武汉城市圈地热地质条件分析

Analysis of the Geothermal Geological Conditions of Wuhan City Circle

为更好地开发利用武汉城市圈地热资源,系统总结区内已有的地热勘查资料,并对武汉城市圈地热地质背景进行较全面的论述。在分析该区深部地热地质背景的基础上,从热源、热储、盖层、通道等方面对该区地热地质条件进行总结,居里面的分布与地表的地热异常具有一定的相关性,区内热源主要为地壳岩石放射性元素衰变产热,襄广断裂以北为岩浆岩、变质岩构造裂隙带状热储,襄广断裂以南主要为岩溶热储。其中,咸宁、天门及潜江北部、汉川地区深部寒武系-奥陶系地层具备形成大型岩溶热储的条件。研究成果可为区内各地区地热资源的勘查方向和开发利用提供参考。

In order to better develop and utilize the geothermal resources in Wuhan city circle,this paper summarizes the existing geothermal exploration data in the area,and comprehensively discusses the geothermal geological background of wuhan city circle.Based on the analysis of the geothermal geological background in the deep part of this area,the geothermal geological conditions in this area are summarized from the aspects of heat source,thermal reservoir,caprock and passageway.There is a certain correlation between the distribution of the residents and the geothermal anomalies on the earth’s surface.The heat source in the area is mainly the decay and heat production of radioactive elements in the rocks of the earth’s crust.In the north of Xiangguang fault,there are magmatic rock and metamorphic rock structural fracture zonal heat storage.In the south of Xiangguang fault,there are mainly karst heat storage.Among them,the deep Cambrian Ordovician strata in Xianning,Tianmen,northern Qianjiang and Hanchuan area have the conditions to form large-scale karst thermal reservoir.The research results provide a reference for the exploration direction and development and utilization of geothermal resources in each area.