首页    期刊浏览 2024年12月11日 星期三
登录注册

文章基本信息

  • 标题:A geospatial investigation of interlinkage between basement fault architecture and coastal aquifer hydrogeochemistry
  • 本地全文:下载
  • 作者:P.P. Das ; P.P. Mohapatra ; S. Goswami
  • 期刊名称:Geoscience Frontiers
  • 印刷版ISSN:1674-9871
  • 出版年度:2020
  • 卷号:11
  • 期号:4
  • 页码:1431-1440
  • DOI:10.1016/j.gsf.2019.12.008
  • 语种:English
  • 出版社:Elsevier
  • 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 Antarctica. Current study is based on the hydrogeochemical assessment of this deltaic aquifer system and geospatial analysis thereof, to appreciate the basement structure influence on groundwater chemistry. Major 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 system. Findings of the study indicate a general near surface saline horizon and significant fragmentation of the hydrostatic units. This, 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 faults. To 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 dispositions. While 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.Graphical abstractDownload : Download high-res image (493KB)Download : Download full-size image
  • 关键词:Hydrogeochemistry;Mahanadi;Geospatial;Salinity;Cluster analysis
国家哲学社会科学文献中心版权所有