First multi-scale, finite-frequency tomography illuminates 3-D anatomy of the Tibetan Plateau
作者： Shu-Huei Hung , Wang-Ping Chen , Ling-Yun Chiao , Tai-Lin Tseng
DOI: 10.1029/2009GL041875
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摘要: [1] With a new multi-scale parameterization, 3-D images from finite-frequency seismic tomography, including the very first beneath central Tibet S-waves, reveal that regions of low electric resistivity in crust, previously observed along active rifts southern Tibet, correlate well with P- and S-wave speeds (V). However, such are not interconnected, indicating prevailing south-directed, channel-like crustal flow seems inactive or this popular geodynamic model needs modification. In upper mantle, there is no clear indication regional down-welling between depths 100 to 400 km. Instead, strong, lateral boundary high V extends up 33°N, marking northern limit sub-horizontally advancing Indian lithospheric mantle.
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