中文摘要：

从化温泉位于广州东北部，出露于燕山期花岗岩地区，位于北东向广州一从化断裂带北东段；热水中阳离子以K^＋、Na^＋、Ca^2＋为主，阴离子以HCO3^-为主，水化学类型为HCO3-Na及HCO3-Na·Ca型。利用NETPATH程序对泉区热水进行水化学模拟，发现从化温泉各泉点的水化学特征相似，径流过程中发生的化学反应也相似；从初始水点到终端水点，发生的各种反应交换量很低；在径流过程中各矿物的净反应可能为钾长石、高岭石、赤铁矿、萤石沉淀，CO2、斜长石、黑云母溶解；SiO2的溶解／沉淀在各泉点不同；径流过程中发生了Ca^2＋／Na^＋、Mg^2＋／Na^＋离子交换作用。

英文摘要：

The Conghua hot spring is located to the northeast of Guangzhou. The hot spring spots occur in granites of the Yanshan Period influenced by the NE-trending Guangzhou - Conghua fault. The thermal groundwater is predominated by K^＋ , Na^＋ , Ca^2＋ in cations and HCO3-in anions and is of Na-HCO3 or Na-Ca-HCO3 type. The NETPATH program is used to model the hydrogeochemical reactions along the flow path from the upstream water sample to the hot spring site. The results indicate that the individual springs in the study area have close chemical characteristics with each other and the geothermal groundwater has undergone similar hydrogeochemical reactions. Mass transfers of the reactions from the ＂initial wells＂ to the ＂final wells＂ are relatively low. The net reaction results of the minerals along the path include precipitation of potash feldspar, kaolinite, hematite and fluorite, dissolution of carbon dioxide, plagioclase and biotite. Silicon dioxide behaves differently in different courses and ion exchanges of Ca^2＋/Na^＋ , Mg^2＋/Na^＋ may occur in the courses.