Experimental Determination of the Redox Potential of the Rock- Water System. 2. The Granite-Water System at 400-450 deg C and 1 kbar

摘要

Equilibrium H_2(g) fugacity as a characteristic of the redox potential of the crustal rock-water system was examined experimentally to test the results of our earliercomputer simulation of these systems [1-7]. The published results of the computer simulations pertained to invariant rock-water systems (Fig. 1) and were calculated without allowance for the differences between the interaction rates of discrete minerals of the rock with the aqueous solution. In modeling natural systems by the simulation of the equilibrium state of closed systems, it was implicitly assumed that the duration of contact interaction between minerals of the rock and the aqueous solution is always long enough for the whole rock mass considered in a given case (in accordance with the selected ratios of the reacting masses of rock and water, R/W) to react with the aqueous solution.