CSAMT在河南郁山大型隐伏铝土矿勘查中的应用

THE ROLE OF CSAMT IN THE EXPLORATION OF THE YUSHAN LARGE-SIZE BAUXITE DEPOSIT IN HENAN PROVINCE

通过河南郁山隐伏铝土矿详查中的应用实例,结合覆盖区矿区勘查特点,对可控源音频大地电磁法(CSAMT)在测量隐伏铝土矿勘查中的作用进行了总结。河南郁山隐伏铝土矿勘查深度为150～700 m,常规的直流电测深法很难在勘查深度上满足需要。而基于CSAMT的WINGLINK2D和WINGLINK1D反演结果,能准确反映深部含矿岩系、地层及构造的特征,为合理优化工程布置打下了良好的基础。

Combining the application of this method in the exploration of the Yushan large-size concealed bauxite deposit in Henan Province and the exploration characteristics of the covered mining area,this paper discusses the advantage of CSAMT for the pre-survey and survey of concealed bauxite deposits. The exploration depth of the Yushan concealed bauxite deposit in Henan Province is generally 150 -700 m, which is so deep that the conventional D. C. electric sounding method cannot meet the needs. The Controlled Source Au- dio-frequency Magnetotellurics （CSAMT） is a new geophysical technique, and has such advantages as stronger signal, deeper explora- tion depth and higher resolution. Based on the inversion result of WINGLINK2D and WINGLINKID, it can accurately reflect the char- acteristics of deep ore-bearing rock series, formations and structures, and optimize the layout of the project.