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Registro Completo |
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Biblioteca(s): |
Embrapa Agropecuária Oeste; Embrapa Cerrados; Embrapa Soja; Embrapa Unidades Centrais. |
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Data corrente: |
06/04/2006 |
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Data da última atualização: |
26/10/2009 |
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Autoria: |
MARTINS, J. C.; MARTINS, E. de S.; REATTO, A. |
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Título: |
Revisão de intemperismo de micas. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
Planaltina, DF: Embrapa Cerrados, 2004. |
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Páginas: |
48 p. |
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Série: |
(Embrapa Cerrados. Documentos, 123). |
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Idioma: |
Português |
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Conteúdo: |
ABSTRACT: The micas are rock forming mineral of the phyllosillicates group. The weathering of these minerals is fundamental in the understanding of potassium, silicon and magnesium liberation processes to the soil. the existent studies shown that the main factors that control the micas weathering are the pH of the solutions, the temperature, the size of the particles and the superficial area. The micas weathering is incongruous, in other words, always new minerals are formed as dissolution products, as vermiculite, kaolinite and goethite. These products can precipitate in the surface of the mica, especially the iron oxides of iron, and they impede the contact with its surface, reducing the dissolution kinetics. The structure of the micas is also a decisive factor in the dissolution kinetics. The dissolution kinetics presents the following decreasing order: phlogopite, biotite, and muscovite. |
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Palavras-Chave: |
Dissolução mineral; Experimental models; Intemperismo; Mineral dissolution; Modelo experimental. |
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Thesagro: |
Geologia; Mineralogia; Pedologia; Rocha; Solo. |
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Thesaurus Nal: |
mineralogy; soil; weathering. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPAC-2009/26903/1/doc_123.pdf
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Marc: |
LEADER 01687nam a2200313 a 4500
001 1568958
005 2009-10-26
008 2004 bl uuuu u0uu1 u #d
100 1 $aMARTINS, J. C.
245 $aRevisão de intemperismo de micas.
260 $aPlanaltina, DF: Embrapa Cerrados$c2004
300 $a48 p.
490 $a(Embrapa Cerrados. Documentos, 123).
520 $aABSTRACT: The micas are rock forming mineral of the phyllosillicates group. The weathering of these minerals is fundamental in the understanding of potassium, silicon and magnesium liberation processes to the soil. the existent studies shown that the main factors that control the micas weathering are the pH of the solutions, the temperature, the size of the particles and the superficial area. The micas weathering is incongruous, in other words, always new minerals are formed as dissolution products, as vermiculite, kaolinite and goethite. These products can precipitate in the surface of the mica, especially the iron oxides of iron, and they impede the contact with its surface, reducing the dissolution kinetics. The structure of the micas is also a decisive factor in the dissolution kinetics. The dissolution kinetics presents the following decreasing order: phlogopite, biotite, and muscovite.
650 $amineralogy
650 $asoil
650 $aweathering
650 $aGeologia
650 $aMineralogia
650 $aPedologia
650 $aRocha
650 $aSolo
653 $aDissolução mineral
653 $aExperimental models
653 $aIntemperismo
653 $aMineral dissolution
653 $aModelo experimental
700 1 $aMARTINS, E. de S.
700 1 $aREATTO, A.
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Registro original: |
Embrapa Cerrados (CPAC) |
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