Receiver function migration image of the deep structure in the Bohai Bay Basin,eastern China
会议名称：《中国科学院地质与地球物理研究所2006学术年会》
会议日期：2007年
学科分类：070904[理学-构造地质学] 0709[理学-地质学] 07[理学]
关 键 词：Bohai Bay Basin Receiver function Migration Mantle transition zone Sediment influence
摘 要：We apply a receiver function poststack migration method to image the crustal and upper mantle structures beneath the Bohai Bay Basin,eastern *** thick sediments of the basin appear to have a substantial influence on the migrated image of the deep *** using the surface reflected PpPs multiples instead of the commonly used Ps converted phases,a curved Moho is coherently imaged,showing a thinned crust of 30 km in the basin area compared with the 40-km thick crust in the west mountain *** incorporating the sedimentary velocity model into migration,both the 410-km and the 660-km discontinuities present a simple structural feature with relatively flat topography within the basin’s interior,although possible local structural complexities may exist at the base of the upper mantle around the boundary areas of the *** mantle transition zone is on average 10-15 km thicker than the global average,reflecting a cold lower upper mantle environment that is distinct from the warm shallow upper mantle of the region.