Physics
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010georl..3706304h&link_type=abstract
Geophysical Research Letters, Volume 37, Issue 6, CiteID L06304
Physics
5
Seismology: Tomography (6982, 8180), Seismology: Body Waves, Seismology: Theory, Tectonophysics: Dynamics Of Lithosphere And Mantle: General (1213), Tectonophysics: Tectonics And Magmatism
Scientific paper
With a new multi-scale parameterization, 3-D images from finite-frequency seismic tomography, including the very first images beneath central Tibet from S-waves, reveal that regions of low electric resistivity in the crust, previously observed along active rifts in southern Tibet, correlate well with regions of low P- and S-wave speeds (V). However, such regions are not interconnected, indicating that a prevailing south-directed, channel-like crustal flow seems inactive or this popular geodynamic model needs modification. In the upper mantle, there is no clear indication of regional down-welling between depths of 100 to 400 km. Instead, a strong, lateral boundary between high and low V extends up to 33°N, marking the northern limit of sub-horizontally advancing Indian lithospheric mantle.
Chen Wang-Ping
Chiao Ling-Yun
Hung Shu-Huei
Tseng Tai-Lin
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