江西吉安钱山地区地热资源特征及热源机制  

Characteristics and Heat Source Mechanism of Geothermal Resources in Qianshan Area of Ji’an,Jiangxi Province

作　　者：张垚垚 刘凯[1] 童珏 何庆成 贺晓龙 贾伍慧 张浩然 王书训 ZHANG Yaoyao;LIU Kai;TONG Jue;HE Qingcheng;HE Xiaolong;JIA Wuhui;ZHANG Haoran;WANG Shuxun(Chinese Academy of Geological Sciences,Beijing 100037;School of Earth Sciences and Resources,China University of Geosciences(Beijing),Beijing 100083;The Fourth Geological Brigade of Jiangxi Geological Bureau,Pingxiang,Jiangxi 337000;School of Environment and Resources,Xiangtan University,Xiangtan,Hunan 411105;College of Geoscience and Surveying Engineering,China University of Mining and Technology(Beijing),Beijing 100083)

机构地区：[1]中国地质科学院,北京100037 [2]中国地质大学(北京)地球科学与资源学院,北京100083 [3]江西省地质局第四地质大队,江西萍乡337000 [4]湘潭大学环境与资源学院,湖南湘潭411105 [5]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《地球学报》2024年第1期39-52,共14页Acta Geoscientica Sinica

基　　金：中国地质调查局地质调查项目(编号:DD20221677-2);中央财政基本科研业务费项目(编号:JKY202004);江西省重点研发计划项目(编号:20203BBG72W011);江西省地质局科技研究项目(编号:2021AA07)联合资助。

摘　　要：位于罗霄山脉北支武功山西南地区的钱山地热田是研究武功山地热资源的关键地区。本文综合区域地质、研究区地质特征、热物性参数、水化学特征、锆石同位素等方法,重点分析了钱山地区的地热系统特征,深入研究了钱山地热的构造背景和热源机制。研究表明:(1)NE–SW向的和平—三江断裂是钱山地热重要的导热和控热构造;(2)水化学及同位素特征指示钱山地区的地热水和冷水均为大气降水补给;(3)早志留世黑云二长花岗岩热导率特征表明花岗岩具有很好的导热效果和聚热能力;(4)黑云二长花岗岩放射性生热率较低且时代久远,揭示放射性元素生热和岩浆岩余热对热源做出的贡献非常小,钱山地热的热源主要来自壳源深部地热。本研究可为武功山地区地热资源成因及合理开发利用等提供重要的启示。The Qianshan geothermal field,located in the southwest of Wugongshan in the north branch of Luoxiaoshan,is the key area to study the geothermal resources of Wugongshan.Based on the methods of regional geology,geological characteristics of the study area,thermal physical parameters,hydrochemical characteristics and zircon isotopes,this paper mainly analyzes the characteristics of the geothermal system in Qianshan area,and deeply studies the tectonic background and heat source mechanism of Qianshan geothermal.The results show that:(1)the Heping–Sanjiang fault in the NE–SW direction is an important thermal conduction and thermal control structure in Qianshan geothermal;(2)The characteristics of water chemistry and isotopes indicate that both geothermal water and cold water in Qianshan area are supplied by atmospheric precipitation.(3)The thermal conductivity characteristics of the Early Silurian biotite monzogranite show that the granite has good thermal conductivity and heat accumulation ability.(4)The radioactive heat generation rate of biotite monzogranite is low with long history,which indicates that the contribution of radioactive element heat generation and magmatic waste heat to heat source is very small, and the heat source of Qianshan geothermal is mainly from the depth of the crust. This study can provide important enlightenment for the genesis and rational development and utilization of geothermal resources in Wugongshan area.

关 键 词：钱山地热 热物性参数 水化学特征 热源机制 武功山 

分 类 号：P314[天文地球—固体地球物理学]