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介绍在腾冲地区完成的由一条近南北方向纵测线和两条近东西向的非纵测线组成的人工地震测深工程以及对纵测线资料解释的初步结果。上地壳的平均速度为 5 94km s ,其底界面深度为 12km左右 ;下地壳的平均速度为 6 6 7km s ,顶界面深度为 2 3km左右 ;中地壳可分为 2层 ,平均速度为 6 17km s ;纵测线的平均地壳厚度为 40km。在团田至腾冲之间的基底速度相当低 (5 80km s)。在腾冲与固东之间的中地壳界面有局部上拱现象。局部地区的地壳速度偏低以及壳内界面上拱可能与岩浆活动有关。
The artificial seismic sounding project composed of a near-north-south longitudinal insolation line and two near-east-west non-insolate lines completed in Tengchong area and the preliminary results of interpretation of in-line data are introduced. The average velocity of the upper crust is 5 94 km 2 and the depth of the bottom interface is about 12 km. The average velocity of the lower crust is 6 6 7 km 2. The depth of the top boundary is about 23 km. The middle crust can be divided into 2 layers with an average velocity of 6 17 km s; the mean crust thickness of the longitudinal line is 40 km. The substrate velocity between Tada and Tengchong is quite low (5 80 km s). There is a local arching at the crust interface between Tengchong and Gudong. The low crustal velocity in some areas and the arches in the shell may be related to magmatic activities.