综合物探方法在河北松山峪地区铁矿勘查中的应用

Application of integrated geophysical methods in the prospecting of iron deposit in the Songshanyu area,Hebei

松山峪地区位于唐山市丰润北东部,冀东水厂—杨店子铁矿成矿区西侧,具备良好的寻找沉积变质型铁矿的条件。根据该区地质及地球物理特性,通过地面磁测圈定磁异常区,采用音频大地电磁测深(CSAMT)和高精度磁测剖面相结合的方法,推断了磁性体产状及埋藏深度,并利用钻孔进行验证,发现了多层隐伏的磁铁矿体。其勘查结果表明,应用综合物探方法,可以快速确定深部隐伏矿体,为后期探矿工程部署提供依据,对于寻找同类型铁矿具有指导意义。

The iron deposit in Songshanyu area located in the northeast part of Fengrun, Tangshan area, occurs in the west of Shuichang-Yangdianzi iron metallogenic zone, eastern Hebei. There are favorable conditions for metamorphosed sedimentary type iron deposit. On the basis of studying geological features and geophysical characteristics, the integrated geophysical methods were applied to prospect in this area. First, three exploration target areas were delineated by using high-precision ground magnetic survey. Then the fa- vorable metallogenic area and the strike, tendency and burial depth of magnetic substance have been inferred through CSAMT and high -precision magnetic profiles. In the favorable metallogenic area, test drilling verification was conducted, finally the polylaminate mag- netite ore bodies have been found. The prospecting results show that magnetite ore body can be quickly identified by use of high-preci- sion magnetic survey and CSAMT method, and it also provides the basis for further exploration engineering. Meanwhile, it is one of the effective methods to find the same type of ore deposit in the region.