中国地质2023，Vol.50Issue(6)：1621-1631,11.DOI:10.12029/gc20220323004
青藏高原如角高温地热系统构造-热耦合成热模式
Structure-thermal coupling model of the high temperature geothermal system in Rujiao on the Xizang Plateau
摘要
Abstract
This paper is the result of geothermal survey engineering. [Objective]There are two reasons for the formation of surface thermal anomaly:abnormal heat source and abnormal heat transfer mode.The coexistence of"Thick Crust"and"Hot Crust"is the biggest difference between the high temperature geothermal system on the Xizang Plateau and the common convergent plate margin geothermal system.Partial melting(Hotsource)is an abnormal heat source in the"HotCrust",and fracture system(Structure)is a convective heat transfer channel in the"Thick Crust".Clearly depicting the spatial relationship between the two and exploring the structural-thermal coupling model of heat generation may be an important approach to improving the characteristic heat generation theory of the Xizang Plateau under the coexistence of a"Thick crust"and a"Hot crust".[Methods]This study takes the Rujiao Boiling Spring in Saga County as an example,and uses magnetotelluric sounding and audio magnetotelluric sounding.[Results]To explore the spatial relationship between the fault system and partial melting;we combined with previous studies on geophysics,geochemistry and fluid dynamics,established Rujiao boiling spring structure-thermal couplingthermal model;and set up two production wells with the intersection of the fault system as the target.[Conclusion]The Rujiao tectonic-thermal coupled model of heat generation has universal applicability,which is of great significance for improving the formation theory of characteristic heat in the Xizang Plateau and enhancing the success rate of geothermal exploration.关键词
构造-热耦合成热模式/如角沸泉/高温地热系统/地热成因机制/地热勘查实践/地热地质调查工程/青藏高原Key words
construct-thermal coupled model/Rujiao boiling spring/geothermal mechanism/geothermal exploration practice/geothermal survey engineering/Tibet Plateau分类
天文与地球科学引用本文复制引用
郭镜,唐发伟,官辉,赵海华,赵小云,旦增国杰,杜炳锐..青藏高原如角高温地热系统构造-热耦合成热模式[J].中国地质,2023,50(6):1621-1631,11.基金项目
四川省科技计划项目应用基础研究面上项目(2019YJ0269)、中国地质调查局项目(DD20190033)、西藏自然资源厅项目(54000021210200001054)联合资助. Supported by the applied basic research project of Sichuan Science and Technology Program(No.2019YJ0269) （2019YJ0269）
the project of China Geological Survey(No.DD20190033)and the project of Xizang Natural Resources Department(No.54000021210200001054). （No.DD20190033）
