Significance of Exploration Indicators for Zhamutu Wulan Gold Deposit in Urad Middle Banner
SUN Nuoya1,ZHANG Xiaofang2,DING Weipin1,GUO Peng3,CHEN Tao4
1.Haikou Marine Geological Survey Center , China Geological Survey , Haikou 571127, China;2.Exploration and Development Research Institute of CNPC Huabei Oilfield Branch , Renqiu 062552, China;3.China Coal Geological Group Co., Ltd., Beijing 100040, China;4.Zhejiang Earthquake Agency , Hangzhou 310007, China
The Zhamutu Wulan Gold Deposit in Inner Mongolia is located within the metallogenic belt of gold, silver, copper, lead, zinc, platinum, molybdenum, boron, graphite, and talc along the northern margin of the North China Plate. In recent years, gold deposits such as the Changshanhao and Saiyinwusu have been discovered, making it a promising area for gold exploration. To further investigate the metallogenic geological characteristics of the Zhamutu Wulan Gold Deposit, this study analyzed the regional geological and geochemical features, employed digital geological survey methods, and combined geological and geochemical data from the study area. By referencing the metallogenic characteristics of known deposits both within and outside the region,the study proposed the key exploration indicators for altered rock-type gold deposits in fault zones: fault fracture zones,multi-element(such as Au,As,and Sb)geochemical anomaly areas,and silicification and limonitization phenomena formed after alteration of the surrounding rocks. Based on these exploration indicators, three prospective exploration targets were delineated within the study area,including one A-grade gold target and two B-grade gold targets. This study aims to provide guidance for future exploration efforts and offer a reference for the discovery of similar deposit types in the region.
AS-13异常位于研究区的西北部,异常体受北东向和南北向两组构造控制,呈不规则状且未完全封闭。异常元素主要包括W、Bi、Cu、Zn、Mo、Pb、Ag等,元素组合为W24.42-Bi22.80-Cu16.25-Zn12.81-Ni12.79-As10.47-Mo6.72-Co4.63-Pb4.48-Ag4.15。该异常组合元素种类较多,套合关系良好,且具有明显的浓集中心,主要出露层为东五分子组(Ar3d)和比鲁特组(Jxb)。在区内采集的构造破碎带样品和石英脉样品中, Cu 含量为0.003%~0.019%,Zn含量为0.035%左右,Au含量为0.07~0.2×10-6,具有很好找矿潜力。