Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia

Autores
Waldmann, Nicolas; Ariztegui, Daniel; Anselmetti, Flavio S.; Coronato, Andrea Maria Josefa; Austin Jr., James A.
Año de publicación
2010
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
The Island of Tierra del Fuego, at the southernmost extreme of Patagonia, is located in one of the most extensively glaciated areas of the Southern Hemisphere outside Antarctica during the late Pleistocene. The Lago Fagnano region, at ∼54°30′S and ∼68°W, has experienced several phases of glacier growth and retreat since the Last Glacial Maximum (LGM). We illustrate these phases using combined geomorphological, geophysical and coring surveys in Lago Fagnano itself, a ∼105 km-long, E–W-oriented glacio-tectonic basin. We identify and map a complex set of submerged frontal, central and lateral moraines covered by lacustrine sediments using seismic stratigraphic analysis of multi-channel profiles imaging the sub-lake floor. We then combine these geophysical data with field observations and regional maps of similar structures around the lake to reconstruct the spatial behavior of the Fagnano paleo-glacier since the LGM. We interpret the preserved frontal moraines as having formed during at least 20 re-advance stages of the glacier within a long-term deglaciation interval post-LGM. Preliminary tephrochronological dating of a ∼7.5 m long core indicates a step-wise deglaciation pattern comprising a final glacier re-advance stage at ∼11.2 ka BP.
Fil: Waldmann, Nicolas. Universidad de Ginebra; Suiza
Fil: Ariztegui, Daniel. Universidad de Ginebra; Suiza
Fil: Anselmetti, Flavio S.. Swiss Federal Institute of Aquatic Science and Technology. Department of Surface Waters; Suiza
Fil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Austin Jr., James A.. University of Texas at Austin; Estados Unidos
Materia
Submerged Moraines
Geophysics
Lake Fagano
Tierra del Fuego
Late Pleistocene
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:11336/12740
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/12740
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network_name_str CONICET Digital (CONICET)
spelling Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost PatagoniaWaldmann, NicolasAriztegui, DanielAnselmetti, Flavio S.Coronato, Andrea Maria JosefaAustin Jr., James A.Submerged MorainesGeophysicsLake FaganoTierra del FuegoLate Pleistocenehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1The Island of Tierra del Fuego, at the southernmost extreme of Patagonia, is located in one of the most extensively glaciated areas of the Southern Hemisphere outside Antarctica during the late Pleistocene. The Lago Fagnano region, at ∼54°30′S and ∼68°W, has experienced several phases of glacier growth and retreat since the Last Glacial Maximum (LGM). We illustrate these phases using combined geomorphological, geophysical and coring surveys in Lago Fagnano itself, a ∼105 km-long, E–W-oriented glacio-tectonic basin. We identify and map a complex set of submerged frontal, central and lateral moraines covered by lacustrine sediments using seismic stratigraphic analysis of multi-channel profiles imaging the sub-lake floor. We then combine these geophysical data with field observations and regional maps of similar structures around the lake to reconstruct the spatial behavior of the Fagnano paleo-glacier since the LGM. We interpret the preserved frontal moraines as having formed during at least 20 re-advance stages of the glacier within a long-term deglaciation interval post-LGM. Preliminary tephrochronological dating of a ∼7.5 m long core indicates a step-wise deglaciation pattern comprising a final glacier re-advance stage at ∼11.2 ka BP.Fil: Waldmann, Nicolas. Universidad de Ginebra; SuizaFil: Ariztegui, Daniel. Universidad de Ginebra; SuizaFil: Anselmetti, Flavio S.. Swiss Federal Institute of Aquatic Science and Technology. Department of Surface Waters; SuizaFil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; ArgentinaFil: Austin Jr., James A.. University of Texas at Austin; Estados UnidosElsevier2010-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/12740Waldmann, Nicolas; Ariztegui, Daniel; Anselmetti, Flavio S.; Coronato, Andrea Maria Josefa; Austin Jr., James A.; Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia; Elsevier; Quaternary Science Reviews; 29; 9-10; 5-2010; 1188-12000277-3791enginfo:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277379110000181info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2010.01.016info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2026-02-26T10:08:49Zoai:ri.conicet.gov.ar:11336/12740instacron: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:34982026-02-26 10:08:49.867CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
title Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
spellingShingle Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
Waldmann, Nicolas
Submerged Moraines
Geophysics
Lake Fagano
Tierra del Fuego
Late Pleistocene
title_short Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
title_full Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
title_fullStr Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
title_full_unstemmed Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
title_sort Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia
dc.creator.none.fl_str_mv Waldmann, Nicolas
Ariztegui, Daniel
Anselmetti, Flavio S.
