摘要
用有限元方法计算了天水地震区上地壳地温场。结果表明，影响该区浅部（层）地温场的主要因素是基底构造和断裂构造。祁连褶皱系为高热异常区，秦岭褶皱系为低热异常区，西秦岭北缘断裂带为地温梯度带。
The geotemperature field of upper crust in Tianshui earthquake area is calculated by using finite element method. The results show that basement and fault structures are main factors affec ting shallow geotemperature field in this area.Qilian fold system is a high geothermal anomaly area, whereas Qinling fold system, low geothermal anomaly area. And the fault zone along the north edge of West Qinling mountains is a zone with high geothermal gradient.It is considered that the occurrence of historical earthquakes in this zone is related to thermal stress difference.
出处
《西北地震学报》
CSCD
1996年第3期48-53,共6页
Northwestern Seismological Journal
关键词
甘肃
有限元分析
天水地震区
地下热流
Gansu, Finite element analysis,Geothermal field,Geothermal gradient belt,Tianshui earthquake area
