| 广东惠州花岗岩体及其地热意义 |
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| 引用本文： | 旷健,祁士华,王帅,肖志才,张敏,赵旭,甘浩男.广东惠州花岗岩体及其地热意义[J].地球科学,2020,45(4):1466-1480. |
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| 作者姓名： | 旷健 祁士华 王帅 肖志才 张敏 赵旭 甘浩男 |
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| 作者单位： | 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 |
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| 基金项目： | 中国地质调查局地调项目1212011220014 |
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| 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.
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| 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 |
| 收稿时间： | 2019-05-29 |
Granite Intrusion in Huizhou,Guangdong Province and Its Geothermal Implications |
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| Abstract: | 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. |
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