Inherited arc signature in Ediacaran and Early Cambrian basins of

Detalhes bibliográficos
Autor(a) principal: Pereira, M. Francisco
Data de Publicação: 2006
Outros Autores: Chichorro, Martim, Linnemann, Ulf, Eguiluz, Luis, Silva, Jose B.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10174/2974
Resumo: Geochemical data from clastic rocks of the Ossa-Morena Zone (Iberian Massif) show that the main source for the Ediacaran and the Early Cambrian sediments was a recycled Cadomian magmatic arc along the northern Gondwana margin. The geodynamic scenario for this segment of the Avalonian-Cadomian active margin is considered in terms of three main stages: (1) The 570–540 Ma evolution of an active continental margin evolving oblique collision with accretion of oceanic crust, a continental magmatic arc and the development of related marginal basins; (2) the Ediacaran–Early Cambrian transition (540–520 Ma) coeval with important orogenic magmatism and the formation of transtensional basins with detritus derived from remnants of the magmatic arc; and (3) Gondwana fragmentation with the formation of Early Cambrian (520–510 Ma) shallow-water platforms in transtensional grabens accompanied by rift-related magmatism. These processes are comparable to similar Cadomian successions in other regions of Gondwanan Europe and Northwest Africa. Ediacaran and Early Cambrian basins preserved in the Ossa-Morena Zone (Portugal and Spain), the North Armorican Cadomian Belt (France), the Saxo-Thuringian Zone (Germany), the Western Meseta and the Western High-Atlas (Morocco) share a similar geotectonic evolution, probably situated in the same paleogeographic West African peri-Gondwanan region of the Avalonian-Cadomian active margin.
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spelling Inherited arc signature in Ediacaran and Early Cambrian basins ofGeochemistry of sedimentsEdiacaranEarly CambrianNorthern Gondwana marginCadomian orogenyOssa-Morena zoneGeochemical data from clastic rocks of the Ossa-Morena Zone (Iberian Massif) show that the main source for the Ediacaran and the Early Cambrian sediments was a recycled Cadomian magmatic arc along the northern Gondwana margin. The geodynamic scenario for this segment of the Avalonian-Cadomian active margin is considered in terms of three main stages: (1) The 570–540 Ma evolution of an active continental margin evolving oblique collision with accretion of oceanic crust, a continental magmatic arc and the development of related marginal basins; (2) the Ediacaran–Early Cambrian transition (540–520 Ma) coeval with important orogenic magmatism and the formation of transtensional basins with detritus derived from remnants of the magmatic arc; and (3) Gondwana fragmentation with the formation of Early Cambrian (520–510 Ma) shallow-water platforms in transtensional grabens accompanied by rift-related magmatism. These processes are comparable to similar Cadomian successions in other regions of Gondwanan Europe and Northwest Africa. Ediacaran and Early Cambrian basins preserved in the Ossa-Morena Zone (Portugal and Spain), the North Armorican Cadomian Belt (France), the Saxo-Thuringian Zone (Germany), the Western Meseta and the Western High-Atlas (Morocco) share a similar geotectonic evolution, probably situated in the same paleogeographic West African peri-Gondwanan region of the Avalonian-Cadomian active margin.2011-12-21T18:25:39Z2011-12-212006-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10174/2974http://hdl.handle.net/10174/2974eng297-315144Precambrian Researchmpereira@uevora.ptndndndnd250Pereira, M. FranciscoChichorro, MartimLinnemann, UlfEguiluz, LuisSilva, Jose B.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-01-03T18:39:43Zoai:dspace.uevora.pt:10174/2974Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T00:58:30.415495Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Inherited arc signature in Ediacaran and Early Cambrian basins of
title Inherited arc signature in Ediacaran and Early Cambrian basins of
spellingShingle Inherited arc signature in Ediacaran and Early Cambrian basins of
Pereira, M. Francisco
Geochemistry of sediments
Ediacaran
Early Cambrian
Northern Gondwana margin
Cadomian orogeny
Ossa-Morena zone
title_short Inherited arc signature in Ediacaran and Early Cambrian basins of
title_full Inherited arc signature in Ediacaran and Early Cambrian basins of
title_fullStr Inherited arc signature in Ediacaran and Early Cambrian basins of
title_full_unstemmed Inherited arc signature in Ediacaran and Early Cambrian basins of
title_sort Inherited arc signature in Ediacaran and Early Cambrian basins of
author Pereira, M. Francisco
author_facet Pereira, M. Francisco
Chichorro, Martim
Linnemann, Ulf
Eguiluz, Luis
Silva, Jose B.
author_role author
author2 Chichorro, Martim
Linnemann, Ulf
Eguiluz, Luis
Silva, Jose B.
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Pereira, M. Francisco
Chichorro, Martim
Linnemann, Ulf
Eguiluz, Luis
Silva, Jose B.
dc.subject.por.fl_str_mv Geochemistry of sediments
Ediacaran
Early Cambrian
Northern Gondwana margin
Cadomian orogeny
Ossa-Morena zone
topic Geochemistry of sediments
Ediacaran
Early Cambrian
Northern Gondwana margin
Cadomian orogeny
Ossa-Morena zone
description Geochemical data from clastic rocks of the Ossa-Morena Zone (Iberian Massif) show that the main source for the Ediacaran and the Early Cambrian sediments was a recycled Cadomian magmatic arc along the northern Gondwana margin. The geodynamic scenario for this segment of the Avalonian-Cadomian active margin is considered in terms of three main stages: (1) The 570–540 Ma evolution of an active continental margin evolving oblique collision with accretion of oceanic crust, a continental magmatic arc and the development of related marginal basins; (2) the Ediacaran–Early Cambrian transition (540–520 Ma) coeval with important orogenic magmatism and the formation of transtensional basins with detritus derived from remnants of the magmatic arc; and (3) Gondwana fragmentation with the formation of Early Cambrian (520–510 Ma) shallow-water platforms in transtensional grabens accompanied by rift-related magmatism. These processes are comparable to similar Cadomian successions in other regions of Gondwanan Europe and Northwest Africa. Ediacaran and Early Cambrian basins preserved in the Ossa-Morena Zone (Portugal and Spain), the North Armorican Cadomian Belt (France), the Saxo-Thuringian Zone (Germany), the Western Meseta and the Western High-Atlas (Morocco) share a similar geotectonic evolution, probably situated in the same paleogeographic West African peri-Gondwanan region of the Avalonian-Cadomian active margin.
publishDate 2006
dc.date.none.fl_str_mv 2006-01-01T00:00:00Z
2011-12-21T18:25:39Z
2011-12-21
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10174/2974
http://hdl.handle.net/10174/2974
url http://hdl.handle.net/10174/2974
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 297-315
144
Precambrian Research
mpereira@uevora.pt
nd
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