Abstract: The Shanxi fault depression area is one of the seismic activity belts in China.It is famous for its frequently seismic activities, shallow focal depth and high intensith.The geothermal field characteristics in Shanxi fauit depression area are as follows: In each fault depression basin, the values of terrestrial heat flow and geothermal gradient are higher than the averages of these regions.But in Luliangshan Mountain region and Taiyueshan rolling country, the values are lower.
In the regions of Qingxu, Linfen,Puxian and Liulin,the thermal struture of crust and upper mantle has been suggested.The temperature and heat flow values at the bottm part of sedimentary, granitoids and basalt layers have been estimated to model the two-dimension lithosphere temperature structure of Fushan-Linfen-Puxian geological trannsection.By means of the terrestrial heat flow at Linfen (in the depression basin), Liulin (in the moumtain region) and Qingyuan (in the rolling conuntry), the lithosphere's thichness and bottom temperatuer of these regions have been derived.The geothermal abnormality influences the preparatory process and occurrence of earthquakes.In this paper, the emphasized discussion is on their internal relations.