A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications

Autores
Paredes, José M.; Foix, Nicolas; Guerstein, Gladys Raquel; Guler, Maria Veronica; Irigoyen, Martin; Moscoso, Pablo; Giordano, Sergio
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
A new Cenozoic dataset in the subsurface of the South Flank of the Golfo San Jorge Basin (Santa Cruz province) allowed to identify a non-previously recognized transgressive event of late Eocene to early Oligocene age. Below of a marine succession containing a dinoflagellate cyst assemblage that characterizes the C/G palynological zone of the Chenque Formation (early Miocene), a 80–110 m thick marine succession contains a palynological assemblage integrated by Gelatia inflata, Diphyes colligerum and Reticulatosphaera actinocoronata supporting the occurrence of a marine incursion in the basin during the Eocene–Oligocene transition (EOT). The new lithostratigraphic unit - here defined as El Huemul Formation – covers in sharp contact to the Sarmiento Formation, and become thinner from East to West; the unit has been identified in about 1800 well logs covering up to 3500 km2, and its subsurface distribution exceed the boundaries of the study area. The El Huemul Formation consists of a thin lag of glauconitic sandstones with fining-upward log motif, followed by a mudstone-dominated succession that coarsening-upward to sandstones, evidencing a full T-R cycle. Preservation of the El Huemul Formation in the subsurface of the South Flank has been favored by the reactivation of WNW-ESE late Cretaceous normal faults, and by the generation of N–S striking normal faults of Paleocene-Eocene age. Flexural loading associated to igneous intrusions of Paleocene?- middle Eocene age also promoted the increase of subsidence in the South Flank of the basin prior to the transgression.
Fil: Paredes, José M.. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Foix, Nicolas. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina
Fil: Guler, Maria Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina
Fil: Irigoyen, Martin. SINOPEC ARGENTINA, Exploration and Production, Inc.; Argentina
Fil: Moscoso, Pablo. SINOPEC ARGENTINA, Exploration and Production, Inc.; Argentina
Fil: Giordano, Sergio. SINOPEC ARGENTINA, Exploration and Production, Inc.; Argentina
Materia
EL HUEMUL FORMATION
PRE-PATAGONIENSE TRANSGRESSION.
LATE EOCENE TO EARLY OLIGOCENE DINOFLAGELLATE CYSTS
GOLFO SAN JORGE BASIN, PATAGONIA
Nivel de accesibilidad
acceso embargado
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:11336/6491
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/6491
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implicationsParedes, José M.Foix, NicolasGuerstein, Gladys RaquelGuler, Maria VeronicaIrigoyen, MartinMoscoso, PabloGiordano, SergioEL HUEMUL FORMATIONPRE-PATAGONIENSE TRANSGRESSION.LATE EOCENE TO EARLY OLIGOCENE DINOFLAGELLATE CYSTSGOLFO SAN JORGE BASIN, PATAGONIAhttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1A new Cenozoic dataset in the subsurface of the South Flank of the Golfo San Jorge Basin (Santa Cruz province) allowed to identify a non-previously recognized transgressive event of late Eocene to early Oligocene age. Below of a marine succession containing a dinoflagellate cyst assemblage that characterizes the C/G palynological zone of the Chenque Formation (early Miocene), a 80–110 m thick marine succession contains a palynological assemblage integrated by Gelatia inflata, Diphyes colligerum and Reticulatosphaera actinocoronata supporting the occurrence of a marine incursion in the basin during the Eocene–Oligocene transition (EOT). The new lithostratigraphic unit - here defined as El Huemul Formation – covers in sharp contact to the Sarmiento Formation, and become thinner from East to West; the unit has been identified in about 1800 well logs covering up to 3500 km2, and its subsurface distribution exceed the boundaries of the study area. The El Huemul Formation consists of a thin lag of glauconitic sandstones with fining-upward log motif, followed by a mudstone-dominated succession that coarsening-upward to sandstones, evidencing a full T-R cycle. Preservation of the El Huemul Formation in the subsurface of the South Flank has been favored by the reactivation of WNW-ESE late Cretaceous normal faults, and by the generation of N–S striking normal faults of Paleocene-Eocene age. Flexural loading associated to igneous intrusions of Paleocene?