【摘要】 应用新疆区域台网记录的地震资料,结合前人对新疆速度结构研究的结果作为初始模型,利用地震层析成像的方法反演了天山中部地壳及上地幔三维速度结构。三维图像结果显示:天山中部地区波速呈现出不均匀性,45 km深度以上各层波速表现出高速性质,45 km以下的区域波速却表现出低速性质;纬向剖面显示出0~40 km深度范围内波速起伏较大,而40 km深度以下速度相对稳定。更多还原

【Abstract】 Appling the earthquake data recorded by Xinjiang regional station net and uniting the result the front experts studied for the velocity structure of Xinjiang as the initial model,we used the seismic tomography method to inverse the 3-D velocity structure of earth’s crust and upper mantle of middle Tianshan.The result of 3-D image showed that the wave velocity appeared non-uniformity in the middle area of Tianshan.The wave velocity of every layer above the depth of 45 km is high,while one below the depth of 45 km is actually low.The wave velocity of lengthways section plane showed that the fluctuation of it was big in the depth from 0～40 km.However,it was relatively stable below the depth of 40 km.更多还原