广西思旺地区水系沉积物(土壤)地球化学特征及找矿方向

Geochemical characteristics of stream sediment(soil) and prospecting direction in Siwang area of Guangxi

广西思旺地区位于钦杭成矿带西南端大瑶山金多金属成矿带上,1∶50 000水系沉积物测量成果表明该区Au、Ag、As、Hg、Sb、Pb、Cu、Sn、Mo、Bi等元素含量明显高于全国水系沉积物元素含量水平,Au、Ag、As、Pb、Cu、Sn、Bi、Mo等元素高于广西区背景含量;异常元素主要沿凭祥―大黎深大断裂两侧呈近EW和NE向带状展布。主要异常区均分布在凭祥―大黎深大断裂与近SN向断裂交汇处。根据异常特征与成矿地质条件,圈定了5个找矿远景区,为该区下一步找矿工作指明了方向。

Siwang area of Guangxi is located in Dayaoshan gold polymetallic metallogenic belt which is at the southwestern end of Qinzhou - Hangzhou metallogenic belt. Results of stream sediment survey at 1 ： 50 000 scale showed that the content levels of elements like Au, Ag, As, Hg, Sb, Pb, Cu, Sn, Mo, Bi were significantly higher than the nationwide average element content level of stream sediments, and content levels of elements like An,Ag,As,Pb,Cu,Sn,Bi,Mo were higher than background content level of Guangxi; anomaly elements were mainly distributed along both sides of Pingxiang - Dali deep fracture in the form of nearly EW- and NE- trending belts. The major anomaly regions are distributed at the juncture of Pingxiang - Dali deep fracture and nearly NS-trending fracture. According to the anomaly characteristics and metallogenic conditions of the area, the authors blocked out five prospecting prospect areas and pointed out the direction of the future pros- pecting works in the area.