Foreword. Glossary. 1. Commodity Review. Introduction. Geological association. Technical applications and industrial uses. Marketing and investment role. Strategic role. 2. Controls on Sulphide Solubility. Introduction. Predicted Controls. Experimental Studies. Application to Natural Rocks. 3. Pyroxenes. Chemical classification. Pyroxene immiscibility and exsolution. Electron microprobe analysis of exsolved pyroxenes. 4. Phase Chemistry of Mafic Magmas: Primary and Secondary Processes. Silicate phase fractionation. Stable isotope geochemistry. PGE mineralogy. 5. Mining Geology of the Principal Deposits. Bushveld Complex. Sudbury nickel irruptive. Komatiite-hosted nickel sulphides. PGE deposits in the USSR and China. Stillwater Complex. 6. Target Selection. Geological environments. Intrusions in cratonic areas. Bodies emplaced during orogenesis. 7. Exploration Guidelines. Analytical techniques. Lithogeochemistry of the Bushveld Complex. Application of lithogeochemistry. PGE concentrations in magmatic sulphide ores. Primary and secondary dispersion. Remote sensing and geophysical techniques. 8. Evaluation Guidelines. Geostatistical ore reserve evaluation. Economic modelling. 9. Summary and Conclusions. Exploration and investment climate. Chemical factors. Primary PGE associations and controls on mineralization. Exploration guidelines. Bibliography. Index.