| 大地电磁测深法在铜镍矿勘查中的应用 |
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| 引用本文：.2007.Application of magnetotelluric method to Cu_Ni ore exploration: A case study of Tulargen Cu_Ni deposit in Xinjiang[J].Mineral Deposits,26(1):120~127 |
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| 基金项目: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）及国家“十一五”科技支撑计划重大项目二级课题（2006BAB01A02） |
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| 中文摘要: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。 |
| 中文关键词: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 |
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| Application of magnetotelluric method to Cu_Ni ore exploration: A case study of Tulargen Cu_Ni deposit in Xinjiang |
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| Abstract:Characterized by easy application, no need for artificial sources and large detection depth, the magnetotelluric 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 show that their 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 soft wares. |
| keywords:geophysics, magnetotelluric sounding, Cu_Ni deposit, resistivity, exploration, data processing and inversion, Tulargen, eastern Xinjiang |
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