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Simulating experiment on the enrichment of precious metals in Lower Cambrian black shale series of Hunan and Guizhou provinces

机译:湘黔地区下寒武统黑色页岩系列中贵金属富集模拟实验

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摘要

Adsorption experiments were made at room temperature and neutral pH value on different types of minerals associated with the Lower Cambrian black shale series polymetallic layers in Hunan and Guizhou provinces on nanometer-sized Pt colloids and PtCl4 2−-bearing ionic solutions with an attempt to constrain the relationship between the different types of minerals in the polymetallic layers and the enrichment of platinum group elements (PGEs). Experimental results showed that the different types of minerals show strong selectivity to the adsorption of nanometer-sized Pt colloids and PtCl4 2−-bearing ionic solutions. Metallic sulfides, organic matter and clay minerals are the strong adsorbents of PGEs, while quartz, albite, muscovite and other silicate minerals show a week adsorbility to both of them. This phenomenon is well consistent with the geological fact that metallic sulfides, organic matter and clay minerals in the polymetallic layers of the black shale series are the major carrier minerals of PGEs, giving a thorough explanation to the mechanism of enrichment of previous metal elements. Adsorption may be a principal mechanism of enrichment of precious metal elements under lower temperature conditions. The presence of the aforementioned strong adsorbents is the good geochemical barriers for the enrichment of PGEs.
机译:在室温和中性pH值下,对湖南和贵州省下寒武统黑色页岩系列多金属层上不同类型的矿物在纳米级Pt胶体和PtCl4上的吸附实验 2 − -试图限制多金属层中不同类型矿物与铂族元素(PGE)富集之间的关系。实验结果表明,不同类型的矿物对纳米级Pt胶体和含PtCl4 2-的离子溶液的吸附具有较强的选择性。金属硫化物,有机物和粘土矿物质是PGE的强吸附剂,而石英,钠长石,白云母和其他硅酸盐矿物质对PGE都具有一周的吸附性。这种现象与地质事实完全一致,即黑色页岩系列多金属层中的金属硫化物,有机质和粘土矿物是PGE的主要载体矿物,为先前金属元素的富集机理提供了详尽的解释。吸附可能是在较低温度条件下富集贵金属元素的主要机理。上述强吸附剂的存在是富集PGE的良好地球化学障碍。

著录项

  • 来源
    《Chinese Journal of Geochemistry》 |2011年第3期|p.375-381|共7页
  • 作者单位

    The State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;

    The State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;

    The State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hunan; Guizhou; Lower Cambrian; black shale; adsorption; precious metal; enrichment process;

    机译:湖南;贵州;下寒武统;黑页岩;吸附;贵金属;富集过程;
  • 入库时间 2022-08-17 13:11:17

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