河北邢束地区地壳上地幔的热作用

Geothermal Action in the Crust and Upper Mantle beneath the Xingtai-Shulu Region of Hebei Province

通过研究邢束地区的地温场、大地热流和其它地球物理资料,对该区的地温场分布、深部结构及其相互关系有了较深入的认识。研究证实:该区地温场具有明显的横向不均匀性,并与地壳上地幔结构有较清楚的对应关系。地温场的分布与构造的关系表明,凸起区与凹陷区相比,前者具有较高的热流值和较大的地温梯度。对该区地震分布与地温场的关系分析以及热应力的数学模拟结果说明,热应力在地震发生过程中具有重要作用。

Based on geothermal data measured in a great deal of drilled holes, heat flow and other geophysical data,the characteristic distribution of thermal field and terrestrial heat flow has been investigated in Xingtai-Shulu region of Hebei Province. Combining with the information of structures of the Crust and upper mantle in the area, the thermal conditions in the crust is analysed. It is found that there is laterally significant inhomogeneity both in crust structure and in geothermal field there is a correlation between them. The uplift area has the higher heat flow and the large thermal gradient than the depression. On this region seismicity is related to the thermal field. Thermal stress in the area is estimated and its relationship with earthquakes is also discussed in the paper.