五龙背热矿泉水化学特征

五龙背热矿泉水为高氟热水,除含有通常的地下水常规组分外,还含有F~-、SiO_2等特殊组分,水质类型为重碳酸钠型。气体成分有CO_2、O_2、N_2,其体积百分含量比仍在大气降水含量比范围内。地下热水中的F~-、Na~+、SiO_2、CO_3~(2-)、SO_4~(2-)、pH值、矿化度等与水温呈正相关;Ca~(2+)、Mg(2+)、HCO_3~-以及硬度与水温呈负相关。地下热水化学组分主要来源于围岩,即地下热水对围岩的溶解、水解、溶滤作用,使围岩化学组分进入地下热水中所致。在不同的温度条件下,或地下热水形成的不同阶段,存在着不同的水化学平衡。F~-、SiO_2可作为五龙背热矿泉型地下热水的水化学标志。

HYDROCHEMICAL CHARACTERS OF WULONGBEI HOT SPRING

Wulongbei hot spring to belong to hot water with high fluorine content contains not only usual composition of groundwater but also special composition F~- and SiO_2 etc. , which is a sodium bicarbonate spring The volume percentage of contents including CO_2,O_2,N_2, not exceed atmospheric precipitation. The relation is positive correlation between the water temperature and some factors such as F~-, Na~+, SiO_2, CO_3~(2+), SO_4~(2-), pH value, and mineralization intensity, however, isnegative correlation between the temperature and other factors such as Ca~(2-), Mg~(2+), HCO_3~-and hardness. The chemical composition of hot spring mainly originated from country rocks. That introduced into hot spring from country rocks because of action of solution hydrolysis and filtration. There are difference hydrochemical equilibrium under the difference temperature or diffe rence stages toform hot spring. F~- and SiO_2 can used hydrochemical marks to prospect fon Wulongbei-type hot spring.