Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)

Detalhes bibliográficos
Autor(a) principal: Perinotto, José Alexandre de Jesus [UNESP]
Data de Publicação: 2006
Outros Autores: Etchebehere, Mario Lincoln de Carlos, Zaine, José Eduardo [UNESP], Saad, Antonio Roberto [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/451
http://hdl.handle.net/11449/69322
Resumo: The Rio Claro Formation mainly occurs in the county of Rio Claro (SP) lying unconformably on Paleozoic and Mesozoic rocks. Its thickness is 30-40 m. It shows fine to coarse, regular to poor sorted, Triable sandstones and conglomerates with quartzite and quartz clasts in the base. Thin layers of mudstone occur interbeded. Stratigraphic maps had been elaborated in recent analyses allowing to improve the knowledge about the formation. The biggest thicknesses occur on the east part of the studied area. The coarse/fine clastic ratio map demonstrates that fine sediments are concentrated in the east side, and suggests the existence of barriers which conditioned perennial water body (or bodies) where decantation took place (east, south and southeast sides). The structural contour map of the Rio Claro Formation base indicates a NW/SE trough which was the main depositional axis. The integrated analysis demonstrates that the formation is formed by lacustrine, fluvial and debris flows deposits whose source area was located on NW side, with coalescent alluvial fans from where braided to psamitic meandering fluvial channels came. The location of the source area suggests no link with the Corumbataf River paleo-terraces.
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spelling Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)Contribution to the knowledge of the Rio Claro Formation, Region of Rio Claro, State of São PauloRio ClaroRio Claro formationTertiaryalluvial fanconglomeratecontour mapformation mechanismMesozoicPaleozoicquartzquartzitesandstoneBrazilSao Paulo [Brazil]South AmericaThe Rio Claro Formation mainly occurs in the county of Rio Claro (SP) lying unconformably on Paleozoic and Mesozoic rocks. Its thickness is 30-40 m. It shows fine to coarse, regular to poor sorted, Triable sandstones and conglomerates with quartzite and quartz clasts in the base. Thin layers of mudstone occur interbeded. Stratigraphic maps had been elaborated in recent analyses allowing to improve the knowledge about the formation. The biggest thicknesses occur on the east part of the studied area. The coarse/fine clastic ratio map demonstrates that fine sediments are concentrated in the east side, and suggests the existence of barriers which conditioned perennial water body (or bodies) where decantation took place (east, south and southeast sides). The structural contour map of the Rio Claro Formation base indicates a NW/SE trough which was the main depositional axis. The integrated analysis demonstrates that the formation is formed by lacustrine, fluvial and debris flows deposits whose source area was located on NW side, with coalescent alluvial fans from where braided to psamitic meandering fluvial channels came. The location of the source area suggests no link with the Corumbataf River paleo-terraces.A Formação Rio Claro ocorre em sua maior parte no município de Rio Claro (SP). Assenta-se discordantemente sobre rochas paleozóicas e mesozóicas. Sua espessura é de 30-40 m em poços da região. Apresenta arenitos finos a grossos, regular a mal selecionados, friáveis, tendo, na base, conglomerados com clastos de quartzito e quartzo. Intercaladas, ocorrem delgadas camadas de argilito. Em recentes análises, foi possível elaborar mapas estratigráficos que permitiram avançar no conhecimento da formação: as maiores espessuras ocorrem na porção leste da área de estudo; o mapa de razão clásticos grossos/finos indica a ocorrência preferencial de finos na região leste, sugerindo mecanismo de barramento, que condicionou a existência de corpo ou de corpos de água perene, com decantação de pelitos a leste, sul e sudeste; o mapa de contorno estrutural da base da formação define uma calha de direção NW/SE, que funcionou como eixo de deposição. A análise integrada indica que essa unidade contém depósitos lacustres, fluviais e de fluxos de detritos, com área-fonte a NW, com leques coalescentes, de onde derivavam canais entrelaçados a meandrantes psamíticos. O sentido de deposição (NW/SE) sugere que essa não corresponde a terraços (paleo-aluviões) do Rio Corumbataí.Departamento de Geologia Aplicada Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Avenida 24-A, 1515. Bela Vista, CEP 13506-900. Rio Claro, SPCentro de Pós-Graduação, Pesquisa e Extensão Universidade Guarulhos (UnG), Praca Tereza Cristina, 01. Centro, CEP 07023-070. Guarulhos, SPDepartamento de Geologia Aplicada Instituto de Geociências e Ciências Exatas Universidade Estadual Paulista, Avenida 24-A, 1515. Bela Vista, CEP 13506-900. Rio Claro, SPUniversidade Estadual Paulista (Unesp)Universidade Guarulhos (UnG)Perinotto, José Alexandre de Jesus [UNESP]Etchebehere, Mario Lincoln de CarlosZaine, José Eduardo [UNESP]Saad, Antonio Roberto [UNESP]2014-05-27T11:22:05Z2014-05-27T11:22:05Z2006-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article297-306application/pdfhttp://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/451Geociencias, v. 25, n. 3, p. 297-306, 2006.0101-9082http://hdl.handle.net/11449/693222-s2.0-342506773182-s2.0-34250677318.