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贵州遵义和湖南张家界黑色岩系中的矿物组合非常复杂,用X射线衍射仪分析并结合前人的研究成果,显示其中的硫化物矿物、粘土矿物和有机质含量较高;经破碎和分选流程对样品进行处理后,用ICP-MS方法测定了黑色页岩和分选后样品中的铂族元素含量,对贵州遵义和湖南张家界黑色岩系中的铂族元素赋存特征进行研究,结果表明:贵州遵义和湖南张家界的黑色页岩系中赋存高含量的铂族元素,且含量表现较高的稳定性;低温氧化条件下,铂族元素的化学活动性足以使之以相当规模活化、迁移并在还原条件下沉淀富集;经强风化淋滤作用,富含碳硫钼矿黑色页岩中铂族各元素含量都有不同程度的降低;绝大部分的铂族元素富集于黑色页岩的有机质和黄铁矿中;铂族元素的分布模式具规律性,铂族元素的明显分异说明此黑色页岩的分布模式不具有地外物质的特征。
The mineral assemblages in the black rock series of Zunyi, Guizhou and Zhangjiajie, Hunan Province are very complex. The analysis of X-ray diffraction and the previous research results show that the sulfide minerals, clay minerals and organic matter content are high. After the crushing and sorting process After the samples were treated, the contents of PGs in black shale and sorted samples were determined by ICP-MS, and the occurrence characteristics of PGs in black shale of Zunyi, Guizhou Province and Zhangjiajie, Hunan Province were studied. : Zengyi, Guizhou and Zhangjiajie, Hunan, the black shale line in the high content of platinum group elements, and the content showed high stability; low temperature oxidation conditions, the chemical activity of platinum group elements is sufficient to make it a considerable scale activation, Migrated and precipitated and enriched under reducing conditions. The content of each element of the platinum group in the black shale that is rich in carbon, sulfur and molybdenum ore all decreased to different extents after intensive weathering and leaching. Most of the platinum group elements were enriched in black The organic matter and pyrite in shale. The regularity of the distribution pattern of the platinum group elements and the obvious differentiation of the platinum group elements indicate that the distribution pattern of this black shale does not have the characteristics of extra-terrestrial material.