Qingdao Geological Exploration Institute, General Administration of Metallurgical Geology of China

针对潍坊浮烟山地区勘查过程中,断裂构造与地热显示、地热异常的关系,控热构造、热储层,地热异常区的地质结构、热储岩性及埋深、地温梯度、水温和水量等尚未解决的问题,通过遥感地质解译、物探、化探、水文地质调查、民(机)井水温调查发现了大柳树和符山两个水温异常区,确定了地温梯度,推断沂水-汤头断裂和鄌郚-葛沟断裂为主要的导热、控热构造,并与白垩系青山群厚度较大的粉砂岩、砂岩、凝灰岩、玄武岩及白垩系王氏群、古近系五图群、新近系临朐群形成了良好热储层;通过综合的地质分析建立了浮烟山地区的地热模型,对地热资源进行了估算。浮烟山地区地热形成的主要原因是地球物质中所含放射性元素衰变产生了热量,由两条深大断裂传导到地热载体岩溶裂隙水中,最终形成了浮烟山地热异常。

Aiming at the unresolved issues in the exploration process of Fuyanshan area in Weifang, including the relationship between fault structures, geothermal display, and geothermal anomalies, thermal control structure, thermal reservoir layers, as well as the geological structure, thermal reservoir lithology, burial depth, geothermal gradient, water temperature, water volume of the geothermal anomaly area and so on, through remote sensing geological interpretation, geophysical exploration, geochemical exploration, hydrogeological investigation, and civil (mechanical) well water temperature investigation, two water temperature anomaly areas, Daliushu and Fushan, are discovered, the geothermal gradient is determined, and it is inferred that the Yishui-Tangtou Fault and the Tangwu Gegou Fault are the main thermal conductivity and thermal control structures, and they form good thermal reservoir layers with thicker siltstone, sandstone, tuff, and basalt of the Qingshan Group of the Cretaceous, and the Wangshi Group of the Cretaceous, the Wutu Group of the Paleogene, and the Linqu Group of the Neogene; a geothermal model for Fuyanshan area is established through comprehensive geological analysis, and the geothermal resources are estimated. The main reason for the formation of geothermal in Fuyanshan area is the decay of radioactive elements in Earth's material, which generates heat and is transmitted to the karst fissure water of the geothermal carrier through two deep faults, ultimately forming the Fuyanshan geothermal anomaly.