摘要
简要介绍了高精度磁测的应用现状 .通过金厂沟金矿区辽河群大石桥岩组与盖县组接触界限的划分 ,以及阜新建设花岗岩与长英质糜棱岩边界的划分等实例 ,说明得用高精度磁测结果 ,在配合地质填图、划分地质界线、圈定矿体和寻找古墓及古坑道等地质问题方面的优越性 .用于隐伏区地质填图时 ,不仅能确定强磁性岩石边界 ,而且还能确定弱磁性岩石边界 .在提高信息密度的前提下 ,根据磁化率K值和剩余磁化强度Jr 值的不同 ,在典型成矿区能直接圈定弱磁性矿体 .
High-precision magnetic measurement has been broadly applicated in geological surveying.The magnetic data are advantageous in geologic mapping,geologic boundry delineating,ore-body outlining,as well as ancient tomb and buried gallery searching.When mapping in concealed areas,high-precision magnetic measurement can decide not only strongly magnetic rocks' boundary,but also weakly magnetic rocks' boundary.On the premise of increasing the information density,the weakly magnetic orebodies in typical metallogenic provinces can be outlined simply by the different magnetic susceptibilities and residual magnetization.Some examples are given,such as the delineating of the boundary between Dashiqiao and Gaixian formations of Liaohe group in Jinshangou gold field,and the delineating of the boundary between the granite and the felsic mylonite in Fuxin.
出处
《地质与资源》
CAS
2001年第3期184-189,共6页
Geology and Resources
关键词
高精度磁测
地质填图
弱磁性矿体
微磁测量
high-precision magnetic measurement
geologic mapping
weakly magnetic orebody
micromagnetic measurement
