Characteristics of color and iron oxides of clay fraction in Archeological Dark Earth in Apui region, southern Amazonas

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dc.contributor.authorAquino, Renato Eleoterio de [UNESP]
dc.contributor.authorMarques, Jose [UNESP]
dc.contributor.authorCosta Campos, Milton Cesar
dc.contributor.authorOliveira, Ivanildo Amorim de [UNESP]
dc.contributor.authorRabelo de Souza Bahia, Angelica Santos [UNESP]
dc.contributor.authorCoutrim dos Santos, Luis Antonio
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv Fed Amazonas
dc.contributor.institutionUniversidade Federal de Sergipe (UFS)
dc.date.accessioned2018-11-26T15:28:00Z
dc.date.available2018-11-26T15:28:00Z
dc.date.issued2016-01-15
dc.description.abstractOne of the marks left by prehistoric man in the Amazonas landscape are the dark-colored soil stains, Archeological Dark Earth (ADE), which are rich in organic matter, phosphorus and calcium. The color in this soil is presented as an attribute of difficult interpretation on the horizon, and the studies towards a better identification are important. In this sense, the objective of this study was to characterize the color and iron oxides of the ADE clay fraction in Apui region in southern Amazonas. Six trenches were opened, where these profiles were characterized morphologically, and also samples were collected per horizon for later performance of grain size analysis, flocculation, water clay dispersion and chemicals (pH in water and potassium chloride, calcium, magnesium, potassium, phosphorus, potential acidity, f, organic carbon and organic matter) and mineralogical analyses. The data were submitted to principal component analysis. Similar behavior in the studied profiles was found both in physical and chemical attributes. It was concluded that the hematite and goethite, determined by x-ray diffraction and diffuse reflectance spectroscopy, besides not presenting significant variations between the studied soils, present similar characteristics to non-anthropogenic Brazilian soils. The color measured by diffuse reflectance spectroscopy proved efficient to indicate variations among the ADEs, proving to be an innovative technique, efficient and promising for indirect quantification of soil characteristics in a simple and low cost manner. The results show that iron oxides demonstrate be sensitive indicators of pedoenvironmental conditions and pedogenic processes of Archeological Dark Earth. (C 2015 Elsevier BAT. All rights reserved.en
dc.description.affiliationSao Paulo State Univ, Agrarian & Vet Fac, Jaboticabal, SP, Brazil
dc.description.affiliationUniv Fed Amazonas, Inst Educ Agr & Environm, BR-69800000 Humaita, Amazonas, Brazil
dc.description.affiliationUniv Fed Santa Maria, Ctr Rural Sci, Dept Soil, BR-97105900 Santa Maria, RS, Brazil
dc.description.affiliationUnespSao Paulo State Univ, Agrarian & Vet Fac, Jaboticabal, SP, Brazil
dc.description.sponsorshipFundacao de Amparo a Pesquisa do Estado do Amazonas (FAPEAM)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent35-44
dc.identifierhttp://dx.doi.org/10.1016/j.geoderma.2015.07.010
dc.identifier.citationGeoderma. Amsterdam: Elsevier Science Bv, v. 262, p. 35-44, 2016.
dc.identifier.doi10.1016/j.geoderma.2015.07.010
dc.identifier.fileWOS000362308300004.pdf
dc.identifier.issn0016-7061
dc.identifier.urihttp://hdl.handle.net/11449/158532
dc.identifier.wosWOS:000362308300004
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofGeoderma
dc.relation.ispartofsjr1,717
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectAnthropogenic horizon
dc.subjectAnthropogenic soil
dc.subjectDiffuse reflectance spectra
dc.subjectHematite
dc.subjectGoethite
dc.titleCharacteristics of color and iron oxides of clay fraction in Archeological Dark Earth in Apui region, southern Amazonasen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.

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