{"thcode":61,"term":{"code":695,"name":"geochemistry","parent":639,"scope":"the study of the chemical composition and genesis of earth materials."},"uf":[],"bt":[{"code":639,"name":"discipline","parent":1,"scope":null},{"code":1,"name":"Marine Realms Information Bank (MRIB) keyword categories","parent":null,"scope":null}],"nt":[{"code":696,"name":"bedrock geochemistry","parent":695,"scope":"the study of the chemical composition and genesis of earth materials within the lithospere."},{"code":697,"name":"biogeochemistry","parent":695,"scope":"the study of chemical cycling between the biosphere and lithosphere (or other earth \"spheres\")."},{"code":698,"name":"groundwater geochemistry","parent":695,"scope":"the study of the chemical composition and evolution of groundwater."},{"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)."},{"code":700,"name":"sediment geochemistry","parent":695,"scope":"the study of the chemical composition and cycling of sedimentary systems."}],"rt":[]}