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《Progress In Geophysics》 2005-02
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Determination of the crustal velocity model of Dongsha islands using the inversion of τ-p wave field

ZHOU Long-quan 1, LIU Fu-tian 2, LIU Jin-song 2, CHEN Xiao-fei 1 (1. Department of Geophysics, Peking University, Beijing 100871,China; 2. Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029,China)  
In this paper the inversion of τ-p wave field is adapted for OBS data in order to produce 1-D velocity-depth functions directly. The produce consists of two linear transformations. First, the data are transformed from t-x domain to τ-p domain by the slant stack; Second, the data of τ-p domain are transformed to z-p domain by downward continuation. According to the 1-D velocity-depth functions of five OBS, we synthesize the 2-D crustal velocity structure model of Dongsha islands. In order to check the 2-D velocity model, we fit between the observed and the calculated travel time. The results is satisfied and is preliminary model for tomography.
【Fund】: 国家"863"计划(2003AA611010-01)资助.
【CateGory Index】: P714.8
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