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《Chinese Journal of Geophysics》 1990-05
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CRUST-UPPER MANTLE P WAVE VELOCITY STRUCTURE BENEATH NORTHERN CHINA

CHEN LI-HUA SONG ZHONG-HE (Institute of Geophysics, State Seismological Bureau, Beijing)  
In this paper,the crust and the upper mantle velocity structure beneath northern China has been studied by the use of near-by earthquake P wave information.Based on the regional tectonic feature,the region is divided into four parts.The result show: there are obviously difference among P wave velocity structures beneath every regions,the crust and upper mantle low velocity layer exist in seismically active area and not in steady area.Authors consider that the existence of the lateral hetergoentity of P-wave structure and low velocity layer may be mainest feature of tectonic active area.
【Fund】: 地震科学联合基金
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