Age of depositional and weathering events in Central Amazonia

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dc.contributor.authorSant'Anna, Lucy Gomes
dc.contributor.authorSoares, Emilio Alberto do Amaral
dc.contributor.authorRiccomini, Claudio
dc.contributor.authorTatumi, Sonia Hatsue [UNIFESP]
dc.contributor.authorYee, Márcio [UNIFESP]
dc.date.accessioned2019-08-19T11:49:44Z
dc.date.available2019-08-19T11:49:44Z
dc.date.issued2017
dc.description.abstractIn the last three decades, several studies have been devoted to understanding the role of Late Pleistocene Holocene climate changes in the Amazonia lowlands environment. However, most of these studies used data obtained from sedimentary deposits (lakes, swamps, and colluvium) located away from the central plain or on the edges of the Amazonia region. This article integrates optically stimulated luminescence and accelerated mass spectrometry C-14 ages with sedimentological and geomorphological data obtained during this study or compiled from the literature for fluvial and lacustrine deposits of the central alluvial plain of the Solimoes-Amazon River. The age data allow us to present a chronological framework for the Late Pleistocene Holocene deposits and conclude that (i) the dryness of the LGM in central Amazonia lowlands is recorded by the formation of fluvial terraces and their weathering to pedogenic hematite between 25.3 ka and 17.7 kaen
dc.description.abstract(ii) floodplain deposition was contemporaneous with terrace weathering and occurred in a context of decreased water volume in fluvial channels, lowering of river base level and sea level, and isostatic rebound of the continenten
dc.description.abstractand (iii) lateral and mid-channel fluvial bars in the Solimoes-Amazon River have a minimum age of 11.5 1.5 ka, and their deposition responded to increased precipitation at the beginning of the Holocene. (C) 2017 Elsevier Ltd. All rights reserved.en
dc.description.affiliationUniv São Paulo, Sch Arts Sci & Humanittes, Av Arlindo Bettio 1000, BR-03828000 São Paulo, SP, Brazil
dc.description.affiliationUniv São Paulo, Inst Energy & Environm, Av Prof Luciano Gualberto 1289, BR-05508010 São Paulo, SP, Brazil
dc.description.affiliationUniv Fed Amazonas, Inst Exact Sci, Dept Geosci, Av Gen Rodrigo Octavio Jordao Ramos,6200, BR-69077000 Manaus, Amazonas, Brazil
dc.description.affiliationUniv São Paulo, Inst Geosci, Rua Lago 562, BR-05508080 São Paulo, SP, Brazil
dc.description.affiliationUniv Fed São Paulo, Campus Baixada Santista,Avenida Saldanha,Gama 89, BR-11030400 São Paulo, SP, Brazil
dc.description.affiliationUnifespUniv Fed São Paulo, Campus Baixada Santista,Avenida Saldanha,Gama 89, BR-11030400 São Paulo, SP, Brazil
dc.description.sourceWeb of Science
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIDFAPESP: 2007/58319-1
dc.description.sponsorshipIDFAPESP: 2009/53198-7
dc.description.sponsorshipIDFAPESP: 2010/01807-7
dc.description.sponsorshipIDCNPQ: 307871/2010-0
dc.format.extent82-97
dc.identifierhttps://dx.doi.org/10.1016/j.quascirev.2017.06.015
dc.identifier.citationQuaternary Science Reviews. Oxford, v. 170, p. 82-97, 2017.
dc.identifier.doi10.1016/j.quascirev.2017.06.015
dc.identifier.issn0277-3791
dc.identifier.urihttps://repositorio.unifesp.br/handle/11600/51392
dc.identifier.wosWOS:000407524000007
dc.language.isoeng
dc.publisherPergamon-Elsevier Science Ltd
dc.rightsinfo:eu-repo/semantics/restrictedAccess
dc.subjectAmazoniaen
dc.subjectAlluvial plainen
dc.subjectOSL datingen
dc.subjectIron oxideen
dc.subjectPleistoceneen
dc.subjectLGMen
dc.titleAge of depositional and weathering events in Central Amazoniaen
dc.typeinfo:eu-repo/semantics/article
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