高精度磁测在河南省嵩县草房寺铁矿区找矿中的应用

Application of high precision magnetic measurement in mining area of caofangsi iron mine in songxian county

寻找草房寺铁矿区下一步的找矿验证提供依据的关键之一在于快速准确的查明矿区磁性特征。本次磁测工作在减小磁测点距的基础上展开。结果显示,矿区两个主要地层中元古代宽坪群和太古宙太华群的磁性特征差异较大,需要准确划分磁异常范围。结合工区不同地层的地磁特征,认为在两个地层中选择不同的背景场圈定磁异常有利于异常的进一步解释。在矿区北边,由于磁异常未闭合,增加工作量直至异常完整。在解释异常时,在4个异常所在的剖面上选取部分数据进行了2.5D人机交互反演,拟合出磁性体的深部形态与深度,为下一步的验证提供依据。

In order to quickly and accurately identify the magnetic characteristics of the mining area,our magnetic measurement point distance design is small.The magnetic measurement results show that the magnetic characteristics of the Proterozoic Kuanping Group and the Archean Taihua Group in the two major strata in the mining area are quite different.In order to accurately divide the magnetic anomaly range,combined with the geomagnetic characteristics of different strata in the industrial area,It is believed that the selection of different magnetic anomalies in the background field in the two strata is conducive to the further explanation of anomalies.After the end of the preliminary work,in the north of the mining area,due to magnetic anomalies not closed,the workload increased until the anomaly was complete.In order to explain the anomalies,2.5 D man-machine interaction inversion was performed on the profiles of the four anomalies,and the deep morphology and depth of the magnets were fitted,which provided a basis for the next verification.