Intergranular solution and mineralization

Based on geological field observations of more than twenty hydrothermal ore deposits, in conjunction with fluid inclusion studies, high temperature and high pressure experiments and elemental geochemistry data, this paper discusses the melt-solution nature of granitic magma and the mechanism of formation of intergranular solutions during cooling and local differentiation of the granitic magma. It is proposed that ore-forming fluids responsible for the ore deposits associated with granites have a close affinity to intergranular solutions. This concept can explain not only the source of such ore-forming fluids, but also the mechanism of autometamorphism in granite bodies and its relationship with mineralization. Thus, the concept of intergranular solution is of great significance in the study of metallogenesis.