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dc.contributor.authorSahoo, Prafulla Kumar
dc.contributor.authorFelix Guimaraes, Jose Tasso
dc.contributor.authorMartins Souza-Filho, Pedro Walfir
dc.contributor.authorSilva, Marcio Sousa da
dc.contributor.authorNascimento Junior, Wilson
dc.contributor.authorPowell, Mike A.
dc.contributor.authorReis, Luiza Santos
dc.contributor.authorRuiz Pessenda, Luiz Carlos
dc.contributor.authorRodrigues, TarcIsio Magevski
dc.contributor.authorSilva, Delmo Fonseca da
dc.contributor.authorCosta, Vladimir Eliodoro [UNESP]
dc.date.accessioned2018-11-26T17:44:23Z
dc.date.available2018-11-26T17:44:23Z
dc.date.issued2017-12-01
dc.identifierhttp://dx.doi.org/10.1016/j.jsames.2017.10.016
dc.identifier.citationJournal Of South American Earth Sciences. Oxford: Pergamon-elsevier Science Ltd, v. 80, p. 541-558, 2017.
dc.identifier.issn0895-9811
dc.identifier.urihttp://hdl.handle.net/11449/163640
dc.description.abstractLake Tres Irmas (LTI), the largest upland lake in the Brazilian Amazonia, located in Serra dos Carajas, was characterized using multi-elemental and isotope geochemistry (delta 13(C) and delta N-15) to understand the significance of organic and inorganic sources, weathering and sedimentary processes on the distribution of elements in lake bottom (surficial) sediments. Carbon and nitrogen isotopes from sedimentary organic matter suggest C3 terrestrial plants (forests > canga vegetation), macrophytes and freshwater DOC as the main sources. Sediments are depleted in most of the major oxides (except Fe2O3 and P2O5) when compared to upper continental crust (UCC) and their spatial distribution is highly influenced by catchment lithology. Principal Component Analysis revealed that most of the trace elements (Ba, Sr, Rb, Sc, Th, U, Zr, Hf, Nb, Y, V, Cr, Ga, Co, Ni) and REEs are closely correlated with Al and Ti (PC1; Group-1), so their redistribution is less influenced by post-depositional process. This is due to their relative immobility and being hosted by Al-bearing minerals during laterization. High Chemical Index of Alteration (CIA), Mafic Index of Alteration (MIA) and Index of Laterization (IOL) values indicate intense chemical weathering at source areas, but the weathering transformation was better quantified by IOL. A-CN-K plot along with elemental ratios (Al/K, Ti/K, Ti/zr, La/Al, Cr/Th, Co/Th, La/Sm, La/Gd, Zr/ Y, and Eu/Eu*) as well as chondrite-normalized REE patterns show that the detritic sediments are mainly sourced from ferruginous laterites and soils in the catchment, which may have characteristics similar to mafic rocks. (C) 2017 Elsevier Ltd. All rights reserved.en
dc.description.sponsorshipNational Forest of Carajas
dc.description.sponsorshipInstituto Tecnologico Vale (Paleoclimate Project)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.format.extent541-558
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofJournal Of South American Earth Sciences
dc.sourceWeb of Science
dc.subjectSediment geochemistry
dc.subjectUpland lakes
dc.subjectProvenance
dc.subjectCatchment lithology
dc.subjectAmazon region
dc.titleGeochemical characterization of the largest upland lake of the Brazilian Amazonia: Impact of provenance and processesen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
dc.contributor.institutionInst Tecnol Vale
dc.contributor.institutionUniv Fed Para
dc.contributor.institutionGeocon Environm Consulting
dc.contributor.institutionCtr Energia Nucl Agr
dc.contributor.institutionDept Ferrosos Norte
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)
dc.description.affiliationInst Tecnol Vale, Rua Boaventura da Silva 955, BR-66055090 Belem, Para, Brazil
dc.description.affiliationUniv Fed Para, Inst Geociencias, Programa Posgrad Geol & Geoquim, Av Augusta Correa 1, BR-66075110 Belem, Para, Brazil
dc.description.affiliationGeocon Environm Consulting, London, ON N6G 3H9, Canada
dc.description.affiliationCtr Energia Nucl Agr, Lab C-14,Av Centenario 303, BR-13400970 Piracicaba, SP, Brazil
dc.description.affiliationDept Ferrosos Norte, Gerencia Meio Ambiente Minas Carajas, Estr Raymundo Mascarenhas S-N Mina N4, BR-68516000 Parauapebas, Para, Brazil
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Ctr Isotopos Estaveis, Dist Rubiao Jr S-N, BR-18618970 Botucatu, SP, Brazil
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Ctr Isotopos Estaveis, Dist Rubiao Jr S-N, BR-18618970 Botucatu, SP, Brazil
dc.identifier.doi10.1016/j.jsames.2017.10.016
dc.identifier.wosWOS:000418211400035
dc.rights.accessRightsAcesso aberto
dc.description.sponsorshipIdNational Forest of Carajas: SISBIO 35594-2
dc.description.sponsorshipIdCNPq: 442088/2014-0
dc.description.sponsorshipIdCNPq: 302839/2016-0
dc.description.sponsorshipIdCNPq: 306450/2013-5
dc.identifier.fileWOS000418211400035.pdf
dc.relation.ispartofsjr0,829
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