水文地质工程地质2017，Vol.44Issue(4)：15-22,8.DOI:10.16030/j.cnki.issn.1000-3665.2017.04.03
西昌市尔乌泉域泉水水文地球化学特征及成因
Hydrogeochemical characteristics and genesis of springs in the catchment area of the Erwu spring of Xichang
摘要
Abstract
Springs and/or spring groups are primary groundwater resources for local people in towns and villages in the southwest Sichuan Province.A study of hydrogeochemical characteristics and genesis of spring water is of scientific value and realistic significance to the local people.Chemical components,oxygen and hydrogen and tritium isotopes of the springs and surface water in the catchment area of the Erwu spring of Xichang are combined to identify the hydrogeochemical characteristics and genesis of the spring water.The chemical components analyses show that the spring waters with low TDS are neutral to weak alkalinity groundwater,and are of HCO3-Ca · Mg and HCO3 · SO4-Ca · Mg types.The chemical components of the surface waters are similar to those of the spring waters.The hydrogen and oxygen isotopes illustrate that the spring waters and surface waters are of meteoric origin,and there is no isotope shift of oxygen.Moreover,tritium isotopes demonstrate that the spring waters originated from meteoric waters,and experienced a long runoff time.local fault and fold structure are helpful in leading to interaction between the meteoric water and carbonate,gypsum of clastic rocks,and the cation exchange with clay minerals of Quaternary sediments subsequently occurs,which results in the major chemical constituents of Ca2+,Mg2+,HCO3-and SO42-in the spring waters.In addition,some water samples with high concentrations of Na + and SO42-can be interpreted by the influence of sewage and chemical fertilizers.关键词
泉域/水文地球化学特征/氢氧同位素/水岩相互作用/成因Key words
catchment area of a spring/hydrogeochemical characteristics/oxygen and hydrogen isotopes/water-rock interaction/genesis分类
天文与地球科学引用本文复制引用
袁建飞,邓国仕,徐芬,唐业旗..西昌市尔乌泉域泉水水文地球化学特征及成因[J].水文地质工程地质,2017,44(4):15-22,8.基金项目
中国地质调查局项目(12120114030301,DD20160286) （12120114030301,DD20160286）
国家自然科学基金项目(41502245) （41502245）
