Variations of Moho Depth and Velocity Ratio along and Surrounding the Longmenshan Fault Zone from Tele-Seismic Receiver Functions
详细信息
- 责任者：Long Feng (School of Earth and Space ; University of Science and Technology of China ; Hefei 230026 ; China) ; Ni Sidao
- 刊名：Acta Geoscientica Sinica
- 出版年：2011
- 卷期：32(4)
- 关键词：莫霍间断面 ; Mohorovicic discontinuity ; 接收函数 ; receiver functions ; 龙门山断裂带 ; Longmenshan Fault Zone
- 页码：p.438-446
- 图表：6 illus., 1 table, 37 refs.
- 分类号：0400
- 出版序号：736
- issnNo：ISSN1006-3021
- isbnNo：CN11-3474/P
摘要
///Using tele-seismograms from stations in the region along and surrounding the Longmenshan Fault Zone, the authors stacked receiver functions by means of time-domain iterative deconvolution, further estimated Moho depths beneath the stations through the H-Kappa stacking method, and finally derived the distribution of both the Moho depth and the wave-to-velocity ratio (Vp/Vs), and their errors for the region. The result suggests that the Moho depth distribution has an outline similar to that from previous studies. A preliminary explanation is that the abnormalities of the medium to high Vp/Vs ratios on the Sichuan Basin side and on the Tibetan Plateau side are related to the water-bearing stratigraphic formations beneath the basin and to the low-velocity layers (or the channel flow) in the crust of the plateau, respectively.
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