Crustal structure in China from teleseismic receiver function

Zhang Pan; Zhu Liangbao; Chen Haopeng; Wang Qingdong; Yang Yinghang

doi:10.3969/j.issn.0253-3782.2014.05.009

Acta Seismologica Sinica > 2014 > 36(5): 850-861. > DOI: 10.3969/j.issn.0253-3782.2014.05.009

Zhang Pan, Zhu Liangbao, Chen Haopeng, Wang Qingdong, Yang Yinghang. 2014: Crustal structure in China from teleseismic receiver function. Acta Seismologica Sinica, 36(5): 850-861. DOI: 10.3969/j.issn.0253-3782.2014.05.009

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Crustal structure in China from teleseismic receiver function

1.
School of Geodesy and Geomatics, Wuhan University, Wuhan 430079, China
2.
Key Laboratory of Geospace Environment and Geodesy, Ministry of Education, Wuhan University, Wuhan 430079, China

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Received Date: November 18, 2013
Revised Date: February 27, 2014
Available Online: October 19, 2021
Published Date: August 31, 2014

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Abstract

Abstract

This paper selects broadband teleseismic waveform data recorded by the China Digital Seismography Network to study the crustal structure in China.The crustal thickness and v_P/v_S ratio are estimated by the grid-search method.The result shows that the v_P/v_S ratio is between 1.6 and 1.9, and the crustal thickness ranges 29—81 km in China.The gradient belt between 100°E and 110°E divided China into eastern and western parts.The crustal thickness beneath eastern China smoothly ranges from 31 km to 36 km, while the crustal thickness in the western part is relatively thick and changed greatly.Crustal thickness ranges from 34 km to 49 km in the middle of China.In general, the crust in Tibetan Plateau is the thickest, reaching 81 km; crustal thickness decreases in Tianshan, Junggar basin and Inner Mongolia and thins out in South China coastal.The average v_P/v_S ratio over China crust is about 1.738 (σ=0.253), which is significantly lower than the average 1.78 (σ=0.269) of global continental crust.The lower v_P/v_S ratio may imply the existence of low velocity zone in the crust or the absence of mafic in China.
- receiver function,
- H-k stacking method,
- crustal thickness,
- v_P/v_S ratio,
- Poisson’s ratio

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References (36)

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Crustal structure in China from teleseismic receiver function

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