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Body Waves Retrieved From Noise Cross-Correlation Reveal Lower Mantle Scatterers Beneath the Northwest Pacific Subduction Zone
Zhang, Limeng1,2,3; Li, Juan1,2,3; Wang, Tao4; Yang, Fan1,2,3; Chen, Qi-Fu1,2,3
2020-10-16
Source PublicationGEOPHYSICAL RESEARCH LETTERS
ISSN0094-8276
Volume47Issue:19Pages:10
AbstractSeismological studies have revealed heterogeneities at scales of 10-1,000 km in the lower mantle. For the first time, we demonstrate here that seismic interferometry of ambient noise can be used to detect faint scattered waves. We locate scattering structures at depths of similar to 900-1,000 km from P-to-P scattered wave signals in stacks of vertical cross-correlograms from dense seismic arrays in northeast China. Independently, we show that this scattering structure produces S-to-P converted signals in the recordings of a deep earthquake. We constrain the thickness (H), the contrasts of the shear wave speed (delta Vs), and density (delta rho) of the anomaly using 1-D synthetics. Our modeling of both the reflected and converted signals indicates that H = 10-20 km, delta Vs = -7.2%, and delta rho = 0.6%, which are similar to values reported previously and consistent with the interpretation that the scattering structure is a fragment of the basaltic oceanic crust associated with the subducted Izanagi plate. Plain Language Summary Analysis of surface waves in ambient noise has been widely applied to image the structure of the crust and mantle. However, it is more difficult to extract the signals of body waves in the deep mantle from ambient noise. We explore signals by cross-correlation using ground motion recordings from dense seismic arrays in northeast China. We identify a scattering signal at time similar to 200 s. By analyzing and comparing the results of conversion waves generated by deep earthquakes, we confirm that this scattering signal represents a kind of body wave reflected by a small-scale structure in the mid-mantle at depths of similar to 900-1,000 km. The successful extraction of the weak body waves generated by scatterers in the lower mantle provides a potential method for the global detection of fine-scale heterogeneities in the mantle, which will provide a better understanding of the composition and structure of the mantle, and the geodynamic processes in the deep earth.
Keywordambient noise body wave lower mantel heterogeneity scatterer subduction zone
DOI10.1029/2020GL088846
Funding OrganizationStrategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC
WOS KeywordCRUSTAL STRUCTURE BENEATH ; SEISMIC SCATTERERS ; NE CHINA ; DISCONTINUITY ; SLAB ; TOMOGRAPHY ; RAYLEIGH ; 410KM ; TIMES
Language英语
Funding ProjectStrategic Priority Research Program (B) of Chinese Academy of Sciences[XDB18010302] ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster[2017YFC1500300] ; NSFC[41774065] ; NSFC[41774046] ; NSFC[91958209]
Funding OrganizationStrategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; Strategic Priority Research Program (B) of Chinese Academy of Sciences ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; National Key R&D Program of China on Monitoring, Early Warning and Prevention of Major Natural Disaster ; NSFC ; NSFC ; NSFC ; NSFC
WOS Research AreaGeology
WOS SubjectGeosciences, Multidisciplinary
WOS IDWOS:000584669000048
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/98696
Collection地球与行星物理院重点实验室
Corresponding AuthorLi, Juan
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China
2.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing, Peoples R China
3.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
4.Nanjing Univ, Sch Earth Sci & Engn, Nanjing, Peoples R China
First Author AffilicationKey Laboratory of Earth and Planetary Physics, Chinese Academy of Sciences
Corresponding Author AffilicationKey Laboratory of Earth and Planetary Physics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Zhang, Limeng,Li, Juan,Wang, Tao,et al. Body Waves Retrieved From Noise Cross-Correlation Reveal Lower Mantle Scatterers Beneath the Northwest Pacific Subduction Zone[J]. GEOPHYSICAL RESEARCH LETTERS,2020,47(19):10.
APA Zhang, Limeng,Li, Juan,Wang, Tao,Yang, Fan,&Chen, Qi-Fu.(2020).Body Waves Retrieved From Noise Cross-Correlation Reveal Lower Mantle Scatterers Beneath the Northwest Pacific Subduction Zone.GEOPHYSICAL RESEARCH LETTERS,47(19),10.
MLA Zhang, Limeng,et al."Body Waves Retrieved From Noise Cross-Correlation Reveal Lower Mantle Scatterers Beneath the Northwest Pacific Subduction Zone".GEOPHYSICAL RESEARCH LETTERS 47.19(2020):10.
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