title: [Hydrogen and oxygen isotopes of lake water and geothermal spring water in arid area of south Tibet].
abstract: The condition of water cycles in Tibet Plateau is a complex process, and the hydrogen and oxygen isotopes contain important information of this process. Based on the analysis of isotopic composition of freshwater lake, saltwater lake and geothermal water in the southern Tibetan Plateau, this study investigated water cycling, composition and variation of hydrogen and oxygen isotopes and the influencing factors in the study area. The study found that the mean values of delta18O and deltaD in Daggyaima lake water (-17.0 per thousand for delta18O and -138. 6 per thousand for deltaD), Langcuo lake water (-6.4 per thousand for delta18O and -87.4 per thousand for deltaD) and Dagejia geothermal water (-19.2 per thousand for delta18 and -158.2 per thousand for deltaD) all showed negative delta18O and deltaD values in Tibetan Plateau by the influence of altitude effects. Lake water and geothermal water were influenced by evaporation effects in inland arid area, and the slope of evaporation line was less than 8. Deuterium excess parameters of lake water and geothermal water were all negative. The temperature of geothermal reservoirs in Dagejia geothermal field was high,and oxygen shift existed in the relationship of hydrogen and oxygen isotopes.
authors.forename: Ke
authors.initials: K
authors.lastname: Xiao
authors.forename: Li-Cheng
authors.initials: LC
authors.lastname: Shen
authors.forename: Peng
authors.initials: P
authors.lastname: Wang
mesh_terms: D003903:Deuterium / Q000032:analysis*; D005618:Fresh Water / Q000737:chemistry; D045482:Hot Springs / Q000737:chemistry*; D060106:Lakes / Q000737:chemistry*; D010103:Oxygen Isotopes / Q000032:analysis*; D013696:Temperature; D018609:Tibet
chemical_list: D010103:Oxygen Isotopes; D003903:Deuterium