Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)

Autores
Irurzun, Maria Alicia; Orgeira, Maria Julia; Gogorza, Claudia Susana; Sinito, Ana Maria; Compagnucci, Rosa; Zolitschka, B.
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Lake sediments are excellent sources of palaeoenvironmental and palaeoclimatic information because they provide continuous and high-resolution records. South America is of particular interest because it is the only landmass that stretches southward into the Pacific and Atlantic Oceans towards Antarctica. The aim of this study is to explore the relationship of magnetic parameters with elemental and palaeobiological data of Laguna Potrok Aike to develop a model of lake-level changes and related hydrological and climatic fluctuations. Magnetic measurements were performed on subsamples from 15 500 cal. BP to the present, and associated rock magnetic parameters were calculated to infer magnetic mineralogy, concentration and grain size. According to the model, parameters dependent on magnetic concentration and grain size are directly related to lake-level changes. During dry periods, the remanent coercivity displays high values, whereas the proportion of magnetite is relatively low. Low percentages of greigite are observed, indicating that the water of the lake was stratified at least four times during the studied period, at approximately 10 300, 8900, 8500 and 8300 cal. BP. The preservation of greigite by inhibiting its complete transformation into pyrite is associated with a rapid burial that occurs with high sedimentation rates. Thermal stratification could be caused by a slight cooling in the area triggered by a weakening of the Westerlies and/or low activity of the sun, sum to the effect of a flood of melt water in the North Atlantic.
Fil: Irurzun, Maria Alicia. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Orgeira, Maria Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Gogorza, Claudia Susana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Sinito, Ana Maria. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Compagnucci, Rosa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Zolitschka, B.. Universitat de Bremen; Alemania
Materia
Environmental Magnetism
Late Pleistocene-Holocene
Potrok Aike
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/4673
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)Irurzun, Maria AliciaOrgeira, Maria JuliaGogorza, Claudia SusanaSinito, Ana MariaCompagnucci, RosaZolitschka, B.Environmental MagnetismLate Pleistocene-HolocenePotrok Aikehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Lake sediments are excellent sources of palaeoenvironmental and palaeoclimatic information because they provide continuous and high-resolution records. South America is of particular interest because it is the only landmass that stretches southward into the Pacific and Atlantic Oceans towards Antarctica. The aim of this study is to explore the relationship of magnetic parameters with elemental and palaeobiological data of Laguna Potrok Aike to develop a model of lake-level changes and related hydrological and climatic fluctuations. Magnetic measurements were performed on subsamples from 15 500 cal. BP to the present, and associated rock magnetic parameters were calculated to infer magnetic mineralogy, concentration and grain size. According to the model, parameters dependent on magnetic concentration and grain size are directly related to lake-level changes. During dry periods, the remanent coercivity displays high values, whereas the proportion of magnetite is relatively low. Low percentages of greigite are observed, indicating that the water of the lake was stratified at least four times during the studied period, at approximately 10 300, 8900, 8500 and 8300 cal. BP. The preservation of greigite by inhibiting its complete transformation into pyrite is associated with a rapid burial that occurs with high sedimentation rates. Thermal stratification could be caused by a slight cooling in the area triggered by a weakening of the Westerlies and/or low activity of the sun, sum to the effect of a flood of melt water in the North Atlantic.Fil: Irurzun, Maria Alicia. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Orgeira, Maria Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; ArgentinaFil: Gogorza, Claudia Susana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Sinito, Ana Maria. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; ArgentinaFil: Compagnucci, Rosa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; ArgentinaFil: Zolitschka, B.. Universitat de Bremen; AlemaniaWiley2014-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4673Irurzun, Maria Alicia; Orgeira, Maria Julia; Gogorza, Claudia Susana; Sinito, Ana Maria; Compagnucci, Rosa; et al.; Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina); Wiley; Geophysical Journal International; 198; 2; 6-2014; 710-7260956-540Xenginfo:eu-repo/semantics/altIdentifier/url/http://gji.oxfordjournals.org/content/198/2/710info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggu155info:eu-repo/semantics/altIdentifier/issn/0956-540Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:04:13Zoai:ri.conicet.gov.ar:11336/4673instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:04:14.108CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
title Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
spellingShingle Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
Irurzun, Maria Alicia
Environmental Magnetism
Late Pleistocene-Holocene
Potrok Aike
title_short Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
title_full Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
title_fullStr Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
title_full_unstemmed Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
title_sort Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina)
dc.creator.none.fl_str_mv Irurzun, Maria Alicia
Orgeira, Maria Julia
Gogorza, Claudia Susana
Sinito, Ana Maria
Compagnucci, Rosa
Zolitschka, B.
author Irurzun, Maria Alicia
author_facet Irurzun, Maria Alicia
Orgeira, Maria Julia
Gogorza, Claudia Susana
Sinito, Ana Maria
Compagnucci, Rosa
Zolitschka, B.
author_role author
author2 Orgeira, Maria Julia
Gogorza, Claudia Susana
Sinito, Ana Maria
Compagnucci, Rosa
Zolitschka, B.
