滇黔桂金三角区微细浸染型金矿床的盆地流体成因模式  

BASIN FLUID GENETIC MODEL OF SEDIMENT-HOSTED MICRODISSEMINATED GOLD DEPOSITS IN THE GOLD-TRIANGLE AREA BETWEEN GUIZHOU, GUANGXI AND YUNNAN

作　　者：刘建明[1] 刘家军[2] 

机构地区：[1]中国科学院矿物资源探查研究中心 [2]中国科学院地球化学研究所,贵阳550002

出　　处：《矿物学报》1997年第4期448-456,共9页Acta Mineralogica Sinica

基　　金：中国科学院矿床地球化学开放研究实验室资助

摘　　要：对滇黔桂金三角区二叠纪和三叠纪沉积岩系中微细浸染型金矿床系统的组构学和矿床地球化学研究表明，这类矿床具有大量的同生沉积-准同生成岩阶段的成因特征，是在沉积物沉积-成岩期间就已经成矿。硫、铅、碳等稳定同位素以及稀土元素和其它微量元素均一致显示，矿石及其主岩具有统一的物源并经历了一致的地质作用过程。氢氧和碳氧同位素组成反映了沉积盆地流体的特征。沉积有机质在成矿过程中起了重要的作用。综合各方面的研究，作者提出了全新的盆地流体成因模式。In southwestern China,over hundreds of ore deposits and occurrences of sediment-hosted micro-disseminated gold were discovered, about twenty of which have been well documented.At the present time, the widely accepted genetic interpretation lies upon an epigenetic reworking and reenriching process by hydrothermal solutions, on the basis of gold pre-enrichment as a source bed during sedimentation of the host rocks. Systematical research has been done on the geology, fabrics and geochemistry of ores and their host rocks. It is found that there is a lot of genetic fea tures resulting from sedimentary-diagenetic processes, indicating that the gold ore was formed from basin fluid during sedimentary-diagenetic stages.

关 键 词：金矿床 浸染型矿床 盆地 液包体 成因模式 

分 类 号：P618.510.1[天文地球—矿床学] P618.510.4[天文地球—地质学]