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
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/173599
Ver los metadatos del registro completo
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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 Técnicas2025-09-29T09:57:48Zoai: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:34982025-09-29 09:57:48.836CONICET 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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1844613726787862528 |
score |
13.070432 |