Thermal Process in the Crust and Upper Mantle in Xingtai-Shulu area of Hebei Province,China

Study of geothermal field data,terrestrial heat flow values,and other geophysical data from the Xingtai-Shulu area of Hebei Province made us more understanding of the distribution of geothermal fields and deep structures and their interrelation.The study illustrates that the geothermal field has an apparent lateral inhomogeneity and is evidently correlated by the structure of the crust and upper mantle in the area.The relation of the geothermal field distribution to the structure indicates that in comparison with the depression zone,the uplift zone has a higher heat flow value and a larger geothermal gradient.The analysis of the relation between distribution of earthquake epicenters and geothermal field and mathematical simulation of thermal stress in the area suggests that thermal stress plays an important role in the process of earthquake generation.

河北邢束地区地壳上地幔的热作用

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。