Geochemical Characteristics of Barium in Furong Epikarst Ecosystem in Chongqing

Through analyzing the Ba2+ concentrations in bedrock and soil,and monitoring the barium concentrations in spring water,soil infiltrating water and drip water out/in Furong cave,Chongqing,China,the geochemical characteristics of Barium in Furong epikarst ecosystem were studied.The concentration of Ba2+ was low in all types of karst ecosystem out/in Furong cave.There were obvious differences among the concentration of Ba2+ in bedrock,soil and epi-water.The ratio of barium to calcium in drip water and spring water were between the ratio in soil and bedrock,which were relevant to the local climate change.Thus the barium concentrations in epikarst ecosystem could not only indicate obvious differentiation in the process of migration among bedrock,soil and water,but also reflect the information of the drip water formation.