福建漳浦东山地热田基本特征及成因分析

漳浦东山地热田属于中低温地热田Π-2类型,热储呈带状分布,受地形、地层岩性、地质构造等因素影响。地下热水贮存于北东向与北西向断裂的复合部位,控制的可开采量338m3/d,推断的可开采量485m3/d,水温78℃,水质类型为HCO3-·SO42-1—Na＋型,pH值7.40～7.56,偏硅酸含量112.52～117.3mg/L,F离子含量10.99～12.85mg/L,可命名为氟水、硅水,达到理疗热矿水水质标准。

On Genesis and Characteristics of Dongshan Geothermal Field in Zhangpu County,Fujian Province

Zhangpu Dongshan geothermal field belongs to medium low temperature II-2 type geothermal field.Affected by the topography,lithology,geological structure and other factors,Underground hot water stored in the composite parts of NE and NW faults.Recoverable amount of control is 338m3/d and recoverable amount of inference is 485m3/d in Dongshan geothermal field.The water temperature of Dongshan geothermal field is 78℃ and Water quality type is HCO3-·SO42-1-Na＋type.A pH of between 7.40and 7.56,Silicic acid content of between 112.52 and 117.3mg/L and F ion content of between 10.99and 12.85mg/L,It can be named as fluorine and silicon water,to achieve therapeutic hot mineral water quality standards.