Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil)
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jsames.2017.09.001 http://hdl.handle.net/11449/175438 |
Resumo: | Extensive flat plateaus are typical landforms in the cratonic compartment of tropical regions. Paleoclimate, pediplanation, laterization, and dissection have created complex and distinct geological, geomorphological, and pedological features in these landscapes. In the Brazilian territory, the flat plateau sculpted in sandstone of Marília Formation (Neocretaceous) belonging to the Sul-Americana surface presents a very clayey and pisolitic Ferralsol (Red and Yellow Latossolo in the Brazilian soil classification). The clayey texture of soil and the pisolites have been considered as weathering products of a Cenozoic detritical formation which is believed to overlay the Marília Formation sandstones. Using data of petrography (optical microscopy and SEM), mineralogy (RXD), and macroscopic structures (description in the field of the arrangement of horizons and layers), a complete profile of Ferralsol with ferricrete and pisolites was studied. The complex succession of facies is in conformity with a sedimentary structure of Serra da Galga member (uppermost member of Marília Formation). The hardening hematite concentration appears as layered accretions in the subparallel clayey lenses of sandstone saprolite, preserving its structure. Iron contents varied according to different soil fabrics. Higher concentrations of iron are found in the massive ferricrete or in pisolites in the mottled horizon. Kaolinite is a dominant clay mineral and shows two micro-organizations: (1) massive fabric intrinsic to the sedimentary rock, and (2) reworked in pisolites and illuviated features. The pisolites are relicts of ferricrete in the soft bioturbated topsoil. The continuous sequence of ferricrete from saprolite to the Ferralsol indicates that the regolith is autochthonous, developed directly from sandstones of Marília Formation, through a long and intense process of laterization. |
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Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil)Clayey FerralsolFerricreteMarília formationPisolitesSandstoneSouth American surfaceExtensive flat plateaus are typical landforms in the cratonic compartment of tropical regions. Paleoclimate, pediplanation, laterization, and dissection have created complex and distinct geological, geomorphological, and pedological features in these landscapes. In the Brazilian territory, the flat plateau sculpted in sandstone of Marília Formation (Neocretaceous) belonging to the Sul-Americana surface presents a very clayey and pisolitic Ferralsol (Red and Yellow Latossolo in the Brazilian soil classification). The clayey texture of soil and the pisolites have been considered as weathering products of a Cenozoic detritical formation which is believed to overlay the Marília Formation sandstones. Using data of petrography (optical microscopy and SEM), mineralogy (RXD), and macroscopic structures (description in the field of the arrangement of horizons and layers), a complete profile of Ferralsol with ferricrete and pisolites was studied. The complex succession of facies is in conformity with a sedimentary structure of Serra da Galga member (uppermost member of Marília Formation). The hardening hematite concentration appears as layered accretions in the subparallel clayey lenses of sandstone saprolite, preserving its structure. Iron contents varied according to different soil fabrics. Higher concentrations of iron are found in the massive ferricrete or in pisolites in the mottled horizon. Kaolinite is a dominant clay mineral and shows two micro-organizations: (1) massive fabric intrinsic to the sedimentary rock, and (2) reworked in pisolites and illuviated features. The pisolites are relicts of ferricrete in the soft bioturbated topsoil. The continuous sequence of ferricrete from saprolite to the Ferralsol indicates that the regolith is autochthonous, developed directly from sandstones of Marília Formation, through a long and intense process of laterization.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Universidade do Estado de São Paulo (UNESP) Departamento de Petrologia e Metalogenia (DPM), Av. 24A, 1515, Bela VistaUniversidade Federal de Goiás (UFG) Instituto de Estudos Sócio-Ambiental (IESA)University of São Paulo (USP) Núcleo de Pesquisa em Geoquímica e Geofísica da Litosfera e Instituto de Energia & Ambiente (NUPEGEL/IEA)Universidade de São Paulo (USP) Centro de Energia Nuclear na Agricultura e Núcleo de Pesquisa em Geoquímica e Geofísica da Litosfera (CENA/NUPEGEL)Universidade do Estado de São Paulo (UNESP) Centro de Estudos Ambientais (CEA)Universidade do Estado de São Paulo (UNESP) Departamento de Petrologia e Metalogenia (DPM), Av. 24A, 1515, Bela VistaUniversidade do Estado de São Paulo (UNESP) Centro de Estudos Ambientais (CEA)FAPESP: N° 2014/01131-4Universidade Estadual Paulista (Unesp)Universidade Federal de Goiás (UFG)Universidade de São Paulo (USP)Rosolen, Vania [UNESP]Bueno, Guilherme TaitsonMelfi, Adolpho JoséMontes, Célia Reginade Sousa Coelho, Carla Vanessa [UNESP]Ishida, Débora AyumiGovone, José Silvio [UNESP]2018-12-11T17:15:50Z2018-12-11T17:15:50Z2017-11-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article421-430application/pdfhttp://dx.doi.org/10.1016/j.jsames.2017.09.001Journal of South American Earth Sciences, v. 79, p. 421-430.0895-9811http://hdl.handle.net/11449/17543810.1016/j.jsames.2017.09.0012-s2.0-850328948042-s2.0-85032894804.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal of South American Earth Sciences0,829info:eu-repo/semantics/openAccess2024-01-03T06:19:33Zoai:repositorio.unesp.br:11449/175438Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-03T06:19:33Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