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporGeociências0,230info:eu-repo/semantics/openAccess2023-12-21T06:25:07Zoai:repositorio.unesp.br:11449/69322Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T20:57:09.982844Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
Contribution to the knowledge of the Rio Claro Formation, Region of Rio Claro, State of São Paulo
title Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
spellingShingle Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
Perinotto, José Alexandre de Jesus [UNESP]
Rio Claro
Rio Claro formation
Tertiary
alluvial fan
conglomerate
contour map
formation mechanism
Mesozoic
Paleozoic
quartz
quartzite
sandstone
Brazil
Sao Paulo [Brazil]
South America
title_short Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
title_full Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
title_fullStr Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
title_full_unstemmed Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
title_sort Nova contribuiçao ao conhecimento da formação Rio Claro (T) na Folha Rio Claro (SP)
author Perinotto, José Alexandre de Jesus [UNESP]
author_facet Perinotto, José Alexandre de Jesus [UNESP]
Etchebehere, Mario Lincoln de Carlos
Zaine, José Eduardo [UNESP]
Saad, Antonio Roberto [UNESP]
author_role author
author2 Etchebehere, Mario Lincoln de Carlos
Zaine, José Eduardo [UNESP]
Saad, Antonio Roberto [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Guarulhos (UnG)
dc.contributor.author.fl_str_mv Perinotto, José Alexandre de Jesus [UNESP]
Etchebehere, Mario Lincoln de Carlos
Zaine, José Eduardo [UNESP]
Saad, Antonio Roberto [UNESP]
dc.subject.por.fl_str_mv Rio Claro
Rio Claro formation
Tertiary
alluvial fan
conglomerate
contour map
formation mechanism
Mesozoic
Paleozoic
quartz
quartzite
sandstone
Brazil
Sao Paulo [Brazil]
South America
topic Rio Claro
Rio Claro formation
Tertiary
alluvial fan
conglomerate
contour map
formation mechanism
Mesozoic
Paleozoic
quartz
quartzite
sandstone
Brazil
Sao Paulo [Brazil]
South America
description The Rio Claro Formation mainly occurs in the county of Rio Claro (SP) lying unconformably on Paleozoic and Mesozoic rocks. Its thickness is 30-40 m. It shows fine to coarse, regular to poor sorted, Triable sandstones and conglomerates with quartzite and quartz clasts in the base. Thin layers of mudstone occur interbeded. Stratigraphic maps had been elaborated in recent analyses allowing to improve the knowledge about the formation. The biggest thicknesses occur on the east part of the studied area. The coarse/fine clastic ratio map demonstrates that fine sediments are concentrated in the east side, and suggests the existence of barriers which conditioned perennial water body (or bodies) where decantation took place (east, south and southeast sides). The structural contour map of the Rio Claro Formation base indicates a NW/SE trough which was the main depositional axis. The integrated analysis demonstrates that the formation is formed by lacustrine, fluvial and debris flows deposits whose source area was located on NW side, with coalescent alluvial fans from where braided to psamitic meandering fluvial channels came. The location of the source area suggests no link with the Corumbataf River paleo-terraces.
publishDate 2006
dc.date.none.fl_str_mv 2006-12-01
2014-05-27T11:22:05Z
2014-05-27T11:22:05Z
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://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/451
Geociencias, v. 25, n. 3, p. 297-306, 2006.
0101-9082
http://hdl.handle.net/11449/69322
2-s2.0-34250677318
2-s2.0-34250677318.pdf
url http://www.periodicos.rc.biblioteca.unesp.br/index.php/geociencias/article/view/451
http://hdl.handle.net/11449/69322
identifier_str_mv Geociencias, v. 25, n. 3, p. 297-306, 2006.
0101-9082
2-s2.0-34250677318
2-s2.0-34250677318.pdf
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Geociências
0,230
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 297-306
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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