skip to main content
Visitante
Meu Espaço
Minha Conta
Sair
Identificação
This feature requires javascript
Tags
Revistas Eletrônicas (eJournals)
Livros Eletrônicos (eBooks)
Bases de Dados
Bibliotecas USP
Ajuda
Ajuda
Idioma:
Inglês
Espanhol
Português
This feature required javascript
This feature requires javascript
Primo Search
Busca Geral
Busca Geral
Acervo Físico
Acervo Físico
Produção Intelectual da USP
Produção USP
Search For:
Clear Search Box
Search in:
Busca Geral
Or hit Enter to replace search target
Or select another collection:
Search in:
Busca Geral
Busca Avançada
Busca por Índices
This feature requires javascript
This feature requires javascript
Potassium metasomatism of Precambrian paleosols
Novoselov, Alexey A. ; de Souza Filho, Carlos Roberto
Precambrian research, 2015-06, Vol.262, p.67-83
[Periódico revisado por pares]
Elsevier B.V
Texto completo disponível
Citações
Citado por
Exibir Online
Detalhes
Resenhas & Tags
Mais Opções
Nº de Citações
This feature requires javascript
Enviar para
Adicionar ao Meu Espaço
Remover do Meu Espaço
E-mail (máximo 30 registros por vez)
Imprimir
Link permanente
Referência
EasyBib
EndNote
RefWorks
del.icio.us
Exportar RIS
Exportar BibTeX
This feature requires javascript
Título:
Potassium metasomatism of Precambrian paleosols
Autor:
Novoselov, Alexey A.
;
de Souza Filho, Carlos Roberto
Assuntos:
Burial
;
Geochemical modeling
;
K-metasomatism
;
Precambrian paleosols
;
Weathering
É parte de:
Precambrian research, 2015-06, Vol.262, p.67-83
Descrição:
•K content in Precambrian paleosols greatly increased during post-burial alterations.•The composition of fluids promoted the resistance of primary basaltic minerals.•Pores were filled and alterations ceased at depth corresponding to 350°C.•Na, Mg, Ca were mobile elements; Al, Si, P, Ti, Fe contents did not change.•The Fe(II)/Fe(III) ratio was transformed during subsidence of weathering profiles. Independent of substratum composition, ancient regoliths formed by subaerial weathering are characterized by accumulation of K and other alkaline elements. Potassium enrichment due to the formation of clay-minerals is a trend typically observed in regoliths developed by modern hypergene processes. However, the K content in Precambrian paleosols is much higher than in modern weathering profiles. K-metasomatism affecting buried hypergen targets is a possible mechanism for K accumulation. A novel reaction-transport dissolution–precipitation model designed as part of this work proved able to reproduce many essential features of post-burial alterations of a subaerial weathering profile formed on basaltic rocks, including potassium enrichment, dehydration, compaction and pore filling that impacted the buried regolith. The phenomena of preservation of the primary basaltic structure, the apparent selective alteration of soil levels and immobility of Al, Ti and P could be explained by the model.
Editor:
Elsevier B.V
Idioma:
Inglês
This feature requires javascript
This feature requires javascript
Voltar para lista de resultados
This feature requires javascript
This feature requires javascript
Buscando em bases de dados remotas. Favor aguardar.
Buscando por
em
scope:(USP_VIDEOS),scope:("PRIMO"),scope:(USP_FISICO),scope:(USP_EREVISTAS),scope:(USP),scope:(USP_EBOOKS),scope:(USP_PRODUCAO),primo_central_multiple_fe
Mostrar o que foi encontrado até o momento
This feature requires javascript
This feature requires javascript