A Study Of Hydrogen And Oxygen Stable Isotopes Of The Hot Springs In Nonthwestern Yunnan

The northwest of Yunnan Province is a region with rich geothermal resources,and the formation of hot springs is of great theoretical significance.In the study of isotope of thermal groundwater,some studies have been carried out on the use of radioactive isotopes for the determination of groundwater age and judgment of heat storage temperature and mixed hot and cold water.Little is known about the hydrogen and oxygen stable isotopes in the hot springs in northwestern Yunnan.From 2013 to 2015,65 water samples were collected from Mangkang County in Tibet to Baoshan City ofYunnan Province.The water samples include hot spring water,salt water,salty spring water and salt water,mainly the hot spring water.Based on the ?2H and ?18O data of thewater samples,the spatial andtemporal changes in ?2H and ?18O and their influencing factors in the northwest of Yunnan are analyzed.The results show that ?2H and ?18O values of water samples tend to decrease from south to north.The relationship of the global precipitation and ?2H,?18O values of the water samples in the study area show that the springs is of meteoric origin.Therefore,the factors that affect ?2H and?18O values in the atmospheric precipitation are also the factors that affect ?2H and?18O values in the thermal groundwater.The ?2H and ?18O values of the water sampes range from-68 of the No.36 water samples to-145.5‰ Baoshan Longling(YL1),respectively.(XZQZK),-16.7‰,the change range of ?2H value is more obvious than that of ?18O value.The ?2H,?18O values of the national contour map and the study area of underground hot water ?2H,?18O value of the contour map can be seen from the southeast of our coastal areas to the northwest of the mainland,showing ?2H,?18O values of the more The ?2H and ?18O values in the southwestern China are negligible.The terrain of the study area is large and there is no law.From the study area In the hot spring,the ?2H,oxygen isotope values and the height of the hot spring sampling point can be seen in the elevation of the sampling point elevation of 3443 meters to the hot springs ?2H and?18O values were-130.3‰ and-16.2‰,and sample elevation of 1267 meters Lapel Spa ?2H and Oxygen The ?2H and ?18O values in the hotspots of the study area were negatively correlated with the recharge elevation of the hot spring sampling points,and the negative correlation was calculated by the elevation effect.Because the summer area is affected by the southwest monsoon in summer,the ?2H and ?18O values in the thermal groundwater are generally higher than those in winter.