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为了研究华北平原中部地区的深部地壳结构,进行了地壳测深的剖面工作。该剖面西起河北省元氏县,东至山东省济南市郊,全长达270余公里。 全线分布九个爆炸点,构成了相遇和追逐的连续观测系统。根据波的运动学和动力学特点记到了很多一次反射波和一次首波,同时亦存在着多次波。该区地壳分为七个层次,且由高低速相间的介质组成。地壳的平均厚度为35—36公里,上覆介质的平均速度为6.0公里/秒,上地幔顶部介质的层速度为8.1公里/秒。 该区地壳为不均匀的多层结构,并存在着高速梯度夹层。 文中最后给出了地壳和上地幔顶部的综合速度分布和地壳模型。
In order to study the deep crustal structure in the central part of North China Plain, the crustal sounding profile was studied. The cross-section of Yuanshi County, Hebei Province, west of Shandong Province, Jinan suburb, a total length of 270 kilometers. Distribution of nine explosive points across the line, constitute a continuous encounter and chase the observation system. According to the kinematics and dynamics characteristics of the wave recorded a lot of a reflected wave and a first wave, but also there are multiple waves. The crust of the area is divided into seven levels, and by the high-speed and medium-phase composition. The average crustal thickness is 35-36 km, the average velocity of the overburden is 6.0 km / s, and the velocity of the top medium in the upper mantle is 8.1 km / s. The crust in this area is heterogeneous multi-layer structure, and there is a high-speed gradient interlayer. Finally, the paper presents the synthetic velocity distribution and crustal model of the top of the crust and the upper mantle.