摘要
本文在大量钻孔测温资料的基础上,系统分析了平原区浅层地温场分布特征,对影响浅层地温场的多种因素进行了系统研究。该区20～300 m深度内平均地温梯度为7.2℃/100 m,高于北京深部（基岩）地温梯度2.5~3.0℃/100m,大地热流值为66.35~84.14 mW/m2,较高的热流值显示岩石圈相对较薄且存在隐伏断裂。该区现今浅层地温场与深部地温场联系密切,形态分布与平原区重要隐伏活动断裂走向基本一致,主要受新构造运动控制,地下水、岩土体岩性及结构是浅层地温场分布的重要影响因素。
Based on a large number of borehole temperature data,the authors systematically studied the distribution characteristics of the shallow geothermal field in Beijing plain area and several influencing factors.The average geothermal gradient of this area（0~300 m） is 7.2℃/100 m,higher than that of deep bedrock whose geothermal gradient ranges from 2.5 to 3.0℃/100 m.Terrestrial heat flow values range from 66.35 to 84.14 mw2/m2.The relatively high level of heat flow values indicates that the lithosphere is relatively thin and hidden faults are existent.There is a close relationship between the current shallow geothermal field and the deep geothermal field in this area.The distribution of the shallow geothermal field is basically consistent with the strike of major hidden active faults in the plain area,mainly controlled by new tectonic movement.In addition,groundwater and the lithology and structure of rock and soil are also important influencing factors.
出处
《中国地质》
CAS
CSCD
北大核心
2010年第6期1733-1739,共7页
Geology in China
基金
北京平原区浅层地温能资源地质勘查项目(pxm2006-000-043289)
北京市优秀人才培养资助计划(2010D002011000002)资助
关键词
现今浅层地温
地温梯度
影响因素
北京平原区
current shallow geothermal field
geothermal gradient
influencing factors
Beijing plain area
