内蒙古达斯呼都格矿区综合地球物理场特征与找矿预测

内蒙古达斯呼都格矿区位于得尔布干成矿带西南段,区内成矿条件优越,成矿类型以斑岩型矿床为主,但工作区内地表草原覆盖严重,几乎没有基岩露头,传统地质手段难以奏效。本文通过地面高精度磁测、大功率激电扫面、音频大地电磁测深等综合物探方法,结合遥感、钻孔等资料,推测了该地区火山机构位置与岩体分布特征以及浅部铅锌矿的分布规律。音频大地电磁测深资料表明,本区岩体可分为两期,其中晚期岩体与成矿关系密切,为下一步矿产勘查指明了方向。

Characteristics of the geophysical fields and prospecting prediction in the Dasihuduge copper mine of Inner Mongolia

The Dasihuduge mine of Inner Mongolia lies in the southwest section of the Derbugan metalloginic belt, which hosts good metallogenetic conditions, dominated by porphyry-type deposits. But the surface throughout this area is covered by grassland with little outcrops of bedrocks, thus traditional geological methods cannot work well in prospecting. To solve this problem, this work appealed to integrated geophysical methods such as high-accuracy ground magnetic survey, high power IP, and audio frequency magnetotelluric sounding, combining with data of remote sensing and drilling. The objective was to predict the positions of volcanic structures and rock distribution features in this area, and the rules of lead zinc deposit distribution in the shallow subsurface. As one of the results, the audio frequency magnetotelluric sounding data show that the rocks of this area can be divided into two periods, of which the latter one is closely related to mineralization, suggesting the direction for further prospecting in this mine area.