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《Chinese Journal of Geophysics》 1988-02
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STUDY ON THE LOVE WAVE/RAYLEIGH WAVE INCOMPATIBILITY IN THE PACIFIC OCEAN BASIN

ZHUANG ZHEN(Yunnan University, Kunming, China)TENG TA-LIANG(University of So. California, U.S.A.)  
In this paper the incompatibility of the horizontal shear wave velocity SH with the vertical shear wave velocity SV in the Pacific ocean basin was investigated based on the Love and Rayleigh-wave dispersion inversions. The possible cause of the incompatibility and its relationship to the anisotropy in the Earth were also explored. It is found that SH velocity is greater than SV velocity in almost the entire Pacific lithosphere except for the topmost ten or twenty kilometers where SH velocity is less than SV velocity. In the asthenosphere it is also found that SH velocity is slightly higher than SV velocity for about two thirds of the Pacific. Such broadly existing "Love wave/Rayleigh wave incompatibility" may be an evidence of the intrinsic anisotropy in the Pacific crust and upper mantle associated with the large scale geological and tectonic processes.
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