太阳顶群热水成因的硅质岩作为拉尔玛金矿矿源层的研究  

SILICEOUS ROCKS OF THERMAL WATER ORIGIN IN TAIYANGDING GROUP AS THE SOURCE BED OF LAERMA GOLD DEPOSIT

作　　者：林丽[1] 殷鸿福[1] 张本仁[1] 朱利东[1] 

机构地区：[1]成都理工学院地质学系,中国地质大学

出　　处：《成都理工学院学报》1996年第2期1-6,共6页Journal of Chengdu University of Technology

基　　金：国家自然科学基金

摘　　要：通过对拉尔玛金矿床中金与有机碳的关系分析及有机质、粘土矿物吸附和释放金的实验研究，结合岩（矿）石中金的浸出率与有机碳含量的相关分析，岩（矿）石的微量元素和稀土元素Ｑ型聚类分析，得出结论：与硅质岩相比，板岩能提供的金是微不足道的。硅质岩中的活性金远远高于板岩，在成矿过程中易于迁移出来参与成矿；板岩中的金多为惰性金，难于活化和提供金源。大阳顶群热水成因的硅质岩，在沉积时不仅为当时的海水提供了大量的金源，而且成岩后构成了拉尔玛金矿床主要的矿源层。The Laerma gold deposit occurs in the Cambrian Taiyangding Group of the Southern Belt of West Qinling. According to the relative analysis of gold and organic carbon in rocks and ores, the results of gold absorbing and releasing experiments of organic matter and clay minerals and Q-mode cluster analysis of the microelement composition and the composition of rare earth elements of rocks and ores, the paper indicates that the contribution of slates to gold metallogenesis is trivial compared with that of siliceous rocks. The mobility of gold is much higher in siliceous rocks than in slates,which makes gold in the former ready to be remobilized to contribute in the metallogenesis, whereas gold in the slates is mainly inert and difficult to be remobilized. Thus. these siliceous rocks has been proved to be of thermal water origin,which not only yielded gold material to the ancient sea, but also constituted the main source bed of the Laerma gold deposit during petrogensis.

关 键 词：硅质岩 热水成因 矿源层 金矿床 

分 类 号：P618.510.2[天文地球—矿床学]