A geospatial investigation of interlinkage between basement fault architecture and coastal aquifer hydrogeochemistry

作     者：P.P.Das P.P.Mohapatra S.Goswami M.Mishra J.K.Pattanaik P.P. Das;P.P. Mohapatra;S. Goswami;M. Mishra;J.K. Pattanaik

作者机构：ACOASTAmity University HarayanaGurugramIndia Department of GeologyNorth Odisha UniversityOdishaIndia Department of Earth SciencesSambalpur UniversitySamabalpurOdishaIndia Khallikote UniversityBerhampurOdishaIndia Centre for Geography and GeologyCentral University of PunjabBhatindaIndia 

出 版 物：《Geoscience Frontiers》 (地学前缘（英文版）)

年 卷 期：2020年第11卷第4期

页      面：1431-1440页

核心收录：

学科分类：081803[工学-地质工程] 08[工学] 0818[工学-地质资源与地质工程] 

主　　题：Hydrogeochemistry Mahanadi Geospatial Salinity Cluster analysis 

摘      要：The Mahanadi delta,deposited on a series of horst and graben basement structures,is considered an extension of the East Lambert Rift of *** study is based on the hydrogeochemical assessment of this deltaic aquifer system and geospatial analysis thereof,to appreciate the basement structure influence on groundwater *** ion chemistry of subsurface waters portrays a distinct saline contamination across the terrain and varied regimes of water types,specifically with respect to southern and northern parts of this aquifer *** of the study indicate a general near surface saline horizon and significant fragmentation of the hydrostatic ***,in turn,implies noteworthy influence of formational water to salinity regimes and basin structural changes for the escape of these waters to surroundings.A plot of recent low intensity earthquakes displays proximity of epicenters to the faults as well as striking similarity to the trend of terrestrial faults indicating multiple reactivations of the *** further corroborate the above findings,spatial pattern analysis of individual hydrochemical variables is carried out which reveals specific clusters of sources(groundwater mixing)and sinks(groundwater dispersion) in proximity to basement fault *** the faults can be disregarded as conduits or barriers owing to their great depth,the overlying sedimentary mass,particularly,the horizons with significant clayey content have been distorted due to post rift subsidence and fault reactivations.A proximity analysis of ionic clusters points towards a greater influence of longitudinal faults to that of the transverse ones on groundwater mixing or dispersion.