张量可控源音频大地电磁法及其应用效果

The method of tensor CSAMT and its application effects

可控源音频大地电磁法(CSAMT)是一种重要的勘探手段,在资源勘查中得到广泛应用,其中张量CSAMT是最近几年才在国内兴起。这里介绍了张量CSAMT方法原理和野外采集技术,使用V8多功能电法仪在某铅锌矿区进行了野外试验,并通过分析野外数据判断地下地质结构的维数,选择适合的反演方法,对不同模式的的张量CSAMT数据的进行了反演研究,得出了试验剖面可靠的二维电性结构,结合已有的地质、物探资料表明,该方法对矿体的整体形状、倾向都有较好地反映。

Controlled source audio magnetotelluric method（CSAMT）is an important method of exploration,which has been widely used in resource exploration filed,whilst the tensor CSAMT has been focused recent years in the country.This paper introduces the basic principles of tensor CSAMT and the field data acquisition technology with the using of V8 multifunctional electrical meter to conduct a field test in a lead-zinc mining area.By analyzing the field data for determining the dimension of underground geological structures,selecting the appropriate inversion method,and by inversion of the different modes of the tensor CSAMT data,the two-dimensional cross-section electrical structure of test profile is obtained by the inversion of the different modes of the field data.Combined with the existing geological and geophysical data,it indicates that the method is very well to show the shape and tendency of the ore bodies.