Interaction of Gold with Sulfide Surface As a Factor of Its Concentration in Hydrothermal Ore Formation

摘要

In recent years, substantial progress has been achieved in systematization of internal relationships between different states of the implicit Au in sulfide minerals not only on the basis of up-to-date analytical methods but also from the theoretical standpoint of crystal chemistry. It has been shown that perfection of the matrix structure of the host mineral and the homogeneity of Au distribution [3] serve as criteria of the structural state of gold. The concentration of Au in extrastructure sites is considered in terms of the endocryptic concept (localization of atoms with participation of crystal lattice defects). The decrease in perfection of pyrite crystals along with a decrease in their dimensions from 1.5 to 0.3 mm leads to an increase in the content of extrastructure Au from 22 to 77%.