关键词: 接收函数, 阵列反卷积, 地壳上地幔结构

Abstract:

       A data set of 1876 three-component, P wave seismograms from 22 stations deployed at Ordos and Taihang mountains
was collected to investigate crust and upper mantle structure of that area. By using the array deconvolution method, the vertical,
radial, and tangential receiver functions of all events are obtained. All radial receiver functions are then migrated to produce a
seismic image. The image shows that from Ordos to Bohai Bay basin, the crust becomes thinner from about 52 km to 37 km, and the Moho generally dips to the west at a small angle. In central part of Ordos basin, the crust is thickest, reaching 52 km; at the eastern edge of Ordos, the thickness decreases to 43 km. From Taihang Mountain to Bohai Bay basin, the thickness of the crust changes from 45 km to 37 km. Under the Shanxi Graben, the Moho suddenly uplifts by approximately 8-10 km in comparison to that of both sides, and the rise of the Moho and the depression of the surface show a mirror-image relationship.

Key words: receiver function, array deconvolution, crustal and upper mantle structure