Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)

Autores
Paredes, José; Allard, José; Olazábal, Sabrina; Foix, Nicolás; Valle, Mauro; Tunik, Maisa
Año de publicación
2024
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fil: Paredes, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.
Fil: Allard, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.
Fil: Olazábal, Sabrina. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.
Fil: Foix, Nicolás. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.
Fil: Valle, Mauro. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.
Fil: Tunik, Maisa. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Instituto de Investigación en Paleobiología y Geología and Universidad Nacional de Río Negro. Argentina.
The size, shape, and organization of depositional systems in endorheic basins are controlled by the tectonic and climatic history of the sedimentary basin and its boundaries. We evaluate the changes in the alluvial architecture of the Matasiete (Aptian) and Castillo (Albian) formations of the Chubut Group (Cretaceous) in the endorheic Golfo San Jorge Basin (Patagonia, Argentina) analyzing a ∼150 km transect along the San Bernardo Fold Belt, subsurface data, and coeval fluvial successions of the Los Adobes Formation in the nearby Cañadón Asfalto Basin. The Aptian Matasiete Formation represents an externally-sourced, high-accommodation fluvial system with its headwaters in the current Cañadón Asfalto Basin, flowing toward the alkaline lake of the Pozo D-129 Formation through N–S oriented sedimentary corridors of tectonic origin. Low sinuosity, fixed channels with ribbon geometries (mean thickness 7.3 m, W/T ratio 14) are encased in red-colored floodplain fines, whereas stratigraphic intervals rich in resedimented tuffs contain braided rivers with W/T ratio up to 90. Deposition of the overlying Albian Castillo Formation occurred in a W-E elongated basin disconnected from the Cañadón Asfalto Basin, comprising aggradational, volcaniclastic floodplain deposits and smaller-scale fluvial channels of narrow-sheet geometries (mean thickness ∼ 3m, mean W/T ratio 45). The Castillo Formation shows spatial variation in fluvial styles and channel sizes, with intermittent to ephemeral rivers of small scale near the headwaters and seasonal, perennial rivers in downstream positions. Alluvial architecture changes between the Matasiete and Castillo formations reflect changes in the configuration of the basin boundaries, subsequent re-organization of the channel networks, and variable supply of volcaniclastic particles to drainage catchments of different hierarchy that evolved in areas with large variation of the preserved thickness. Comparable geomorphic scenarios in the Okavango Macrobasin show multiple base levels (lacustrine, ephemeral pans), several drainage catchments of variable orientation, scale, and behavior (perennial, intermittent to ephemeral), and exotic rivers adjacent to minorscale courses.
The size, shape, and organization of depositional systems in endorheic basins are controlled by the tectonic and climatic history of the sedimentary basin and its boundaries. We evaluate the changes in the alluvial architecture of the Matasiete (Aptian) and Castillo (Albian) formations of the Chubut Group (Cretaceous) in the endorheic Golfo San Jorge Basin (Patagonia, Argentina) analyzing a ∼150 km transect along the San Bernardo Fold Belt, subsurface data, and coeval fluvial successions of the Los Adobes Formation in the nearby Cañadón Asfalto Basin. The Aptian Matasiete Formation represents an externally-sourced, high-accommodation fluvial system with its headwaters in the current Cañadón Asfalto Basin, flowing toward the alkaline lake of the Pozo D-129 Formation through N–S oriented sedimentary corridors of tectonic origin. Low sinuosity, fixed channels with ribbon geometries (mean thickness 7.3 m, W/T ratio 14) are encased in red-colored floodplain fines, whereas stratigraphic intervals rich in resedimented tuffs contain braided rivers with W/T ratio up to 90. Deposition of the overlying Albian Castillo Formation occurred in a W-E elongated basin disconnected from the Cañadón Asfalto Basin, comprising aggradational, volcaniclastic floodplain deposits and smaller-scale fluvial channels of narrow-sheet geometries (mean thickness ∼ 3m, mean W/T ratio 45). The Castillo Formation shows spatial variation in fluvial styles and channel sizes, with intermittent to ephemeral rivers of small scale near the headwaters and seasonal, perennial rivers in downstream positions. Alluvial architecture changes between the Matasiete and Castillo formations reflect changes in the configuration of the basin boundaries, subsequent re-organization of the channel networks, and variable supply of volcaniclastic particles to drainage catchments of different hierarchy that evolved in areas with large variation of the preserved thickness. Comparable geomorphic scenarios in the Okavango Macrobasin show multiple base levels (lacustrine, ephemeral pans), several drainage catchments of variable orientation, scale, and behavior (perennial, intermittent to ephemeral), and exotic rivers adjacent to minorscale courses.
