摘要
目前,电磁法已被广泛地应用于地下水勘探中。音频大地电磁测深(AMT)和大地电磁测深(MT)采集频率范围不同,AMT频段高,分辨率高,探测深度小,但效率高,MT频段低,分辨率低,探测深度大,但效率低。在陕北某地区联合开展剖面MT和AMT工作,结合两者的优点和缺点,在兼顾浅部和深部信息的同时,提高了纵向分辨率,提升了工作效率,为今后地下水勘查提供了新的思路。最终得到了可靠的二维电阻率反演模型,获取了地下电性分布特征,并结合地质资料,推断出不同地层的界面及地层的含水性,为开展该地区地下水资源评价提供了科学依据。
The electromagnetic method has been widely used in grounduater exploration currently.Audio magnetotelluric（AMT）and magnetotelluric（MT）have different frequency ranges,of which AMT has high frequency,high resolution,small depth but high efficiency and MT has low frequency,low resolution,great depth but low efficiency.With the combination of advantages and disadvantages in both shallow and deep information at the sametime,this paper attempts to carry out the joint section of MT and AMT work in the Baiyun Mountain area in northern Shanxi,to improve the vertical resolution and work efficiency,which provides a new way of thinking for the future groundwater exploration.Finally,combined with geological data to infer the water interface and formation of different stratum,a reliable 2 Dresistivity inversion mode is obtained and the characteristics of underground electrical distribution are found,which provides a scientific basis for the evaluation of groundwater resources in the area.
作者
徐坤
李小庆
常钰斌
王鹏
王阳玲
欧栋
Xu Kun;Li Xiaoqing;Chang Yubin;Wang Peng;Wang Yangling;Ou Dong(The 2th Comprehensive Geophysical Prospecting Brigade of Shanxi Geological ＆ Mineral Survey Co.,Ltd.,Xian Shnxi 710016,China;Xian North Huian Chemical Co.,Ltd.,Xi＇an Shanxi 710302,C hina;Sichuan Metallurgical Geological Survey Institute,Chengdu Sichuan 610051,China)
出处
《工程地球物理学报》
2018年第3期391-396,共6页
Chinese Journal of Engineering Geophysics
关键词
大地电磁测深
音频大地电磁测深
地下水
电性
magnetotelluric sounding （MT）
audio magnetotelluric sounding （AMT）
groundwater
electric
