广东惠州—从化典型地热田水文地球化学特征及成因分析  

Hydrogeochemical characteristics and genesis of typical geothermal fileds from Huangshadong to Conghua in Guangdong

作　　者：闫晓雪 甘浩男 岳高凡[1] YAN Xiaoxue;GAN Haonan;YUE Gaofan(The Institute of Hydrogeology and Environmental Geology, Chinese Academy of Geological Sciences, Shijiazhuang, 050061)

机构地区：[1]中国地质科学院水文地质环境地质研究所,石家庄050061

出　　处：《地质论评》2019年第3期743-754,共12页Geological Review

基　　金：中国地质调查局项目(编号:DD20160191);国家自然科学基金资助项目(编号:41741018)的成果~~

摘　　要：本文通过对广东惠州至从化典型中低温对流型热水和冷水的水化学特征和同位素数据的分析,研究了热水的补给来源及其经历的深部地热过程。研究区热水均起源于大气降水,黄沙洞热水具有循环深度大,径流时间长,水岩反应强烈的特点,使其获取了更高的热量;从化热水具有滞留时间短,交替作用强,水岩反应较弱的特点。综合分析惠州黄沙洞热水循环深度为2600～4000m,冷水混合比例为62%～92%,储层温度为125～180℃;从化热水循环深度为1700～3200 m,冷水混合比例为48%～89%,储层温度为90～150℃。This article analyzes the origin and the deep circulation process of low-to-medium temperature geothermal fields distributed within the Huangshadong and Conghua thermal fields in Guangdong Province, basic on the analysis of the hydrochemical characteristics and isotope data of the hot water and cold water in the study area. The thermal groundwater is originated from meteoric precipitation. The Huangshadong thermal field has the characteristics of a deeper circulation, longer cycle period, and smaller cycle rate, which allows it to obtain more heat from the surrounding rock. The Conghua thermal fields have the characteristics of short retention time, strong alternation and weak water-rock reaction. Both thermal fields in study area have two reservoirs, the temperature of shallow reservoir in Huangshadong thermal field is about 125 ℃, with the depth of the thermal cycle is about 2600 m;the temperature of deep reservoir is about 180℃, with the depth of the thermal cycle is about 4000 m. The temperature of shallow reservoir in Conghua thermal field is about 90 ℃, with the depth of the thermal cycle is about 1700 m;the temperature of deep reservoir is about 150℃, with the depth of the thermal cycle is about 3200 m.

关 键 词：地球化学 氢氧同位素 热储温度 硅焓混合模型 

分 类 号：P314[天文地球—固体地球物理学]