大地电磁测深法在铜镍矿勘查中的应用——以与超镁铁质岩有关的新疆图拉尔根铜镍矿为例  

Application of magnetotelluric method to Cu-Ni ore exploration:A case study of Tulargen Cu-Ni deposit in Xinjiang

作　　者：梁光河[1] 徐兴旺[1] 肖骑彬[1] 蔡新平[1] 秦克章[1] 张宝林[1] 三金柱[1] 惠卫东 彭晓明 

机构地区：[1]中国科学院矿产资源重点实验室中国科学院地质与地球物理研究所,北京100029 [2]新疆有色地勘局704大队,新疆哈密839000

出　　处：《矿床地质》2007年第1期120-127,共8页Mineral Deposits

基　　金：中国科学院知识创新工程重要方向(KZCX3-SW-137);国家"十五"科技攻关新疆305项目(2003BA612A-06-7);国家"十一五"科技支撑计划重大项目二级课题(2006BAB01A02)的联合资助

摘　　要：文章介绍了大地电磁勘探的基本原理,结合在新疆哈密地区图拉尔根铜镍矿区的实际应用,从野外数据采集到资料处理和地质解释对该方法的实际效果进行了剖析,所获异常得到钻探证实为厚大矿体。文章还对该方法的适用条件进行了分析,并给出了在荒漠戈壁地区进行大地电磁勘探的一些可以借鉴的经验。Characterized by easy application, no need for artificial sources and Large detection depth, me magnerorelluric method has played an important role in deep crust structure detection, petroleum basin survey and deep-water resource exploration. This paper deals with the fundamental principle of magnetotelluric sounding, and describes its practical application in the Tulargen Cu-Ni deposit. A detailed analysis of this method from field data acquisition to data processing and geological interpretation is also given in this paper. The resistivity anomalies were proved by drilling to be manifestations of large and thick Cu-Ni ore bodies. Finally, a discussion is made on the applicability of this method and some experience is given which may be helpful to the utilization of this technique in the desert and gobi area of northwestern China. In field work, the authors used the newest GMS-06 magnetotelluric sounding instruments made by GEOMETRICS Company of Germany. Six instruments recorded data simultaneously, which included two 5-channel instruments and four 2-channel instruments with GPS synchronization. In order to confirm the performance and stability of these instruments, the authors carried on a contrast experiment on site. The results snow mat thelr stability is good, and the original data have high confidence level. Comparative research work was also conducted for one-dimensional and the two-dimensional inversion softwares of the data obtained by the authors in data processing. Data processing was finally performed by using the software optimized from many softwares.

关 键 词：地球物理 大地电磁测深 铜镍矿 电阻率 勘查 数据处理和反演 图拉尔根 新疆 

分 类 号：P631.325[天文地球—地质矿产勘探] P618.41[天文地球—地质学]