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Abstract
In this paper, we analyze the paleoclimatic and paleoenvironmental evolution of Laguna Yema in semi-arid Chaco region of Argentina over the past six hundred years. High resolution multiproxy studies of lake sediments utilize analyses of lithology, mineralogy, geochemistry, palynology, and are constrained by radiocarbon and gamma spectrometry dating. Laguna Yema sediments were mainly composed of well stratified fine sediments (silts and clays), with [ver mas...]
dc.contributor.authorSperanza, Flavio Cesar
dc.contributor.authorGiralt, Santiago
dc.contributor.authorLupo, Liliana Concepción
dc.contributor.authorKulemeyer, Julio José
dc.contributor.authorPereira, Elizabeth de los Ángeles
dc.contributor.authorClaramunt López, Bernat
dc.date.accessioned2019-05-20T13:54:50Z
dc.date.available2019-05-20T13:54:50Z
dc.date.issued2019-06
dc.identifier.issn0031-0182
dc.identifier.otherhttps://doi.org/10.1016/j.palaeo.2019.03.037
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0031018218308770
dc.identifier.urihttp://hdl.handle.net/20.500.12123/5156
dc.description.abstractIn this paper, we analyze the paleoclimatic and paleoenvironmental evolution of Laguna Yema in semi-arid Chaco region of Argentina over the past six hundred years. High resolution multiproxy studies of lake sediments utilize analyses of lithology, mineralogy, geochemistry, palynology, and are constrained by radiocarbon and gamma spectrometry dating. Laguna Yema sediments were mainly composed of well stratified fine sediments (silts and clays), with variable proportions of quartz, clays (illite) and feldspar (microcline and albite). Twelve light and heavy geochemical elements were registered. Most elements (Al, Si, K, Ti, Fe, Rb, Ba, and Br) are associated with illite and albite. Different material transport processes related to the changes in aridity and humidity of the basin were identified using the main mineralogical origins of geochemical elements. Palynological records indicate cycles of contraction and expansion of the lake, with an increase in concentration of Alternanthera aquatica during wet periods (expansion of lake), and an increase in Ambrosia, Poaceae and fern spores during dry periods (contraction of lake). These changes are linked to fluctuations in moisture conditions in the Subandean Mountains and semi-arid Chaco regions, in response to interactions between the South American Monsoon System (SAMS) and the South American Low Level Jet (SALLJ), which send warm and humid air to northern Argentina. In a regional context, the Laguna Yema records are in accordance with the analyses of the temporal and spatial pattern of moisture distribution for the last six centuries.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherElsevieres_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourcePalaeogeography, Palaeoclimatology, Palaeoecology 524 : 85-100 (June 2019)es_AR
dc.subjectPaleoclimatologíaes_AR
dc.subjectPalaeoclimatologyeng
dc.subjectMedio Ambientees_AR
dc.subjectEnvironmenteng
dc.subjectPalinologíaes_AR
dc.subjectPalynologyeng
dc.subjectSedimentoes_AR
dc.subjectSedimenteng
dc.subjectMineralogíaes_AR
dc.subjectMineralogyeng
dc.subject.otherRegión Chaco Semiárido, Argentinaes_AR
dc.titlePaleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred yearses_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA Yutoes_AR
dc.description.filFil: Speranza, Flavio Cesar. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Yuto; Argentina. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Cátedra de Ciencias de la Tierra; Argentinaes_AR
dc.description.filFil: Giralt, Santiago. Consejo Superior de Investigaciones Científicas (CSIC). Institute of Earth Sciences Jaume Almera; Españaes_AR
dc.description.filFil: Lupo, Liliana Concepción. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ecorregiones Andinas; Argentina. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Cátedra de Ecología General. Laboratorio de Palinología; Argentinaes_AR
dc.description.filFil: Kulemeyer, Julio José. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ecorregiones Andinas; Argentina. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Cátedra de Ciencias de la Tierra; Argentina. Universidad Nacional de Jujuy. Facultad de Ingeniería. Cátedra de Suelos; Argentina. Universidad Nacional de Jujuy. Instituto de Datación y Arqueometría. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Datación y Arqueometría; Argentinaes_AR
dc.description.filFil: Pereira, Elizabeth de los Ángeles. Universidad Nacional de Jujuy. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ecorregiones Andinas; Argentina. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Cátedra de Ecología General. Laboratorio de Palinología; Argentinaes_AR
dc.description.filFil: Claramunt López, Bernat. Universitat Autònoma de Barcelona. Facultat de Ciències. Centro de Investigación Ecológica y Aplicaciones Forestales; España. Universitat Autònoma de Barcelona. Facultat de Ciències. Departament de Biologia Animal, Biologia Vegetal y Ecologia. Unitat d'Ecologia; Españaes_AR
dc.subtypecientifico


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