title |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
spellingShingle |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) Rosolen, Vania [UNESP] Clayey Ferralsol Ferricrete Marília formation Pisolites Sandstone South American surface |
title_short |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
title_full |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
title_fullStr |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
title_full_unstemmed |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
title_sort |
Evolution of iron crust and clayey Ferralsol in deeply weathered sandstones of Marília Formation (Western Minas Gerais State, Brazil) |
author |
Rosolen, Vania [UNESP] |
author_facet |
Rosolen, Vania [UNESP] Bueno, Guilherme Taitson Melfi, Adolpho José Montes, Célia Regina de Sousa Coelho, Carla Vanessa [UNESP] Ishida, Débora Ayumi Govone, José Silvio [UNESP] |
author_role |
author |
author2 |
Bueno, Guilherme Taitson Melfi, Adolpho José Montes, Célia Regina de Sousa Coelho, Carla Vanessa [UNESP] Ishida, Débora Ayumi Govone, José Silvio [UNESP] |
author2_role |
author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Universidade Federal de Goiás (UFG) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Rosolen, Vania [UNESP] Bueno, Guilherme Taitson Melfi, Adolpho José Montes, Célia Regina de Sousa Coelho, Carla Vanessa [UNESP] Ishida, Débora Ayumi Govone, José Silvio [UNESP] |
dc.subject.por.fl_str_mv |
Clayey Ferralsol Ferricrete Marília formation Pisolites Sandstone South American surface |
topic |
Clayey Ferralsol Ferricrete Marília formation Pisolites Sandstone South American surface |
description |
Extensive flat plateaus are typical landforms in the cratonic compartment of tropical regions. Paleoclimate, pediplanation, laterization, and dissection have created complex and distinct geological, geomorphological, and pedological features in these landscapes. In the Brazilian territory, the flat plateau sculpted in sandstone of Marília Formation (Neocretaceous) belonging to the Sul-Americana surface presents a very clayey and pisolitic Ferralsol (Red and Yellow Latossolo in the Brazilian soil classification). The clayey texture of soil and the pisolites have been considered as weathering products of a Cenozoic detritical formation which is believed to overlay the Marília Formation sandstones. Using data of petrography (optical microscopy and SEM), mineralogy (RXD), and macroscopic structures (description in the field of the arrangement of horizons and layers), a complete profile of Ferralsol with ferricrete and pisolites was studied. The complex succession of facies is in conformity with a sedimentary structure of Serra da Galga member (uppermost member of Marília Formation). The hardening hematite concentration appears as layered accretions in the subparallel clayey lenses of sandstone saprolite, preserving its structure. Iron contents varied according to different soil fabrics. Higher concentrations of iron are found in the massive ferricrete or in pisolites in the mottled horizon. Kaolinite is a dominant clay mineral and shows two micro-organizations: (1) massive fabric intrinsic to the sedimentary rock, and (2) reworked in pisolites and illuviated features. The pisolites are relicts of ferricrete in the soft bioturbated topsoil. The continuous sequence of ferricrete from saprolite to the Ferralsol indicates that the regolith is autochthonous, developed directly from sandstones of Marília Formation, through a long and intense process of laterization. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-11-01 2018-12-11T17:15:50Z 2018-12-11T17:15:50Z |
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://dx.doi.org/10.1016/j.jsames.2017.09.001 Journal of South American Earth Sciences, v. 79, p. 421-430. 0895-9811 http://hdl.handle.net/11449/175438 10.1016/j.jsames.2017.09.001 2-s2.0-85032894804 2-s2.0-85032894804.pdf |
url |
http://dx.doi.org/10.1016/j.jsames.2017.09.001 http://hdl.handle.net/11449/175438 |
identifier_str_mv |
Journal of South American Earth Sciences, v. 79, p. 421-430. 0895-9811 10.1016/j.jsames.2017.09.001 2-s2.0-85032894804 2-s2.0-85032894804.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal of South American Earth Sciences 0,829 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
421-430 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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1797790186607738880 |