地球物理学进展 ›› 2019, Vol. 34 ›› Issue (2): 545-553.doi: 10.6038/pg2019CC0039

• 应用地球物理学Ⅰ(油气及金属矿产地球物理勘探) • 上一篇    下一篇

基于音频大地测深法研究乌拉嘎断裂

高天1,何国丽1,2,4,周安昌3,王光杰1,2,4,郭洋1,陈彩云1,李永兵1,*(),石耀霖1   

  1. 1. 中国科学院大学,北京 100049
    2. 中国科学院地质与地球物理研究所,北京 100029
    3. 中国地质科学院地球物理地球化学勘查研究所,河北廊坊 065000
    4. 中国科学院地球科学研究院,北京 100029
  • 收稿日期:2018-06-26 修回日期:2018-12-12 出版日期:2019-04-20 发布日期:2019-05-13
  • 通讯作者: 李永兵 E-mail:yongbingli@ucas.ac.cn
  • 作者简介:高天,男,1992年生,河南商丘人,硕士,主要从事矿物岩石矿床研究.(E-mail:gaotian15@mails.ucas.ac.cn)

Study on the Wulaga fault by Audio Magnetotelluric(AMT)

GAO Tian1,HE Guo-li1,2,4,ZHOU An-chang3,WANG Guang-jie1,2,4,GUO Yang1,CHEN Cai-yun1,LI Yong-bing1,*(),SHI Yao-lin1   

  1. 1. University of Chinese Academy of Sciences, Beijing 100049, China
    2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
    3. Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Hebei Langfang 065000, China
    4. Institution of Earth Science, Chinese Academy of Sciences, Beijing 100029, China
  • Received:2018-06-26 Revised:2018-12-12 Online:2019-04-20 Published:2019-05-13
  • Contact: Yong-bing LI E-mail:yongbingli@ucas.ac.cn

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.

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

Abstract:

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.

Key words: Magnetotelluric sounding method (AMT), Wulaga fault, Apparent resistivity profile, Metallogenic mechanism, Resistivity

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