广东惠州花岗岩体及其地热意义  

Granite Intrusion in Huizhou,Guangdong Province and Its Geothermal Implications

作　　者：旷健 祁士华[1,2] 王帅[2] 肖志才 张敏 赵旭 甘浩男 Kuang Jian;Qi Shihua;Wang Shuai;Xiao Zhicai;Zhang Min;Zhao Xu;Gan Haonan(State Key Laboratory of Biogeology and Environmental Geology,China University of Geosciences,Wuhan 430074,China;School of Environmental Studies,China University of Geosciences,Wuhan 430074,China;Team 935 of Guangdong Nonferrous Metals Geological Bureau,Huizhou 516001,China;Petroleum Engineering and Geophysics Co.,Ltd.,SINOPEC,Wuhan 430223,China;Institute of Hydrogeology and Environmental Geology,Chinese Academy of Geological Sciences,Shijiazhuang 050061,China)

机构地区：[1]中国地质大学生物地质与环境地质国家重点实验室,湖北武汉430074 [2]中国地质大学环境学院,湖北武汉430074 [3]广东省有色金属地质局九三五队,广东惠州516001 [4]中石化石油工程地球物理有限公司,湖北武汉430223 [5]中国地质科学院水文地质环境地质研究所,河北石家庄050061

出　　处：《地球科学》2020年第4期1466-1480,共15页Earth Science

基　　金：中国地质调查局地调项目(No.1212011220014);国家地热资源及中等城市地下空间开发利用示范城市项目。

摘　　要：为洞悉东南地区地热的形成演化,以惠州黄沙洞-石坝地区高温地热田为例,综合地震学、岩石地球化学、锆石U-Pb年代学等方法来解译该地热田的形成模式.研究区岩体主要为燕山期高分异高含产热元素的I型花岗岩,形成背景为古太平板块俯冲的前进与后撤;深部花岗岩体连为一体且厚度达3.5 km.高导热率的花岗岩促进地幔热传导至地表和花岗岩中放射性元素衰变产生的热量是惠州高温地热形成的两大重要原因.研究区深部花岗岩生热量及干热岩地热资源储量巨大.研究区地热产出模式对惠州乃至东南地区的能源供给系统有重大意义.In this paper,it presents a case study of the high-temperature geothermal field in Huizhou,China to interpret the formation model of this geothermal field and that of Southeast China by integrating seismics,geochemistry and the zircon U-Pb age.It is found that the magmatic intrusion in the study area is mainly Yanshanian I-type granite with high differentiation and high heat-producing elements,which has been formed by the subduction and the retreat of Paleo-Pacific Plate.The subterranean magmatic intrusion is an integrated whole with thickness up to 3.5 km.The heat transfer from the mantle to the surface promoted by the high thermal conductivity of granite,and the heat generated by radioactive element decay in granite are two important causes for high temperature geothermal formation in Huizhou.The subterranean granite in the study area has high heat production and inestimable geothermal resources of hot dry rock.The geothermal output model of this study area is of great significance to the energy supply system in Huizhou and even the Southeast China.

关 键 词：地热 地震反演 燕山期花岗岩 古太平洋板块 产热 东南地区 地热田 

分 类 号：P314.9[天文地球—固体地球物理学] P315.2[天文地球—地球物理学]