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地球与行星物理

ISSN  2096-3955

CN  10-1502/P

Citation: TianYu Zheng, YuMei He, Yue Zhu, 2022: A new approach for inversion of receiver function for crustal structure in the depth domain, Earth and Planetary Physics. http://doi.org/10.26464/epp2022008

doi: 10.26464/epp2022008

A new approach for inversion of receiver function for crustal structure in the depth domain

1 Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences (CAS), Beijing 100029, China

2 Innovation Academy for Earth Science, CAS, Beijing 10029, China

3 University of Chinese Academy of Sciences, Beijing 100049, China

Corresponding author: YuMei He,

Fund Project: This study was financially supported by the National Natural Science Foundation of China (Grant 91755214).

A method for reconstructing crustal velocity structure using the optimization of stacking receiver function amplitude in the depth domain, named common conversion amplitude (CCA) inversion, is presented. The conversion amplitude in the depth domain, which represents the impedance change in the medium, is obtained by assigning the receiver function amplitude to the corresponding conversion position where the P-to-S conversion occurred. Utilizing the conversion amplitude variation with depth as an optimization objective, imposing reliable prior constraints on the structural model frame and velocity range, and adopting a stepwise search inversion technique, this method efficiently weakens the tendency of easily falling into the local extremum in conventional receiver function inversion. Synthetic tests show that the CCA inversion can reconstruct complex crustal velocity structures well and is especially suitable for revealing crustal evolution by estimating diverse velocity distributions. Its performance in reconstructing crustal structure is superior to that of the conventional receiver function imaging method.

Key words: crustal imaging, receiver function, depth domain, inversion
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A new approach for inversion of receiver function for crustal structure in the depth domain

TianYu Zheng, YuMei He, Yue Zhu