The upper mantle shear wave velocity structure beneath northeast asia based on waveform modeling of the upper mantle triplications
Understanding upper mantle velocity structures can help us understand the mantle temperature and composition distri-bution and provide clues for geodynamics study.We study the upper mantle velocity structure beneath northeast Asia,based on S trip-lication data of two earthquake events in East Asia,recorded by China Digital Seismogragh network.The modeling results of these two events show that both models have a low-velocity zone above 250 km,and a high-velocity zone at the lower part of the mantle transition zone,which suggests the influence of the Pacific subduction slab in this area.The thickness of the mantle transition zone of both mod-els is the same as PREM because the influences of the slab near the two discontinuities are different.
upper mantlevelocity structureupper mantle triplicationEast Asia
国家科技期刊平台
NSTL
万方数据
维普
