赣南地热水形成条件分析与赣县区地热水勘查靶区圈定  

Discussion on the Formation Conditions of Geothermal Water in Southern Jiangxi Province and the Target Area of Geothermal Water Exploration in Ganxian District

作　　者：黄长生[1] 侯保全 易秤云 李龙[1,2] 张胜男 周耘 Waseem Akram 王芳婷 HUANG Chang-Sheng;HOU Bao-Quan;YI Cheng-Yun;LI Long;ZHANG Sheng-Nan;ZHOU Yun;Waseem Akram;WANG Fang-Ting(Wuhan Center of China Geological Survey,Wuhan 430205,Hubei,China;Geological Survey of China University of Geosciences,Wuhan 430074,Hubei,China;School of Environmental Studies,China University of Geosciences,Wuhan 430074,Hubei,China)

机构地区：[1]中国地质调查局武汉地质调查中心,武汉430205 [2]中国地质大学(武汉)地质调查研究院,武汉430074 [3]中国地质大学(武汉)环境学院,武汉430074

出　　处：《华南地质》2021年第1期64-74,共11页South China Geology

基　　金：江西省宁都县大塘地热水预可行勘查(工作项目编号:2019006);中国地质调查局项目“清江流域水文地质调查(DD20190824)”。

摘　　要：为巩固脱贫攻坚成果,迈向乡村振兴,赣县人民梦寐以求在赣县探测到地热水资源。本文探讨了赣南山地隆起区构造裂隙地热水形成规律,分析了江西赣南地区地热水形成的条件:①燕山-喜山期岩浆侵入、热液活动是热供给来源;②红层盆地中巨厚的白垩系是储热盖层;③元古代至早古生代浅变质岩分布区岩石受多期次构造运动作用,裂隙发育、岩体破碎,有利于地表水下渗,是地下水的主要补给区;④深大断裂是沟通深部热水汇聚的隔水/导水构造,东西向、北西向、南北向一般断裂与深大断裂形成有利的蓄水构造;⑤受到地球运动和近现代构造应力场作用,赣南地区深层地下水总体由东向西运移,并在张裂型、弯凹型和交叉型三种蓄水构造类型中汇聚。初步建立了赣南地区地热水成因模式,提出赣南地热水分布规律是在南东盘为变质岩或花岗岩、北西盘为红层盆地的北东向深大断裂,并且与其他方向断层交叉部位,或者深大断裂呈弧形并向西凸出的弯凹位置。根据赣县地质特征,提出赣县地热水资源勘查靶区是江口镇河坑村、茅店镇汶潭村和大埠乡头塅村三处。建议采用地下水运移监测、地球物理探测、水文地质钻探等技术手段进行勘查。文章为赣县区实现地热水勘查重大突破提供了科学依据。In order to consolidate the achievements of poverty alleviation and move towards rural revitalization as soon as possible,the exploration of geothermal water resources is the dream of the people of Ganxian.In this paper,the formation conditions of geothermal water in southern Jiangxi Province are analyzed as follows:(1)Mesozoic-Cenozoic magmatic intrusions and hydrothermal activities are the sources of thermal supply;(2)The Cretaceous strata with considerable thickness in red bed basins are the heat storage cap rocks;(3)Proterozoic to early Paleozoic low-grade metamorphic rocks were subjected to multiple tectonic movements,which caused them to be fractured and broken,and become the main recharge areas of groundwater with the most favorable conditions for surface water infiltration;(4)The deep faults are isolated/diversion structures that are the signs of convergence of deep hot water,they and the general faults in east-west direction,north-west direction and north-south direction form favorable water storage structures;(5)The deep groundwater in southern Jiangxi generally moves from east to west due to the actions of earth movement and modern tectonic stress field,and converges in the water storage structures of the split type,the curved-concave type and the cross type.The authors preliminarily established the genetic model of geothermal water in southern Jiangxi.The geothermal water is stored mostly in the NE-directional deep faults in which the south east plate is a metamorphic rock or granite,the northwest plate is a red bed basin,especially at the intersecting with other direction faults,or at the curved and protruding parts to the west of the deep faults.From geological perspective and surface and sub-surface conditions,it is also proposed that the target areas of geothermal water resources exploration in Ganxian County include Jiangkou Town Hekeng Village and Maodian Town Wentan Village,and that groundwater migration monitoring,geophysical exploration,hydrogeological drilling and other technical means shoul

关 键 词：赣南 地热水 深大断裂 蓄水构造 地热水靶区 

分 类 号：P314[天文地球—固体地球物理学]