摘要
通过对贵州省石阡地区地热水、冷泉及河流的地热地质条件、水化学成分及氢氧同位素分析,对该地区的地热水、冷泉及河流的水化学特征、来源及石阡地区的补给模式进行了研究。温泉水属于低中矿化度的弱碱性水;温泉群中阳离子以Ca^2+、Mg^2+为主,阴离子以SO4^2-和HCO3^-为主,研究区水化学类型主要为HCO3-Ca和SO4.HCO3-Ca型。区域内地热水中δ18O值为-9.32‰~-6.81‰,δD为-64.4‰~-44.9‰;冷泉及河流中δ18O值为-7.51‰~-6.00‰,δD为-50.7‰~-38.2‰,均分布在我国大气降水线及当地大气降水线附近,表明该地区主要是大气降水成因。通过H、O同位素计算补给区温度,地热水补给高程,以及冷泉及河流补给高程,推测出补给区可能为袍木寨背斜一带及红石走滑断裂及其断裂束附近的碳酸盐岩裸露地区。氚盈余参数d表明石阡地区大多数地热水埋深较浅,循环径流时间较短,地质环境处于开放与半开放之间,水-岩反应作用相对较弱。
Based on the analysis of geothermal and geological conditions,chemical composition,hydrogen and oxygen isotopes of geothermal water,cold springs and rivers in the Shiqian area,Guizhou Province,this paper studied the hydrochemical characteris-tics,sources and recharge modes.Hot spring water belongs to the weak alkaline water with low and medium salinity.Ca^2+and Mg^2+are the major cations while SO4^2-and HCO3^-are the main anions in hot spring group,and the main hydrochemical types are HCO3-Ca and SO4.HCO3-Ca.The values ofδ18O andδD are-9.32‰-6.81‰and 64.4‰-44.9‰respectively in hot water,and7.51‰-6.00‰and-50.7‰-38.2‰respectively in cold springs and rivers,which are distributed near the atmospheric precipitation line and the local atmospheric precipitation line in China.It is speculated that the recharge area could be the exposed carbonate rock area near the Paomuzhai anticline and the Hongshi strike-slip fault and its fault bundle.Deuterium surplus parameter d indicates characteristics of shallow depth in most geothermal water,short time of circulation runoff,relatively weak water-rock reaction and the geological environment is between open and semi-open in the Shiqian area.
作者
李永康
陈正山
王甘露
LI Yongkang;CHEN Zhengshan;WANG Ganlu(College of Resources and Environmental Engineering,Guizhou University,Guiyang 550025,China;Sichuan Zhide Geotechnical Engineering Co.LTD,Chengdu 610041,China;Guizhou Geology and Mineral Exploration and Development Bureau 117 Geological Brigad,Guiyang 550018,China)
出处
《水文》
CSCD
北大核心
2021年第1期28-34,共7页
Journal of China Hydrology
基金
贵州省理疗温泉(地热水)调查评价项目(2017-02)。
关键词
贵州石阡
地下热水
H、O同位素
氚盈余参数d
补给来源
Shiqian,Guizhou
geothermal water
H and O isotopes
deuterium surplus parameter d
recharge sources
