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广东河源断裂带地热成因及与构造关系初探
(1.澳大利亚新南威尔士大学矿产与能源资源工程学院, 澳大利亚 悉尼 2052;2.中山大学地球科学与工程学院, 广东 广州 510275;3.广东省地质过程与矿产资源探查重点实验室, 广东 广州 510275;4.广东省有色地质环境中心, 广东 广州 510080)
A PRELIMINARY STUDY ON THE MECHANICS AND TECTONIC RELATIONSHIP TO THE GEOTHERMAL FIELD OF THE HEYUAN FAULT ZONE IN GUANGDONG PROVINCE
(1.School of Minerals and Energy Resources Engineering, University of New South Wales, Sydney 2052, Australia;2.School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, Guangdong, China;3.Guangdong Provincial Key Laboratory of Mineral Resources & Geological Processes, Guangzhou 510275, Guangdong, China;4.Guangdong Nonferrous Geological Environment Centre, Guangzhou 510080, Guangdong, China)
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投稿时间:2018-07-18    修订日期:2019-02-15
中文摘要: 广东省河源断裂带位于中国东南沿海地热异常区,地热资源十分丰富,但其形成机制和利用前景尚不确定。为此文章开展了多学科综合分析,获得以下初步认识:温泉是断裂带内深循环地下水被地温加热而成,断裂剪切热和花岗岩浆残余热的贡献基本可以排除;沿断裂展布的厚层硅化带是古水热活动的产物;硅化带形成时期的挤压应力方向为北东-南西,与河源断裂及河源盆地晚白垩世以来的伸展活动对应,现代构造应力场为北西西-南东东方向挤压,与古应力场相比发生了明显变化;现今构造应力场使得北东向河源断裂呈右旋挤压运动,而北西向断裂则发生左旋张剪,导致地下水循环格局也发生相应改变;目前温泉沿河源断裂呈带分布,沿北西向断裂呈线性溢出,断裂交汇部位是热泉上升的主要通道。总体而言,河源地区拥有令人鼓舞的地热资源及应用前景,有可能达到建设地热发电厂的目标。建议继续深入开展地质学、地球物理、水文地质学和地热成因机理等多学科综合研究,从而更好地定量评价地热潜能与开发前景。
Abstract:Located in the geothermal anomaly area along the southeast coast of China, the Heyuan fault zone in Guangdong Province owns abundant geothermal resources. To investigate its potential, the mechanics and tectonic relationship to the geothermal field of the Heyuan fault zone in Guangdong Province are analysed. It is preliminarily believed that:1) The origin of hot springs is mainly attributed to deep circulation of groundwater along the fault zone heated by the geothermal gradient; the contribution of shear heat and residual heat of granite magma can be eliminated. 2) The thick quartz reef distributed along the fault is the product of the ancient hydrothermal activity. 3) The direction of compressive stress during the formation of quartz reef is NE-SW, corresponding to the extension of the Heyuan fault and the Heyuan Basin since the Late Cretaceous. This is a marked change to the stress direction of the modern tectonic stress field of NWW-SEE. 4) The current tectonic stress field makes the NE Heyuan faults dextral trans-compressional, while the NW faults have left-lateral strike and tension, resulting in a corresponding change in the groundwater circulation pattern. 5) The hot springs are distributed along the Heyuan fault zone and aligned along the NW faults; the intersection of the faults is the channel through which hot springs rise. Overall, the Heyuan area has promising geothermal resources and potential to establish geothermal power plants. It is recommended that further multidisciplinary studies are carried out, including geology, geophysics, hydrogeology and geothermal.
文章编号:     中图分类号:P314    文献标志码:
基金项目:国家重点研发计划(2016YFC0600506);广东省财政厅项目(粤财工2015-632)
引用文本:
Lisa TANNOCK,王亚,李景富,刘洁,张珂,徐力峰,Klaus REGENAUER-LIEB.广东河源断裂带地热成因及与构造关系初探[J].地质力学学报,2019,25(3):400-411DOI:10.12090/j.issn.1006-6616.2019.25.03.037
Lisa TANNOCK,WANG Ya,LI Jingfu,LIU Jie,ZHANG Ke,XU Lifeng,Klaus REGENAUER-LIEB.A PRELIMINARY STUDY ON THE MECHANICS AND TECTONIC RELATIONSHIP TO THE GEOTHERMAL FIELD OF THE HEYUAN FAULT ZONE IN GUANGDONG PROVINCE[J].,2019,25(3):400-411DOI:10.12090/j.issn.1006-6616.2019.25.03.037

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