蒙应华,张西君,刘俊,王永泰.瞬变电磁法确定隐伏岩溶在贵州正安旦坪铝土矿勘探定孔中的应用[J].贵州地质,2021,38(2):177-183
瞬变电磁法确定隐伏岩溶在贵州正安旦坪铝土矿勘探定孔中的应用
The Application of Transient Electromagnetic Method in Determining the Location of Drilling Holes and Concealed Karst in the Exploration of Danping bauxite in Zheng’an,Guizhou
投稿时间:2021-01-29  
DOI:
中文关键词:  瞬变电磁  岩溶区  矿产勘查  隐伏岩溶  视电阻率  铝土矿  贵州
英文关键词:Transient electromagnetic method  Karst area  Bauxite exploration  Apparent resistivity  Zhengan,Guizhou
基金项目:贵州省大精查项目办《贵州省正安县旦坪铝土矿勘探》资助。贵州省科学技术厅“贵州省地质物探开发应用工程技术研究中心”(黔科合【2016】平台人才5401)。
作者单位
蒙应华 贵州省地质调查院贵州贵阳550081
贵州省地质物探工程技术研究中心贵州贵阳550081 
张西君 贵州省地质调查院贵州贵阳550081
贵州省地质物探工程技术研究中心贵州贵阳550081 
刘俊 贵州省地质调查院贵州贵阳550081
贵州省地质物探工程技术研究中心贵州贵阳550081 
王永泰 贵州省地质调查院贵州贵阳550081
贵州省地质物探工程技术研究中心贵州贵阳550081 
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中文摘要:
      贵州正安旦坪铝土矿大精查项目位于黔北典型岩溶区,为在钻探施工中有效避开岩溶,减少损失,提高勘查效率,达到铝土矿勘探定孔目的,在基本掌握研究区地质背景与地球物理特征的基础上开展物探瞬变电磁法测量。本文简单介绍了物探瞬变电磁法(TEM)的工作原理及探测方法,着重通过在已知钻遇溶洞钻孔ZK14604开展方法性试验,选取合适观测参数,再结合地质、钻探资料对物探断面及平面切图视电阻率异常特征进行综合研究定孔,根据已知到未知的原则,逐步对矿区其他拟布钻孔展开测量。据钻探成果资料显示,研究区已施工物探定孔均有效避开隐伏岩溶,物探成果得到了有效验证。表明利用瞬变电磁法在岩溶区铝土矿勘查定孔中能取得较好效果,可为今后岩溶地区矿产勘查隐伏岩溶调查提供方法借鉴。
英文摘要:
      Guizhou Zheng’an Danping bauxite mine large-scale investigation project is located in a typical karst area in northern Guizhou,To effectively avoid karst during drilling construction,Reduce loss,Improve survey efficiency,Achieve the purpose of drilling holes in bauxite exploration,Based on the basic grasp of the geological background and geophysical characteristics of the study area,carry out geophysical transient electromagnetic surveys,This article briefly introduces the working principle and detection method of the geophysical transient electromagnetic method(TEM),Emphasis on the methodological test carried out in the known karst cave hole ZK14604,Choose appropriate observation parameters,Combined with geological and drilling data,comprehensively study the apparent resistivity anomaly characteristics of geophysical prospecting sections and plane cuts to fix holes,According to the known to unknown principle,Gradually start surveying other planned boreholes in the mining areaAccording to drilling results,The geophysical holes that have been constructed in the study area effectively avoid the hidden karst,The results of geophysical prospecting have been effectively verifiedIt shows that the use of transient electromagnetic method can achieve better results in the exploration of bauxite in karst areaIt can provide method reference for future mineral exploration and hidden karst survey in karst areas
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