高精度磁法测量在青海大格勒沟地区镍钴铁矿勘查中的应用

运用1∶1万高精度磁测方法,对1∶5万区域地质矿产调查中发现的磁异常深部隐伏控矿构造及地质体进行评价。结果表明,高精度磁测既有利于圈定隐伏的控矿构造,也有利于圈定隐伏磁性地质体。1∶1万高精度磁法测量数据解译表明,研究区内存在两种不同特征的磁场区域,分别为北部强磁性磁场区、南部低缓-背景磁场区,在磁场区域圈定出3处磁异常,并对磁异常优选剖面反演推断,结合推测出7条深部隐伏断裂构造,旨在说明区内的深部隐伏控矿构造及形成了正磁异常,显示出深部具有较大的镍钴铁矿成矿潜力,为该区开展地质找矿工作提供较为可靠的地球物理依据。

Application of high-precision magnetic surveying in the exploration of nickel-cobalt-iron deposits,Dagelegou area, Qinghai Province

Using the 1∶10,000 high-precision magnetic survey method,the hidden buried ore-controlling structures and geological bodies in the deep magnetic anomalies found in the 1∶50,000 regional geological and mineral survey were evaluated.The results show that high-precision magnetic surveys are conducive to delineating concealed ore-controlling structures as well as delineating concealed magnetic geological bodies.The interpretation of the high-precision magnetic measurement data of 1∶10,000 shows that there are two kinds of magnetic fields with different characteristics in the study area,namely the strong magnetic field in the north and the low-background magnetic field in the south.Three magnetic anomalies are delineated in the magnetic field.And inferred the optimal profile inversion of magnetic anomalies,combined with the speculation of 7 deep concealed fault structures,the purpose is to explain the deep concealed ore-controlling structures in the area and the formation of positive magnetic anomalies,showing that the deep has great mineralization potential.Provide a more reliable geophysical basis for geological prospecting in this area.