WATER-ROCK INTERACTION THERMODYNAMIC MODELING WHILE HYDROTHERMAL EXPOSURE ON THE BAZHENOV FORMATION ROCKS

In: Moscow University Bulletin. Series 4. Geology, Heft 3, S. 55-59

Abstract

Equilibrium mineral assemblages at temperatures from 50 °C to 350 °C and pressure of saturated water vapor were established by the thermodynamic modeling of hydrothermal reaction on the Bazhenov Formation rocks. The calculation results show that the mineral parageneses vary slightly with the temperature increase: for zeolites stilbite-laumontite-wairakite row is typical, kaolinite is replaced by montmorillonite and/or albite, pyrite — by pyrrhotite, calcite — by dolomite, brannerite — by uraninite. The simulation results are confirmed by experimental data.