地面高精度磁测在蒙古13451矿区地质填图中的应用

The application of high precision ground magnetic prospecting for geological mapping in the 13451 mining area in Mongolia

研究区内岩石物性差异明显,为进行高精度磁测提供了可靠的地球物理依据.本次工作利用Hc-95型手持式氦(~4He)光泵磁力仪在13451矿区进行了高精度磁法扫面,在划定岩性界线的同时,还识别出了隐伏的中基性火山岩.通过磁法资料的延拓处理,指出了重要的构造边界.磁法数据与地质填图的完美耦合,不仅使物探方法更好地为覆盖区地质填图服务,而且为圈定成矿有利部位提供了重要依据.

The obvious differences o{ petrophysical properties in the studied region have provided reliable geophysical basis for the high precision magnetic prospecting. The paper reports the results of high precision magnetic survey in the 13451 mining area by using the Hc-95 hand-held helium （4He） optical pumping magnetometer. The result recognizes the hidden mafic-intermediate volcanic rocks when discerning the lithological boundary. By continua^ion processing the magnetic data, the authors point out the important structural boundary. The perfect combination of magnetic data and geological mapping has made geophysical method better serve the geological work at cover region. It also provides significant reference for delineating the beneficial ore-forming positions.