Coronato, Andrea Maria Josefa
Austin Jr., James A.
author Waldmann, Nicolas
author_facet Waldmann, Nicolas
Ariztegui, Daniel
Anselmetti, Flavio S.
Coronato, Andrea Maria Josefa
Austin Jr., James A.
author_role author
author2 Ariztegui, Daniel
Anselmetti, Flavio S.
Coronato, Andrea Maria Josefa
Austin Jr., James A.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Submerged Moraines
Geophysics
Lake Fagano
Tierra del Fuego
Late Pleistocene
topic Submerged Moraines
Geophysics
Lake Fagano
Tierra del Fuego
Late Pleistocene
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 Island of Tierra del Fuego, at the southernmost extreme of Patagonia, is located in one of the most extensively glaciated areas of the Southern Hemisphere outside Antarctica during the late Pleistocene. The Lago Fagnano region, at ∼54°30′S and ∼68°W, has experienced several phases of glacier growth and retreat since the Last Glacial Maximum (LGM). We illustrate these phases using combined geomorphological, geophysical and coring surveys in Lago Fagnano itself, a ∼105 km-long, E–W-oriented glacio-tectonic basin. We identify and map a complex set of submerged frontal, central and lateral moraines covered by lacustrine sediments using seismic stratigraphic analysis of multi-channel profiles imaging the sub-lake floor. We then combine these geophysical data with field observations and regional maps of similar structures around the lake to reconstruct the spatial behavior of the Fagnano paleo-glacier since the LGM. We interpret the preserved frontal moraines as having formed during at least 20 re-advance stages of the glacier within a long-term deglaciation interval post-LGM. Preliminary tephrochronological dating of a ∼7.5 m long core indicates a step-wise deglaciation pattern comprising a final glacier re-advance stage at ∼11.2 ka BP.
Fil: Waldmann, Nicolas. Universidad de Ginebra; Suiza
Fil: Ariztegui, Daniel. Universidad de Ginebra; Suiza
Fil: Anselmetti, Flavio S.. Swiss Federal Institute of Aquatic Science and Technology. Department of Surface Waters; Suiza
Fil: Coronato, Andrea Maria Josefa. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
Fil: Austin Jr., James A.. University of Texas at Austin; Estados Unidos
description The Island of Tierra del Fuego, at the southernmost extreme of Patagonia, is located in one of the most extensively glaciated areas of the Southern Hemisphere outside Antarctica during the late Pleistocene. The Lago Fagnano region, at ∼54°30′S and ∼68°W, has experienced several phases of glacier growth and retreat since the Last Glacial Maximum (LGM). We illustrate these phases using combined geomorphological, geophysical and coring surveys in Lago Fagnano itself, a ∼105 km-long, E–W-oriented glacio-tectonic basin. We identify and map a complex set of submerged frontal, central and lateral moraines covered by lacustrine sediments using seismic stratigraphic analysis of multi-channel profiles imaging the sub-lake floor. We then combine these geophysical data with field observations and regional maps of similar structures around the lake to reconstruct the spatial behavior of the Fagnano paleo-glacier since the LGM. We interpret the preserved frontal moraines as having formed during at least 20 re-advance stages of the glacier within a long-term deglaciation interval post-LGM. Preliminary tephrochronological dating of a ∼7.5 m long core indicates a step-wise deglaciation pattern comprising a final glacier re-advance stage at ∼11.2 ka BP.
publishDate 2010
dc.date.none.fl_str_mv 2010-05
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/11336/12740
Waldmann, Nicolas; Ariztegui, Daniel; Anselmetti, Flavio S.; Coronato, Andrea Maria Josefa; Austin Jr., James A.; Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia; Elsevier; Quaternary Science Reviews; 29; 9-10; 5-2010; 1188-1200
0277-3791
url http://hdl.handle.net/11336/12740
identifier_str_mv Waldmann, Nicolas; Ariztegui, Daniel; Anselmetti, Flavio S.; Coronato, Andrea Maria Josefa; Austin Jr., James A.; Geophysical evidence of multiple glacier advances in Lago Fagnano (54°S), southernmost Patagonia; Elsevier; Quaternary Science Reviews; 29; 9-10; 5-2010; 1188-1200
0277-3791
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0277379110000181
info:eu-repo/semantics/altIdentifier/doi/10.1016/j.quascirev.2010.01.016
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 13.176822

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