Crustal Structure of the Hubei Region Based on H-κ-c Method
Abstract We collect 189 high signal-to-noise ratio teleseismic waveform events with epicenter distance of 30°-90° and magnitude of 5.5 and above of Hubei digital seismic network recorded during 2016-2019 to extract the receiver functions(RFs) by the time domain deconvolution method, and obtain the high-resolution images of crustal thickness (H) and VP/VS (κ) by using the H-κ-c method with the harmonic corrections on Ps and its crustal multiples (PpPs, PsPs+PpSs) in P-wave receiver functions. The results show that the crustal thickness of Hubei region shows the structural feature of thick in the west and thin in the east. The thinnest crustal thickness in the Jianghan basin is only about 30 km. The crustal thickness is slightly higher than 35 km, with a velocity ratio greater than 1.73 in the Dabie mountain area, which may be related to the two periods of strong sinistral translation of Tan-Lu fault zone during the late Triassic and late Jurassic, as well as the upwelling of mantle thermal material and magma intrusion into the crust in the southern section of Tan-Lu fault zone.
Key words :
receiver function
H-κ-c stacking
crustal thickness
velocity ratio
Cite this article:
LIU Qian,ZHAO Rui,LI Junchao. Crustal Structure of the Hubei Region Based on H-κ-c Method[J]. jgg, 2023, 43(增1): 75-80.
LIU Qian,ZHAO Rui,LI Junchao. Crustal Structure of the Hubei Region Based on H-κ-c Method[J]. jgg, 2023, 43(增1): 75-80.
URL:
http://www.jgg09.com/EN/ OR http://www.jgg09.com/EN/Y2023/V43/I增1/75
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