低温开放体系中金矿成矿初步模拟实验

THE SIMULATING EXPERIMENTS OF GOLD MINERALIZATION IN LOW TEMPERATURE AND OPEN SYSTEM

在对贵州赋存于沉积岩中的微细浸染型金矿床地质地球化学和元素组合研究基础上，并与卡林金矿床对比后拟定的低温开放体系中金矿成矿的初步模拟实验表明，该体系中元素主要是由构造动力驱动从高压区向低压区迁移，并在迁移过程中按元素地球化学性质和成矿条件变化形成沉淀分带；金氯络合物的分解和成矿物质的沉淀与黄铁矿和有机质明显有关；元素的变化趋势呈非简单线性关系，有机质受到热变质作用。

The sedimentary rocks hosted micrograined and disseminated gold deposits in Guizhou were formed by complex geological and geochemical processes in low temperature and open system. The results from simulating experiments of gold mineralization in low temperature and open system show that the migration direction of elements in the system is mainly from high pressure areas to low pressure areas caused by sturctural movement. During the migration process, the zoning of elements formed due to the difference of geochemical characters of each element and metallogenetic conditions at different strutural positions. Deposition of gold from the complex of gold chlorine is closely related to pyrite and organic matter. Organic matter is reworked because of thermal mtamorphism and the metamorphic intensity of organic matter controls the relationship between gold deposition and organic matter.