重庆市主城区碳酸盐岩地热水的地球化学特征及其医疗价值初探

Geocharacteristics and medical value of carbonate geothermal water in downtown Chongqing

目的分析重庆市主城区碳酸盐岩地热水的物理化学特征及其医疗保健价值。方法通过野外现场测试、采样和实验室测试分析,获取重庆市主城区地热水的物理化学数据并进行相关分析。结果研究区地热水水温为24.5~57.0℃,绝大部分地热水属于弱碱性温水;地热水中主要离子为Ca^(2+)和SO_4^(2-),水化学类型主要为Ca·Mg-SO_4和Ca-SO_4型;锶(Sr)、偏硅酸(H_2SiO_3)、氟(F)、偏硼酸(HBO_2)的质量浓度范围分别为2.0~19.3 mg/L,26.81~53.55 mg/L,0.76~4.00 mg/L,0.08~2.63 mg/L,平均值分别为15.4 mg/L,41.9mg/L,3.2mg/L和1.3mg/L,除个别样点外,地热水中Sr,H_2SiO_3,F及HBO_2的质量浓度均达到医疗价值的浓度标准,具有一定的医疗保健价值。结论重庆市主城区地热水资源丰富、水质良好,可为温泉洗浴、疗养创造良好的条件。

Objective To study the physical and chemical characteristics and medical effects of carbonate geothermal water in downtown Chongqing.Methods Thedataofphysicalandchemicalcharacteristics of carbonate geothermal water in downtown Chongqing was collected and analyzed by field testing,sampling and laboratory testing.Results The temperature of geothermal water of research area was 24.5-57.0 ℃ and most of it was alkalescence warm water;the main ions of the geothermal water were Ca^2＋ and SO4^2- and the main hydrochemical types were Ca·Mg-SO4 and Ca-SO4;the ranges of mass concentration of Sr,metasilicic acid,fluoride and metaboric acid were 2.0-19.3mg/L,26.81-53.55mg/L,0.76-4.00mg/L,0.08-2.63mg/L,the average values were 15.4mg/L,41.9mg/L,3.2mg/L and 1.3mg/L,except for some samples,the mass concentration of Sr,metasilicic acid,fluoride and metaboric acid met medical standards,showing medicinal value.Conclusion The downtown Chongqing has abundant and excellent geothermal water resources,and it creates favorable conditions for hot spring bath and recuperation.