and mineralization material sources of the Sedex-type Dairi Pb-Zn ore concentration area in Indonesia: Evidence from fluid inclusions and isotopic geochemistry

doi: 10.19509/j.cnki.dzkq.2020.0318
  • Received Date: 27 Jan 2019
  • The Dairi Pb-Zn ore concentration area, hosted by shale and displaying Sedex-type Pb-Zn mineralization of giant scale, is located in northwestern Sumatra, Indonesia.Systematic analysis of fluid inclusions and H, O, S and Pb isotopes was performed to probe its genesis.The results show that (1) the homogenization temperatures range from 189 to 315℃, with a peak at 220-240℃, indicating medium temperature for mineralization; (2)values of δ18OV-SMOW vary from +5.9‰ to +19.5‰, with an average of +16.6‰, implying a magma water-dominated mineralization fluid with minor addition of shallow water; (3)pyrites have positive δ34SCDT values from +25.49‰ to +26.36‰; (4)lead isotopes possess high μ values of 9.92-10.17(averaging 10.04) and ω values of 38.06-40.51 (averaging 39.26).It is indicated that the ores from Dairi formed at medium temperatures, having a fluid source dominated by magma water with minor addition of shallow water, a sulfur source comparable to ocean water and a single lead source from the crust.

     

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