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我国中南、华东地区广泛出露下寒武黑色碳质岩系,是一套浅海相沉积岩,该地层含有多种有用元素,例如:V、Ni、Au、Ag、Cu、Y、Pt、Pd、P、Zn、Mo等。经过风化淋滤,形成多种表生矿物,其颜色鲜艳,形态特别,常呈葡萄状、皮壳状、毛发状、胶态状等。表生矿物结晶细小,物相复杂,分离困难,而且极不稳定,长期以来这类表生矿物研究不深入,错误结论十分多。
The low Cambrian black carbonaceous rock series are widely exposed in central and southern China and eastern China. They are a set of shallow marine sedimentary rocks that contain many useful elements such as V, Ni, Au, Ag, Cu, Y, Pt, Pd, P, Zn, Mo and the like. After weathered leaching, forming a variety of superficial minerals, its bright colors, special shape, often grapes, crusts, hair-like, colloidal and so on. The superficial minerals have small crystals, complex phases, difficult separation, and are extremely unstable. For a long time, the study of these superficial minerals has not been thoroughly studied and the conclusions are quite wrong.