CSAMT方法在寻找隐伏金矿中的应用

可控源音频大地电磁法（CSAMT）的应用是百里店矿山多种地球物理研究的一部分．由于激发极化法（IP）的穿透率和分辨率是与几何因素密切相关，对于较深部的地质特征，靠IP法不容易分辨出来．CSAMT较好地解决了这个问题，首先，根据区域地质背景、成矿条件和矿区岩石物性特征，开展了面积性的激电测量，进而开展了CSAMT方法的探测研究．通过对CSAMT原始数据的分析解释，发现测区深部存在两条低电阻率梯级带，其中一条为陡倾斜；另一条为缓倾斜，两者在地下800m左右深度处相互斜交．经地质推断解释认为：这是测区内金矿的主要控矿、导矿及容矿构造．

THE APPLICATION OF CSAMT METHOD IN LOOKING FOR HIDDEN GOLD MINE

Controlled Source Audiomagnetotelluric method is one of the geophysical methods applied in Beilidian region. Because penetration coefficient and resolution power of induced polarization method （IP） is correlative with geometric factors, so the deeper geology features can not been obtained clearly by IP method. CSAMT is a better way to solve mis problem. First area survey by IP method was carried out according to the regional geology background, mineralization conditions and physical features of rocks in mine field, then CSAMT method was measured. After data processing, two low-resistivity gradient zones in deeper part of measure area can be found; one of them inclined steeply and another one inclined slowly. They intersect in 800m depth.We believe that they are main host structure and ore-control strictires.