安徽皖南地区构造盆地及深大断裂地热潜力研究
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摘要
皖南地区地热资源较为丰富,地下热水露头9处,其中7处沿着研究区北东向深大断裂及其次生断裂带出露,2处在具有断裂发育的构造盆地出露,说明区域地热与深大断裂和构造盆地关系密切。根据已有资料统计和已出露地热的特征,将皖南地区的地下热水赋存模型概括为断裂带状热储和构造盆地带状兼层状热储两种概念模型。皖南地区主要为中低温地热,研究区已出露地热多位于地温梯度较高处,一般位于莫霍面和居里面深度较浅的部位。对区域内15个调查点进行大地热流值计算,一般为40~80m W/m2。通过对深大断裂和构造盆地的地球物理解译分析,划分了断裂带状地热潜力区和构造盆地带状兼层状地热潜力区。具有地热潜力的深大断裂主要有高坦断裂、汤口断裂、岭-盘断裂、旌德断裂、绩溪断裂;具有地热潜力的构造盆地为宣广盆地、沿江盆地和绩溪盆地。
The southern Anhui Province is the region being rich in geothermal resources. There are 9 hot springs of geothermal water,among them 7 hot springs exposed along with east-north deep faults and its sec-ondary fault zones,and 2 hot springs exposed at the tectonic basins with developed fractures,which show that regional geothermal energy has close relationship with the deep fault and tectonic basin.According to the ex-isting data statistics and geological structural characteristics of the exposed hot springs,geothermal storage can be classified into two main conceptual models in the southern Anhui Province: the fault belt model and zon-al and stratified tectonic basin model.Mid-low temperature geothermal energy mainly distributes in the south-ern Anhui Province,the exposed hot springs in the study area mainly were located at the position with high geothermal gradient and at the shallow position of Moho and Curie surface.Terrestrial heat flow values at fif-teen survey points in the area were calculated,and they are 40 to 80 m W/m2 usually.The geothermal potential zone of fault belt and that of zonal and stratified tectonic basin were classified through the geophysical inter-pretation analysis on the deep fault and tectonic basins.Gaotan fault,Tangkou fault,Ling-Pan fault,Jingde fault and Jixi fault are the deep faults with geothermal potential.Xuanguang basin,Yanjiang basin and Jixi basin are the tectonic basins with geothermal potential.
The southern Anhui Province is the region being rich in geothermal resources. There are 9 hot springs of geothermal water,among them 7 hot springs exposed along with east-north deep faults and its sec-ondary fault zones,and 2 hot springs exposed at the tectonic basins with developed fractures,which show that regional geothermal energy has close relationship with the deep fault and tectonic basin.According to the ex-isting data statistics and geological structural characteristics of the exposed hot springs,geothermal storage can be classified into two main conceptual models in the southern Anhui Province: the fault belt model and zon-al and stratified tectonic basin model.Mid-low temperature geothermal energy mainly distributes in the south-ern Anhui Province,the exposed hot springs in the study area mainly were located at the position with high geothermal gradient and at the shallow position of Moho and Curie surface.Terrestrial heat flow values at fif-teen survey points in the area were calculated,and they are 40 to 80 m W/m2 usually.The geothermal potential zone of fault belt and that of zonal and stratified tectonic basin were classified through the geophysical inter-pretation analysis on the deep fault and tectonic basins.Gaotan fault,Tangkou fault,Ling-Pan fault,Jingde fault and Jixi fault are the deep faults with geothermal potential.Xuanguang basin,Yanjiang basin and Jixi basin are the tectonic basins with geothermal potential.
引文
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[4]汪集旸,庞中和,胡圣标,等.地热学及其应用[M].北京:科学出版社,2015.
[5]徐世光,郭远生.地热学基础[M].北京:科技出版社,2009.
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[7]苏媛媛.豫东下古生界地热资源潜力评价[J].山东煤炭科技,2017(6):185-187.
[8]黄江华,王少龙.安徽省西北部地热资源与开发远景评价[J].上海地质,2010,31(增):247-250.
[9]刘飞,汪龙虎,洪江生.浅论安徽巢湖半汤地热田成因及径流通道问题[J].地质学刊,2008,32(3):172-178.
[10]潘国林.安徽省地热资源特征及远景区划[J].中国地质灾害与防治学报,2011,22(2):130-134.
[11]夏琼,张春雷,高雅,等.合肥市地热资源现状及可靠性评价[J].安徽地质,2015,25(3):222-226.
[12]闫岩,张迪,赵国春,等.内蒙古自治区地热资源分布特征与潜力评价[J].干旱区资源与环境,2017,31(10):51-57.