地球物理学进展 ›› 2019, Vol. 34 ›› Issue (2): 588-595.doi: 10.6038/pg2019CC0097

• 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

时间域激电测深在坦桑尼亚金矿床勘查中的应用例析

李水平,司建涛,程华,毛金彪,曹杰,孙进,张勇,高福利   

  1. 河南省地质矿产勘查开发局第二地质矿产调查院, 郑州 450001
  • 收稿日期:2018-07-11 修回日期:2019-01-22 出版日期:2019-04-20 发布日期:2019-05-13
  • 作者简介:李水平,男,1963年生,河南新安县人,高级工程师,长期从事地球物理矿产勘查和研究工作.(E-mail:hndzlsp@126.com)
  • 基金资助:
    自然资源部国外矿产资源风险勘查专项资金项目"坦桑尼亚Mwamola地区Maheiga金矿详查"(201210B01600252);国外矿产资源风险勘查专项资金项目资助(201210B01600234)

Application of time-domain IP sounding in the exploration of gold deposits in Tanzania

LI Shui-ping,SI Jian-tao,CHENG Hua,MAO Jin-biao,CAO Jie,SUN Jin,ZHANG Yong,GAO Fu-li   

  1. No.2 Institute of Geological and Mineral Resources Survey of Henan,Zhengzhou 450001,China
  • Received:2018-07-11 Revised:2019-01-22 Online:2019-04-20 Published:2019-05-13

摘要:

铁建造(BIF)型金矿和构造蚀变岩型金矿是坦桑尼亚绿岩带中主要金矿床类型,应用时间域激电测深获得了这两种类型金矿床内、由探测目标体和目的物引起的良好异常,了解了它们在地下半空间内的电性分布特征;依据激电测深显示的“低阻高极化”断面异常对含矿标志层(条带状含铁建造)、含矿构造(蚀变带)和金矿(化)体进行空间定位,为钻探工程布置、进而发现隐伏-半隐伏金矿床提供了充分依据.以坦桑尼亚绿岩带内近几年发现的典型金矿床为实例,分析时间域激电测深在这两种类型金矿床中的应用效果,以期为成矿地质条件类似地区通过激电测深手段寻找金矿产提供借鉴.

关键词: 时间域激电测深, 绿岩带, 金矿床, 坦桑尼亚

Abstract:

The Iron Formation (BIF) type gold deposit and tectonic altered rock type gold deposit are the main type of gold deposits in greenstone belt of Tanzania, The electrical distribution characteristics of the two types of gold deposits were obtained by using the time-domain IP sounding method, which was caused by the detection target body and the goal object,to understand their electrical distribution characteristics in the underground semi-space;Based on the IP sounding show “low resistance and high polarization” abnormal section for ore bearing marker layer (banded iron formation), ore structure (alteration belt) and gold mine (gold mineralization) space positioning, for the drilling engineering layout, and then found concealed-half concealed gold deposit provides the full basis. The typical gold deposits found in the green belt of Tanzania in recent years are examples, the application effect of time domain IP sounding in the two types of gold deposits is analyzed, in order to similar regional metallogenic geologic conditions through the IP sounding method in search of the golden minerals for reference.

Key words: Time-domain IP sounding, Greenstone belt, Gold deposits, Tanzania

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