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Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion
Wang, Tuo1,2; Gao, Stephen S.2; Yang, Qiuyue2; Chen, Ling1; Liu, Kelly H.2
2022-05-01
Source PublicationSEISMOLOGICAL RESEARCH LETTERS
ISSN0895-0695
Volume93Issue:3Pages:1753-1767
AbstractLithospheric structure beneath the Archean Tanzania craton and adjacent regions, including segments of the East African rift system (EARS) and the Proterozoic-early Paleozoic orogenic belts between the EARS and the craton, is imaged by a joint inversion of receiver functions and Rayleigh wave dispersion measurements derived from ambient seismic noise for shorter periods and teleseismic data for longer periods. Our resulting crustal thickness, crustal V-p/V-s measurements and 3D shear-wave velocity model for the upper 120 km show a clear spatial correspondence with major surficial geological features. The new results suggest the presence of a mafic layer in the bottom of the crust of the entire Archean craton, which is previously only identified beneath the southern portion of the craton. High crustal V-p/V-s values measured in the Rungwe Volcanic Province and most areas of the Kenya and Tanganyika rift segments can be attributed to a combined result of basaltic sediments atop the crust, magmatic intrusion, and crustal partial melting. The Kivu Volcanic Province and parts of the Kenya rift segment are characterized by localized lower-than-normal crustal V-p/V-s values and shear velocities in the lower crust and uppermost mantle, which, given the presence of large volume of CO2 from surficial observations, can be best interpreted by CO2-filled fractures or conduits. Lower-than-normal shear velocities in the uppermost mantle are revealed beneath almost the entire study region with the lowest values found in all the three volcanic provinces. The low velocities are indicative of an underplated layer formed by mantle-derived magmatic materials trapped below the Moho. The relatively low velocities beneath the volcanic provinces might be caused by a higher degree of partial melting in the uppermost mantle.
DOI10.1785/0220210296
Funding OrganizationSeismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society
WOS KeywordLUANGWA RIFT ZONES ; CRUSTAL STRUCTURE ; EASTERN AFRICA ; WESTERN BRANCH ; AMBIENT-NOISE ; STRUCTURE BENEATH ; MANTLE STRUCTURE ; TOMOGRAPHY ; SOUTHERN ; MALAWI
Language英语
Funding ProjectSeismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF)[EAR-1851048] ; U.S. NSF[1009946] ; U.S. NSF[1919789] ; American Chemical Society[PRF-60281-ND8]
Funding OrganizationSeismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; Seismological Facilities for the Advancement of Geoscience (SAGE) Award of the National Science Foundation (NSF) ; U.S. NSF ; U.S. NSF ; U.S. NSF ; U.S. NSF ; American Chemical Society ; American Chemical Society ; American Chemical Society ; American Chemical Society
WOS Research AreaGeochemistry & Geophysics
WOS SubjectGeochemistry & Geophysics
WOS IDWOS:000792402100001
PublisherSEISMOLOGICAL SOC AMER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105913
Collection岩石圈演化国家重点实验室
Corresponding AuthorLiu, Kelly H.
Affiliation1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
2.Missouri Univ Sci & Technol, Geol & Geophys Program, Rolla, MO 65409 USA
First Author AffilicationInstitute of Geology and Geophysics, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wang, Tuo,Gao, Stephen S.,Yang, Qiuyue,et al. Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion[J]. SEISMOLOGICAL RESEARCH LETTERS,2022,93(3):1753-1767.
APA Wang, Tuo,Gao, Stephen S.,Yang, Qiuyue,Chen, Ling,&Liu, Kelly H..(2022).Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion.SEISMOLOGICAL RESEARCH LETTERS,93(3),1753-1767.
MLA Wang, Tuo,et al."Lithospheric Structure underneath the Archean Tanzania Craton and Adjacent Regions from a Joint Inversion of Receiver Functions and Rayleigh-Wave Phase Velocity Dispersion".SEISMOLOGICAL RESEARCH LETTERS 93.3(2022):1753-1767.
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