The main ones are Ca2+, Mg2+, K+, Na+, Ba2+, Sr2+, Pb2+, Fe3+, Al3+, Cu2+. There are more than 170 known sulfate minerals. Although they account for only 0.1% of the total crustal weight, gypsum, anhydrite, barite and mirabilite can be enriched into deposits of industrial significance. Sulfate minerals are mostly complex salts, so the symmetry of crystal structure is relatively low, and they mainly belong to monoclinic and orthorhombic systems. Moreover, because most sulfate minerals contain water, the hardness of sulfate minerals is low, generally between 2 and 3.5. In addition, the color is generally colorless and white, the proportion is generally not large, between 2 and 4. The formation of sulfate minerals requires conditions of high oxygen concentration and low temperature, so the surface part is the most suitable place for the formation of sulfate minerals. In this kind of minerals, exogenous origin is far more important than endogenetic origin. Among them, sulfate minerals formed by oxidation of primary metal sulfides account for almost half of the minerals. The sulfate minerals deposited in the basin are mainly water-bearing sulfates of potassium, sodium, calcium, magnesium, barium and aluminium. As for sulfate minerals of endogenous hydrothermal origin, they are mainly anhydrous sulfates such as barium, calcium, strontium and aluminium, which are found in medium-low temperature hydrothermal veins or as products of low-temperature hydrothermal wall rock alteration.