J4 ›› 2010, Vol. 40 ›› Issue (2): 342-348.

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Groundwater-Rock Interaction in the Ordos Cretaceous Groundwater Basin：Strontium Isotope Evidence

DONG Wei-hong1, SU Xiao-si1, XIE Yuan2, HOU Guang-cai3, LIU Fu-tian4   

  1. 1.College of Environment and Resources/ Institute of Water Resources and Environment, Jilin University, Changchun 130026, China；2.Chengdu Institute of Geology and Mineral Resources, Chengdu 610081, China；3.Xi’an Institute of Geology and Mineral Resources, Xi’an 710054, China；4.Tianjin Center of Geological Survey, Tianjin 300170, China
  • Received:2009-01-15 Online:2010-03-26 Published:2010-03-26

Abstract:

The mechanism of groundwater-rock interaction in Ordos Creatceous basin has been studied by Strontium isotopic method and hydrochemical analyis, which has been validated by inverse hydrogeochemical modeling. The results show that the main water-rock reactions in Ordos Cretaceous basin are the dissolution of gypsym, minor carbonate minerals and alluminatesilicate minerals and the the dissolution extent of sulfate minerals such as gypsum in northern basin is higher than that in southern basin,but the the dissolution extent of allumi-silicate minerals in southern basin is higher than that in northern basin.Meanwhile, the uncongruent dissolution of carbonate mimerals,i.e,the dissolution of golomite and the precipitation of calcite occurs in sothern basin. The water-rock interaction deduced by the strontium isotope is in accordance with the inverse hydrogeochemival modeling results.

Key words: water-rock interaction, strontium isotope, groundwater, Ordos Cretaceous Artesian basin

CLC Number: 

  • P641.8
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