Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia

Autores
Lisé Pronovost, Agathe; St Onge, Guillaume; Gogorza, Claudia Susana; Haberzettl, Torsten; Jouve, Guillaume; Francus, Pierre; Olhendorf, Christian; Gebhardt, Catalina; Zolitschka, Bernd; The Pasado Science Team
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The sedimentary archive from Laguna Potrok Aike is the only continuous record reaching back to the last Glacial period in continental southeastern Patagonia. Located in the path of the Southern Hemisphere westerly winds and in the source region of dust deposited in Antarctica during Glacial periods, southern Patagonia is a vantage point to reconstruct past changes in aeolian activity. Here we use high-resolution rock-magnetic and physical grain size data from site 2 of the International Continental scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO) in order to develop magnetic proxies of dust and wind intensity at 52°S since 51,200 cal BP. Rock-magnetic analysis indicatesthe magnetic mineral assemblage is dominated by detrital magnetite. Based on the estimated flux of magnetite to the lake and comparison with distal dust records from the Southern Ocean and Antarctica, kLFis interpreted as a dust indicator in the dust source of southern Patagonia at the millennial time scale, when ferrimagnetic grain size and coercivity influence areminimal. Comparison to physical grain-size data indicates that the median destructive field of isothermal remanent magnetization(MDFIRM) mostly reflects medium to coarse magnetite bearing silts typically transported by winds for short-term suspension. Comparison with wind-intensity proxies from the Southern Hemisphere during the last Glacial period and with regional records from Patagonia since the last deglaciation including marine, lacustrine and peat bog sediments as well as speleothems reveals similar variability with MDFIRMup to the centennial time scale. MDFIRMis interpreted as a wind-intensity proxy independent of moisture changes for southeastern Patagonia, with stronger winds capable of transporting coarser magnetite bearing silts to the lake.
Fil: Lisé Pronovost, Agathe. Université du Québec à Rimouski. Canada Research Chair in Marine Geology. Institut des sciences de la mer de Rimouski; Canadá. GEOTOP Research Center; Canadá
Fil: St Onge, Guillaume. Université du Québec à Rimouski. Canada Research Chair in Marine Geology. Institut des sciences de la mer de Rimouski; Canadá. GEOTOP Research Center; Canadá
Fil: Gogorza, Claudia Susana. 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: Haberzettl, Torsten. University Jena. Physical Geography. Institute of Geography; Alemania
Fil: Jouve, Guillaume. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Francus, Pierre. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Olhendorf, Christian. University of Bremen. Institute of Geography. GEOPOLAR; Alemania
Fil: Gebhardt, Catalina. Alfred Wegener Institute Helmholtz Centre of Polar and Marine Research; Alemania
Fil: Zolitschka, Bernd. University of Bremen. Institute of Geography. GEOPOLAR; Alemania
Fil: The Pasado Science Team.
Materia
Rock Magnetism
Wind Intensity Dust
Lake Sediments
Pasado
Southern Hemisphere
Wind Intensity
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/4598
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/4598
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern PatagoniaLisé Pronovost, AgatheSt Onge, GuillaumeGogorza, Claudia SusanaHaberzettl, TorstenJouve, GuillaumeFrancus, PierreOlhendorf, ChristianGebhardt, CatalinaZolitschka, BerndThe Pasado Science TeamRock MagnetismWind Intensity DustLake SedimentsPasadoSouthern HemisphereWind Intensityhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The sedimentary archive from Laguna Potrok Aike is the only continuous record reaching back to the last Glacial period in continental southeastern Patagonia. Located in the path of the Southern Hemisphere westerly winds and in the source region of dust deposited in Antarctica during Glacial periods, southern Patagonia is a vantage point to reconstruct past changes in aeolian activity. Here we use high-resolution rock-magnetic and physical grain size data from site 2 of the International Continental scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO) in order to develop magnetic proxies of dust and wind intensity at 52°S since 51,200 cal BP. Rock-magnetic analysis indicatesthe magnetic mineral assemblage is dominated by detrital magnetite. Based on the estimated flux of magnetite to the lake and comparison with distal dust records from the Southern Ocean and Antarctica, kLFis interpreted as a dust indicator in the dust source of southern Patagonia at the millennial time scale, when ferrimagnetic grain size and coercivity influence areminimal. Comparison to physical grain-size data indicates that the median destructive field of isothermal remanent magnetization(MDFIRM) mostly reflects medium to coarse magnetite bearing silts typically transported by winds for short-term suspension. Comparison with wind-intensity proxies from the Southern Hemisphere during the last Glacial period and with regional records from Patagonia since the last deglaciation including marine, lacustrine and peat bog sediments as well as speleothems reveals similar variability with MDFIRMup to the centennial time scale. MDFIRMis interpreted as a wind-intensity proxy independent of moisture changes for southeastern Patagonia, with stronger winds capable of transporting coarser magnetite bearing silts to the lake.Fil: Lisé Pronovost, Agathe. Université du Québec à Rimouski. Canada Research Chair in Marine Geology. Institut des sciences de la mer de Rimouski; Canadá. GEOTOP Research Center; CanadáFil: St Onge, Guillaume. Université du Québec à Rimouski. Canada Research Chair in Marine Geology. Institut des sciences de la mer de Rimouski; Canadá. GEOTOP Research Center; CanadáFil: Gogorza, Claudia Susana. 