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dc.contributor.author
Paesano Jr., Andrea
dc.contributor.author
Silva, Alexandre Christófaro
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Ivashita, Flávio Francisco
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Cerqueira Machado, Carla Fabiana
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Sives, Flavio Rubén
dc.contributor.author
Mercader, Roberto Carlos
dc.contributor.author
Fabris, José Domingos
dc.date.available
2017-09-06T22:42:40Z
dc.date.issued
2013-12
dc.identifier.citation
Paesano Jr., Andrea; Silva, Alexandre Christófaro; Ivashita, Flávio Francisco; Cerqueira Machado, Carla Fabiana; Sives, Flavio Rubén; et al.; Chemical reducing pedoenvironment in a peatland influenced by hematitic phyllite lithology in the southern Espinhaço chain, Brazil; Springer; Hyperfine Interactions; 226; 1-3; 12-2013; 585-592
dc.identifier.issn
0304-3843
dc.identifier.uri
http://hdl.handle.net/11336/23742
dc.description.abstract
A peatland in Pinheiro, Diamantina City, Minas Gerais State - Brazil, was sampled at different depths of two profiles with diverse vegetation coverings (grassland field and bush) in order to collect materials that might reflect changes in the chemical states of iron over the peat formation coming from original minerals such as hematitic phyllite surrounding the boggy pedon. Samples collected were chemically, structurally and magnetically characterized. The results show that both series of peats are composed of organic matter and minerals such as quartz, kaolinite, gibbsite, rutile and muscovite. Deeper layers present only quartz. Mössbauer spectroscopy shows that iron is present in both electron states, Fe2+ and Fe3+, under both vegetations, each valence appearing in the spectra in the form of a discrete doublet. No hyperfine magnetic splitting was observed in any spectrum at room temperature. The Mössbauer subspectral area of Fe2+ tended to increase from the upper to deeper layers. Magnetic measurements reveal that the magnetic response of the surface samples is the highest, displaying a sharp decrease below 15 cm and that the magnetic signal is a superposition of (super)paramagnetic and ferrimagnetic contributions. Samples from the grassland field also show a diamagnetic component for the deeper layers.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Peatland
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Iron Oxidation States
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Soil Organic Matters
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Hematitic Phyllites
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Oceanografía, Hidrología, Recursos Hídricos
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Chemical reducing pedoenvironment in a peatland influenced by hematitic phyllite lithology in the southern Espinhaço chain, Brazil
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2017-09-06T19:28:24Z
dc.identifier.eissn
1572-9540
dc.journal.volume
226
dc.journal.number
1-3
dc.journal.pagination
585-592
dc.journal.pais
Países Bajos
dc.journal.ciudad
Dordrecht
dc.description.fil
Fil: Paesano Jr., Andrea. Universidade Estadual de Maringá; Brasil
dc.description.fil
Fil: Silva, Alexandre Christófaro. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil
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Fil: Ivashita, Flávio Francisco. Universidade Estadual de Maringá; Brasil
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Fil: Cerqueira Machado, Carla Fabiana. Universidade Estadual de Maringá; Brasil
dc.description.fil
Fil: Sives, Flavio Rubén. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina
dc.description.fil
Fil: Mercader, Roberto Carlos. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Departamento de Física; Argentina
dc.description.fil
Fil: Fabris, José Domingos. Universidade Federal dos Vales do Jequitinhonha e Mucuri; Brasil
dc.journal.title
Hyperfine Interactions
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/article/10.1007%2Fs10751-013-0959-6
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s10751-013-0959-6
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