Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike

Autores
Lisé Pronovost, A.; St Onge, G.; Gogorza, Claudia Susana; Jouve, G.; Francus, P.; Zolitschka, B.; The Pasado Science Team
Año de publicación
2014
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A 106-m long sediment sequence from the maar lake Laguna Potrok Aike in southern Patagonia was recovered in the framework of the International Continental Scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO). About half of the sedimentary sequence is composed of mass movement deposits (MMDs) and the event-corrected record reaches back to 51,200 cal BP. Here we present a high-resolution rock-magnetic study revealing two sedimentary facies associated with MMDs and characterized by two different types of spurious gyroremanent magnetization (GRM) acquired during static alternating field demagnetization. The first rock-magnetic signature is detected in MMDs composed of reworked sand and tephra material. The signature consists of GRM acquired during demagnetization of the natural remanent magnetization (NRM) and other rockmagnetic properties typical of iron sulfides such as greigite. We interpret these intervals as authigenic formation of iron sulfides in suboxic conditions within the MMD. The second rock-magnetic signature consists of a series of 10 short intervals located on the top of MMDs characterized by GRM acquisition during demagnetization of the isothermal remanent magnetization (IRM). Based on geological, limnological, stratigraphic and climatic evidence these layers are interpreted as reflecting pedogenic hematite and/or goethite brought to the lake by runoff events related to precipitation and permafrost melt. The pedogenic iron minerals mobilized from the catchment most likely settled out of suspension on top of MMDs after a rapid remobilization event. The series of runoff events corresponds to periods of increased lacustrine productivity in Laguna Potrok Aike and are coeval within the limit of the chronology to warm periods of the Last Glacial as recorded in Antarctica, the deglaciation in the mid-latitudes of the Southern Hemisphere and enhanced precipitation during the Early Holocene in southeastern Patagonia
Fil: Lisé Pronovost, A.. Universit e du Qu ebec a Rimouski. Institut des sciences de la mer de Rimouski. Canada Research Chair in Marine Geology; Canadá. GEOTOP Research Center; Canadá
Fil: St Onge, G.. Universit e du Qu ebec a Rimouski. Institut des sciences de la mer de Rimouski. Canada Research Chair in Marine Geology; 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: Jouve, G.. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Francus, P.. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Zolitschka, B.. University of Bremen. Institute of Geography. GEOPOLAR; Alemania
Fil: The Pasado Science Team.
Materia
Rock Magnetism
Laguna Potrok Aike
Lacustrine Sediment
Paleoenvironment
Mass Movement Deposit
Gyroremanent Magnetization
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:11336/4599

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oai_identifier_str oai:ri.conicet.gov.ar:11336/4599
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok AikeLisé Pronovost, A.St Onge, G.Gogorza, Claudia SusanaJouve, G.Francus, P.Zolitschka, B.The Pasado Science TeamRock MagnetismLaguna Potrok AikeLacustrine SedimentPaleoenvironmentMass Movement DepositGyroremanent Magnetizationhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A 106-m long sediment sequence from the maar lake Laguna Potrok Aike in southern Patagonia was recovered in the framework of the International Continental Scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO). About half of the sedimentary sequence is composed of mass movement deposits (MMDs) and the event-corrected record reaches back to 51,200 cal BP. Here we present a high-resolution rock-magnetic study revealing two sedimentary facies associated with MMDs and characterized by two different types of spurious gyroremanent magnetization (GRM) acquired during static alternating field demagnetization. The first rock-magnetic signature is detected in MMDs composed of reworked sand and tephra material. The signature consists of GRM acquired during demagnetization of the natural remanent magnetization (NRM) and other rockmagnetic properties typical of iron sulfides such as greigite. We interpret these intervals as authigenic formation of iron sulfides in suboxic conditions within the MMD. The second rock-magnetic signature consists of a series of 10 short intervals located on the top of MMDs characterized by