大地电磁法在新疆阜康地区深层地下水矿化度评价中的应用研究  

The application of magnetotelluric method in the evaluation of deep groundwater salinity in Fukang region of Xinjiang

作　　者：田蒲源[1] 朱庆俊[1] 刘玉星 杨晓光[1] TIAN Pu - yuan ZHU Qing - jun LIU Yu - xing YANG Xiao - guang(China geological survey hydrogeological environment geo｜ogical survey center, Baoding, Hebei,071051, China)

机构地区：[1]中国地质调查局水文地质环境地质调查中心,河北保定071051

出　　处：《地下水》2017年第5期12-14,共3页Ground water

基　　金：中国地质调查局地质调查项目:"准噶尔等盆地二氧化碳地质储存综合地质调查"(121201012000150010)资助

摘　　要：深层地下水勘查的地球物理手段一般包括可控源音频大地电磁测深、大地电磁测深和二维地震勘探等方法。本文以新疆阜康地区深层地下水为研究对象,采用大地电磁法对该区域深部咸水含水层进行识别和评价,探索建立深层地下水矿化度的推算方法。通过分析电阻率值分布特征,并结合地层岩性、孔隙度、地温梯度等影响地层电阻率的重要参数,建立了定量计算地下水矿化度方法。研究结果表明,利用大地电磁法推算深层地下水矿化度的技术勘查方法相对可行,评价结果与已有地下水矿化度资料较为符合。但同时大地电磁法属于粗放的电磁类勘查方法,对地下水矿化度特征进行的是定性分析,勘查精度无法满足地下水矿化度精细分层的需要,在精细勘查中需谨慎采用。研究结果以期给国内同行提供参考。Geophysical methods of deep groundwater exploration generally include methods such as controlled source audio earth electromagnetic sounding, earth electromagnetic sounding and 2d seismic exploration. This paper based on deep groundwater in Xinjiang Fukang area as the research object, uses the magnetotelluric method identification and evaluation of the regional deep saline aquifers, explores the establishment of deep groundwater salinity calculation method. Through the analysis of distribution characteristics of resistivity values, combined with the important parameters affecting the lithology, such as ： po- rosity, geothermal gradient resistivity, and established the groundwater salinity quantitative calculation method. The research results show that using magnetotelluric method calculate deep groundwater salinity technology exploration method relatively fea- sible, the evaluation results is consistent with the existing groundwater salinity data. But at the same time the magnetotelluric method belongs to extensive electromagnetic exploration method, the groundwater salinity characteristics is the qualitative anal- ysis, the survey precision can not meet the needs of groundwater salinity stratification in the fine, careful monitoring should be adopted in fine exploration. The results of this study are expected to provide reference for domestic counterparts.

关 键 词：大地电磁法 电阻率 孔隙度 地温梯度 地下水矿化度 阜康地区 

分 类 号：P641.5[天文地球—地质矿产勘探]