CSAMT方法在仓上金矿外围及深部找矿中的应用  

Application of CSAMT Method in Depth and Peripheral Prospecting of Cangshang Gold Deposit

作　　者：冯欣欣 董晴晴 FENG Xinxin;DONG Qingqing(Shandong Gold Geology and Mineral Resources Co.,Ltd.,Laizhou 261400,Shandong,China)

机构地区：[1]山东黄金地质矿产勘查有限公司,山东莱州261400

出　　处：《黄金科学技术》2019年第1期33-40,共8页Gold Science and Technology

摘　　要：仓上金矿位于三山岛—仓上断裂西南部,西邻渤海湾,是我国大型露天金矿之一。至2005年闭坑后,在矿山外围及深部找矿一直未取得新进展。为加大勘探深度,探查矿区外围和深部断裂及岩体的空间展布情况,寻找深部金矿资源,采用CSAMT331号地质剖面进行了综合对比分析,结果显示F1推断断层与三山岛—仓上断裂相吻合,提出验证钻孔1个。经钻探工程验证见金矿体,取得了较好的应用找矿效果,为下一步开展地质找矿提供了有价值的地球物理信息依据。There are abundant gold resources in Jiaodong area,which are mainly controlled by Sanshandao- Cangshang fault,Jiaojia fault and Zhaoping fault.Three major gold metallogenic belts were formed in the area, where several large and super-large gold deposits have been found. Jiaodong area has provided a large amount of gold reserves,and it’s an significant gold concentration area and gold industrial base in China.The main research area in this paper is Cangshang gold deposit,which located in southwest of Sanshandao-Cangshang fault that adjacent to the Bohai Bay.It is one of the large open-air gold deposit in China. Since Cangshang gold deposit closure in 2005,Shandong Gold Group,many geological exploration agencies and scientific research institutes have conducted a lot of prospecting work around the mine,but no new progress has been made in prospecting.In order to find out the spatial distribution of the fault and rock mass in the depth and periphery of the mining area,and search for deep gold resources,geophysical exploration method was used to conduct deep exploration in the area,and the conventional electrical and magnetic exploration was compared with CSAMT (Controlled Source Audio-Frequency Magnetotellurics).The conventional electric and magnetic exploration is difficult to meet the needs of exploration because the the depth of conventional electric and magnetic exploration is relatively shallow,and the results are reflected on the plane.CSAMT was choose to conduct deep profile exploration in the area.Field construction was carried out in the northern part of the mining area,and two CSAMT sounding sections were arranged along the vertical direction of the Cangshang fault,numbered L4000 and L4300. The length of L4000 section was 1 440 m,and L4300 section was 1 160 m,line distance was 300 m,point distance was 40 m and azimuth angle was 120°.The emission dipole sources AB were arranged in parallel lines in the northeast.The dipole distance of AB was 1.2 km,the receiving dipole distance of MN was 40 m,the receivi

关 键 词：CSAMT 金矿体 地球物理信息 深部找矿 仓上金矿 三山岛-仓上断裂 

分 类 号：P618.51[天文地球—矿床学]