globalchange  > 气候变化与战略
DOI: 10.1016/j.tecto.2021.228771
论文题名:
Upper mantle velocity and its dynamic significance in the middle-southern segment of the Tan-Lu fault zone
作者: Zhao Q.; Fan X.; He Y.; Zheng L.; Sun Y.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2021
卷: 804
语种: 英语
中文关键词: Tan-Lu fault zone ; Teleseismic tomography ; Upper mantle velocity
英文关键词: Plates (structural components) ; Structural geology ; Lateral heterogeneity ; Low-velocity anomaly ; Pacific plates ; Seismic station ; Tan Lu fault zone ; Teleseismic events ; Upper-mantle velocities ; Velocity gradients ; Velocity ; dynamic analysis ; fault zone ; fold belt ; Pacific plate ; seismic tomography ; subduction ; teleseismic wave ; upper mantle ; velocity structure ; China ; Tan-Lu Fault Zone
英文摘要: 389 teleseismic events recorded by 126 seismic stations were used to study the upper mantle velocity structure of the central-southern segment of the Tan-Lu fault zone (TLF). Results show that (1) the upper mantle velocity presents strong lateral heterogeneity. The TLF is a velocity gradient zone with a depth of 40–120 km, and with a high-velocity anomaly on its west and a low-velocity anomaly on its east. However, at a depth of 300–400 km, the velocity anomalies on both side of the TLF have changed, with a low-velocity anomaly on its west and a high-velocity anomaly on its east. At a depth of 500–600 km, high velocity anomalies are observed on both sides of the TLF, (2) the high velocity anomalies H1 and H2 are located beneath the Dabie fault-fold belt and Lower Yangtze fault block, respectively. The H1 may be the delaminated lithosphere, while the H2 may represent the subduction of the Paleo- Pacific plate. The upper mantle velocity anomalies on both sides of the TLF may reveal the subduction of the Paleo-Pacific plate and the backarc retreat movements. © 2021 Elsevier B.V.
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被引频次[WOS]:2   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170946
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作者单位: Nanjing Tech University, Nanjing, 211816, China; Earthquake Administration of Jiangsu Province, Nanjing, 210014, China

Recommended Citation:
Zhao Q.,Fan X.,He Y.,et al. Upper mantle velocity and its dynamic significance in the middle-southern segment of the Tan-Lu fault zone[J]. Tectonophysics,2021-01-01,804
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