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: Haberzettl, Torsten. University Jena. Physical Geography. Institute of Geography; AlemaniaFil: Jouve, Guillaume. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; CanadáFil: Francus, Pierre. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; CanadáFil: Olhendorf, Christian. University of Bremen. Institute of Geography. GEOPOLAR; AlemaniaFil: Gebhardt, Catalina. Alfred Wegener Institute Helmholtz Centre of Polar and Marine Research; AlemaniaFil: Zolitschka, Bernd. University of Bremen. Institute of Geography. GEOPOLAR; AlemaniaFil: The Pasado Science Team.Elsevier2014-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4598Lisé Pronovost, Agathe; St Onge, Guillaume; Gogorza, Claudia Susana; Haberzettl, Torsten; Jouve, Guillaume; et al.; Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia; Elsevier; Earth and Planetary Science Letters; 411; 12-2014; 72-860012-821Xenginfo:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1016/j.epsl.2014.11.007info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0012821X14006980info:eu-repo/semantics/altIdentifier/issn/0012-821Xinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:37:50Zoai:ri.conicet.gov.ar:11336/4598instacron: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:34982025-10-22 11:37:51.182CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
title Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
spellingShingle Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
Lisé Pronovost, Agathe
Rock Magnetism
Wind Intensity Dust
Lake Sediments
Pasado
Southern Hemisphere
Wind Intensity
title_short Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
title_full Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
title_fullStr Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
title_full_unstemmed Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
title_sort Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia
dc.creator.none.fl_str_mv Lisé Pronovost, Agathe
St Onge, Guillaume
Gogorza, Claudia Susana
Haberzettl, Torsten
Jouve, Guillaume
Francus, Pierre
Olhendorf, Christian
Gebhardt, Catalina
Zolitschka, Bernd
The Pasado Science Team
author Lisé Pronovost, Agathe
author_facet Lisé Pronovost, Agathe
St Onge, Guillaume
Gogorza, Claudia Susana
Haberzettl, Torsten
Jouve, Guillaume
Francus, Pierre
Olhendorf, Christian
Gebhardt, Catalina
Zolitschka, Bernd
The Pasado Science Team
author_role author
author2 St Onge, Guillaume
Gogorza, Claudia Susana
Haberzettl, Torsten
Jouve, Guillaume
Francus, Pierre
Olhendorf, Christian
Gebhardt, Catalina
Zolitschka, Bernd
The Pasado Science Team
author2_role author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Rock Magnetism
Wind Intensity Dust
Lake Sediments
Pasado
Southern Hemisphere
Wind Intensity
topic Rock Magnetism
Wind Intensity Dust
Lake Sediments
Pasado
Southern Hemisphere
Wind Intensity
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv The sedimentary archive from Laguna Potrok Aike is the only continuous record reaching back to the last Glacial period in continental southeastern Patagonia. Located in the path of the Southern Hemisphere westerly winds and in the source region of dust deposited in Antarctica during Glacial periods, southern Patagonia is a vantage point to reconstruct past changes in aeolian activity. Here we use high-resolution rock-magnetic and physical grain size data from site 2 of the International Continental scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO) in order to develop magnetic proxies of dust and wind intensity at 52°S since 51,200 cal BP. Rock-magnetic analysis indicatesthe magnetic mineral assemblage is dominated by detrital magnetite. Based on the estimated flux of magnetite to the lake and comparison with distal dust records from the Southern Ocean and Antarctica, kLFis interpreted as a dust indicator in the dust source of southern Patagonia at the millennial time scale, when ferrimagnetic grain size and coercivity influence areminimal. Comparison to physical grain-size data indicates that the median destructive field of isothermal remanent magnetization(MDFIRM) mostly reflects medium to coarse magnetite bearing silts typically transported by winds for short-term suspension. Comparison with wind-intensity proxies from the Southern Hemisphere during the last Glacial period and with regional records from Patagonia since the last deglaciation including marine, lacustrine and peat bog sediments as well as speleothems reveals similar variability with MDFIRMup to the centennial time scale. MDFIRMis interpreted as a wind-intensity proxy independent of moisture changes for southeastern Patagonia, with stronger winds capable of transporting coarser magnetite bearing silts to the lake.