Materia
Ciencias Exactas y Naturales
Endorheic basins
Fluvial systems
Alluvial architecture
Paleogeographic changes
Ciencias Exactas y Naturales
Nivel de accesibilidad
acceso embargado
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
RID-UNRN (UNRN)
Institución
Universidad Nacional de Río Negro
OAI Identificador
oai:rid.unrn.edu.ar:20.500.12049/13521

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oai_identifier_str oai:rid.unrn.edu.ar:20.500.12049/13521
network_acronym_str RIDUNRN
repository_id_str 4369
network_name_str RID-UNRN (UNRN)
spelling Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)Paredes, JoséAllard, JoséOlazábal, SabrinaFoix, NicolásValle, MauroTunik, MaisaCiencias Exactas y NaturalesEndorheic basinsFluvial systemsAlluvial architecturePaleogeographic changesCiencias Exactas y NaturalesFil: Paredes, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.Fil: Allard, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.Fil: Olazábal, Sabrina. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.Fil: Foix, Nicolás. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.Fil: Valle, Mauro. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.Fil: Tunik, Maisa. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Instituto de Investigación en Paleobiología y Geología and Universidad Nacional de Río Negro. Argentina.The size, shape, and organization of depositional systems in endorheic basins are controlled by the tectonic and climatic history of the sedimentary basin and its boundaries. We evaluate the changes in the alluvial architecture of the Matasiete (Aptian) and Castillo (Albian) formations of the Chubut Group (Cretaceous) in the endorheic Golfo San Jorge Basin (Patagonia, Argentina) analyzing a ∼150 km transect along the San Bernardo Fold Belt, subsurface data, and coeval fluvial successions of the Los Adobes Formation in the nearby Cañadón Asfalto Basin. The Aptian Matasiete Formation represents an externally-sourced, high-accommodation fluvial system with its headwaters in the current Cañadón Asfalto Basin, flowing toward the alkaline lake of the Pozo D-129 Formation through N–S oriented sedimentary corridors of tectonic origin. Low sinuosity, fixed channels with ribbon geometries (mean thickness 7.3 m, W/T ratio 14) are encased in red-colored floodplain fines, whereas stratigraphic intervals rich in resedimented tuffs contain braided rivers with W/T ratio up to 90. Deposition of the overlying Albian Castillo Formation occurred in a W-E elongated basin disconnected from the Cañadón Asfalto Basin, comprising aggradational, volcaniclastic floodplain deposits and smaller-scale fluvial channels of narrow-sheet geometries (mean thickness ∼ 3m, mean W/T ratio 45). The Castillo Formation shows spatial variation in fluvial styles and channel sizes, with intermittent to ephemeral rivers of small scale near the headwaters and seasonal, perennial rivers in downstream positions. Alluvial architecture changes between the Matasiete and Castillo formations reflect changes in the configuration of the basin boundaries, subsequent re-organization of the channel networks, and variable supply of volcaniclastic particles to drainage catchments of different hierarchy that evolved in areas with large variation of the preserved thickness. Comparable geomorphic scenarios in the Okavango Macrobasin show multiple base levels (lacustrine, ephemeral pans), several drainage catchments of variable orientation, scale, and behavior (perennial, intermittent to ephemeral), and exotic rivers adjacent to minorscale courses.The size, shape, and organization of depositional systems in endorheic basins are controlled by the tectonic and climatic history of the sedimentary basin and its boundaries. We evaluate the changes in the alluvial architecture of the Matasiete (Aptian) and Castillo (Albian) formations of the Chubut Group (Cretaceous) in the endorheic Golfo San Jorge Basin (Patagonia, Argentina) analyzing a ∼150 km transect along the San Bernardo Fold Belt, subsurface data, and coeval fluvial successions of the Los Adobes Formation in the nearby Cañadón Asfalto Basin. The Aptian Matasiete Formation represents an externally-sourced, high-accommodation fluvial system with its headwaters in the current Cañadón Asfalto Basin, flowing toward the alkaline lake of the Pozo D-129 Formation through