大功率激电在金属矿深部找矿中的应用  

The Application of High-power Induced Polarization(IP)in Metallic Ore Prospecting

作　　者：李宁生 赵福元 仵阳 周磊[2] 

机构地区：[1]宁夏地球物理地球化学勘查院,宁夏银川750001 [2]油气资源与勘探技术教育部重点实验室(长江大学),湖北武汉430100

出　　处：《石油天然气学报》2013年第8期54-56,61,共4页Journal of Oil and Gas Technology

基　　金：国土资源部公益性行业科研专项经费资助项目(201111006)

摘　　要：电磁方法大多为单参数测量,如CSAMT(可控源音频大地电磁测深法)虽然勘探深度较大,但其仅能测量卡尼亚视电阻率一种参数;其对控矿构造的划分效果较明显,但对是否存在与金属硫化物有关的多金属矿体的判断较为困难,在金属矿深部找矿工作中存在困难。随着金属矿找矿工作的深入开展,多参数、大深度的电法勘探已成为金属矿找矿工作的主要手段,尤其是与硫化物有关的多金属矿产的勘查更是需要激电类电法工作。介绍了利用V8工作站多道测量的优势,在具有代表性的矿区运用大功率双频三极激电测深工作方法进行试验,试验结果表明,在保证信号良好的情况下,其勘探深度可以轻松超过400m,接地条件良好时勘探深度可达800m,完全满足深部找矿的要求,该方法对今后深部找矿具有重要的意义。Most electromagnetic methods were single parameter measurement,such as CSAMT(controlled source audio-frequency magnetotelluric sounding) though it was used for deeper oilexploration,but it could be used for measuring apparent resistivity only.It was effective for identifying ore-controlling structure clearly,but it was hardly to figure out the polymetallic sulphides,it was the problem for deep ore prospection.With the development of metallic ore prospecting,multi-parameter and high depth electric method has become the main tool for ore prospecting,especially more IP electric methods were needed for polymetallic sulphide prospecting.The advantages of multi-channel measurement in V8 workstation were introduced and it was tested by using high-power dual-frequency and tri-polar electric methods.The results show that if good condition is ensured,the exploration depth could be easily over 800m,it could completely meet the requirements of ore exploration,it is of great significance for deep ore exploration in the future.

关 键 词：大功率激电 多金属矿 双频三极激电测深 

分 类 号：P631.3[天文地球—地质矿产勘探]