拉尔玛金矿生物-有机质成矿作用

拉尔玛金矿床是秦岭“金三角”中典型的热水矿床。笔者根据拉尔玛地区金矿床中岩石和矿石的常量、微量和稀土元素、同位素年代学的研究 ,结合金与有机质、粘土的关系 ,以及有机质、粘土矿物吸附和释放金的实验 ,提出了硅质岩为金矿矿源层。通过对拉尔玛金矿热水成因硅质岩中分子古生物学的研究 ,指出硅质岩中与金关系密切的生物母源为海生低等菌藻生物。根据金矿床中的生物实体化石、分子化石、金与生物量及有机质之间的相互关系 ,结合生物、有机质成矿模拟的实验研究 ,确认拉尔玛金矿床为生物 -有机成矿作用

The Mineralization of Organism and Organic Matter in the Laerma Gold Deposit

The Laerma gold deposit is the hydrothermal type deposit in trigonometric area of gold deposit of the Western Qinling Mountains. Geological and geochemical studies and experiments on mineralization indicate that the hydrothermal chert is the source bed of the Laerma gold deposit. Molecular paleontology in thermal chert in Laerma gold deposit shows that the organic precursors intimately associated with gold are marine bacteria and algae. The article studies the amount of bacterial and algal microfossils, molecular fossils, the relationship of gold content with organic precursors and organic material and simulation experiments on mineralization of organism and organic matter. All the research results indicate that the Laerma gold deposit is the mineralization of organism and organic matter.