气候变化领域集成服务门户(CCPortal): Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane

CCPortal

DOI	10.1016/j.tecto.2021.228761
	Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane
	Zhang P.; Gao R.; Han L.; Lu Z.
发表日期	2021
ISSN	00401951
卷号	803
英文摘要	The deep reflection seismic method is an effective technique for detecting the fine structures of the lithosphere and solving deep geological problems. At present, the methods for obtaining the underground velocity from land deep reflection seismic profile mainly rely on the travel-time information based velocity analysis and tomography, which theoretically limit the resolution of the imaging results. To achieve the goal of using deep reflection seismic profile for crustal-scale high-precision velocity imaging, we must finally overcome the problem of full waveform inversion (FWI) using full wavefield data. In this paper, we successfully conduct FWI using the early-arrival wavefields (mainly primary and multiple refraction wavefields) in the deep reflection seismic profile, which can be seen as the first important step towards the goal of crustal-scale high-precision velocity imaging. We propose a robust refraction waves FWI workflow with global normalized cross-correlation, multiple refraction matching, reverse time source estimation and wavenumber domain gradient filtering as its core algorithm. The application of the proposed FWI method to the refraction waves of the deep reflection seismic profiles in the central part of Lhasa Terrane shows that the refraction FWI images have a higher resolution to underground structures both in horizontal and vertical directions than the first-arrival tomography images. The lateral velocity change can be well-matched with the typical geological characteristics of the work area. The FWI result can better describe the lateral boundaries of the strata in different eras. At a depth of less than 3 km from the surface, the refraction FWI can correct the interface morphology of the tomography results and recover some small-scale velocity structures and high-velocity anomalies. © 2021 Elsevier B.V.
关键词	Deep reflection seismic profile Full waveform inversion Lhasa Terrane Multiples Refraction wave
英文关键词	Geology; Morphology; Seismic waves; Seismology; Tomography; Underground structures; Velocity; Waveform analysis; Full-waveform inversion; Geological characteristics; Interface morphologies; Lateral velocities; Normalized cross correlation; Small-scale velocity; Travel time information; Vertical direction; Refraction; data inversion; seismic reflection; seismic refraction; seismic wave; terrane; wave field; waveform analysis; China; Lhasa Terrane; Xizang
语种	英语
来源期刊	Tectonophysics
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/208113
作者单位	College of Geo-exploration Science and Technology, Jilin University, Changchun, Jilin, 130026, China; School of Earth Science and Geological Engineering, Sun Yat-sen University, Guangzhou, Guangdong 510275, China; Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China; Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resources, Institute of Geology, Chinese Academy of Geological Sciences, Beijing, 100037, China
推荐引用方式 GB/T 7714	Zhang P.,Gao R.,Han L.,et al. Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane[J],2021,803.
APA	Zhang P.,Gao R.,Han L.,&Lu Z..(2021).Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane.Tectonophysics,803.
MLA	Zhang P.,et al."Refraction waves full waveform inversion of deep reflection seismic profiles in the central part of Lhasa Terrane".Tectonophysics 803(2021).