Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform

The crust of the South American platform recorded imprints of dynamic processes related with the opening of the Central and South Atlantic but has not been well measured. Crustal structure can be retrieved from teleseismic receiver functions using H–κ stacking, but nearly parallel stripes of high st...

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Detalles Bibliográficos
Autores: Meijian, An, Feng, Mei, Assumpçao, Marcelo S, Bianchi, Marcelo B, França, George S, Rocha, Marcelo P, Sánchez Bettucci, Leda
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2024
País:Uruguay
Institución:Universidad de la República
Repositorio:COLIBRI
Idioma:inglés
OAI Identifier:oai:colibri.udelar.edu.uy:20.500.12008/51079
Acceso en línea:https://hdl.handle.net/20.500.12008/51079
Access Level:acceso abierto
Palabra clave:Seismic discontinuities
Crustal structure
Large igneous provinces
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dc.title.none.fl_str_mv Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
title Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
spellingShingle Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
Meijian, An
Seismic discontinuities
Crustal structure
Large igneous provinces
title_short Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
title_full Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
title_fullStr Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
title_full_unstemmed Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
title_sort Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform
dc.creator.none.fl_str_mv Meijian, An
Feng, Mei
Assumpçao, Marcelo S
Bianchi, Marcelo B
França, George S
Rocha, Marcelo P
Sánchez Bettucci, Leda
author Meijian, An
author_facet Meijian, An
Feng, Mei
Assumpçao, Marcelo S
Bianchi, Marcelo B
França, George S
Rocha, Marcelo P
Sánchez Bettucci, Leda
author_role author
author2 Feng, Mei
Assumpçao, Marcelo S
Bianchi, Marcelo B
França, George S
Rocha, Marcelo P
Sánchez Bettucci, Leda
author2_role author
author
author
author
author
author
dc.contributor.filiacion.none.fl_str_mv Meijian An
Feng Mei
Assumpçao Marcelo S
Bianchi Marcelo B
França George S
Rocha Marcelo P
Sánchez Bettucci Leda, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas.
dc.subject.es.fl_str_mv Seismic discontinuities
Crustal structure
Large igneous provinces
topic Seismic discontinuities
Crustal structure
Large igneous provinces
description The crust of the South American platform recorded imprints of dynamic processes related with the opening of the Central and South Atlantic but has not been well measured. Crustal structure can be retrieved from teleseismic receiver functions using H–κ stacking, but nearly parallel stripes of high stacking values existing in stacking images for seismic stations in sedimentary area cause difficulties in identifying solutions. We show that some seemingly spurious stripes that do not point to any layer solution are helpful in the identification of the solution position. With the aid of the auxiliary stripes, we retrieved thicknesses and Vp/Vs of sedimentary and crystalline crust for 65 permanent stations of the Brazilian Seismographic Network and six new portable seismic stations in Brazil and Uruguay. The resulted sedimentary thickness and Vp/Vs exhibit a good correlation with the Phanerozoic sediments in the South American basins. The crust of Parana–Etendeka ´ Large Igneous Province (LIP) had been expected to be more mafic since it had ever been penetrated by mantle magma in the Cretaceous related to the south Atlantic opening. However, we found very low Vp/Vs (1.67) in the crystalline crust beneath the LIP, implying a more felsic crust and that no significant mafic intruding/underplating has occurred in the region. The more felsic crust may be formed in a special evolution early than the magmatic event, or during the magmatic event by releasing crustal volatiles. The resulted sedimentary thickness and Vp/Vs ratios exhibit a good correlation with the Phanerozoic sediments in the South American basins, which implies that Triassic–Jurassic and Cretaceous magmatism did not cause significant metamorphism in sediments formed before the magmatic events.
publishDate 2024
dc.date.issued.none.fl_str_mv 2024
dc.date.accessioned.none.fl_str_mv 2025-08-18T15:56:00Z
dc.date.available.none.fl_str_mv 2025-08-18T15:56:00Z
dc.type.es.fl_str_mv Artículo
dc.type.none.fl_str_mv info:eu-repo/semantics/article
dc.type.version.none.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.citation.es.fl_str_mv Meijian, A, Feng, M, Assumpçao, M [y otros autores]. "Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform". Geophysical Journal International. [en línea] 2024, 239(1): 258-275. 18 h. DOI: 10.1093/gji/ggae260
dc.identifier.issn.none.fl_str_mv 1365-246X
dc.identifier.uri.none.fl_str_mv https://hdl.handle.net/20.500.12008/51079
dc.identifier.doi.none.fl_str_mv 10.1093/gji/ggae260
identifier_str_mv Meijian, A, Feng, M, Assumpçao, M [y otros autores]. "Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform". Geophysical Journal International. [en línea] 2024, 239(1): 258-275. 18 h. DOI: 10.1093/gji/ggae260
1365-246X
10.1093/gji/ggae260
url https://hdl.handle.net/20.500.12008/51079
dc.language.iso.none.fl_str_mv en
eng
language_invalid_str_mv en
language eng
dc.relation.none.fl_str_mv Geophysical Journal International, 2024, 239(1): 258-275.
