Definitions for "geochemistry"
The study of the chemical composition of, and of actual or possible chemical changes in, the crust of the earth.
geological chemistry. The study of materials and chemical reactions in rocks, minerals, magma, seawater, and soil.
The study of the distribution and amounts of the chemical elements in minerals and rocks. Geochemistry concerns how these elements circulate in nature on the basis of the properties of their atoms and ions.
Keywords:  geologist