Book excerpt: The field of geochemistry involves study of the chemical composition of the Earth and other planets, chemical processes and reactions that govern the composition of rocks and soils, and the cycles of matter and energy that transport the Earth's chemical components in time and space, and their interaction with the hydrosphere and the atmosphere. This book presents leading research in the field. Preface; Implications of complex glacial deposits for till geochemical exploration: Examples from the central Fennoscandian ice sheet; Geochemical modelling of concentrated mine waters: A comparison of the Pitzer ion-interaction theory with the ion-association model for the study of melanterite solubility in San Telmo mine (Huelva, Spain); Geochemical Anomalies Connected with Great Earthquakes in China; Structural Characterisation of Kerogen by Ruthenium Tetroxide Oxidation; Mucous Macroaggregates in the Northern Adriatic; Geochemical signals and paleoclimate changes in a 16,000 14C year sedimentary record from Lake Gucheng, eastern China; Biogeochemical evaluation of soil covers for base metal tailings, Ag-Pb-Zn Cannington mine, Australia; The Geochemical Characteristics of Rare Earth Elements in Granitic Laterites in Hainan Island, China; Index.