N–S oriented sedimentary corridors of tectonic origin. Low sinuosity, fixed channels with ribbon geometries (mean thickness 7.3 m, W/T ratio 14) are encased in red-colored floodplain fines, whereas stratigraphic intervals rich in resedimented tuffs contain braided rivers with W/T ratio up to 90. Deposition of the overlying Albian Castillo Formation occurred in a W-E elongated basin disconnected from the Cañadón Asfalto Basin, comprising aggradational, volcaniclastic floodplain deposits and smaller-scale fluvial channels of narrow-sheet geometries (mean thickness ∼ 3m, mean W/T ratio 45). The Castillo Formation shows spatial variation in fluvial styles and channel sizes, with intermittent to ephemeral rivers of small scale near the headwaters and seasonal, perennial rivers in downstream positions. Alluvial architecture changes between the Matasiete and Castillo formations reflect changes in the configuration of the basin boundaries, subsequent re-organization of the channel networks, and variable supply of volcaniclastic particles to drainage catchments of different hierarchy that evolved in areas with large variation of the preserved thickness. Comparable geomorphic scenarios in the Okavango Macrobasin show multiple base levels (lacustrine, ephemeral pans), several drainage catchments of variable orientation, scale, and behavior (perennial, intermittent to ephemeral), and exotic rivers adjacent to minorscale courses.ElSevierinfo:eu-repo/date/embargoEnd/2027-01-012024-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfParedes, J., Allard, J.O., Olazábal, S.X., Foix, N., Valle, M., y Tunik, M. 2024. Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina). Journal of South American Earth Sciences. 144(1):105031.1873-0647http://rid.unrn.edu.ar/handle/20.500.12049/13521https://doi.org/10.1016/j.jsames.2024.105031enghttps://www.sciencedirect.com/journal/journal-of-south-american-earth-sciences144Journal of South American Earth Sciencesinfo:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-sa/4.0/reponame:RID-UNRN (UNRN)instname:Universidad Nacional de Río Negro2025-09-29T14:29:07Zoai:rid.unrn.edu.ar:20.500.12049/13521instacron:UNRNInstitucionalhttps://rid.unrn.edu.ar/jspui/Universidad públicaNo correspondehttps://rid.unrn.edu.ar/oai/snrdrid@unrn.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:43692025-09-29 14:29:07.909RID-UNRN (UNRN) - Universidad Nacional de Río Negrofalse
dc.title.none.fl_str_mv Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
title Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
spellingShingle Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
Paredes, José
Ciencias Exactas y Naturales
Endorheic basins
Fluvial systems
Alluvial architecture
Paleogeographic changes
Ciencias Exactas y Naturales
title_short Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
title_full Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
title_fullStr Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
title_full_unstemmed Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
title_sort Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina)
dc.creator.none.fl_str_mv Paredes, José
Allard, José
Olazábal, Sabrina
Foix, Nicolás
Valle, Mauro
Tunik, Maisa
author Paredes, José
author_facet Paredes, José
Allard, José
Olazábal, Sabrina
Foix, Nicolás
Valle, Mauro
Tunik, Maisa
author_role author
author2 Allard, José
Olazábal, Sabrina
Foix, Nicolás
Valle, Mauro
Tunik, Maisa
author2_role author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas y Naturales
Endorheic basins
Fluvial systems
Alluvial architecture
Paleogeographic changes
Ciencias Exactas y Naturales
topic Ciencias Exactas y Naturales
Endorheic basins
Fluvial systems
Alluvial architecture
Paleogeographic changes
Ciencias Exactas y Naturales
dc.description.none.fl_txt_mv Fil: Paredes, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.
Fil: Allard, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.
Fil: Olazábal, Sabrina. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.
Fil: Foix, Nicolás. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.
Fil: Valle, Mauro. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Argentina.
Fil: Tunik, Maisa. CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Instituto de Investigación en Paleobiología y Geología and Universidad Nacional de Río Negro. Argentina.
