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Delineation of Potential Groundwater Zones Using Shear Wave Velocity in Eastern Deccan Volcanic Province, India
Pure and Applied Geophysics ( IF 1.9 ) Pub Date : 2020-10-19 , DOI: 10.1007/s00024-020-02599-6
K. N. S. S. S. Srinivas , P. Pavan Kishore , S. Trupti , K. Satish Kumar , D. Mysaiah , H. V. S. Satyanarayana

A comprehensive study based on Multichannel Analysis of Surface Waves (MASW), a near-surface geophysical technique, was carried out for the first time in the Mandla Lobe of the Eastern Deccan Volcanic Province. The study was conducted to demarcate fractures, which are essential for finding potential groundwater zones in the hard rock region and for the delineation of shallow subsurface geological features in terms of shear wave velocity. The MASW surveys were carried out at different selected locations in the study area to delineate fractures in the basaltic terrain covered with thin weathering and alluvium cover. These basalts are mainly comprised of massive, vesicular and amygdaloidal varieties and interpreted as different basaltic flows of Mandla, Dhuma and Pipardahi formations. The shear wave velocity sections divulge the layered nature of the basalt sequences. In some of the massive flows, there are low-velocity vertical zones that can be deduced to be either vertical columnar joints or fracture zones, and the low-velocity weathered flows can be the good groundwater reservoirs. The shear wave velocities Vs obtained are in the range from 300 to 2500 m/s at different locations, and the thicknesses of flows are varied in the MASW sections. The obtained shear wave data are compared with the borehole data, and the results are well correlated. The study clearly differentiates the variations within basaltic formations, which are interpreted as potential groundwater zones.

中文翻译:

使用剪切波速度在印度东部德干火山省划定潜在地下水区

首次在东德干火山省的 Mandla Lobe 开展了一项基于近地表地球物理技术多道面波分析 (MASW) 的综合研究。进行这项研究是为了划定裂缝,这对于在硬岩地区寻找潜在的地下水区和根据剪切波速度划定浅层地下地质特征至关重要。MASW 调查在研究区的不同选定位置进行,以描绘被薄风化和冲积层覆盖的玄武岩地形中的裂缝。这些玄武岩主要由块状、水泡状和杏仁状变种组成,被解释为 Mandla、Dhuma 和 Pipardahi 地层的不同玄武岩流。横波速度剖面揭示了玄武岩层序的层状性质。在一些巨大的水流中,存在低速垂直带,可以推断为垂直柱状节理或裂缝带,低速风化流可以是良好的地下水库。在不同位置获得的横波速度 Vs 在 300 到 2500 m/s 的范围内,并且在 MASW 截面中流动的厚度是变化的。将获得的横波数据与钻孔数据进行比较,结果具有很好的相关性。该研究清楚地区分了玄武岩地层内的变化,玄武岩地层被解释为潜在的地下水区。存在低速垂直带,可推断为垂直柱状节理或断裂带,低速风化流可作为良好的地下水库。在不同位置获得的横波速度 Vs 在 300 到 2500 m/s 的范围内,并且在 MASW 截面中流动的厚度是变化的。将获得的横波数据与钻孔数据进行比较,结果具有很好的相关性。该研究清楚地区分了玄武岩地层内的变化,玄武岩地层被解释为潜在的地下水区。存在低速垂直带,可推断为垂直柱状节理或断裂带,低速风化流可作为良好的地下水库。在不同位置获得的横波速度 Vs 在 300 到 2500 m/s 的范围内,并且在 MASW 截面中流动的厚度是变化的。将获得的横波数据与钻孔数据进行比较,结果具有很好的相关性。该研究清楚地区分了玄武岩地层内的变化,玄武岩地层被解释为潜在的地下水区。将获得的横波数据与钻孔数据进行比较,结果具有很好的相关性。该研究清楚地区分了玄武岩地层内的变化,玄武岩地层被解释为潜在的地下水区。将获得的横波数据与钻孔数据进行比较,结果具有很好的相关性。该研究清楚地区分了玄武岩地层内的变化,玄武岩地层被解释为潜在的地下水区。
更新日期:2020-10-19
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