The Chemistry of Weathering (Nato Science Series C:, 149)

Several important developments in our understanding of the chemistry of weathering have occurred in the last few years: 1. There has been a major breakthrough in our understanding of the mechanisms controlling the kinetics of sil icate dissolution, and there have been major advances in computer modeling of weathering processes. 2. There has been a growing recognition of the importance of organic solutes in the weathering process, and hence of the inter-relationships between mineral weathering and the terrestrial ecosystem. 3. The impact of acid deposition ("acid rain") has been widely recognized. The processes by which acid deposition is neutral ized are closely related to the processes of normal chemical weathering; an understanding of the chemistry of weathering is thus essential for predicting the effects of acid deposition. 4. More high-qual ity data have become available on the chemical dynamics of smal I watersheds and large river systems, which represent the integrated effects of chemical weathering. Front Matter....Pages i-viii Chemical Models of Weathering in Soils....Pages 1-18 Multicomponent Solid Solutions for Clay Minerals and Computer Modeling of Weathering Processes....Pages 19-34 Dissolution Mechanisms of Pyroxenes and Olivines During Weathering....Pages 35-53 The Effects of Complex-Forming Ligands on the Dissolution of Oxides and Aluminosilicates....Pages 55-74 Kinetic Study of The Dissolution of Albite with a Continuous Flow-Through Fluidized Bed Reactor....Pages 75-96 Interstratified Clay Minerals and Weathering Processes....Pages 97-118 Formation of Secondary Iron Oxides in Various Environments....Pages 119-120 Physical Conditions in Alunite Precipitation as a Secondary Mineral....Pages 121-141 This Planet is Alive —Weathering and Biology, A Multi-Facetted Problem —....Pages 143-160 Solubilization, Transport, and Deposition of Mineral Cations by Microorganisms - Efficient Rock Weathering Agents....Pages 161-173 Chemical Weathering and Solution Chemistry in Acid Forest Soils: Differential Influence of Soil Type, Biotic Processes, and H + Deposition....Pages 175-195 Proton Consumption Rates in Holocene and Present-Day Weathering of Acid Forest Soils....Pages 197-209 Equilibrium and Disequilibrium Between Pore Waters and Minerals in the Weathering Environment....Pages 211-229 Hydrogeochemical Constraints on Mass Balances in Forested Watersheds of the Southern Appalachians....Pages 231-247 Past And Present Serpentinisation of Ultramafic Rocks; An Example from the Semail Ophiolite Nappe of Northern Oman....Pages 249-275 Manganese Concentration Through Chemical Weathering of Metamorphic Rocks Under Lateritic Conditions....Pages 277-291 River Chemistry, Geology, Geomorphology, and Soils in the Amazon and Orinoco Basins....Pages 293-316 Back Matter....Pages 317-324 Proceedings of the NATO Advanced Research Workshop, Rodez, France, July 2-6, 1984