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引用本文:徐洪飞,周训,王蒙蒙,刘宇,吴艳秋,桌琳杨. 云南泸水登埂与玛布温泉形成特征及成因研究[J]. 中国地质, 2020, 47(6): 1739-1754.
XU Hongfei,ZHOU Xun,WANG Mengmeng,LIU Yu,WU Yanqiu,ZHUO Linyang. Characteristics and origin of the Denggeng and Mabu hot spring in Lushui County, Yunnan Province[J]. Geology in China, 2020, 47(6): 1739-1754(in Chinese with English abstract).
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云南泸水登埂与玛布温泉形成特征及成因研究
徐洪飞1, 周训1,2, 王蒙蒙1, 刘宇1, 吴艳秋1, 桌琳杨1
1.中国地质大学(北京)水资源与环境学院, 北京 100083;2.中国地质大学(北京)地下水循环与环境演化教育部重点实验室, 北京 100083
摘要:
登埂温泉与玛布温泉位于云南泸水市,出露于怒江深切峡谷西岸。研究区分布的主要地层为第四系(Q42)砂土、砾土,石炭系上统卧牛寺组(C3w)玄武岩和三叠系河湾街组下段(T2h1)灰岩。温泉水温为48.9~69.6℃,矿化度为0.493~0.782 g/L,水化学类型分别为HCO3·Ca-Mg型和HCO3·Ca-Na型,为中低温、弱酸性温泉。热水中F-含量为0.78~2.13 mg/L,H2SO3为41.0~70.2 mg/L,含有锂、锶、铷、铯、钡等微量元素。氢氧稳定同位素组成表明研究区温泉补给来源为大气降水,用同位素方法估算温泉的补给区高程为1260~1435 m,补给区温度为6.18~9.02℃,计算的热储温度为100~127.5℃。研究区温泉Ca2+与HCO3-含量较高,占阴、阳离子的毫克当量浓度百分比分别达到60%、82%以上,水中方解石、文石矿物都处于饱和状态,水中CO2含量较高且pCO2远高于大气中pCO2,具有有利于CaCO3沉积的水化学和水动力条件,导致登埂温泉YLS3-1、YLS3-3及YLS3-4和玛布温泉YLS4-1的沉积钙华。登埂温泉与玛布温泉是地下水在怒江西部山区补给区获得大气降水入渗补给,在经历深循环过程中获得深部热流加热后上升在怒江河谷西岸流出地面形成的温泉,是渗入深循环型上升的的中低温温泉。热水在上升过程中与浅部冷水相遇,冷水混入比例为60%~73%,热水循环深度为2375.2~3161.7 m。
关键词:  温泉  水化学  同位素  钙华  成因  水文地质调查工程  泸水  云南
DOI:10.12029/gc20200611
分类号:P314.1
基金项目:国家自然科学基金项目(41772261)资助。
Characteristics and origin of the Denggeng and Mabu hot spring in Lushui County, Yunnan Province
XU Hongfei1, ZHOU Xun1,2, WANG Mengmeng1, LIU Yu1, WU Yanqiu1, ZHUO Linyang1
1.School of Water Resources and Environment, China University of Geosciences(Beijing), Beijing 100083, China;2.MOE Key Laboratory of Groundwater Circulation and Environmental Evolution, China University of Geosciences(Beijing), Beijing 100083, China
Abstract:
Located in the Lushui County of Yunnan Province, the Denggeng hot spring and the Mabu hot spring emerge on the western bank of the Nujiang River valley. Sand of the Quaternary (Q42), basalt of the Upper Carboniferous Woniusi Group (C3w) and limestone of the Lower Formation of Triassic Hewan Group (T2h1) underlie the study area. The temperature of hot springs range from 48.9 to 69.6℃, and TDS from 0.493 to 0.782 g/L. The hydrochemical types of hot water are of HCO3·Ca-Mg type and HCO3·Ca-Na type. The hot springs are of low to moderate temperature and weak acid. The F- concentrations of the hot springs range from 0.78 to 2.13 mg/L, and the H2SiO3 concentrations from 41.0 to 70.2 mg/L. Li, Sr, Rb, Cs and Ba are relatively abundant in the hot water. The values of δ2H and δ18O of the spring water indicate that the hot springs in the study area are meteoric in origin. The elevation of the hot spring's recharge area is estimated to be from 1260 to 1435 m, the temperature of the recharge area varies in the range of 6.18-9.02℃, and the temperature of the geothermal reservoirs varies in the range of 100 -127.5℃. The content of Ca2+ and HCO3- in hot water is rich, and the percentages of milliequivalent concentrations of anions and cations are high, accounting for more than 60% and 82% respectively. Calcite and aragonite in the hot water are in the saturated state, the content of CO2 in water is high and the pCO2 in the hot water is much higher than atmospheric pCO2. The hydrochemical and hydrodynamic conditions are favorable to CaCO3 deposition. Travertines are precipitating near YLS3-1, YLS3-3 and YLS3-4 of the Denggeng hot spring and YLS4-1 of the Mabu hot spring. Thermal groundwater rises up to the land surface on the western bank of the Nujiang River valley after groundwater receives recharge from infiltration of precipitation in the recharge areas of the mountainous areas to the west of the Nujiang River, undergoes deep circulation and obtains heat from heat flow. The hot springs are of the deep infiltration-cycle type and are of low to moderate temperature. The hot water mixes with the shallow cold water when it rises to the land surface. The proportion of mixing cold water is about 60%-73%, and the circulation depth of the hot water ranges from 2375.2 to 3161.7 m.
Key words:  hot spring  hydrochemistry  isotope  travertine  genesis  hydrogeological survey engineering  Lushui  Yunnan