Preface. List of Contributors. Introduction. I: Characteristics of Tropically Weathered Terrains. Climate, Geomorphological Environment and Geochemical Dispersion Models (C.R.M. Butt and H. Zeegers). Chemical Weathering (J.-J. Trescases). The Ferruginous Laterites (D. Nahon and Y. Tardy). Soil Formation in Tropicallly Weathered Terrains (Y. Lucas and M. Chauvel). The Chemical Mobility and Transport of Elements in the Weathering Environment (M.R. Thornber). Physical Weathering and Dispersion (C.R.M. Butt). II: Gossan Formation and Gossan Surveys. The Mechanisms of Sulphide Oxidation and Gossan Formation (M.R. Thornber and G.F. Taylor). Gossan and Ironstone Surveys (G.F. Taylor and M.R. Thornber). III: Exploration in Areas of Low to Moderate Relief. Seasonally Humid Tropical Terrains (Savannas) (H. Zeegers and P. Lecomte). Humid Tropical Terrains (Rainforests) (P. Lecomte and H. Zeegers). Semi-Arid and Arid Terrains (C.R.M. Butt). IV: Exploration in Areas of Moderate to High Relief. Dissected Terrains and Tropical Mountains (C.R.M. Butt and H. Zeegers). V: Specific Commodities and Techniques. Diamond Exploration in Tropical Terrains (G.P. Gregory and A.J.A. Janse). Uranium Exploration in Tropical Terrains (F. Bianconi and K. Kogler). The Geochemistry of Gold in Lateritic Terrains (D.J. Gray, C.R.M. Butt and L.M. Lawrance). Heavy Mineral Surveys in Exploration of Lateritic Terrain (G. Friedrich, A. Marker and M. Kanig). VI: Synthesis and Conclusions. Summary and Procedural Recommendations. (H. Zeegers and C.R.M. Butt). Appendix 1: Sample Media used in Geochemical Exploration in Tropically Weathered Environments: Definitions and Use. Appendix 2: Sample Preparation and Analysis. Appendix 3: Profile Nomenclature and Glossary. Author Index. Place Index. Subject Index.