{"thcode":61,"term":{"code":699,"name":"isotope geochemistry","parent":695,"scope":"used for both stable isotope geochemistry (to understand chemical fractionation in earth materials and processes) and radiogenic isotope geochemistry (to determine the ages and origins of earth materials)."},"uf":[],"bt":[{"code":695,"name":"geochemistry","parent":639,"scope":"the study of the chemical composition and genesis of earth materials."},{"code":639,"name":"discipline","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[],"rt":[]}