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| Brilhante,Stephany Alves; Santos,Jean Cheyson Barros dos; Souza Júnior,Valdomiro Severino de; Araújo,Jane Kelly Silva; Ribeiro Filho,Mateus Rosas; Corrêa,Marcelo Metri. |
| ABSTRACT Weathering and pedogenesis have been studied for a wide range of rocks and climates around the world. However, the eruption of rhyolitic magmas is a rare geological event, which leads to few studies associated with the rhyolite-soil-landscape relationship. In this context, this study evaluated the influence of rhyolite weathering on the properties of soils along a slope in an Atlantic Forest environment in the state of Pernambuco, northeastern Brazil. Four weathering profiles derived from rhyolites were classified and sampled for chemical, physical, mineralogical, micromorphological, differential thermal, and thermogravimetric analyses. The chemical properties reflect the original rock rich in felsic minerals, poor in bases, and the types of clay... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedogenesis; Halloysite; Toposequence; Acid crystalline rock. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832017000100312 |
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| Santos,Roseclênia Alves; Sermarini,Renata Alcarde; Guerra,Adriano Ribeiro; Santos,Jean Cheyson Barros dos; Azevedo,Antonio Carlos de. |
| ABSTRACT Saprolite plays a central role into hydrologic and nutrient cycles. Despite that, saprolite research is scattered and uses heterogeneous, sometimes conflicting, methods and concepts. During field work, it is difficult to assign the boundary between soil and saprolite. This paper aimed to identify the subjacent logic that pedologists use to assign to a regolith volume its soil or saprolite nature. To achieve this goal, a tree algorithm was used to build a hierarchy of physical and chemical properties of a set of regolith profiles. Such hierarchization expose the inner, subjective criteria used by researchers during the assignment of a certain profile zone as saprolite or soil. The following variables were measured: total porosity (TP); bulk density... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Regolite; Subsolum; Weathering; Classification system. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100302 |
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| Santos,Jean Cheyson Barros dos; Souza Júnior,Valdomiro Severino de; Corrêa,Marcelo Metri; Ribeiro,Mateus Rosas; Almeida,Maria da Conceição de; Borges,Lucila Ester Prado. |
| Estudos de caracterização de solos em regiões ainda pouco exploradas, além de disponibilizarem e ampliarem a base de informações sobre as mais distintas ordens de solos do território nacional, também permitem sistematizar informações sobre suas propriedades, que poderão servir de subsídio para o desenvolvimento de práticas de manejo e uso sustentável das terras. Entre os principais solos recorrentes na região semiárida pernambucana, destacam-se os Neossolos Regolíticos, os quais perfazem aproximadamente 27 % da superfície do Estado e recobrem importantes áreas voltadas à produção agrícola, especialmente à agricultura familiar. Considerando a possibilidade de ocorrência de Neossolos Regolíticos com distintas propriedades físicas, químicas ou mineralógicas,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pedogênese; Morfologia; Mineralogia; Caulinita. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000300001 |
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