風化における物質移動のシミュレーション

概要

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The present studies dealt with the changes in the chemical properties of minerals and rocks during weathering by computer simulation. The formation of secondary minerals and the behavior of chemical species in aqueous solution were studied by geochemical simulation which is an analytical method of rock decomposition. The process of chemical weathering can be simulated as a the reaction occurring between rock-forming minerals and aqueous solution. The changes in the amount (grams) of chemical species/1000g of solution (M) and the degree of saturation of secondary minerals, shown in Fig. 5, 6, 7 and 8 were calculated as increments of the reaction progress (ξ) in the hydrolysis of starting materials. The changes in the values of the chemical parameters were complex. In the case of granite dissolution, the formation of saturated mineral zoning by weathering is represented by the reaction area (10cm^2) in the microprofile (Fig.9). Satisfactory results with the changes in physical properties were obtained in the alteration to laterite. But several problems exist in many application of geochemical simulation. Because the changes in mechanical, mineralogical, and petrological properties during weathering cannot be explained by this simulation.
日本粘土学会の論文
1994-12-30