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Hydrochemistry Characteristics of Groundwater from Ordovician Limestone Aquifer in Suxian Coal Mine, Anhui Province, China


Affiliations
1 School of Resources and Civil Engineering, Suzhou University, Anhui Suzhou-234000, China
2 National Engineering Research Center of Coal Mine Water Hazard Controlling, Anhui Suzhou-234000, China
 

Major ions, trace elements and isotope concentrations were measured in water samples collected from Ordovician limestone aquifer and surface rivers in Suxian coal mine district, China. The geochemical characteristics and hydrochemistry process were discussed, and serious results could be obtained: Groundwater samples from Ordovician limestone aquifer were mainly the Na-SO4 and Na-HCO3 types, the similar feature with the river water samples suggesting a certain relationship may be existed between groundwater and surface river water. The total REE concentrations (ΣREE) in groundwater samples varied from 0.0263 to 0.1348 mg/L, with an average value of 0.063 mg/L. The oxidative conditions are the mainly factors deduced the negative Ce anomalies and positive Eu anomalies. The groundwater samples, recharged by the precipitation and surface water, have lower concentrations of δ18O and δD comparing with river water, reflected the river water affected by the evaporation clearly, with the heavy isotope enrichment. The negative correlation between δ18O and TDS and Ca2+ indicated that the dissolution of limestone could be the factor influencing the oxygen isotope characters. Groundwater in Ordovician limestone is runoff from both sides to intermediate, with the Taoyuan coal mine as the subsidence center in study area, evidenced by the contour diagrams of TDS and δ18O. The hydrochemistry field and runoff field of groundwater in study area are mainly controlled by the tectonic field, especially the Sunan syncline.

Keywords

Hydrochemistry, Ordovician Limestone, Groundwater, Isotope, Suxian Coal Mine.
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  • Hydrochemistry Characteristics of Groundwater from Ordovician Limestone Aquifer in Suxian Coal Mine, Anhui Province, China

Abstract Views: 492  |  PDF Views: 225

Authors

Song Chen
School of Resources and Civil Engineering, Suzhou University, Anhui Suzhou-234000, China
Herong Gui
National Engineering Research Center of Coal Mine Water Hazard Controlling, Anhui Suzhou-234000, China

Abstract


Major ions, trace elements and isotope concentrations were measured in water samples collected from Ordovician limestone aquifer and surface rivers in Suxian coal mine district, China. The geochemical characteristics and hydrochemistry process were discussed, and serious results could be obtained: Groundwater samples from Ordovician limestone aquifer were mainly the Na-SO4 and Na-HCO3 types, the similar feature with the river water samples suggesting a certain relationship may be existed between groundwater and surface river water. The total REE concentrations (ΣREE) in groundwater samples varied from 0.0263 to 0.1348 mg/L, with an average value of 0.063 mg/L. The oxidative conditions are the mainly factors deduced the negative Ce anomalies and positive Eu anomalies. The groundwater samples, recharged by the precipitation and surface water, have lower concentrations of δ18O and δD comparing with river water, reflected the river water affected by the evaporation clearly, with the heavy isotope enrichment. The negative correlation between δ18O and TDS and Ca2+ indicated that the dissolution of limestone could be the factor influencing the oxygen isotope characters. Groundwater in Ordovician limestone is runoff from both sides to intermediate, with the Taoyuan coal mine as the subsidence center in study area, evidenced by the contour diagrams of TDS and δ18O. The hydrochemistry field and runoff field of groundwater in study area are mainly controlled by the tectonic field, especially the Sunan syncline.

Keywords


Hydrochemistry, Ordovician Limestone, Groundwater, Isotope, Suxian Coal Mine.

References