Uppermost mantle structure beneath eastern China and its surroundings from Pn and Sn tomography

Weijia Sun; B. L.N. Kennett

doi:10.1002/2016GL068618

Uppermost mantle structure beneath eastern China and its surroundings from Pn and Sn tomography

Weijia Sun^*, B. L.N. Kennett

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

24 Citations (Scopus)

Abstract

The Pn and Sn residuals from regional events provide strong constraints on the structure and lithological characteristics of the uppermost mantle beneath eastern China and its surroundings. With the dense Chinese Digital Seismic Network in eastern China, separate Pn and Sn tomographic inversions have been exploited to obtain P and S velocities at a resolution of 2° × 2° or better. The patterns of P velocities are quite consistent with the S velocities at depth of 50 and 60 km, but the amplitude of P wave speed anomalies are a little larger than those of S wave speed. The low P wave speed, high S wave speed, and low V_p/V_s ratio beneath the northern part of Ordos Basin are related to upwelling hot material. Abrupt changes in material properties are indicated from the rapid variations in the V_p/V_s ratio.

Original language	English
Pages (from-to)	3143-3149
Number of pages	7
Journal	Geophysical Research Letters
Volume	43
Issue number	7
DOIs	https://doi.org/10.1002/2016GL068618
Publication status	Published - 16 Apr 2016

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title = "Uppermost mantle structure beneath eastern China and its surroundings from Pn and Sn tomography",

abstract = "The Pn and Sn residuals from regional events provide strong constraints on the structure and lithological characteristics of the uppermost mantle beneath eastern China and its surroundings. With the dense Chinese Digital Seismic Network in eastern China, separate Pn and Sn tomographic inversions have been exploited to obtain P and S velocities at a resolution of 2° × 2° or better. The patterns of P velocities are quite consistent with the S velocities at depth of 50 and 60 km, but the amplitude of P wave speed anomalies are a little larger than those of S wave speed. The low P wave speed, high S wave speed, and low Vp/Vs ratio beneath the northern part of Ordos Basin are related to upwelling hot material. Abrupt changes in material properties are indicated from the rapid variations in the Vp/Vs ratio.",

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T1 - Uppermost mantle structure beneath eastern China and its surroundings from Pn and Sn tomography

AU - Sun, Weijia

AU - Kennett, B. L.N.

PY - 2016/4/16

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N2 - The Pn and Sn residuals from regional events provide strong constraints on the structure and lithological characteristics of the uppermost mantle beneath eastern China and its surroundings. With the dense Chinese Digital Seismic Network in eastern China, separate Pn and Sn tomographic inversions have been exploited to obtain P and S velocities at a resolution of 2° × 2° or better. The patterns of P velocities are quite consistent with the S velocities at depth of 50 and 60 km, but the amplitude of P wave speed anomalies are a little larger than those of S wave speed. The low P wave speed, high S wave speed, and low Vp/Vs ratio beneath the northern part of Ordos Basin are related to upwelling hot material. Abrupt changes in material properties are indicated from the rapid variations in the Vp/Vs ratio.

AB - The Pn and Sn residuals from regional events provide strong constraints on the structure and lithological characteristics of the uppermost mantle beneath eastern China and its surroundings. With the dense Chinese Digital Seismic Network in eastern China, separate Pn and Sn tomographic inversions have been exploited to obtain P and S velocities at a resolution of 2° × 2° or better. The patterns of P velocities are quite consistent with the S velocities at depth of 50 and 60 km, but the amplitude of P wave speed anomalies are a little larger than those of S wave speed. The low P wave speed, high S wave speed, and low Vp/Vs ratio beneath the northern part of Ordos Basin are related to upwelling hot material. Abrupt changes in material properties are indicated from the rapid variations in the Vp/Vs ratio.

KW - Pn

KW - Sn

KW - V/V

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KW - tomography

KW - uppermost mantle

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DO - 10.1002/2016GL068618

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

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ER -

Uppermost mantle structure beneath eastern China and its surroundings from Pn and Sn tomography

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