综合物探方法在矿泉水勘查中的应用——以泾县榔桥地区为例

An application study of the comprehensive geophysical prospecting method in the exploration of mineral water:A case study of the Langqiao area,Jing County

安徽省泾县榔桥镇马渡桥村一带具有开发优质矿泉水的巨大潜力,然而受地质条件及含水介质非均质性影响,其分布范围勘定以及水量、水质定量评价一直是影响矿泉水开发利用的难题。基于此,以泾县榔桥地区为靶区开展了地面物探与水文测井联合的综合物探方法应用研究,取得了重要进展,主要包括:(1)通过地面综合物探方法实现了花岗闪长岩中断裂构造的精确定位,通过水文测井实现了构造裂隙水层位的精准识别;(2)成功探明单孔出水量约为50~80 m^(3)/d的偏硅酸型饮用天然矿泉水;(3)指示了区内富水断裂构造为中浅埋深(约75~140 m),走向主要为NW向。研究成果揭示了该区赋存矿泉水构造的空间分布特征,对后续矿泉水范围勘定具有重要意义,同时,泾县榔桥地区综合勘查的研究思路和技术方法具备系统性,对相近地区矿泉水勘查具有指导意义。

The area around Maduqiao Village,Langqiao Town,Jing County has great potential for the development of high-quality mineral water.However,due to the geological conditions and the inhomogeneity of water-bearing media,the investigation of the distribution range of the mineral water in the area and the quantitative evaluation of the water quantity and quality have always been challenges to the development and utilization of mineral water in the area.With the Langqiao area of Jing County as the target area,an application study on the comprehensive geophysical prospecting method that comprehensive ground geophysical prospecting with hydrogeological logs was conducted,achieving important progress.The major results are as follows:(1)The fault structures in granodiorites were precisely located through comprehensive ground geophysical prospecting,and the horizon of tectonic fissure water was precisely identified based on hydrogeological logs;(2)The metasilicate natural mineral water for drinking with a single well water yield of 50~80 m^(3)/d was identified;(3)The water-rich fault structures in the study area have a medium to shallow burial depths of about 75~140 m and primarily have a NW strike.These results reveal the spatial distribution characteristics of the mineral water-bearing structures in the study area and are of great significance to the subsequent investigation of the mineral water range.Moreover,the systematic research philosophy and technical methods used for the Langqiao area of Jing County in this study can guide the mineral water exploration in similar areas.