Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.9/2756 |
Resumo: | The Cambrian Tamdroust and Bab n’Ali Volcanic Complexes represent two magmatic episodes developed in the latest Ediacaran–Cambrian Atlas Rift of Morocco. Their rifting pulses were accompanied by accumulation of volcanosedimentary edifices (dominated by effusive lava flows in the former and explosive acidic aprons in the latter) associated with active tilting and uplift. Sealing of their peneplaned horst-and-graben palaeotopographies led to the onset of distinct onlapping geometries and angular discordances capping eroded basements ranging from the Ediacaran Ouarzazate Supergroup to the Cambrian Asrir Formation. Previous interpretations of these discordances as pull-apart or compressive events are revised here and reinterpreted in an extensional (rifting) context associated with active volcanism. The record of erosive unconformities, stratigraphic gaps, condensed beds and onlapping patterns across the traditional “lower–middle Cambrian” (or Cambrian Series 2–3) transition of the Atlas Rift must be taken into consideration for global chronostratigraphic correlation based on their trilobite content. |
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Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, MoroccoVulcanismoDiscordânciasGondwanaCâmbrico inferiorCâmbrico médioAtlas (cordilheira)MarrocosThe Cambrian Tamdroust and Bab n’Ali Volcanic Complexes represent two magmatic episodes developed in the latest Ediacaran–Cambrian Atlas Rift of Morocco. Their rifting pulses were accompanied by accumulation of volcanosedimentary edifices (dominated by effusive lava flows in the former and explosive acidic aprons in the latter) associated with active tilting and uplift. Sealing of their peneplaned horst-and-graben palaeotopographies led to the onset of distinct onlapping geometries and angular discordances capping eroded basements ranging from the Ediacaran Ouarzazate Supergroup to the Cambrian Asrir Formation. Previous interpretations of these discordances as pull-apart or compressive events are revised here and reinterpreted in an extensional (rifting) context associated with active volcanism. The record of erosive unconformities, stratigraphic gaps, condensed beds and onlapping patterns across the traditional “lower–middle Cambrian” (or Cambrian Series 2–3) transition of the Atlas Rift must be taken into consideration for global chronostratigraphic correlation based on their trilobite content.Repositório do LNEGÁlvaro, J. JavierEzzouhairi, HassanClausen, SébastienRibeiro, Maria LuísaSolá, A. Rita2015-05-14T15:31:57Z2015-04-01T00:00:00Z2015-04-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.9/2756engÁlvaro, J. Javier... [et al.] - Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco. In: International Journal of Earth Sciences (Geologische Rundschau), Vol. 104, Issue 3 (April 2015), p. 753-7731437-3254http://dx.doi.org/10.1007/s00531-014-1108-4info: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:RCAAP2022-09-06T12:27:57Zoai:repositorio.lneg.pt:10400.9/2756Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T15:35:48.140277Repositório 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 |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
title |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
spellingShingle |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco Álvaro, J. Javier Vulcanismo Discordâncias Gondwana Câmbrico inferior Câmbrico médio Atlas (cordilheira) Marrocos |
title_short |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
title_full |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
title_fullStr |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
title_full_unstemmed |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
title_sort |
Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco |
author |
Álvaro, J. Javier |
author_facet |
Álvaro, J. Javier Ezzouhairi, Hassan Clausen, Sébastien Ribeiro, Maria Luísa Solá, A. Rita |
author_role |
author |
author2 |
Ezzouhairi, Hassan Clausen, Sébastien Ribeiro, Maria Luísa Solá, A. Rita |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Repositório do LNEG |
dc.contributor.author.fl_str_mv |
Álvaro, J. Javier Ezzouhairi, Hassan Clausen, Sébastien Ribeiro, Maria Luísa Solá, A. Rita |
dc.subject.por.fl_str_mv |
Vulcanismo Discordâncias Gondwana Câmbrico inferior Câmbrico médio Atlas (cordilheira) Marrocos |
topic |
Vulcanismo Discordâncias Gondwana Câmbrico inferior Câmbrico médio Atlas (cordilheira) Marrocos |
description |
The Cambrian Tamdroust and Bab n’Ali Volcanic Complexes represent two magmatic episodes developed in the latest Ediacaran–Cambrian Atlas Rift of Morocco. Their rifting pulses were accompanied by accumulation of volcanosedimentary edifices (dominated by effusive lava flows in the former and explosive acidic aprons in the latter) associated with active tilting and uplift. Sealing of their peneplaned horst-and-graben palaeotopographies led to the onset of distinct onlapping geometries and angular discordances capping eroded basements ranging from the Ediacaran Ouarzazate Supergroup to the Cambrian Asrir Formation. Previous interpretations of these discordances as pull-apart or compressive events are revised here and reinterpreted in an extensional (rifting) context associated with active volcanism. The record of erosive unconformities, stratigraphic gaps, condensed beds and onlapping patterns across the traditional “lower–middle Cambrian” (or Cambrian Series 2–3) transition of the Atlas Rift must be taken into consideration for global chronostratigraphic correlation based on their trilobite content. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-05-14T15:31:57Z 2015-04-01T00:00:00Z 2015-04-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.9/2756 |
url |
http://hdl.handle.net/10400.9/2756 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Álvaro, J. Javier... [et al.] - Syn-rift unconformities punctuating the lower-middle Cambrian transition in the Atlas Rift, Morocco. In: International Journal of Earth Sciences (Geologische Rundschau), Vol. 104, Issue 3 (April 2015), p. 753-773 1437-3254 http://dx.doi.org/10.1007/s00531-014-1108-4 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.source.none.fl_str_mv |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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1799130224138387456 |