怒江跃进桥温泉水化学特征及成因分析

Chemistry Characteristics and Formation Analysis of Hot Spring on Yuejinggiao of Lu River

跃进桥温泉为上升泉群,其热水化学类型为HCO3-Ca型。根据δD、δ18O稳定同位素分析温泉水源为大气降水;δ18O稳定同位素确定其补给高程为2 050 m;3H放射性同位素确定温泉水的年龄为(10～20)a。跃进桥温泉的热源来自区域高热流背景,称嘎断裂、F1断裂起到导热导水作用,其成因模式为大气降水补给的断裂渗入循环型中、低温地热系统。

Yuejingqiao hot spring is Rise Springs.The hot water chemical type is HCO-3-Ca2＋.According to analysis of the stable isotope δD,δ18O,source of the hot spring water is mospheric water;δ18O stable isotopes determine that the supply elevation is 2 050 m.The 3H radioactive isotope recognizes the age of hot springs water as（10~20） years.The heat of the springs comes from the area of high heat flux background,Chengka and F1 faults play the role of thermal and water conductivity.The formatiion model is low-temperature geothermal systems which the atmosphere water recharge and infiltration circular by fault.