胶东大尹格庄金矿床后疃矿区深部矿体定位预测

Deep ore body positioning and prediction in Houtuan mining area of Dayingezhuang Gold Deposit in Jiaodong

后疃矿区位于大尹格庄金矿床主矿区外围,属于深边部找矿区段。采用多元信息找矿策略,通过构造地球化学法-伽玛能谱法-多极化电磁测深技术组合,开展后疃矿区深边部成矿预测。完成地表构造地球化学与伽玛能谱测量面积12 km^(2),结合因子分析,厘定后疃矿区构造地球化学找矿标志为Au-Ag-As-Sb组合异常。同时,采用MPMT-18多极化电磁测深系统,完成了L108测线—L136及L80测线多极化电磁测深和异常反演,确定了后疃矿区深部招平断裂的位置。根据构造地球化学测量、伽玛能谱测量与大地电磁测深的异常特征、分布与关联性,结合钻探工程验证的有利程度,共圈定找矿靶区8处。其中,A-1、B-1、B-3、C-2和C-3找矿靶区经钻探工程验证并见矿。

Houtuan mining area is located on the periphery of the main mining area of Dayingezhuang Gold Deposit in Jiaodong,belonging to a deep and peripheral exploration area.Using a pluralized information exploration strategy,a combination of structure geochemistry-gamma spectroscopy-multi-polarize electromagnetics techniques was used to carry out ore prediction in the deep and peripheral areas of Houtuan mining area.Surface structure geochemistry and gamma spectroscopy measurements covering area 12 km^(2) were conducted,and through factor analysis,Au-Ag-As-Sb combination anomalies were identified as prospecting indicators in Houtuan mining area.Additionally,using the MPMT-18 multi-polarized magnetotelluric system,multi-polarize electromagnetics and anomaly inversion along Measurement Line L108-L136 and L80 were completed,determining the location of the deep Zhaoping fault in Houtuan mining area.Based on the anomalous features,distribution,and correlation of structural geochemical measurements,gamma spectroscopy measurements,and multi-polarize electromagnetics,combined with the favorable degree verified by drilling projects,a total of 8 exploration targets were identified.Among them,the A-1,B-1,B-3,C-2,and C-3 exploration targets were verified by drilling projects and yielded mineralization.