GRM acquisition during demagnetization of the isothermal remanent magnetization (IRM). Based on geological, limnological, stratigraphic and climatic evidence these layers are interpreted as reflecting pedogenic hematite and/or goethite brought to the lake by runoff events related to precipitation and permafrost melt. The pedogenic iron minerals mobilized from the catchment most likely settled out of suspension on top of MMDs after a rapid remobilization event. The series of runoff events corresponds to periods of increased lacustrine productivity in Laguna Potrok Aike and are coeval within the limit of the chronology to warm periods of the Last Glacial as recorded in Antarctica, the deglaciation in the mid-latitudes of the Southern Hemisphere and enhanced precipitation during the Early Holocene in southeastern PatagoniaFil: Lisé Pronovost, A.. Universit e du Qu ebec a Rimouski. Institut des sciences de la mer de Rimouski. Canada Research Chair in Marine Geology; Canadá. GEOTOP Research Center; CanadáFil: St Onge, G.. Universit e du Qu ebec a Rimouski. Institut des sciences de la mer de Rimouski. Canada Research Chair in Marine Geology; 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: Jouve, G.. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; CanadáFil: Francus, P.. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; CanadáFil: Zolitschka, B.. University of Bremen. Institute of Geography. GEOPOLAR; AlemaniaFil: The Pasado Science Team.Elsevier2014-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/4599Lisé Pronovost, A.; St Onge, G.; Gogorza, Claudia Susana; Jouve, G.; Francus, P.; et al.; Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike; Elsevier; Quaternary Science Reviews; 98; 5-2014; 110-1250277-3791enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2014.05.029info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277379114002108info:eu-repo/semantics/altIdentifier/issn/0277-3791info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:03:22Zoai:ri.conicet.gov.ar:11336/4599instacron: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 10:03:23.244CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
title Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
spellingShingle Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
Lisé Pronovost, A.
Rock Magnetism
Laguna Potrok Aike
Lacustrine Sediment
Paleoenvironment
Mass Movement Deposit
Gyroremanent Magnetization
title_short Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
title_full Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
title_fullStr Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
title_full_unstemmed Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
title_sort Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike
dc.creator.none.fl_str_mv Lisé Pronovost, A.
St Onge, G.
Gogorza, Claudia Susana
Jouve, G.
Francus, P.
Zolitschka, B.
The Pasado Science Team
author Lisé Pronovost, A.
author_facet Lisé Pronovost, A.
St Onge, G.
Gogorza, Claudia Susana
Jouve, G.
Francus, P.
Zolitschka, B.
The Pasado Science Team
author_role author
author2 St Onge, G.
Gogorza, Claudia Susana
Jouve, G.
Francus, P.
Zolitschka, B.
The Pasado Science Team
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Rock Magnetism
Laguna Potrok Aike
Lacustrine Sediment
Paleoenvironment
Mass Movement Deposit
Gyroremanent Magnetization
topic Rock Magnetism
Laguna Potrok Aike
Lacustrine Sediment
Paleoenvironment
Mass Movement Deposit
Gyroremanent Magnetization
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv A 106-m long sediment sequence from the maar lake Laguna Potrok Aike in southern Patagonia was recovered in the framework of the International Continental Scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO). About half of the sedimentary sequence is composed of mass movement deposits (MMDs) and the event-corrected record reaches back to 51,200 cal BP. Here we present a high-resolution rock-magnetic study revealing two sedimentary facies associated with MMDs and characterized by two different types of spurious gyroremanent magnetization (GRM) acquired during static alternating field demagnetization. The first rock-magnetic signature is detected in MMDs composed of reworked sand and tephra material. The signature consists of GRM acquired during demagnetization of the natural remanent magnetization (NRM) and other rockmagnetic properties typical of iron sulfides such as greigite. We interpret these intervals as authigenic formation of iron sulfides in suboxic conditions within the MMD. The second rock-magnetic signature consists of