龙水金矿成矿物质来源的地球化学研究

GEOCHEMICAL STUDIES ON THE SOURCES OF THE METALLOGENIC MATERIALS IN LONGSHUI ORE FIELD,GAUNGXI

硫同位素、矿物包裹体、单矿物成分以及岩石地球化学特征表明,龙水矿区成矿物质是多源的,既可以来自地层,又可以来自岩浆期后热液。溶金实验结果表明,金主要以Au-Cl络合物形式在地层中活化迁移,Fe_2O,是促使金活化的重要氧化剂。

Accordiong to the geochemical properties of sulphur isotopes, themetallogenic materials of the region arc chiefly derived from the strata and from the magma. Similar conclusion can be obtained by studying thecompositions and fluid inclusions of the individual minerals. The mecha-nism activating and transporting gold from the strata is: Au+Fe^(3+)+2Cl^-→[AuCl_2]^-+Fe^(2+)Fe_2O_3 in the strata is considered as an oxidizing agent for gold in asuitable condition.