Based on the characters of structure, land form, hydrogeology, water environment, rock and mineral geochemistry, and so on, this paper has studied the origin of the distribution of high-arsenic water.

According to research of mineralogy, petrology and geochemistry, we discuss kaolin mineral composition, chemistry composition, and change rules and origin of Datong coal series.

The exploration geochemistry play a decisive role in discovering the ore guide of prospecting, ascertaining the genetic types of mineral deposit and evaluating the foreground of prospecting.