摘要
桂西北板纳组的Au丰度在区域上分为原始区、贫化区及富集区。S,As,Sb,Hg均低于沉积岩中平均丰度,但其变异系数明显高于其他微量元素。地层和微细浸染型金矿矿石中Au和Li呈正相关,矿石中Cd明显富集。
Gold distribution district in Banna Formation is classified into originalarea, deficit area and enriched area. Concentration of S, As, Sb is lowerthan the mean value of sediment rocks in the world, but variation coefficienciesof S, As and Sb are much higher than those of other elements. Goldconcentration is directly correlated with concentration of Li in backgroundstrata and in the ores of fine-disseminated gold ore deposits. Cd is stronglyenriched in the ores.
关键词
金
锑
砷
地球化学
三叠系
广西
antimony
arsenic
geochemistry
Middle Triassic
Guangxi
