Study on Crust and Upper Mantle Structure in Shandong Area

被引：0

作者：

Qu P. ^{[1
]}

Lü J. ^{[1
]}

Guo Z. ^{[2
]}

Yu Y. ^{[2
]}

Chen Y. ^{[2
]}

机构：

[1] School of Earth and Space Sciences, Peking University, Beijing

[2] Department of Ocean Science and Engineering, Southern University of Science and Technology, Shenzhen

来源：

Beijing Daxue Xuebao (Ziran Kexue Ban)/Acta Scientiarum Naturalium Universitatis Pekinensis | 2020年 / 56卷 / 04期

关键词：

Crust thickness; Receiver function; Shear-waves splitting; Tanlu fault zone; Wave velocity ratio of P and S;

D O I：

10.13209/j.0479-8023.2020.039

中图分类号：

学科分类号：

摘要：

This paper records seismic data, using the broadband seismic station and the state seismic station in Shandong Province. Receiver function and shear-waves splitting are applied to study the earth's crust and upper mantle structure beneath Shandong and its adjacent area. This study analyzed the crust thickness distribution of the region, distribution of crustal average P and S wave velocity ratio, and the regional distribution of shear wave splitting delay. It can be seen that the range of crust thickness in Shandong region is 28-39 km. The crustal thickness of the northern and southern sections of the Jiaonan uplift is less than 32 km. The crustal thickness of Jiyang depression on the north side of west Shandong uplift is also within 32 km. The lithosphere below the western Shandong uplift is relatively thicker. The velocity ratios of P and S in the study area are mainly distributed in the range of 1.67-1.94. In the southwest part of the Luxi uplift and the northern part of the Jiaonan uplift, the wave velocity ratio of P and S is less than 1.75, which may be caused by the thickening of the middle and upper crust, and the thinning and subsidence of the lower crust. The difference between velocity ratio of P and S in the north and south of the west uplift reflects the difference of crustal activity. The anisotropy of mantle material indicates that crust thinning and subsidence in the west of Shandong region may still be ongoing. © 2020 Peking University.

引用

页码：649 / 658

页数：9

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