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Registro Completo |
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Biblioteca(s): |
Embrapa Agrossilvipastoril. |
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Data corrente: |
02/12/2021 |
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Data da última atualização: |
02/12/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FIRMINO, F. H. T.; CAMÊLO, D. de L.; NASCIMENTO, A. F. do; LIMA, J. R. de S.; SOUZA JUNIOR, V.; ALMEIDA, B. G. de; CORRÊA, M. M. |
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Afiliação: |
FRANCIS HENRIQUE TENÓRIO FIRMINO, UFRPE, Recife-PE; DANILO DE LIMA CAMÊLO, UFES, Alegre-ES; ALEXANDRE FERREIRA DO NASCIMENTO, CPAMT; JOSÉ ROMUALDO DE SOUZA LIMA, UFAPE, Garanhuns-PE; VALDOMIRO SOUZA JUNIOR, UFRPE, Recife-PE; BRIVALDO GOMES DE ALMEIDA, UFRPE, Recife-PE; MARCELO METRI CORRÊA, UFAPE, Garanhuns-PE. |
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Título: |
Genesis of lamellae in sandy soils: A case study in a semi-arid region in NE-Brazil. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Geoderma, v. 406, 115447, 2022. |
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ISSN: |
0016-7061 |
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DOI: |
https://doi.org/10.1016/j.geoderma.2021.115447 |
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Idioma: |
Inglês |
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Conteúdo: |
The occurrence of lamellae in soils and sediments has direct implications for agricultural production, and for stratigraphic and geomorphological studies. Although lamellae have been studied for more than a century, their origin remains controversial. The aim of this study was to identify the origin and formation mechanisms of lamellae in autochthonous soils developed from metamorphic rocks in a semi-arid area of Northeast Brazil. As such, the spatial organization of soil profiles was evaluated in a topolithosequence, through structural analysis of the pedological coverage for subsequent soil sampling. Morphological, chemical, physical, sedimentological, mineralogical, and micromorphological analyses were carried out on the studied slope and in greater detail in four soil profiles. The results indicated that clay particles predominantly smaller than 0.2 µm are eluviated in a sandy soil matrix, infilling voids and coating quartz grains, which are organized in layers of densely packed fine sand, impeding clay translocation and helping form lamellae. Although the micromorphological properties of the lamellae demonstrate their pedogenic origin, the contribution of strips of polycrystalline quartz constitutes a petrogenic component of the illuviation process. Therefore, the genesis of the lamellae is better described based on a petro-pedogenic origin. We suggest a restructuring of the concept of petro-pedogenic origins, including the structural influence of metamorphic rocks, as illuviated clay deposition occurs in accordance with a physical barrier provoked by the increase and organization of fine sand particles, distributed horizontally and in parallel, arising from the disintegration of polycrystalline quartz grains, which indicates geological control in the genesis of lamellae, corresponding to petrogenic evidence. Furthermore, the morphological distinction of the lamellae seems to be more associated with the fine sand content (<0.25 mm), and its packing with larger grains of quartz in the soils. MenosThe occurrence of lamellae in soils and sediments has direct implications for agricultural production, and for stratigraphic and geomorphological studies. Although lamellae have been studied for more than a century, their origin remains controversial. The aim of this study was to identify the origin and formation mechanisms of lamellae in autochthonous soils developed from metamorphic rocks in a semi-arid area of Northeast Brazil. As such, the spatial organization of soil profiles was evaluated in a topolithosequence, through structural analysis of the pedological coverage for subsequent soil sampling. Morphological, chemical, physical, sedimentological, mineralogical, and micromorphological analyses were carried out on the studied slope and in greater detail in four soil profiles. The results indicated that clay particles predominantly smaller than 0.2 µm are eluviated in a sandy soil matrix, infilling voids and coating quartz grains, which are organized in layers of densely packed fine sand, impeding clay translocation and helping form lamellae. Although the micromorphological properties of the lamellae demonstrate their pedogenic origin, the contribution of strips of polycrystalline quartz constitutes a petrogenic component of the illuviation process. Therefore, the genesis of the lamellae is better described based on a petro-pedogenic origin. We suggest a restructuring of the concept of petro-pedogenic origins, including the structural influence of metamorphic rocks, as ... Mostrar Tudo |
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Thesagro: |
Solo Arenoso. |
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Thesaurus Nal: |
Clay; Geomorphology; Infiltration (hydrology); Metamorphic rocks; Quartz; Regosols; Sandy soils; Sediments; Semiarid soils; Semiarid zones; Stratigraphy. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 03044naa a2200361 a 4500
001 2136974
005 2021-12-02
008 2022 bl uuuu u00u1 u #d
022 $a0016-7061
024 7 $ahttps://doi.org/10.1016/j.geoderma.2021.115447$2DOI
100 1 $aFIRMINO, F. H. T.
245 $aGenesis of lamellae in sandy soils$bA case study in a semi-arid region in NE-Brazil.$h[electronic resource]
260 $c2022
520 $aThe occurrence of lamellae in soils and sediments has direct implications for agricultural production, and for stratigraphic and geomorphological studies. Although lamellae have been studied for more than a century, their origin remains controversial. The aim of this study was to identify the origin and formation mechanisms of lamellae in autochthonous soils developed from metamorphic rocks in a semi-arid area of Northeast Brazil. As such, the spatial organization of soil profiles was evaluated in a topolithosequence, through structural analysis of the pedological coverage for subsequent soil sampling. Morphological, chemical, physical, sedimentological, mineralogical, and micromorphological analyses were carried out on the studied slope and in greater detail in four soil profiles. The results indicated that clay particles predominantly smaller than 0.2 µm are eluviated in a sandy soil matrix, infilling voids and coating quartz grains, which are organized in layers of densely packed fine sand, impeding clay translocation and helping form lamellae. Although the micromorphological properties of the lamellae demonstrate their pedogenic origin, the contribution of strips of polycrystalline quartz constitutes a petrogenic component of the illuviation process. Therefore, the genesis of the lamellae is better described based on a petro-pedogenic origin. We suggest a restructuring of the concept of petro-pedogenic origins, including the structural influence of metamorphic rocks, as illuviated clay deposition occurs in accordance with a physical barrier provoked by the increase and organization of fine sand particles, distributed horizontally and in parallel, arising from the disintegration of polycrystalline quartz grains, which indicates geological control in the genesis of lamellae, corresponding to petrogenic evidence. Furthermore, the morphological distinction of the lamellae seems to be more associated with the fine sand content (<0.25 mm), and its packing with larger grains of quartz in the soils.
650 $aClay
650 $aGeomorphology
650 $aInfiltration (hydrology)
650 $aMetamorphic rocks
650 $aQuartz
650 $aRegosols
650 $aSandy soils
650 $aSediments
650 $aSemiarid soils
650 $aSemiarid zones
650 $aStratigraphy
650 $aSolo Arenoso
700 1 $aCAMÊLO, D. de L.
700 1 $aNASCIMENTO, A. F. do
700 1 $aLIMA, J. R. de S.
700 1 $aSOUZA JUNIOR, V.
700 1 $aALMEIDA, B. G. de
700 1 $aCORRÊA, M. M.
773 $tGeoderma$gv. 406, 115447, 2022.
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Embrapa Agrossilvipastoril (CPAMT) |
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