The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin

Detalhes bibliográficos
Autor(a) principal: Costa,Felipe Garcia Domingues da
Data de Publicação: 2018
Outros Autores: Alkmim,Fernando Flecha de, Magalhães,Pierre Muzzi
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Brazilian Journal of Geology
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018000400783
Resumo: ABSTRACT: The Ediacaran Salinas Formation exposed in the northern Araçuaí orogen is made up of syn-orogenic turbidites deposited between 580 and 560 Ma. Aiming to investigate how tectonic and sedimentary processes interact during the development of a flysch basin, we carried out a detailed field-based sedimentological and stratigraphic investigation of the Salinas Formation in its type-area located in northern Minas Gerais. Lithofacies and lithofacies assemblages recognized in the unit represent proximal to distal turbidite fan deposits, all of them affected by soft-sediment deformation. Based on the amount of lateral displacement and sediment volume involved, we distinguished four classes of soft-sediment deformation structures. The vertical facies changes of the whole Salinas Formation characterizes a coarsening-upward 1st-order sequence that record a general southwest-south progradation of a turbidite fan system fed from the north. The overall organization of the 25-60 m-thick fining-up cycles are especially elucidative of the interplay between tectonic and sedimentary processes during the accumulation of the Salinas turbidites. They initiate with thick sandstone beds deposited on top of intensively deformed strata, continuing with various sandy turbidite pulses, and ending with fine-grained sediments. In our view, they record the retraction and reorganization of the basin fill system after a sequence of seismic events.
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spelling The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basinSyn-sedimentary deformationAraçuaí orogenSalinas Formationturbiditetectonic and sedimentationABSTRACT: The Ediacaran Salinas Formation exposed in the northern Araçuaí orogen is made up of syn-orogenic turbidites deposited between 580 and 560 Ma. Aiming to investigate how tectonic and sedimentary processes interact during the development of a flysch basin, we carried out a detailed field-based sedimentological and stratigraphic investigation of the Salinas Formation in its type-area located in northern Minas Gerais. Lithofacies and lithofacies assemblages recognized in the unit represent proximal to distal turbidite fan deposits, all of them affected by soft-sediment deformation. Based on the amount of lateral displacement and sediment volume involved, we distinguished four classes of soft-sediment deformation structures. The vertical facies changes of the whole Salinas Formation characterizes a coarsening-upward 1st-order sequence that record a general southwest-south progradation of a turbidite fan system fed from the north. The overall organization of the 25-60 m-thick fining-up cycles are especially elucidative of the interplay between tectonic and sedimentary processes during the accumulation of the Salinas turbidites. They initiate with thick sandstone beds deposited on top of intensively deformed strata, continuing with various sandy turbidite pulses, and ending with fine-grained sediments. In our view, they record the retraction and reorganization of the basin fill system after a sequence of seismic events.Sociedade Brasileira de Geologia2018-12-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018000400783Brazilian Journal of Geology v.48 n.4 2018reponame:Brazilian Journal of Geologyinstname:Sociedade Brasileira de Geologia (SBGEO)instacron:SBGEO10.1590/2317-4889201820180020info:eu-repo/semantics/openAccessCosta,Felipe Garcia Domingues daAlkmim,Fernando Flecha deMagalhães,Pierre Muzzieng2019-01-08T00:00:00Zoai:scielo:S2317-48892018000400783Revistahttp://bjg.siteoficial.ws/index.htmhttps://old.scielo.br/oai/scielo-oai.phpsbgsede@sbgeo.org.br||claudio.riccomini@gmail.com2317-46922317-4692opendoar:2019-01-08T00:00Brazilian Journal of Geology - Sociedade Brasileira de Geologia (SBGEO)false
dc.title.none.fl_str_mv The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
title The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
spellingShingle The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
Costa,Felipe Garcia Domingues da
Syn-sedimentary deformation
Araçuaí orogen
Salinas Formation
turbidite
tectonic and sedimentation
title_short The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
title_full The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
title_fullStr The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
title_full_unstemmed The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
title_sort The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
author Costa,Felipe Garcia Domingues da
author_facet Costa,Felipe Garcia Domingues da
Alkmim,Fernando Flecha de
Magalhães,Pierre Muzzi
author_role author
author2 Alkmim,Fernando Flecha de
Magalhães,Pierre Muzzi
author2_role author
author
dc.contributor.author.fl_str_mv Costa,Felipe Garcia Domingues da
Alkmim,Fernando Flecha de
Magalhães,Pierre Muzzi
dc.subject.por.fl_str_mv Syn-sedimentary deformation
Araçuaí orogen
Salinas Formation
turbidite
tectonic and sedimentation
topic Syn-sedimentary deformation
Araçuaí orogen
Salinas Formation
turbidite
tectonic and sedimentation
description ABSTRACT: The Ediacaran Salinas Formation exposed in the northern Araçuaí orogen is made up of syn-orogenic turbidites deposited between 580 and 560 Ma. Aiming to investigate how tectonic and sedimentary processes interact during the development of a flysch basin, we carried out a detailed field-based sedimentological and stratigraphic investigation of the Salinas Formation in its type-area located in northern Minas Gerais. Lithofacies and lithofacies assemblages recognized in the unit represent proximal to distal turbidite fan deposits, all of them affected by soft-sediment deformation. Based on the amount of lateral displacement and sediment volume involved, we distinguished four classes of soft-sediment deformation structures. The vertical facies changes of the whole Salinas Formation characterizes a coarsening-upward 1st-order sequence that record a general southwest-south progradation of a turbidite fan system fed from the north. The overall organization of the 25-60 m-thick fining-up cycles are especially elucidative of the interplay between tectonic and sedimentary processes during the accumulation of the Salinas turbidites. They initiate with thick sandstone beds deposited on top of intensively deformed strata, continuing with various sandy turbidite pulses, and ending with fine-grained sediments. In our view, they record the retraction and reorganization of the basin fill system after a sequence of seismic events.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018000400783
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892018000400783
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/2317-4889201820180020
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Geologia
publisher.none.fl_str_mv Sociedade Brasileira de Geologia
dc.source.none.fl_str_mv Brazilian Journal of Geology v.48 n.4 2018
reponame:Brazilian Journal of Geology
instname:Sociedade Brasileira de Geologia (SBGEO)
instacron:SBGEO
instname_str Sociedade Brasileira de Geologia (SBGEO)
instacron_str SBGEO
institution SBGEO
reponame_str Brazilian Journal of Geology
collection Brazilian Journal of Geology
repository.name.fl_str_mv Brazilian Journal of Geology - Sociedade Brasileira de Geologia (SBGEO)
repository.mail.fl_str_mv sbgsede@sbgeo.org.br||claudio.riccomini@gmail.com
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