滇西上芒岗红色粘土型金矿床金的特征  

GOLD CHARACTERS OF THE SHANGMANGGANG RED CLAY TYPE GOLD DEPOSIT, WESTERN YUNNAN

作　　者：饶文波[1] 高振敏[1] 杨竹森[1] 罗泰义[1] 李红阳[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学开放研究实验室,贵阳550002

出　　处：《矿物学报》2001年第2期259-264,共6页Acta Mineralogica Sinica

基　　金：中国科学院重大项目A(KZ 95 1 A1 40 4 0 2 ) ;国家自然科学基金项目 (批准号 :49873 0 2 1)

摘　　要：通过化学分析法、X射线衍射和粒度分级、金的浸出实验 ,对上芒岗红色粘土型金矿床进行研究 ,发现矿石矿物由褐铁矿、粘土矿物和石英组成 ,矿石中的金与粗颗粒的多少呈正相关 ,为微细粒金和游离态金 ,被吸附于褐铁矿、粘土矿物和石英等矿物表面或裂隙中 ,在红色粘土剖面中与Mo、Sb、Hg、As等元素紧密共生 ,金在弱酸—弱碱性条件下活化、迁移 ,在潜水面附近再沉淀 ,上芒岗卡林型金矿体为红色粘土型金矿的主要矿源体。As identified by chemical analysis, electron probe analysis, transmission electron microscopy, X diffraction, grade classification, Au lixiviation experiment, ore minerals consist of limonite, clay minerals and quartz. Au in ores has positive correlation with the number of thick grades, is natural gold, and is absorbed on the surface or cranny of limonite, clay minerals, quartz, etc. Au tightly intergrows with Mo, Sb, Hg and As in the red\|clay profile, and is mobilized, transported and precipitated around the water table under the condition of feeble acid\|alk alescence. Gold in the red\|clay type gold deposit mainly comes from the Shangmanggang Carlin\|type gold orebody.

关 键 词：分配率 红色粘土型金矿床 化学分析法 X射线衍射 矿床地质 云南 成矿物质 

分 类 号：P618.51[天文地球—矿床学]