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CHENG Shunbo, WU Zhihua, LIU Zhongpeng, LIU Asui, MA Liyan, LU Youyue. Sulfur and lead isotope geochemistry of the Liushutang lead-zinc deposit in Hu'nan Province and its significance[J]. Geological Bulletin of China, 2017, 36(5): 846-856.
Citation: CHENG Shunbo, WU Zhihua, LIU Zhongpeng, LIU Asui, MA Liyan, LU Youyue. Sulfur and lead isotope geochemistry of the Liushutang lead-zinc deposit in Hu'nan Province and its significance[J]. Geological Bulletin of China, 2017, 36(5): 846-856.
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Sulfur and lead isotope geochemistry of the Liushutang lead-zinc deposit in Hu'nan Province and its significance

  • 1.

    Wuhan Center of Geological Survey, CGS, Wuhan 430205, Hubei, China

  • 2.

    Research Center of Granitic Diagenesis and Mineralization, CGS, Wuhan 430205, Hubei, China

  • 3.

    No. 417 Geological Party, Hunan Bureau of Geology and Mineral Resources Development, Hengyang 421001, Hu'nan, China

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Received Date:  03 April 2016
Revised Date:  12 August 2016
Publish Date:  25 May 2017
    Abstract

  • The discovery of the Liushutang lead-zinc deposit is one of the major breakthroughs of prospecting in the Nanling metal-logenic belt in recent years.The lead-zinc lodes are strictly controlled by the shattered fracture zones along the western margin of Hengyang basin.Field observation shows that the related mineralization can be divided into three stages of quartz-pyrite, quartzsphalerite-galena and barite.In this paper, systematic research on S, Pb isotopes based on different stages of ores were conducted to explain the origin of ore-forming materials and ore genesis.The result shows that sulfur isotopes of 17 sulfide samples vary in a wide range (δ34S value being-12.8‰~4.6‰) with a dynamic evolution of gradual increasing of δ34S values from early to late.This can be probably explained by a mixing process of organic sulfur (~-13‰) and magmatic sulfur (~5‰).Sulfur of latest barite ore (δ34S is 14.7‰~24.4‰) might have been provided by the strata sulfate.206Pb/204Pb, 207Pb/204Pb, 208Pb/204Pb ratios of 13 sulfide ore samples vary in the range of 18.627~18.942, 15.670~15.804 and 38.366~38.912, with the average value being 18.747, 15.705 and 38.614, respec-tively.These values are very similar to values of Pb isotopes of magmatic feldspar in southern Hu'nan and also have weak linear rela-tion with Pb isotopes of regional Cambrian strata, suggesting that ore materials might have mainly originated from magmatic pluton in the depth, and subordinately from the Cambrian strata.Based on the above results and geological evidence, the authors put forward a model of magma-related hydrothermal mineralization with multiple sources of ore-forming materials, which may be suitable for explaining the ore genesis of the Liushutang deposit.

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