Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis

Autores
Fosdick, Julie C.; VanderLeest, R. A.; Bostelmann, J. E.; Leonard, J. S.; Ugalde, R.; Oyarzún, J. L.; Griffin, Miguel
Año de publicación
2020
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
New detrital zircon U-Pb geochronology data from the Cenozoic Magallanes-Austral Basin in Argentina and Chile ~51° S establish a revised chronostratigraphy of Paleocene-Miocene foreland synorogenic strata and document the rise and subsequent isolation of hinterland sources in the Patagonian Andes from the continental margin. The upsection loss of zircons derived from the hinterland Paleozoic and Late Jurassic sources between ca. 60 and 44Ma documents a major shift in sediment routing due to Paleogene orogenesis in the greater Patagonian-Fuegian Andes. Changes in the proportion of grains from hinterland thrust sheets, comprised of Jurassic volcanics and Paleozoic metasedimentary rocks, provide a trackable signal of long-term shifts in orogenic drainage divide and topographic isolation due to widening of the retroarc fold-thrust belt. The youngest detrital zircon U-Pb ages confirm timing of Maastrichtian-Eocene strata but require substantial age revisions for part of the overlying Cenozoic basinfill during the late Eocene and Oligocene. The upper Río Turbio Formation, previously mapped as middle to late Eocene in the published literature, records a newly recognized latest Eocene-Oligocene (37-27Ma) marine incursion along the basin margin. We suggest that these deposits could be genetically linked to the distally placed units along the Atlantic coast, including the El Huemul Formation and the younger San Julián Formation, via an eastward deepening within the foreland basin system that culminated in a basin-wide Oligocene marine incursion in the Southern Andes. The overlying Río Guillermo Formation records onset of tectonically generated coarse-grained detritus ca. 24.3Ma and a transition to the first fully nonmarine conditions on the proximal Patagonian platform since Late Cretaceous time, perhaps signaling a Cordilleran-scale upper plate response to increased plate convergence and tectonic plate reorganization.
Fil: Fosdick, Julie C.. University of Connecticut; Estados Unidos
Fil: VanderLeest, R. A.. University of Connecticut; Estados Unidos
Fil: Bostelmann, J. E.. Universidad de Chile; Chile
Fil: Leonard, J. S.. Arizona State University; Estados Unidos
Fil: Ugalde, R.. Universidad Mayor; Chile
Fil: Oyarzún, J. L.. Parque Geo-paleontológico la Cumbre-baguales; Chile
Fil: Griffin, Miguel. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleozoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
Materia
Cenozoic Magallanes-Austral Basin
U-Pb geochronology
Río Turbio Formation
Timing of Cenozoic Atlantic Incursions
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/173599
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/173599
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesisFosdick, Julie C.VanderLeest, R. A.Bostelmann, J. E.Leonard, J. S.Ugalde, R.Oyarzún, J. L.Griffin, MiguelCenozoic Magallanes-Austral BasinU-Pb geochronologyRío Turbio FormationTiming of Cenozoic Atlantic Incursionshttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1New detrital zircon U-Pb geochronology data from the Cenozoic Magallanes-Austral Basin in Argentina and Chile ~51° S establish a revised chronostratigraphy of Paleocene-Miocene foreland synorogenic strata and document the rise and subsequent isolation of hinterland sources in the Patagonian Andes from the continental margin. The upsection loss of zircons derived from the hinterland Paleozoic and Late Jurassic sources between ca. 60 and 44Ma documents a major shift in sediment routing due to Paleogene orogenesis in the greater Patagonian-Fuegian Andes. Changes in the proportion of grains from hinterland thrust sheets, comprised of Jurassic volcanics and Paleozoic metasedimentary rocks, provide a trackable signal of long-term shifts in orogenic drainage divide and topographic isolation due to widening of the retroarc fold-thrust belt. The youngest detrital zircon U-Pb ages confirm timing of Maastrichtian-Eocene strata but require substantial age revisions for part of the overlying Cenozoic basinfill during the late Eocene and Oligocene. The upper Río Turbio Formation, previously mapped as middle to late Eocene in the published literature, records a newly recognized latest Eocene-Oligocene (37-27Ma) marine incursion along the basin margin. We suggest that these deposits could be genetically linked to the distally placed units along the Atlantic coast, including the El Huemul Formation and the younger San Julián Formation, via an eastward deepening within the foreland basin system that culminated in a basin-wide Oligocene marine incursion in the Southern Andes. The overlying Río Guillermo Formation records onset of tectonically generated coarse-grained detritus ca. 24.3Ma and a transition to the first fully nonmarine conditions on the proximal Patagonian platform since Late Cretaceous time, perhaps signaling a Cordilleran-scale upper plate response to increased plate convergence and tectonic plate reorganization.Fil: Fosdick, Julie C.. University of Connecticut; Estados UnidosFil: VanderLeest, R. A.. University of Connecticut; Estados UnidosFil: Bostelmann, J. E.. Universidad de Chile; ChileFil: Leonard, J. S.. Arizona State University; Estados UnidosFil: Ugalde, R.. Universidad Mayor; ChileFil: Oyarzún, J. L.. Parque Geo-paleontológico la Cumbre-baguales; ChileFil: Griffin, Miguel. