Dissolution of feldspar and pyroxene in Kanto-loam and the evaluation of Goldich's weathering series.:Goldich's weathering series

概要

論文の詳細を見る
Goldich′s weathering series (Goldich, 1938) is consistent with the results of thermochemical calculation on solubility of silicates as a function of partial pressure of carbon dioxide and also the rate of dissolution of silicates experimentally determined.<BR>However, it was found that this weathering series, solubility and dissolution rate of silicates are inconsistent with the rate of dissolution of Ca·Na-feldspar and pyroxene in Kanto-loam. Goldich′s weathering series, solubility and dissolution rate of Ca·Na-feldspar and pyroxene indicate that Ca·Na-feldspar is more stable or similar to Mg-pyroxene in the weathering series. However, Ca·Na-feldspar in the Kanto-loam was suffered more intense weathering than pyroxene. This inconsistency is interpreted in terms of the rapider rate of dissolution of Ca·Na-feldspar than pyroxene in organic ligand-rich soil water in near-surface environment, suggesting that organic acids are important for controlling the dissolution of Ca·Na-feldspar.
資源地質学会の論文