井中矿层多要素探测方法研究与厚覆盖区金矿勘查试验-以皖东北五河地区为例  

Study on the Multiple-Element Exploration Method of Ore Beds in Wells and Gold Exploration Experiment in the Area with Thick Cover-Taken Wuhe Area in Northeast Anhui as An Example

作　　者：汪青松[1,2,3] 张金会 尤淼[1,2,3] 毛思斌 产思维[1,2] WANG Qingsong;ZHANG Jinhui;YOU Miao;MAO Sibin;CHAN Siwei(Geological Exploration Technology Institute of Anhui Province,Hefei,Anhui 230031;Key Laboratory of Electrical Exploration of Anhui Province,Hefei,Anhui 230031;Technology Imovation Center of Coverage Area Deep Resource Exploration Engineering,MNR,Hefei,Anhui 230001)

机构地区：[1]安徽省勘查技术院,安徽合肥230031 [2]安徽省电法勘探重点实验室,安徽合肥230031 [3]自然资源部覆盖区深部资源勘查工程技术创新中心,安徽合肥230001

出　　处：《地质与勘探》2021年第1期136-145,共10页Geology and Exploration

基　　金：安徽省地勘基金项目“安徽省五河金矿整装勘查”(编号:2013-3-9)资助。

摘　　要：常用测井及井中物探方法划分孔内地层、推断矿层产状及盲矿体方位时,需要多次井中测量,不仅工作效率低,而且在厚覆盖区还存在矿层产状探测等难题。笔者根据金属矿低阻良导属性和充电法勘查理论,提出了一发四收充电测井法地质多要素观测系统,利用具有一发多收功能的大功率电法勘探系统,采用井-地联合观测方式,在井中连续移动充电,在地面四方位同步测量电位。试验表明,该观测系统一次井中测量,可同时完成推断矿层产状、确定矿层厚度、寻找打漏矿层、发现井傍盲矿体和孔内地层划分等多项地质任务,勘查效率高、效果好,解决了厚覆盖区矿层产状探测长期存在的难题,是一种适合厚覆盖区井中矿层地质多要素探测的新方法,具有推广意义。Logging and borehole geophysical methods can be used to divide the formation in the hole,to infer the occurrence of ore bed and the location of blind orebody.They need many times of measurement in the well,not only with low efficiency,but also facing difficulty of probing ore beds in the area with thick cover.To solve this problem,based on the theory of low resistivity and good conductivity of metal ores and charging exploration theory,this study proposes a geological multiple-element observation system with the logging method by one emission and four receivers.By using the high-power electric prospecting system with one emission and multiple receiver function and well-ground joint observation method,it moves continuously and charges in the well,and measures potential synchronously in the four azimuths on the ground.The test shows that this system can accomplish many geological tasks at the same time,such as inferring the occurrence of the ore bed,determining the thickness of the ore bed,finding the leaking ore bed,finding the blind ore body near the well and dividing the strata in the hole.It has high exploration efficiency and good effect,solves the long-standing problem of the occurrence detection of the ore bed in the thick-cover area,and is worthy to be popularized.

关 键 词：井中物探 多要素探测 新方法试验 金矿勘查 厚覆盖区 

分 类 号：TD325.3[矿业工程—矿井建设] P631[天文地球—地质矿产勘探]