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沿塔里木盆地中部的库车—塔中—塔南测线,首次进行了地震转换波测深。探测结果表明,本区岩石圈具有明显的层状-块体结构,地壳厚度40~50km,隆起区约为40km,凹陷区约为50km。上地壳的厚度在盆地中部明显减薄,中地壳波速相对偏高(VP=6.4~6.5km/s),下地壳上部普遍存在低速薄层,结晶地壳的速度高于周围青藏高原和天山地区的波速,波速结构表明地壳具有陆壳性质,地壳内存在具有逆冲性质的深部断裂。综合解释认为,自新生代以来,在印度-欧亚板块边界的强大挤压力作用下,岩石圈内包括结晶基底面和莫霍面在内的各深部界面(岩层)的准同步挠曲变形和地壳刚性块体沿深部逆冲断裂的调整运动,是塔里木盆地岩石圈中主要的深部动力学过程。
Along the Kuche-Tazhong-Tainan line in the central part of the Tarim Basin, the seismic wave conversion was performed for the first time. The results show that the lithosphere in this area has obvious layered-block structure with crustal thickness of 40-50 km, uplift area of about 40 km and depression area of about 50 km. The thickness of the upper crust is significantly thinner in the middle of the basin, and the velocity of the middle crust is relatively high (VP = 6.4 ~ 6.5km / s). Low velocity thin layers are generally found in the upper crust, and the crustal velocity is higher than that of the surrounding Qinghai- The wave velocity and velocity structure in the Tianshan area indicate that the crust has the continental crust, and the crust has deep faults with thrusting properties. According to the comprehensive explanation, since the Cenozoic, under the strong compressive force of the India-Eurasian plate boundary, the quasi-synchronous flexural deformation of various deep interfaces (rock formations) including the crystal basal plane and the Moho in the lithosphere And the adjustment movement of the crustal rigid blocks along the deep thrust faults are the main deep kinetic processes in the lithosphere of the Tarim Basin.