The size, shape, and organization of depositional systems in endorheic basins are controlled by the tectonic and climatic history of the sedimentary basin and its boundaries. We evaluate the changes in the alluvial architecture of the Matasiete (Aptian) and Castillo (Albian) formations of the Chubut Group (Cretaceous) in the endorheic Golfo San Jorge Basin (Patagonia, Argentina) analyzing a ∼150 km transect along the San Bernardo Fold Belt, subsurface data, and coeval fluvial successions of the Los Adobes Formation in the nearby Cañadón Asfalto Basin. The Aptian Matasiete Formation represents an externally-sourced, high-accommodation fluvial system with its headwaters in the current Cañadón Asfalto Basin, flowing toward the alkaline lake of the Pozo D-129 Formation through N–S oriented sedimentary corridors of tectonic origin. Low sinuosity, fixed channels with ribbon geometries (mean thickness 7.3 m, W/T ratio 14) are encased in red-colored floodplain fines, whereas stratigraphic intervals rich in resedimented tuffs contain braided rivers with W/T ratio up to 90. Deposition of the overlying Albian Castillo Formation occurred in a W-E elongated basin disconnected from the Cañadón Asfalto Basin, comprising aggradational, volcaniclastic floodplain deposits and smaller-scale fluvial channels of narrow-sheet geometries (mean thickness ∼ 3m, mean W/T ratio 45). The Castillo Formation shows spatial variation in fluvial styles and channel sizes, with intermittent to ephemeral rivers of small scale near the headwaters and seasonal, perennial rivers in downstream positions. Alluvial architecture changes between the Matasiete and Castillo formations reflect changes in the configuration of the basin boundaries, subsequent re-organization of the channel networks, and variable supply of volcaniclastic particles to drainage catchments of different hierarchy that evolved in areas with large variation of the preserved thickness. Comparable geomorphic scenarios in the Okavango Macrobasin show multiple base levels (lacustrine, ephemeral pans), several drainage catchments of variable orientation, scale, and behavior (perennial, intermittent to ephemeral), and exotic rivers adjacent to minorscale courses.
The size, shape, and organization of depositional systems in endorheic basins are controlled by the tectonic and climatic history of the sedimentary basin and its boundaries. We evaluate the changes in the alluvial architecture of the Matasiete (Aptian) and Castillo (Albian) formations of the Chubut Group (Cretaceous) in the endorheic Golfo San Jorge Basin (Patagonia, Argentina) analyzing a ∼150 km transect along the San Bernardo Fold Belt, subsurface data, and coeval fluvial successions of the Los Adobes Formation in the nearby Cañadón Asfalto Basin. The Aptian Matasiete Formation represents an externally-sourced, high-accommodation fluvial system with its headwaters in the current Cañadón Asfalto Basin, flowing toward the alkaline lake of the Pozo D-129 Formation through N–S oriented sedimentary corridors of tectonic origin. Low sinuosity, fixed channels with ribbon geometries (mean thickness 7.3 m, W/T ratio 14) are encased in red-colored floodplain fines, whereas stratigraphic intervals rich in resedimented tuffs contain braided rivers with W/T ratio up to 90. Deposition of the overlying Albian Castillo Formation occurred in a W-E elongated basin disconnected from the Cañadón Asfalto Basin, comprising aggradational, volcaniclastic floodplain deposits and smaller-scale fluvial channels of narrow-sheet geometries (mean thickness ∼ 3m, mean W/T ratio 45). The Castillo Formation shows spatial variation in fluvial styles and channel sizes, with intermittent to ephemeral rivers of small scale near the headwaters and seasonal, perennial rivers in downstream positions. Alluvial architecture changes between the Matasiete and Castillo formations reflect changes in the configuration of the basin boundaries, subsequent re-organization of the channel networks, and variable supply of volcaniclastic particles to drainage catchments of different hierarchy that evolved in areas with large variation of the preserved thickness. Comparable geomorphic scenarios in the Okavango Macrobasin show multiple base levels (lacustrine, ephemeral pans), several drainage catchments of variable orientation, scale, and behavior (perennial, intermittent to ephemeral), and exotic rivers adjacent to minorscale courses.
description Fil: Paredes, José. Geology Department, FCNyCS, Universidad Nacional de la Patagonia “San Juan Bosco”. Argentina.
publishDate 2024
dc.date.none.fl_str_mv 2024-07
info:eu-repo/date/embargoEnd/2027-01-01
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 Paredes, J., Allard, J.O., Olazábal, S.X., Foix, N., Valle, M., y Tunik, M. 2024. Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina). Journal of South American Earth Sciences. 144(1):105031.
1873-0647
http://rid.unrn.edu.ar/handle/20.500.12049/13521
https://doi.org/10.1016/j.jsames.2024.105031
identifier_str_mv Paredes, J., Allard, J.O., Olazábal, S.X., Foix, N., Valle, M., y Tunik, M. 2024. Drainage reorganization and alluvial architecture of endorheic basins: The Lower Cretaceous record of the Chubut Group in the Golfo San Jorge Basin (Patagonia, Argentina). Journal of South American Earth Sciences. 144(1):105031.
1873-0647
url http://rid.unrn.edu.ar/handle/20.500.12049/13521
https://doi.org/10.1016/j.jsames.2024.105031
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://www.sciencedirect.com/journal/journal-of-south-american-earth-sciences
144
Journal of South American Earth Sciences
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dc.publisher.none.fl_str_mv ElSevier
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