西藏日多温泉水化学特征及其物质来源  

Hydrochemical characteristics and material sources of the Riduo thermal spring in Tibet

作　　者：李明礼[1,2] 多吉[1,3] 王祝[2] 邬国栋[2] 姜贞贞[2] 刘高令[2] 

机构地区：[1]成都理工大学地球科学学院,四川成都610059 [2]国土资源部拉萨矿产资源监督检测中心,西藏拉萨850033 [3]西藏自治区国土资源厅,西藏拉萨850033

出　　处：《中国岩溶》2015年第3期209-216,共8页Carsologica Sinica

基　　金：国土资源部公益性行业科研专项资金(201211035)资助

摘　　要：热泉水的水化学特征包含其形成过程中地质、构造、断裂、蚀变以及环境变化等多种信息,是研究地热流体形成和物质来源最基本和最重要的特征之一。西藏日多温泉发育于古新统典中组(E1d)和下白垩统林布宗组(K1l)地层。水化学特征显示:日多温泉地下热储温度为97.5℃~110.1℃之间,pH值为中性,水化学类型为SO4·HCO3-Na型,阳离子以Na+、Ca2+、K+为主,阴离子以Cl-、SO42-、HCO3-为主,并富含HBO2、H2SiO3、F、Li、Sr、Cs、As,矿化度介于1 162mg/L^1 245mg/L之间,符合理(医)疗热矿泉水水质标准。温泉水富含多种矿物组分的特征,与温泉水循环深度大、地下滞留时间较长(推测大于48a)、地下热水与火山岩水-岩作用强烈有直接关系。综合研究热矿水的水化学特征,有助于更好地认识热泉水的形成过程,为热泉资源的开发利用和保护提供科学依据。Hydrochemical characteristics of hot springs include geological,tectonic,fractured,alteration and hydro-environmental change information during the spring’s formation.So hot spring’s hydrochemistry ana-lyze is the most important and basic method for hot spring formation and material source research.The Rid-uo spring is located in Riduo,Lhasa,Tibet.It occurs in Palaeocene Dianzhong Formation （E1 d）and Lower Cretaceous Linbuzong Formation （K1 l）.The hydrochemical characteristics show the spring is neutral water with SO 4 ＆#183;HCO 3 -Na.Its temperature is about 97.5-1 10.1 ℃.The positive ions are mainly Na＋ ,Ca2 ＋ , and K＋ ,while the negative ones are Cl- ,SO 2 -4 ,and HCO 3 - .The degree of mineralization is about 1 1 62-1 245 mg/L,with abundant of HBO 2 ,H 2 SiO 3 ,F,Li,Sr,Cs,and As,meeting the standard of physiother-apy （medical）hot spring quality.The characteristics are directly related to the deep water cycle,long-term underground residence （presumably greater than 48 a）and intense water-rock interaction between the hot water and volcanic rock.Comprehensive study of hot spring’s hydrochemistry help to reveal the hot spring’ s formation,and benefit the recourse rational use and protection.

关 键 词：日多温泉 水化学 理(医)疗热矿泉水 西藏 

分 类 号：P314.1[天文地球—固体地球物理学]