Crustal and Upper Mantle Velocity and Q Structures of Mainland China
Abstract
Repeated surface wave group velocity measurements over the same paths were made by using large aftershocks of several great (M greater than 7) earthquakes recently occurred in China. Multiple filter technique was applied to the properly rotated three-component digital data from Seismological Research Observatory (SRO) stations, so that both Rayleigh- and Love-wave dispersion data were obtained over a number of path crossing various tectonic provinces of China. In several cases, higher mode data were also derived. An estimate of uncertainty of these dispersion data was obtained from the repeated measurements with identical source-receiver geometry. The generalized surface wave inversion technique was applied to these multi-mode dispersion data, and crustal and upper mantle structures were derived for various tectonic provinces of China. The results clearly demonstrate that the Chinese Mainland is far from being laterally homogeneous, the lateral heterogeneities closely reflect the tectonic developments in the recent past. A particularly unusual crustal and upper mantle structure is found underlying the Tibet plateau.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1979
- Accession Number
- ADA079659
Entities
People
- Ta-liang Teng
Organizations
- University of Southern California