naa a22 4500 510756522 CHVBK 20180411083124.0 cr unu---uuuuu 180411e20131001xx s 000 0 eng 10.1007/s12594-013-0166-8 doi (NATIONALLICENCE)springer-10.1007/s12594-013-0166-8 Effect of mining on geochemistry of groundwater in Permo-carboniferous Gondwana coalfields: Raniganj Basin, India [Elektronische Daten] [K. Adhikari, K. Sadhu, B. Chakroborty, A. Gangopadhyay] Lack of proper reclamation strategy and indiscriminate mining of various economic resources, particularly coal from Permo-carboniferous Gondwana coalfields affects the groundwater quality of the concerned regions. Leaching from mine-tailings along with seasonal fluctuation of water table caused a significant change in groundwater geochemistry of Raniganj coalfield area. Gondwana sequences, developed in intracratonic rift basin, are characterized by numerous longitudinal and cross faults. This results in the formation of many small aquifer systems which may be interconnected laterally as well as vertically providing the conduit for homogenization of aquifers. Although the predominance of major cations (Ca>Na>Mg>K) and anions (HCO3>Cl>SO4>NO3) remain same irrespective of season, the dominance of Na and SO4 have significantly increased in post-monsoon season. The types of groundwater in pre-monsoon and postmonsoon seasons are CaMgCl and CaHCO3 respectively. Leaching of SO4 from surface sources (mine tailings) has increased TDS in post-monsoon. Base exchange (direct and reverse) reactions have taken place between aquifer materials and groundwater. Geological Society of India, 2013 Groundwater nationallicence Mine-tailings nationallicence Seasonal fluctuation nationallicence Leaching nationallicence Gondwana coal fields nationallicence West Bengal nationallicence Adhikari K. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut Sadhu K. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut Chakroborty B. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut Gangopadhyay A. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut Journal of the Geological Society of India Springer India 82/4(2013-10-01), 392-402 0016-7622 82:4<392 2013 82 12594 https://doi.org/10.1007/s12594-013-0166-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s12594-013-0166-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Adhikari K. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut NATIONALLICENCE 700 1- Sadhu K. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut NATIONALLICENCE 700 1- Chakroborty B. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut NATIONALLICENCE 700 1- Gangopadhyay A. Department of Geology, National Institute of Technology, 713 209, Durgapur, India aut NATIONALLICENCE 773 0- Journal of the Geological Society of India Springer India 82/4(2013-10-01), 392-402 0016-7622 82:4<392 2013 82 12594 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer