基于水文地球化学特征的黄河流域（济阳段）地热水成因机制研究

Study on Genetic Mechanism of Geothermal Water of the Yellow River Basin (Jiyang Section) Based on Hydrogeochemical Characteristics

摘要:

黄河流域（济阳段）地热资源丰富，阐明地热田的成因机制对区域地热水资源的开发利用和黄河流域高质量发展具有重要意义。以黄河流域（济阳段）齐广断裂以南灰岩热储为研究对象，进行水化学分析和同位素分析，结果表明研究区地热水水化学类型主要为SO4·ClCa·Na型、SO4Ca·Na型、HCO3·SO4Ca·Mg型、SO4Ca型，地热水总体上受大气降水的入渗补给，地热水补给区高程范围为497.81~2117.97m，地热水属于亚现代与近期补给的混合水和现代水。

Abstract:

The Yellow River Basin (Jiyang Section) is rich in geothermal resources. It is of great significance to elucidate the genetic mechanism of geothermal fields and the exploitation and utilization of regional geothermal water resources for high-quality development of the Yellow River basin. Taking thermal reservoir of limestone in the south of Qiguang fault in the Yellow River basin (Jiyang section) as the research object, hydrochemical analysis and isotope analysis have been carried out. It is showed that hydrochemical types of geothermal water in the study area are mainly SO4·Cl-Ca·Na type, SO4-Ca·Na type, HCO3·SO4-Ca·Mg type and SO4-Ca type. The geothermal water is generally replenished by the infiltration of atmospheric precipitation, and the elevation range of the geothermal water recharge area is 497.81~2117.97m. The geothermal water belongs to the mixed water of submodern and recent replenishment and modern water.