天水地震区深部地温场的有限元计算  

CALCULATION OF DEEP GEOTEMPERATURE FIELD IN TIANSHUI EARTHQUAKE AREA BY FINITE ELEMENT METHOD

作　　者：董治平[1] 郭守年[1] 蒋梅[1] 刘宝勤[1] 张立光 

机构地区：[1]国家地震局兰州地震研究所

出　　处：《西北地震学报》1996年第3期48-53,共6页Northwestern Seismological Journal

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.

关 键 词：甘肃 有限元分析 天水地震区 地下热流 

分 类 号：P314.2[天文地球—固体地球物理学]