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleozoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; ArgentinaGeoscienceworld2020-09info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/173599Fosdick, Julie C.; VanderLeest, R. A.; Bostelmann, J. E.; Leonard, J. S.; Ugalde, R.; et al.; Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis; Geoscienceworld; Lithosphere; 2020; 1; 9-2020; 1-181941-82641947-4253CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.2113/2020/8883099info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/lithosphere/article/2020/1/8883099/590463/Revised-Timing-of-Cenozoic-Atlantic-Incursions-andinfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:27:04Zoai:ri.conicet.gov.ar:11336/173599instacron: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 11:27:05.144CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
title Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
spellingShingle Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
Fosdick, Julie C.
Cenozoic Magallanes-Austral Basin
U-Pb geochronology
Río Turbio Formation
Timing of Cenozoic Atlantic Incursions
title_short Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
title_full Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
title_fullStr Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
title_full_unstemmed Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
title_sort Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis
dc.creator.none.fl_str_mv Fosdick, Julie C.
VanderLeest, R. A.
Bostelmann, J. E.
Leonard, J. S.
Ugalde, R.
Oyarzún, J. L.
Griffin, Miguel
author Fosdick, Julie C.
author_facet Fosdick, Julie C.
VanderLeest, R. A.
Bostelmann, J. E.
Leonard, J. S.
Ugalde, R.
Oyarzún, J. L.
Griffin, Miguel
author_role author
author2 VanderLeest, R. A.
Bostelmann, J. E.
Leonard, J. S.
Ugalde, R.
Oyarzún, J. L.
Griffin, Miguel
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Cenozoic Magallanes-Austral Basin
U-Pb geochronology
Río Turbio Formation
Timing of Cenozoic Atlantic Incursions
topic Cenozoic Magallanes-Austral Basin
U-Pb geochronology
Río Turbio Formation
Timing of Cenozoic Atlantic Incursions
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv New detrital zircon U-Pb geochronology data from the Cenozoic Magallanes-Austral Basin in Argentina and Chile ~51° S establish a revised chronostratigraphy of Paleocene-Miocene foreland synorogenic strata and document the rise and subsequent isolation of hinterland sources in the Patagonian Andes from the continental margin. The upsection loss of zircons derived from the hinterland Paleozoic and Late Jurassic sources between ca. 60 and 44Ma documents a major shift in sediment routing due to Paleogene orogenesis in the greater Patagonian-Fuegian Andes. Changes in the proportion of grains from hinterland thrust sheets, comprised of Jurassic volcanics and Paleozoic metasedimentary rocks, provide a trackable signal of long-term shifts in orogenic drainage divide and topographic isolation due to widening of the retroarc fold-thrust belt. The youngest detrital zircon U-Pb ages confirm timing of Maastrichtian-Eocene strata but require substantial age revisions for part of the overlying Cenozoic basinfill during the late Eocene and Oligocene. The upper Río Turbio Formation, previously mapped as middle to late Eocene in the published literature, records a newly recognized latest Eocene-Oligocene (37-27Ma) marine incursion along the basin margin. We suggest that these deposits could be genetically linked to the distally placed units along the Atlantic coast, including the El Huemul Formation and the younger San Julián Formation, via an eastward deepening within the foreland basin system that culminated in a basin-wide Oligocene marine incursion in the Southern Andes. The overlying Río Guillermo Formation records onset of tectonically generated coarse-grained detritus ca. 24.3Ma and a transition to the first fully nonmarine conditions on the proximal Patagonian platform since Late Cretaceous time, perhaps signaling a Cordilleran-scale upper plate response to increased plate convergence and tectonic plate reorganization.
