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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/4599
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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 |
_version_ |
1844613849610715136 |
score |
13.070432 |