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Calcium isotope fractionation in a silicate dominated Cenozoic aquifer system

Li, Junxia ; Depaolo, Donald J ; Wang, Yanxin ; Xie, Xianjun

Journal of Hydrology, April 2018, Vol.559, pp.523-533 [Periódico revisado por pares]

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  • Título:
    Calcium isotope fractionation in a silicate dominated Cenozoic aquifer system
  • Autor: Li, Junxia ; Depaolo, Donald J ; Wang, Yanxin ; Xie, Xianjun
  • Assuntos: Silicate System ; Calcium Isotope ; Fractionation ; Groundwater ; Geography
  • É parte de: Journal of Hydrology, April 2018, Vol.559, pp.523-533
  • Descrição: To understand the characteristics of Ca isotope composition and fractionation in silicate-dominated Quaternary aquifer system, hydrochemical and isotope studies ( Sr/ Sr, C and Ca) were conducted on groundwater, sediment and rock samples from the Datong basin, China. Along the groundwater flow path from the basin margin to the center, groundwater hydrochemical type evolves from Ca-HCO to Na-HCO /Na-Cl type, which results from aluminosilicate hydrolysis, vertical mixing, cation exchange between CaX and NaX, and calcite/dolomite precipitation. These processes cause the decrease in groundwater Ca concentration and the associated modest fractionation of groundwater Ca isotopes along the flowpath. The groundwater Ca value varies from −0.11 to 0.49‰. The elevated Ca ratios in shallow groundwater...
  • Idioma: Inglês

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