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小波分析方法用于地震宽角反折射资料处理 ,它可将地震信号的分辨率由传统的1 /2— 1 /4λ(波长 )提高到优于 1 /6λ .利用小波分析方法对沙雅—布尔津地震宽角反折射剖面资料进行处理 ,发现天山造山带的壳幔过渡带由 7— 8个高低速相间的薄层构成 ,平均速度较低 ,总厚度约 2 0km .而塔里木盆地北缘与准噶尔盆地的壳幔过渡带不具有这一特点 ,壳幔间主要以一级间断面实现过渡 .天山造山带与准噶尔盆地壳幔过渡带详细结构及其二者之间的差异特征为天山造山带地球动力学“层间插入消减模型”的建立提供了重要依据
The wavelet analysis method is applied to seismic wide-angle refraction data processing, which can improve the resolution of seismic signals from the traditional 1 / 2- 1 / 4λ (wavelength) to better than 1 / 6λ. Using wavelet analysis, The wide-angle refractivity profile of the Burqin earthquake was processed and it was found that the crust-mantle transitional zone of the Tianshan orogenic belt consists of 7 to 8 high and low velocity interphase thin layers with low average velocities and a total thickness of about 20 km. The northern margin of the Tarim Basin And the crust-mantle transition zone of Junggar Basin does not have this characteristic, and the transition between crust and mantle mainly takes the first-grade discontinuity.The detailed structure of the crust-mantle transitional zone between the Tianshan orogenic belt and the Junggar basin and the difference between the two are characterized by the Tianshan orogenic It provides an important basis for the establishment of “inter-layer insertion subtraction model” with geodynamics