Fil: Lisé Pronovost, Agathe. Université du Québec à Rimouski. Canada Research Chair in Marine Geology. Institut des sciences de la mer de Rimouski; Canadá. GEOTOP Research Center; Canadá
Fil: St Onge, Guillaume. Université du Québec à Rimouski. Canada Research Chair in Marine Geology. Institut des sciences de la mer de Rimouski; Canadá. GEOTOP Research Center; Canadá
Fil: Gogorza, Claudia Susana. 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: Haberzettl, Torsten. University Jena. Physical Geography. Institute of Geography; Alemania
Fil: Jouve, Guillaume. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Francus, Pierre. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Olhendorf, Christian. University of Bremen. Institute of Geography. GEOPOLAR; Alemania
Fil: Gebhardt, Catalina. Alfred Wegener Institute Helmholtz Centre of Polar and Marine Research; Alemania
Fil: Zolitschka, Bernd. University of Bremen. Institute of Geography. GEOPOLAR; Alemania
Fil: The Pasado Science Team.
description The sedimentary archive from Laguna Potrok Aike is the only continuous record reaching back to the last Glacial period in continental southeastern Patagonia. Located in the path of the Southern Hemisphere westerly winds and in the source region of dust deposited in Antarctica during Glacial periods, southern Patagonia is a vantage point to reconstruct past changes in aeolian activity. Here we use high-resolution rock-magnetic and physical grain size data from site 2 of the International Continental scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO) in order to develop magnetic proxies of dust and wind intensity at 52°S since 51,200 cal BP. Rock-magnetic analysis indicatesthe magnetic mineral assemblage is dominated by detrital magnetite. Based on the estimated flux of magnetite to the lake and comparison with distal dust records from the Southern Ocean and Antarctica, kLFis interpreted as a dust indicator in the dust source of southern Patagonia at the millennial time scale, when ferrimagnetic grain size and coercivity influence areminimal. Comparison to physical grain-size data indicates that the median destructive field of isothermal remanent magnetization(MDFIRM) mostly reflects medium to coarse magnetite bearing silts typically transported by winds for short-term suspension. Comparison with wind-intensity proxies from the Southern Hemisphere during the last Glacial period and with regional records from Patagonia since the last deglaciation including marine, lacustrine and peat bog sediments as well as speleothems reveals similar variability with MDFIRMup to the centennial time scale. MDFIRMis interpreted as a wind-intensity proxy independent of moisture changes for southeastern Patagonia, with stronger winds capable of transporting coarser magnetite bearing silts to the lake.
publishDate 2014
dc.date.none.fl_str_mv 2014-12
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/4598
Lisé Pronovost, Agathe; St Onge, Guillaume; Gogorza, Claudia Susana; Haberzettl, Torsten; Jouve, Guillaume; et al.; Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia; Elsevier; Earth and Planetary Science Letters; 411; 12-2014; 72-86
0012-821X
url http://hdl.handle.net/11336/4598
identifier_str_mv Lisé Pronovost, Agathe; St Onge, Guillaume; Gogorza, Claudia Susana; Haberzettl, Torsten; Jouve, Guillaume; et al.; Rock-magnetic proxies of wind intensity and dust since 51,200 cal BP from lacustrine sediments of Laguna Potrok Aike, southeastern Patagonia; Elsevier; Earth and Planetary Science Letters; 411; 12-2014; 72-86
0012-821X
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://dx.doi.org/10.1016/j.epsl.2014.11.007
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0012821X14006980
info:eu-repo/semantics/altIdentifier/issn/0012-821X
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier
publisher.none.fl_str_mv Elsevier
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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