摘要
通过分析娘子关泉域岩溶水的水文地球化学特征 ,发现沿流动路径上硫酸根质量浓度逐渐降低 ,矿化度逐渐降低 ,Ca2 + ,Mg2 + 与SO2 -4 比值逐渐升高等特征 .运用水岩作用的地球化学模拟软件模拟得出 ,广泛出露分布的中陶统灰岩因含石膏而使地下水在补给—径流区和地下浅部即含有高硫酸根 ,沿流动路径上在汇流区—排泄区地下水不断有侧向补给及与深部水的混合 ,而表现出硫酸根质量浓度逐渐降低 ;同时个别特高硫酸根的井水为石炭—二叠系中水污染中奥陶统含水层造成的 .相对而言 ,深部下奥陶统含水层的水质较好 .
The hydro geochemical research into the karst water of Niangziguan spring area indicates the gradual decrease both in the concentration of sulfate and in the mineralization degree, but the gradual increase in the ratios between Ca 2+ , Mg 2+ and SO 2- 4 along the flow path. The hydro geochemical modeling shows that the widely dissolving of gypsum causes the high concentration of gypsum from recharge area to discharge area, and even at the shallow aquifer. In addition, the mixing with deep water and sidewise water from the runoff to the discharge area reduces the concentration of sulfate in the water. The extraordinarily high concentration of sulfate was initiated by the pollution by the seepage from the Carboniferous-Permian where the oxidation of sulfide produced much higher sulfate in the Middle Ordovician aquifer. The water from the Lower Ordovician aquifer would be much better.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2000年第5期467-471,共5页
Earth Science-Journal of China University of Geosciences
基金
国家自然科学基金重点项目!(No .495 72 15 9和No .4983 2 0 0 5 )
国家攀登计划项目专题!( 95 -预 -3 9)
关键词
岩溶水
污染
硫酸盐
水文地球化学
模拟
karst water
pollution
sulfate, hydro geochemistry
modeling.
