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本文计算并讨论了当地球内部有热脉动事件发生时非稳态的热作用模型及其对地热场和大地热流的影响。理论计算和实际资料表明,构造活动区和稳定地区应有不同的热作用过程,在构造活动区地壳内的低速,低阻层和上地幔的低速,低阻层的埋藏深度之差与该地的热活动史有一定的对应关系。如华北平原地区,观测的二层深度差为40—60公里,推测热脉动持续时间为40百万年,活动史为50—70百万年:而银川盆地二层间隔为36—40公里,活动史为30—40百万年。
This paper calculates and discusses the unsteady thermal model and its effect on the geothermal field and the geothermal flow in the earth when there are thermal pulsations. The theoretical calculation and actual data show that there should be different thermal processes in the tectonic active area and the stable area. The difference between the buried depth of the low-velocity and low-resistivity layers in the low-velocity, low-resistivity and upper mantle in the crust of the tectonically active area is similar to that of the low There is a certain correspondence between the history of hot activities. For example, in the North China Plain, the observed depth difference between the two floors is 40-60 km. It is estimated that the duration of the thermal pulsation is 40 million years and the activity history is 50-70 million years: while the interval between the two floors of the Yinchuan Basin is 36-40 km, Activity history is 30-40 million years.