A New Model of Thermal and Physicochemical Dynamics for Volcanogenic Epithermal Deposits (Asacha Deposit, Kamchatka)

摘要

One of the significant factors of the features of vol-canogenic porphyry deposits [1, 9] is thermal loss into wall rocks. In this case, the major constituents of mineral zoning in real ore-forming systems appear to have originated at the nonstationary stage of thermal evolution. Estimating the substantiveness of the available quantitative model and the capability for adequate description of vertical and lateral zoning of ore and wall-rock alteration, it can be noted that the dynamics of the phase fluid state in local areas of the hydrother-mal system is the determining factor in heterophase mass transfer of components. The selection of Gibbs or Helmholtz thermodynamic potentials of minimization is significant in relation to the adequacy of the inferred approximation with the structural conditions of infiltration (jointed porous rocks or open joints) [6].