The Ediacaran Salinas turbidites, Araçuaí Orogen, MG: tectonics and sedimentation interplay in a syn-orogenic basin
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
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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Brazilian Journal of Geology |
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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 |
_version_ |
1752122398914641920 |