Titlebook: Organic Acids in Geological Processes; Edward D. Pittman (Consulting Petrologist-Sediment Book 1994 Springer-Verlag Berlin Heidelberg 1994

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Role of Soil Organic Acids in Mineral Weathering Processes,e compounds are relatively refractory, and are broken down only slowly by microorganisms. Low-molecular-mass acids (e.g., acetic, oxalic, formic) exist in dynamic balance: they are rapidly produced and consumed by microorganisms. Their concentrations may be quite high where rapid decomposition of pl

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Chemistry and Mechanisms of Low-Temperature Dissolution of Silicates by Organic Acids,ficance in a particular environment will depend on a variety of geo-chemical parameters. Organic acids in low-temperature aqueous systems can complex metals and metalloids in solution, thereby increasing their solubility and mobility. Organic acids are also implicated in mineral-surface interactions

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Comparison and Evaluation of Experimental Studies on Dissolution of Minerals by Organic Acids, focused on feldspar dissolution by water-soluble organic acids. It has been proposed that simple carboxylic acids (e.g., acetic and oxalic) may complex with aluminum and increase the solubility and dissolution kinetics of feldspar. This would provide a mechanism for mobilizing aluminum and creating

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Metal Transport in Ore Fluids by Organic Ligand Complexation,ears. As a reductant or oxidant, organic matter may function as an active ore-forming agent up to magmatic temperatures, however, most other roles for organic matter, including metal complexation, are limited to less than about 200 °C..Metal-humate and metal-fulvate complexes probably contribute sig

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Geochemical Models of Rock-Water Interactions in the Presence of Organic Acids,nce of inorganic-organic interactions in rock-water systems. Geo-chemical modeling provides insight into the role of these organic constituents in aqueous sedimentary environments by .. In many cases, carefully designed geochemical models allow conflicts to be resolved among differing experimental r

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Organic Acids and Carbonate Stability, the Key to Predicting Positive Porosity Anomalies,in its simplest form, this sequence of carbonate reactions with increasing thermal exposure is: (1) formation of early carbonate cements that preserve intergranular volume (IGV); (2) dissolution of early carbonate cements, enhancing porosity and resulting in positive porosity anomalies; (3) formatio