a series of 10 short intervals located on the top of MMDs characterized by GRM acquisition during demagnetization of the isothermal remanent magnetization (IRM). Based on geological, limnological, stratigraphic and climatic evidence these layers are interpreted as reflecting pedogenic hematite and/or goethite brought to the lake by runoff events related to precipitation and permafrost melt. The pedogenic iron minerals mobilized from the catchment most likely settled out of suspension on top of MMDs after a rapid remobilization event. The series of runoff events corresponds to periods of increased lacustrine productivity in Laguna Potrok Aike and are coeval within the limit of the chronology to warm periods of the Last Glacial as recorded in Antarctica, the deglaciation in the mid-latitudes of the Southern Hemisphere and enhanced precipitation during the Early Holocene in southeastern Patagonia
Fil: Lisé Pronovost, A.. Universit e du Qu ebec a Rimouski. Institut des sciences de la mer de Rimouski. Canada Research Chair in Marine Geology; Canadá. GEOTOP Research Center; Canadá
Fil: St Onge, G.. Universit e du Qu ebec a Rimouski. Institut des sciences de la mer de Rimouski. Canada Research Chair in Marine Geology; 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: Jouve, G.. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Francus, P.. GEOTOP Research Center; Canadá. Institut National de la Recherche Scientifique. Centre Eau, Terre et Environnement; Canadá
Fil: Zolitschka, B.. University of Bremen. Institute of Geography. GEOPOLAR; Alemania
Fil: The Pasado Science Team.
description A 106-m long sediment sequence from the maar lake Laguna Potrok Aike in southern Patagonia was recovered in the framework of the International Continental Scientific Drilling Program (ICDP) Potrok Aike maar lake Sediment Archive Drilling prOject (PASADO). About half of the sedimentary sequence is composed of mass movement deposits (MMDs) and the event-corrected record reaches back to 51,200 cal BP. Here we present a high-resolution rock-magnetic study revealing two sedimentary facies associated with MMDs and characterized by two different types of spurious gyroremanent magnetization (GRM) acquired during static alternating field demagnetization. The first rock-magnetic signature is detected in MMDs composed of reworked sand and tephra material. The signature consists of GRM acquired during demagnetization of the natural remanent magnetization (NRM) and other rockmagnetic properties typical of iron sulfides such as greigite. We interpret these intervals as authigenic formation of iron sulfides in suboxic conditions within the MMD. The second rock-magnetic signature consists of a series of 10 short intervals located on the top of MMDs characterized by GRM acquisition during demagnetization of the isothermal remanent magnetization (IRM). Based on geological, limnological, stratigraphic and climatic evidence these layers are interpreted as reflecting pedogenic hematite and/or goethite brought to the lake by runoff events related to precipitation and permafrost melt. The pedogenic iron minerals mobilized from the catchment most likely settled out of suspension on top of MMDs after a rapid remobilization event. The series of runoff events corresponds to periods of increased lacustrine productivity in Laguna Potrok Aike and are coeval within the limit of the chronology to warm periods of the Last Glacial as recorded in Antarctica, the deglaciation in the mid-latitudes of the Southern Hemisphere and enhanced precipitation during the Early Holocene in southeastern Patagonia
publishDate 2014
dc.date.none.fl_str_mv 2014-05
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/11336/4599
Lisé Pronovost, A.; St Onge, G.; Gogorza, Claudia Susana; Jouve, G.; Francus, P.; et al.; Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike; Elsevier; Quaternary Science Reviews; 98; 5-2014; 110-125
0277-3791
url http://hdl.handle.net/11336/4599
identifier_str_mv Lisé Pronovost, A.; St Onge, G.; Gogorza, Claudia Susana; Jouve, G.; Francus, P.; et al.; Rock-magnetic signature of precipitation and extreme runoff events in southeastern Patagonia since 51200 cal BP from the sediment of Lake Laguna Potrok Aike; Elsevier; Quaternary Science Reviews; 98; 5-2014; 110-125
0277-3791
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2014.05.029
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277379114002108
info:eu-repo/semantics/altIdentifier/issn/0277-3791
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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