Characterizing the shallow structure with the multimodal dispersion curves and the body wave refraction traveltimes from deep seismic sounding data

Guo, Wenbin1,2; Li, Zhengbo3,4; Zhao, Shuai5; Chen, Xiaofei3,4

2023-01-09

10.3389/feart.2022.1025935

FRONTIERS IN EARTH SCIENCE   Impact Factor & Quartile

2296-6463

Deep seismic sounding (DSS) profiles are one of the most powerful tools for detecting crustal structures, and they have been deployed worldwide. Generally, the analysis of DSS data mainly focuses on body waves, while the surface waves are considered noise. We suggest that the surface waves in DSS data can be used to constrain subsurface structures. In this study, we use a DSS profile in the Piedmont and Atlantic Coastal Plain as an example to present the usage of the DSS surface wave. Multimodal dispersion curves were extracted from the DSS data with the Frequency-Bessel transform method, and were used in Monte Carlo joint inversions with body wave refraction traveltimes to constrain the shallow structures. Through the inversion, a horizontal stratum on the surface was identified in the Piedmont, and a two-layer sedimentary structure was identified in the Atlantic Coastal Plain. Comparisons with existing studies verified the accuracy of the shallow structures obtained in this study, demonstrating that the shallow velocity structure could be well constrained with the additional constraints provided by the multimodal dispersion curves. Thus, we believe that further research on the surface waves recorded in DSS surveys is warranted.

deep seismic sounding data frequency-bessel transform method multimodal dispersion curves refraction joint inversion

SCI

English

Corresponding

National Natural Science Foundation of China["41790465","U1901602","42074070","42104048"] ; Shenzhen Key Laboratory of Deep Offshore Oil and Gas Exploration Technology[ZDSYS20190902093007855] ; National Key R and D Program of China[2017YFC1500204] ; China Postdoctoral Science Foundation[2021M691406] ; China Earthquake Science Experiment Project[202107086728]

Geology

Geosciences, Multidisciplinary

WOS:000921265000001

FRONTIERS MEDIA SA

Web of Science

1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei, Peoples R China
2.China Earthquake Adm, Geophys Explorat Ctr, Zhengzhou, Peoples R China
3.Southern Univ Sci & Technol, Shenzhen Key Lab Deep Offshore Oil & Gas Explorat, Shenzhen, Peoples R China
4.Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen, Peoples R China
5.Beijing Earthquake Adm, Beijing, Peoples R China

Guo, Wenbin,Li, Zhengbo,Zhao, Shuai,et al. Characterizing the shallow structure with the multimodal dispersion curves and the body wave refraction traveltimes from deep seismic sounding data[J]. FRONTIERS IN EARTH SCIENCE,2023,10.

Guo, Wenbin,Li, Zhengbo,Zhao, Shuai,&Chen, Xiaofei.(2023).Characterizing the shallow structure with the multimodal dispersion curves and the body wave refraction traveltimes from deep seismic sounding data.FRONTIERS IN EARTH SCIENCE,10.

Guo, Wenbin,et al."Characterizing the shallow structure with the multimodal dispersion curves and the body wave refraction traveltimes from deep seismic sounding data".FRONTIERS IN EARTH SCIENCE 10(2023).