摘要
乌拉嘎断裂位于嘉荫凹陷的东缘,对乌拉嘎金矿的成矿的起着关键作用.地质推断的乌拉嘎断裂位于金矿的北部呈NNE展布,理论上可通过电阻率差异分辨出乌拉嘎断裂切实可行.本文采用音频大地电磁测深法(AMT)来观测乌拉嘎断裂的电性特征并获得了高分辨率的视电阻率剖面图,本次观测结果很好的揭示了乌拉嘎断裂的电阻率特征,我们试图通过研究乌拉嘎断裂进而对本区的深部成矿机制进行研究.本次工作初步厘定了乌拉嘎断裂的宽度、深度,实践证明在乌拉嘎地区采用音频大地电磁测深法探测大型断裂构造具有良好效果.
The Wulaga fault is located in the eastern of the Jialin sag and plays a key role in the mineralization mechanism of the Wulaga gold deposit.The geological inference of the Wulaga fault is located in the north of the gold mine showing NNE.It is practically possible to distinguish the Wulaga fault by resistivity difference.In this paper,the electrical characteristics of the Wulaga fault are observed by the Audio Magnetotelluric sounding method(AMT)and the high-resolution resistivity profile is obtained.The results show that the resistivity of the Wulaga fault is well revealed.The study of the deep mineralization mechanism in this area is carried out.We have tried to study the deep mineralization mechanism in the area by studying the Wulaga fault.The width and depth of the Wulaga fault were initially determined.Practice has proved that the use of Audio Magnetotelluric sounding(AMT)in the Wulaga area to detect large-scale fault structure has a very good effect.
作者
高天
何国丽
周安昌
王光杰
郭洋
陈彩云
李永兵
石耀霖
GAO Tian;HE Guo-li;ZHOU An-chang;WANG Guang-jie;GUO Yang;CHEN Cai-yun;LI Yong-bing;SHI Yao-lin(University of Chinese Academy of Sciences,Beijing 100049,China;Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China;Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Hebei Langfang 065000,China;Institution of Earth Science,Chinese Academy of Sciences,Beijing 100029,China)
出处
《地球物理学进展》
CSCD
北大核心
2019年第2期545-553,共9页
Progress in Geophysics
关键词
音频大地电磁测深
乌拉嘎断裂
视电阻率剖面图
成矿机制
电阻率
Magnetotelluric sounding method(AMT)
Wulaga fault
Apparent resistivity profile
Metallogenic mechanism
Resistivity
