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dc.contributor.authorFONTES, M. P. F.pt_BR
dc.contributor.authorXAVIER, B. T. L.pt_BR
dc.contributor.authorKER, J. C.pt_BR
dc.contributor.authorLIMA, H. N.pt_BR
dc.contributor.authorSOUZA, K. W.pt_BR
dc.date.accessioned2015-04-24T11:11:11Zpt_BR
dc.date.available2015-04-24T11:11:11Zpt_BR
dc.date.created2015-04-24pt_BR
dc.date.issued2014pt_BR
dc.identifier.citationIn: CONGRESO LATINOAMERICANO DE LA CIENCIA DEL SUELO, 20.; CONGRESO PERUANO DE LA CIENCIA DEL SUELO, 16., 2014, Cusco. Educar para preservar el suelo y conservar la vida en la tierra. Cusco: Centro de Convenciones de la Municipalidad del Cusco, 2014. 1 Pendrive.pt_BR
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1014215pt_BR
dc.descriptionABSTRACT: The Amazonia Forest is an important biome that possesses great diversity of fauna and flora, which can play a significant role in several science areas, specially, the gene reserve for the future of humankind. Nevertheless, it is a very poorly understood environment, particularly the basis of this ecosystem, its soils. This study was conducted to gain insight in the mineralogy of important soils classes of the Amazonia sedimentary basin. The soils in the upland position in the landscape are developed from tertiary sediments belonging to the Alter do Chão series and those in the floodplain position are derived from quaternary, more specifically, Holocene´s sediments. Sand, silt and clay fractions were separated and X-ray diffraction analysis was conducted. Very simple mineralogy composed basically of quartz in the coarser fractions and kaolinite, goethite and anatase for the finer fraction was found for the Oxisol, the Ultisol and the Entisol from an upland toposequence but differences in kaolinite crystallography could be noticed among them. Gibbsite was virtually absent, in spite of the advanced degree of development of most of these soils. More distinctive mineralogy was revealed for the soils developed in the more recent sediments with quartz and feldspars in the sand and silt fractions and a suite of 2:1 minerals also appearing in their clay fraction, besides kaolinite and goethite. In one upland soil petroplinthite is the main feature and its mineralogy reflected its environment of formation which is usually associated with level to gently sloping areas with fluctuating water table.pt_BR
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectTerra firmept_BR
dc.titleMineralogy of some soils from the Amazonia Sedimentary Basin.pt_BR
dc.typeArtigo em anais e proceedingspt_BR
dc.date.updated2015-04-24T11:11:11Zpt_BR
dc.subject.thesagroSolopt_BR
dc.subject.thesagroSolo aluvialpt_BR
dc.subject.thesagroSolo argilosopt_BR
dc.subject.thesagroBacia sedimentarpt_BR
dc.subject.nalthesaurusSoilpt_BR
dc.subject.nalthesaurusAlluvial soilspt_BR
dc.subject.nalthesaurusUpland soilspt_BR
dc.subject.nalthesaurusClay mineralspt_BR
dc.subject.nalthesaurusSedimentary soilspt_BR
dc.subject.nalthesaurusBrazilpt_BR
dc.subject.nalthesaurusAmazoniapt_BR
riaa.ainfo.id1014215pt_BR
riaa.ainfo.lastupdate2015-04-24pt_BR
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