Rare earth element (REE) concentrations were measured by ICP-MS for groundwater collected from deep seated Taiyuan Fm limestone aquifer (from-400 to-530 m) in Renlou Coal Mine,northern Anhui Province,China.It can be c...Rare earth element (REE) concentrations were measured by ICP-MS for groundwater collected from deep seated Taiyuan Fm limestone aquifer (from-400 to-530 m) in Renlou Coal Mine,northern Anhui Province,China.It can be concluded that the groundwater is warm (34.0-37.2 °C) Cl-Ca,Na type water with circum-neutral pH (7.35-8.28) and high total dissolved solids (TDS,1 746-2 849 mg/L).The groundwater exhibits heavy REEs enrichment relative to light REEs compared with Post Archean Average Shale (PAAS),as well as their aquifer rocks (limestone).The enrichment of REEs is considered to be controlled by terrigeneous materials (e.g.zircon) in aquifer rocks,whereas the fractionation of REEs is controlled by marine derived materials (e.g.calcite),to a less extent,terrigeneous materials and inorganic complexation.The Ce anomalies normalized to PAAS and aquifer rocks are weak,which probably reflects the signature of the aquifer rock rather than redox conditions or pH.The similarities of REE patterns between groundwater and aquifer rocks imply that aquifer rocks play important roles in controlling the REE characteristics of groundwater,and then provide a probability for discrimination of groundwater sources by using REEs.展开更多
The present study analyses the hydro-chemical data of groundwater samples of three different limestone mine sites, which are in close proximity and covers a tract along the Gujarat Coast of Indian peninsula. Higher TD...The present study analyses the hydro-chemical data of groundwater samples of three different limestone mine sites, which are in close proximity and covers a tract along the Gujarat Coast of Indian peninsula. Higher TDS (> 4000 mg/L) and Cl values (> 2000 mg/L) as well as the Chloride: Bicarbonate (HCO3) ratio of more than one clearly support that the sea water intrusion is present in the coastal aquifer at all the three sites. In view of the economic importance of the area and the vulnerability of the coastal aquifer to sea water intrusion recommendations are made for sustainable use of groundwater by the mining companies and other stake holders.展开更多
基金Project(40873015) supported by the National Natural Science Foundation of ChinaProject(08010302062) supported by the Eleventh Five-year Scientific and Technological Program of Anhui Province,China
文摘Rare earth element (REE) concentrations were measured by ICP-MS for groundwater collected from deep seated Taiyuan Fm limestone aquifer (from-400 to-530 m) in Renlou Coal Mine,northern Anhui Province,China.It can be concluded that the groundwater is warm (34.0-37.2 °C) Cl-Ca,Na type water with circum-neutral pH (7.35-8.28) and high total dissolved solids (TDS,1 746-2 849 mg/L).The groundwater exhibits heavy REEs enrichment relative to light REEs compared with Post Archean Average Shale (PAAS),as well as their aquifer rocks (limestone).The enrichment of REEs is considered to be controlled by terrigeneous materials (e.g.zircon) in aquifer rocks,whereas the fractionation of REEs is controlled by marine derived materials (e.g.calcite),to a less extent,terrigeneous materials and inorganic complexation.The Ce anomalies normalized to PAAS and aquifer rocks are weak,which probably reflects the signature of the aquifer rock rather than redox conditions or pH.The similarities of REE patterns between groundwater and aquifer rocks imply that aquifer rocks play important roles in controlling the REE characteristics of groundwater,and then provide a probability for discrimination of groundwater sources by using REEs.
文摘The present study analyses the hydro-chemical data of groundwater samples of three different limestone mine sites, which are in close proximity and covers a tract along the Gujarat Coast of Indian peninsula. Higher TDS (> 4000 mg/L) and Cl values (> 2000 mg/L) as well as the Chloride: Bicarbonate (HCO3) ratio of more than one clearly support that the sea water intrusion is present in the coastal aquifer at all the three sites. In view of the economic importance of the area and the vulnerability of the coastal aquifer to sea water intrusion recommendations are made for sustainable use of groundwater by the mining companies and other stake holders.
