91.67.-y Geochemistry (see also 92.20.Cm Chemistry of the ocean; 92.40.Bc Chemistry of fresh water; 92.60.Ls Ion chemistry of the atmosphere; 91.62.Kt, 91.80.Kc, and 92.20.C- in Geophysics Appendix)
- 91.67.Bc Geochemical modeling
- 91.67.De Reactions and phase equilibria (see also 91.40.Qa-in Volcanology)
-
91.67.Fx Geochemical processes
(1)
- 91.67.Gy Chemical composition
- 91.67.Jk Geochemistry of hydrothermal systems (see also 91.40.Ge-in Volcanology; 92.05.Lf-in oceanography); Physics and chemistry of magma bodies, see 91.40.La
- 91.67.Nc Geochemical cycles (see also 92.20.Sg Biogeochemical cycles-in oceanography; 92.60.hn-in meteorology; 92.30.Gh-in Geophysics Appendix)
- 91.67.Pq Major and trace element geochemistry (see also 92.20.Wx Trace elements-in chemical and biological oceanography)
- 91.67.Qr Radiogenic isotope geochemistry (see also 91.65.Dt Isotopic composition-in Mineralogy and petrology; 92.20.Td Radioactivity and radioisotopes-in oceanography)
- 91.67.Rx Stable isotope geochemistry (see also 91.65.Dt Isotopic composition-in Mineralogy and petrology)
- 91.67.St Fluid and melt inclusion geochemistry
- 91.67.Ty Sedimentary geochemistry (see also 91.50.Jc-in marine geology; 91.65.Ti-in Mineralogy and petrology; 92.10.Wa and 92.20.Vn-in oceanography; 92.40.Gc-in hydrology; 91.80.Wx-in Geophysics Appendix)
- 91.67.Uv Organic and biogenic geochemistry
- 91.67.Vf Low-temperature geochemistry