Purification method and application of siliceous rock sample

The invention provides a purification method and application of a siliceous rock sample. By utilizing the physical and chemical properties of impurity minerals or components in the siliceous rock sample, the purpose of impurity removal is achieved by adopting a corresponding physical or chemical method, and the geochemical composition of the siliceous rock is not changed. By utilizing the technical method provided by the invention, light minerals such as dust impurities, organic matters, carbonate minerals, clay minerals, feldspar and the like and heavy minerals such as pyrite and the like in the siliceous rock can be effectively removed, and an experimental foundation is laid for fine geochemical analysis, so that the multiplicity of solutions of siliceous rock cause analysis by utilizing geochemical characteristics can be reduced. The technology can be applied to paleogeography and reservoir evolution research, so that theoretical support and objective basis are provided for oil-gas exploration area selecti