• 责任者：Qian Hui (Key Laboratory for Continental Dynamics ; Ministry of Land and Resources of China ; Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Jiang Mei
• 刊名：Acta Seismologica Sinica
• 出版年：2011
• 卷期：33(3)
• 关键词：地壳结构 ; crustal structure ; 地幔结构 ; mantle structure ; 天山 ; Tianshan Mountains ; 准噶尔盆地 ; Junggar Basin
• 页码：p.327-341
• 图表：7 illus., 29 refs.
• 分类号：0400
• issnNo：ISSN0253-3782
• isbnNo：CN11-2021/P

///Based on 24904 P-wave arrival time data Tianshan Mountains and in Xinjiang regional seismic network, tomographic images of P-wave velocity are achieved beneath Tianshan‐Junggar region by travel time inversion. The result indicates that the reliability of velocity perturbation recovering is relatively high for the region beneath the two profiles themselves, along Tianshan and eastern Junggar. The result of P-wave velocity perturbations clearly tells the boundary between the high velocity zone in Tianshan terrane and low velocity zone in the basins on both sides of Tianshan. Moreover, the result also reveals the low velocity beneath inner-Tianshan Basin and in the upper mantle. On the tomographic image the authors can see distinguished difference between eastern and western Tianshan. At the depth of upper mantle in Altai area there is a large size high velocity zone, which may be attributed to the intruding of intermediate-basaltic magma. The magmatic differentiation in shallow crust may form hybrid deposits.