兰州市城区地热地质条件及资源开发潜力分析  

Analysis of geothermal geological conditions and resources exploitation potential in Lanzhou City

作　　者：魏林森 张凌鹏 王婷 励丽 WEI Linsen;ZHANG Linpeng;WANG Ting;LI Li(The Second Institute of Geology and Mineral Exploration,Gansu Provincial Bureau of Geology and Mineral Resourse,Lanzhou,730020 China)

机构地区：[1]甘肃省地矿局第二地质矿产勘查院,兰州730020

出　　处：《中国地质调查》2018年第2期45-50,共6页Geological Survey of China

基　　金：甘肃省地质勘查基金"甘肃省兰州市城区地热资源普查(编号:2017-D21)"项目资助

摘　　要：兰州市城区地处民和—兰州坳陷盆地东端的中生代断陷盆地内。盆地中因沉积巨厚碎屑岩,加之受多期地质构造运动改造,断裂构造发育,为地热水的形成创造了条件。经勘探证实,兰州城区属中低温(60~90℃)沉积盆地型地热资源,分布范围受盆地南、北2条深大断裂控制,面积约530 km2。按照地质构造单元,分3个区块对地热资源潜力进行了评价,东部城区、中部城区和西部城区地热田产能分别为17.91 MW、117.46 MW和23.49 MW,达到中—大型地热田规模,显示出良好的开发利用前景。Lanzhou City is located in Mesozoic faulted basin of the eastern Minhe-Lanzhou depression basin.Due to the thick sedimentary rocks and the well developed faults from multi-period tectonic movements in the basin,this area is in favorable condition for geothermal water formation.Through exploration confirmation,the geothermal resources of Lanzhou City are the sedimentary basin type of middle-low temperature(60 to 90℃).The distribution of the geothermal resources of about 530 km 2 is mainly controlled by two deep faults in the north and south of the basin.According to the partition of the geological structure units,the authors have evaluated geothermal resources exploitation potential of the three blocks in the east,the middle and the west of the city.The results show that the productivities of the geothermal fields in the three blocks are 17.91 MW,117.46 MW and 23.49 MW respectively.So these fields can be regarded as the middle-large scale geothermal fields,with better prospects for development and utilization.

关 键 词：地下热水资源 地质条件 兰州市城区 

分 类 号：P314[天文地球—固体地球物理学]