岩浆热源型地热系统释义  

Definition of magma-impacted geothermal system

作　　者：郭清海[1,2] GUO Qinghai(State Key Laboratory of Biogeology and Environmental Geology,Wuhan,Hubei 430074,China;School of Environmental Studies,China University of Geosciences,Wuhan,Hubei 430074,China)

机构地区：[1]中国地质大学(武汉)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(武汉)环境学院,湖北武汉430074

出　　处：《地质学报》2022年第1期208-214,共7页Acta Geologica Sinica

基　　金：国家自然科学基金项目(编号42077278,42042036,42111530023,41861134028,41772370,41572335,40702041)联合资助的成果。

摘　　要：以壳内岩浆囊(熔融体)为主要热源的地热系统是国内外地热界的热点研究对象。然而,当前尚无"岩浆热源型"地热系统的确切定义,对此类地热系统的认识也存在诸多争议。本文讨论了岩浆热源型地热系统的形成与其下熔融体的关系,阐释了"岩浆热源"的形成机制及其对上覆地热系统影响的本质,综述了利用岩浆流体地球化学组成识别其对地热水定量贡献的常用方法。在此基础上,提出"岩浆热源型"地热系统应指接受岩浆囊传导热且同时受到岩浆流体直接影响、从而热储温度异常高的地热系统。Geothermal systems with crustal magma chambers as a primary heat source have been a research hotspot in the international geothermal community.Controversially, there is still no exact definition of these geothermal systems strongly affected by underlying crustal magmas. This article deals with a discussion of the relationship between a strictly defined magma-impacted geothermal system and its underlying magma chamber(s), an explanation of the mechanisms involved in the formation of various magmatic heat sources and the nature of their influences on overlying geothermal systems, and a review of the common ways to evaluate the quantitative contributions of magmatic fluids to overlying geothermal waters based on their geochemical compositions. Combining the insights mentioned above, a magma-impacted geothermal system should be referred to as a system with very high reservoir temperatures due to conduction of magma heat and direct input of magmatic fluid.

关 键 词：岩浆热源 地热系统 壳内岩浆囊 岩浆流体 地热水 

分 类 号：P314[天文地球—固体地球物理学]