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沿乌鲁木齐-库尔勒350余公里长的测线上完成了穿越天山的地震转换波野外观测,得出天山造山带的深部构造剖面图和壳内P,S波速度结构模型.天山的结晶地壳可分为4层,各层的速度分别是:Vp值为5.9,6.3,6.6,6.9km/s;Vs值为3.2,3.5,3.7,3.9km/s。上地幔顶部的波速:Vp值为8.10km/s。Vs值为4.6km/s。天山地区的地壳厚度为42-56km,中天山最厚,达到50-56km。地壳中部存在低速透镜体。探测结果表明,天山大地构造可分为北天山、中天山和南天山3个区,其地壳深部构造特征各不相同。用颤动构造理论来解释天山造山带的形成机制和演化较板块构造理论更为合理。
The seismic conversion wave field through the Tianshan Mountains has been completed along the survey line of over 350 km in Urumqi-Korla. The deep tectonic section and the P and S wave velocity structures in the Tianshan orogenic belt have been obtained. Tianshan crystalline crust can be divided into four layers, the velocity of each layer is: Vp value of 5.9,6.3,6.6,6.9km / s; Vs value of 3.2,3.5,3 .7, 3.9km / s. Wave velocity at the top of the upper mantle: Vp value of 8.10 km / s. Vs value is 4.6km / s. The Tianshan area has a crustal thickness of 42-56 km, the tallest in the Tianshan Mountains, reaching 50-56 km. There is a low-speed lens in the middle of the crust. The results show that the Tianshan tectonic structure can be divided into three zones, namely North Tianshan, Middle Tianshan and South Tianshan, with different crustal tectonics. It is more reasonable to explain the formation mechanism and evolution of the Tianshan orogenic belt with the tectonic theory of tremor than that of plate tectonics.