广西藤县古湾Au1号异常特征及其找矿意义

Characteristics and Prospecting Significance of the Au1 Anomaly of Guwan,Guangxi province

广西藤县古湾Au1号异常的发现和查证,经历了路线地质调查、水系沉积物测量、地化剖面测量等多个阶段。Au1号异常不仅浓集中心明显,平均值和衬度值高,还与Ag1、Pb1、As1、Bi1、Hg1异常套合好,并与之形成一个综合异常。通过查证,该异常与思运-尚厚逆断层关系密切,为矿致异常,异常源为一近南北向的破碎带。指出古湾金矿为断裂破碎带型金矿。提出含碳质页岩并具有黄铁矿化的断裂破碎带、毒砂矿化、Au、As和Bi的组合异常为研究区的找矿标志之一。

Through the geological investigation, stream sediment survey and geochemical profile measurement, Au1 anomaly is not only the concentration centers with high average value and contrast value, but also synthesized with Ag1, Pb1, As1, Bi1 and Hg1 anomaly. The anomaly has relationship with the NS thick reverse faults and fracture zone. The Guwan gold deposit is a fracture gold deposit. The fragmentation assemblage zone with carbonaceous shale and pyrite, arsenopyrite mineralization, Au, As and Bi anomalies are all the prospecting marks in the area.