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
dc.rights.license.none.fl_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv Licencia Creative Commons Atribución (CC - By 4.0)
dc.format.extent.es.fl_str_mv 18 h
dc.format.mimetype.es.fl_str_mv application/pdf
dc.coverage.spatial.es.fl_str_mv South America
dc.publisher.es.fl_str_mv Oxford
dc.source.none.fl_str_mv reponame:COLIBRI
instname:Universidad de la República
instacron:Universidad de la República
instname_str Universidad de la República
instacron_str Universidad de la República
institution Universidad de la República
reponame_str COLIBRI
collection COLIBRI
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spelling Meijian AnFeng MeiAssumpçao Marcelo SBianchi Marcelo BFrança George SRocha Marcelo PSánchez Bettucci Leda, Universidad de la República (Uruguay). Facultad de Ciencias. Instituto de Ciencias Geológicas.South America2025-08-18T15:56:00Z2025-08-18T15:56:00Z2024Meijian, A, Feng, M, Assumpçao, M [y otros autores]. "Influence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platform". Geophysical Journal International. [en línea] 2024, 239(1): 258-275. 18 h. DOI: 10.1093/gji/ggae2601365-246Xhttps://hdl.handle.net/20.500.12008/5107910.1093/gji/ggae260The crust of the South American platform recorded imprints of dynamic processes related with the opening of the Central and South Atlantic but has not been well measured. Crustal structure can be retrieved from teleseismic receiver functions using H–κ stacking, but nearly parallel stripes of high stacking values existing in stacking images for seismic stations in sedimentary area cause difficulties in identifying solutions. We show that some seemingly spurious stripes that do not point to any layer solution are helpful in the identification of the solution position. With the aid of the auxiliary stripes, we retrieved thicknesses and Vp/Vs of sedimentary and crystalline crust for 65 permanent stations of the Brazilian Seismographic Network and six new portable seismic stations in Brazil and Uruguay. The resulted sedimentary thickness and Vp/Vs exhibit a good correlation with the Phanerozoic sediments in the South American basins. The crust of Parana–Etendeka ´ Large Igneous Province (LIP) had been expected to be more mafic since it had ever been penetrated by mantle magma in the Cretaceous related to the south Atlantic opening. However, we found very low Vp/Vs (1.67) in the crystalline crust beneath the LIP, implying a more felsic crust and that no significant mafic intruding/underplating has occurred in the region. The more felsic crust may be formed in a special evolution early than the magmatic event, or during the magmatic event by releasing crustal volatiles. The resulted sedimentary thickness and Vp/Vs ratios exhibit a good correlation with the Phanerozoic sediments in the South American basins, which implies that Triassic–Jurassic and Cretaceous magmatism did not cause significant metamorphism in sediments formed before the magmatic events.Submitted by Pintos Natalia (nataliapintosmvd@gmail.com) on 2025-08-15T11:44:34Z No. of bitstreams: 2 license_rdf: 24942 bytes, checksum: 58cb336ce230a47d2f88ad02838a665f (MD5) 101093gjiggae260.pdf: 6822489 bytes, checksum: eb5c0bc86382779ad1b59240caa7e933 (MD5)Approved for entry into archive by Faget Cecilia (lfaget@fcien.edu.uy) on 2025-08-18T14:14:13Z (GMT) No. of bitstreams: 2 license_rdf: 24942 bytes, checksum: 58cb336ce230a47d2f88ad02838a665f (MD5) 101093gjiggae260.pdf: 6822489 bytes, checksum: eb5c0bc86382779ad1b59240caa7e933 (MD5)Made available in DSpace by Luna Fabiana (fabiana.luna@seciu.edu.uy) on 2025-08-18T15:56:00Z (GMT). No. of bitstreams: 2 license_rdf: 24942 bytes, checksum: 58cb336ce230a47d2f88ad02838a665f (MD5) 101093gjiggae260.pdf: 6822489 bytes, checksum: eb5c0bc86382779ad1b59240caa7e933 (MD5) Previous issue date: 202418 happlication/pdfenengOxfordGeophysical Journal International, 2024, 239(1): 258-275.Las obras depositadas en el Repositorio se rigen por la Ordenanza de los Derechos de la Propiedad Intelectual de la Universidad de la República.(Res. Nº 91 de C.D.C. de 8/III/1994 – D.O. 7/IV/1994) y por la Ordenanza del Repositorio Abierto de la Universidad de la República (Res. Nº 16 de C.D.C. de 07/10/2014)info:eu-repo/semantics/openAccessLicencia Creative Commons Atribución (CC - By 4.0)Seismic discontinuitiesCrustal structureLarge igneous provincesInfluence of upwelling mantle magmas on cratonic crust implied from Vp/Vs beneath South America platformArtículoinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionreponame:COLIBRIinstname:Universidad de la Repúblicainstacron:Universidad de la RepúblicaMeijian, AnFeng, MeiAssumpçao, Marcelo SBianchi, Marcelo BFrança, George SRocha, Marcelo PSánchez Bettucci, LedaLICENSElicense.txtlicense.txttext/plain; charset=utf-84267http://localhost:8080/xmlui/bitstream/20.500.12008/51079/5/license.txt6429389a7df7277b72b7924fdc7d47a9MD55CC-LICENSElicense_urllicense_urltext/plain; charset=utf-844http://localhost:8080/xmlui/bitstream/20.500.12008/51079/2/license_urla0ebbeafb9d2ec7cbb19d7137ebc392cMD52license_textlicense_texttext/html; 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públicahttps://udelar.edu.uy/https://www.colibri.udelar.edu.uy/oai/requestkarina.camps@seciu.edu.uyUruguayopendoar:47712025-08-18T15:56COLIBRI - Universidad de la Repúblicafalse
score 14,713841

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