Fil: Fosdick, Julie C.. University of Connecticut; Estados Unidos
Fil: VanderLeest, R. A.. University of Connecticut; Estados Unidos
Fil: Bostelmann, J. E.. Universidad de Chile; Chile
Fil: Leonard, J. S.. Arizona State University; Estados Unidos
Fil: Ugalde, R.. Universidad Mayor; Chile
Fil: Oyarzún, J. L.. Parque Geo-paleontológico la Cumbre-baguales; Chile
Fil: Griffin, Miguel. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleozoología Invertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
description New detrital zircon U-Pb geochronology data from the Cenozoic Magallanes-Austral Basin in Argentina and Chile ~51° S establish a revised chronostratigraphy of Paleocene-Miocene foreland synorogenic strata and document the rise and subsequent isolation of hinterland sources in the Patagonian Andes from the continental margin. The upsection loss of zircons derived from the hinterland Paleozoic and Late Jurassic sources between ca. 60 and 44Ma documents a major shift in sediment routing due to Paleogene orogenesis in the greater Patagonian-Fuegian Andes. Changes in the proportion of grains from hinterland thrust sheets, comprised of Jurassic volcanics and Paleozoic metasedimentary rocks, provide a trackable signal of long-term shifts in orogenic drainage divide and topographic isolation due to widening of the retroarc fold-thrust belt. The youngest detrital zircon U-Pb ages confirm timing of Maastrichtian-Eocene strata but require substantial age revisions for part of the overlying Cenozoic basinfill during the late Eocene and Oligocene. The upper Río Turbio Formation, previously mapped as middle to late Eocene in the published literature, records a newly recognized latest Eocene-Oligocene (37-27Ma) marine incursion along the basin margin. We suggest that these deposits could be genetically linked to the distally placed units along the Atlantic coast, including the El Huemul Formation and the younger San Julián Formation, via an eastward deepening within the foreland basin system that culminated in a basin-wide Oligocene marine incursion in the Southern Andes. The overlying Río Guillermo Formation records onset of tectonically generated coarse-grained detritus ca. 24.3Ma and a transition to the first fully nonmarine conditions on the proximal Patagonian platform since Late Cretaceous time, perhaps signaling a Cordilleran-scale upper plate response to increased plate convergence and tectonic plate reorganization.
publishDate 2020
dc.date.none.fl_str_mv 2020-09
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/11336/173599
Fosdick, Julie C.; VanderLeest, R. A.; Bostelmann, J. E.; Leonard, J. S.; Ugalde, R.; et al.; Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis; Geoscienceworld; Lithosphere; 2020; 1; 9-2020; 1-18
1941-8264
1947-4253
CONICET Digital
CONICET
url http://hdl.handle.net/11336/173599
identifier_str_mv Fosdick, Julie C.; VanderLeest, R. A.; Bostelmann, J. E.; Leonard, J. S.; Ugalde, R.; et al.; Revised timing of cenozoic atlantic incursions and changing hinterland sediment sources during southern patagonian orogenesis; Geoscienceworld; Lithosphere; 2020; 1; 9-2020; 1-18
1941-8264
1947-4253
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.2113/2020/8883099
info:eu-repo/semantics/altIdentifier/url/https://pubs.geoscienceworld.org/gsa/lithosphere/article/2020/1/8883099/590463/Revised-Timing-of-Cenozoic-Atlantic-Incursions-and
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Geoscienceworld
publisher.none.fl_str_mv Geoscienceworld
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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