川西北哲波山金矿床地球化学特征及找矿标志

THE GEOCHEMICAL FEATURE AND ORE-FORMING INDICATIION OF GOLD DEPOSIT IN ZHEBO, NORTHWESTERN SICHUAN

对哲波山微细浸染型金矿床地球化学特征进行初步的研究得出 :矿床次生晕中 Au,As关系密切 ,As是最佳指示元素 ;矿床原生晕特征在不同的成矿阶段表现出不同的特征。在热液成矿作用的早期石英 -毒砂 -黄铁矿阶段以富集 Au,Ag,As,Sb,Bi,W,Mo组合为特征 ,与岩浆演化关系密切 ,地表与之对应的氧化矿为“红矿”。成矿作用的晚期则富集 Au,Ag,As,Sb,Bi,B组合为特征 ,与其有关的热液流体为地下水热液 ,地表与之对应的氧化矿为“灰矿”。总体上分析 As,Bi,B,Ag为哲波山金矿床的特征指示元素 ,对“红矿”可增加 Co,Pb作为辅助指示元素 ;

The geochemical character of ore body is analyzed in this paper. The authors point out that As is the best ore hunting indication element in soil halo. As, Bi, B, Ag are the character indication elements in the primary halo. There is a good correlation coefficient between Au and Co in the quartz arsenopyrite pyrite mineralization stage (Ⅰ) of the hydrothermal phase. There is a best correlation between Au and B in quartz stibnite mineralization stage (Ⅱ). In the end of this paper, the geochemical ore hunting indicators as the type of the Zhebo gold deposit are given.