Quantification of Microscopic Porous Networks By Image Analysis and Measurements of Permeability in the Soultz-Sous-Forêts Granite (Alsace, France)

摘要: Natural or experimental fluid—rock interactions are often difficult to model theoretically because of the variability effective exchange surface area between solid and fluid. The freshest fades Soultz granite has been used previously for leaching experiments (Azaroual, Fouillac Pauwels, 1993): a piece core was crushed leached with distilled water at 140°C, concentration dissolved elements measured in cell outflow. computation distribution chemical species aqueous solution, their concentrations activities EQ 3/6 software package (Wolery Daveler, 1990), requires that rock fluid is known. In order match results calculations results, 0.012 m2 g−1 required, whereas by BET (nitrogen adsorption) 0.6 g −1.