Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years
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 constr...
| Autores principales: | , , , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Elsevier
2019
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| Materias: | |
| Acceso en línea: | https://www.sciencedirect.com/science/article/pii/S0031018218308770 http://hdl.handle.net/20.500.12123/5156 https://doi.org/10.1016/j.palaeo.2019.03.037 |
| _version_ | 1855483566249476096 |
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| author | Speranza, Flavio Cesar Giralt, Santiago Concepción Lupo, Liliana Kulemeyer, Julio José Pereira, Elizabeth de los Ángeles Claramunt López, Bernat |
| author_browse | Claramunt López, Bernat Concepción Lupo, Liliana Giralt, Santiago Kulemeyer, Julio José Pereira, Elizabeth de los Ángeles Speranza, Flavio Cesar |
| author_facet | Speranza, Flavio Cesar Giralt, Santiago Concepción Lupo, Liliana Kulemeyer, Julio José Pereira, Elizabeth de los Ángeles Claramunt López, Bernat |
| author_sort | Speranza, Flavio Cesar |
| collection | INTA Digital |
| description | 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 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. |
| format | Artículo |
| id | INTA5156 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2019 |
| publishDateRange | 2019 |
| publishDateSort | 2019 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| record_format | dspace |
| spelling | INTA51562022-11-09T17:18:51Z Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years Speranza, Flavio Cesar Giralt, Santiago Concepción Lupo, Liliana Kulemeyer, Julio José Pereira, Elizabeth de los Ángeles Claramunt López, Bernat Paleoclimatología Medio Ambiente Palinología Sedimento Mineralogía Palaeoclimatology Environment Palynology Sediment Mineralogy Región Chaco Semiárido, Argentina 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 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. EEA Yuto Fil: 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; Argentina Fil: Giralt, Santiago. Consejo Superior de Investigaciones Científicas (CSIC). Institute of Earth Sciences Jaume Almera; España Fil: 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; Argentina Fil: 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; Argentina Fil: 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; Argentina Fil: 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; España 2019-05-20T13:54:50Z 2019-05-20T13:54:50Z 2019-06 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://www.sciencedirect.com/science/article/pii/S0031018218308770 http://hdl.handle.net/20.500.12123/5156 0031-0182 https://doi.org/10.1016/j.palaeo.2019.03.037 eng info:eu-repo/semantics/restrictedAccess application/pdf Elsevier Palaeogeography, Palaeoclimatology, Palaeoecology 524 : 85-100 (June 2019) |
| spellingShingle | Paleoclimatología Medio Ambiente Palinología Sedimento Mineralogía Palaeoclimatology Environment Palynology Sediment Mineralogy Región Chaco Semiárido, Argentina Speranza, Flavio Cesar Giralt, Santiago Concepción Lupo, Liliana Kulemeyer, Julio José Pereira, Elizabeth de los Ángeles Claramunt López, Bernat Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years |
| title | Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years |
| title_full | Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years |
| title_fullStr | Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years |
| title_full_unstemmed | Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years |
| title_short | Paleoenvironmental reconstruction of the semi-arid Chaco region of Argentina based on multiproxy lake records over the last six hundred years |
| title_sort | paleoenvironmental reconstruction of the semi arid chaco region of argentina based on multiproxy lake records over the last six hundred years |
| topic | Paleoclimatología Medio Ambiente Palinología Sedimento Mineralogía Palaeoclimatology Environment Palynology Sediment Mineralogy Región Chaco Semiárido, Argentina |
| url | https://www.sciencedirect.com/science/article/pii/S0031018218308770 http://hdl.handle.net/20.500.12123/5156 https://doi.org/10.1016/j.palaeo.2019.03.037 |
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