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Environmental Magnetism
Late Pleistocene-Holocene
Potrok Aike
topic Environmental Magnetism
Late Pleistocene-Holocene
Potrok Aike
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Lake sediments are excellent sources of palaeoenvironmental and palaeoclimatic information because they provide continuous and high-resolution records. South America is of particular interest because it is the only landmass that stretches southward into the Pacific and Atlantic Oceans towards Antarctica. The aim of this study is to explore the relationship of magnetic parameters with elemental and palaeobiological data of Laguna Potrok Aike to develop a model of lake-level changes and related hydrological and climatic fluctuations. Magnetic measurements were performed on subsamples from 15 500 cal. BP to the present, and associated rock magnetic parameters were calculated to infer magnetic mineralogy, concentration and grain size. According to the model, parameters dependent on magnetic concentration and grain size are directly related to lake-level changes. During dry periods, the remanent coercivity displays high values, whereas the proportion of magnetite is relatively low. Low percentages of greigite are observed, indicating that the water of the lake was stratified at least four times during the studied period, at approximately 10 300, 8900, 8500 and 8300 cal. BP. The preservation of greigite by inhibiting its complete transformation into pyrite is associated with a rapid burial that occurs with high sedimentation rates. Thermal stratification could be caused by a slight cooling in the area triggered by a weakening of the Westerlies and/or low activity of the sun, sum to the effect of a flood of melt water in the North Atlantic.
Fil: Irurzun, Maria Alicia. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Orgeira, Maria Julia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Geociencias Básicas, Aplicadas y Ambientales de Buenos Aires; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias Geológicas; Argentina
Fil: Gogorza, Claudia Susana. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Sinito, Ana Maria. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Exactas. Instituto de Fisica Arroyo Seco; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina
Fil: Compagnucci, Rosa. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina
Fil: Zolitschka, B.. Universitat de Bremen; Alemania
description Lake sediments are excellent sources of palaeoenvironmental and palaeoclimatic information because they provide continuous and high-resolution records. South America is of particular interest because it is the only landmass that stretches southward into the Pacific and Atlantic Oceans towards Antarctica. The aim of this study is to explore the relationship of magnetic parameters with elemental and palaeobiological data of Laguna Potrok Aike to develop a model of lake-level changes and related hydrological and climatic fluctuations. Magnetic measurements were performed on subsamples from 15 500 cal. BP to the present, and associated rock magnetic parameters were calculated to infer magnetic mineralogy, concentration and grain size. According to the model, parameters dependent on magnetic concentration and grain size are directly related to lake-level changes. During dry periods, the remanent coercivity displays high values, whereas the proportion of magnetite is relatively low. Low percentages of greigite are observed, indicating that the water of the lake was stratified at least four times during the studied period, at approximately 10 300, 8900, 8500 and 8300 cal. BP. The preservation of greigite by inhibiting its complete transformation into pyrite is associated with a rapid burial that occurs with high sedimentation rates. Thermal stratification could be caused by a slight cooling in the area triggered by a weakening of the Westerlies and/or low activity of the sun, sum to the effect of a flood of melt water in the North Atlantic.
publishDate 2014
dc.date.none.fl_str_mv 2014-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
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info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/4673
Irurzun, Maria Alicia; Orgeira, Maria Julia; Gogorza, Claudia Susana; Sinito, Ana Maria; Compagnucci, Rosa; et al.; Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina); Wiley; Geophysical Journal International; 198; 2; 6-2014; 710-726
0956-540X
url http://hdl.handle.net/11336/4673
identifier_str_mv Irurzun, Maria Alicia; Orgeira, Maria Julia; Gogorza, Claudia Susana; Sinito, Ana Maria; Compagnucci, Rosa; et al.; Magnetic parameters and their palaeoclimatic implications the sediment record of the last 15 500 cal. BP from Laguna Potrok Aike (Argentina); Wiley; Geophysical Journal International; 198; 2; 6-2014; 710-726
0956-540X
dc.language.none.fl_str_mv eng
language eng
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info:eu-repo/semantics/altIdentifier/doi/10.1093/gji/ggu155
info:eu-repo/semantics/altIdentifier/issn/0956-540X
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dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
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repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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