- middle Eocene age also promoted the increase of subsidence in the South Flank of the basin prior to the transgression.Fil: Paredes, José M.. Universidad Nacional de la Patagonia "San Juan Bosco"; ArgentinaFil: Foix, Nicolas. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; ArgentinaFil: Guler, Maria Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; ArgentinaFil: Irigoyen, Martin. SINOPEC ARGENTINA, Exploration and Production, Inc.; ArgentinaFil: Moscoso, Pablo. SINOPEC ARGENTINA, Exploration and Production, Inc.; ArgentinaFil: Giordano, Sergio. SINOPEC ARGENTINA, Exploration and Production, Inc.; ArgentinaElsevier2015-08-18info:eu-repo/date/embargoEnd/2017-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/6491Paredes, José M.; Foix, Nicolas; Guerstein, Gladys Raquel; Guler, Maria Veronica; Irigoyen, Martin; et al.; A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications; Elsevier; Journal of South American Earth Sciences; 63; 18-8-2015; 293-3090895-9811enginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2015.08.009info:eu-repo/semantics/altIdentifier/doi/info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300468info:eu-repo/semantics/embargoedAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:38:32Zoai:ri.conicet.gov.ar:11336/6491instacron: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 09:38:32.479CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
title A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
spellingShingle A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
Paredes, José M.
EL HUEMUL FORMATION
PRE-PATAGONIENSE TRANSGRESSION.
LATE EOCENE TO EARLY OLIGOCENE DINOFLAGELLATE CYSTS
GOLFO SAN JORGE BASIN, PATAGONIA
title_short A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
title_full A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
title_fullStr A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
title_full_unstemmed A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
title_sort A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications
dc.creator.none.fl_str_mv Paredes, José M.
Foix, Nicolas
Guerstein, Gladys Raquel
Guler, Maria Veronica
Irigoyen, Martin
Moscoso, Pablo
Giordano, Sergio
author Paredes, José M.
author_facet Paredes, José M.
Foix, Nicolas
Guerstein, Gladys Raquel
Guler, Maria Veronica
Irigoyen, Martin
Moscoso, Pablo
Giordano, Sergio
author_role author
author2 Foix, Nicolas
Guerstein, Gladys Raquel
Guler, Maria Veronica
Irigoyen, Martin
Moscoso, Pablo
Giordano, Sergio
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv EL HUEMUL FORMATION
PRE-PATAGONIENSE TRANSGRESSION.
LATE EOCENE TO EARLY OLIGOCENE DINOFLAGELLATE CYSTS
GOLFO SAN JORGE BASIN, PATAGONIA
topic EL HUEMUL FORMATION
PRE-PATAGONIENSE TRANSGRESSION.
LATE EOCENE TO EARLY OLIGOCENE DINOFLAGELLATE CYSTS
GOLFO SAN JORGE BASIN, PATAGONIA
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 new Cenozoic dataset in the subsurface of the South Flank of the Golfo San Jorge Basin (Santa Cruz province) allowed to identify a non-previously recognized transgressive event of late Eocene to early Oligocene age. Below of a marine succession containing a dinoflagellate cyst assemblage that characterizes the C/G palynological zone of the Chenque Formation (early Miocene), a 80–110 m thick marine succession contains a palynological assemblage integrated by Gelatia inflata, Diphyes colligerum and Reticulatosphaera actinocoronata supporting the occurrence of a marine incursion in the basin during the Eocene–Oligocene transition (EOT). The new lithostratigraphic unit - here defined as El Huemul Formation – covers in sharp contact to the Sarmiento Formation, and become thinner from East to West; the unit has been identified in about 1800 well logs covering up to 3500 km2, and its subsurface distribution exceed the boundaries of the study area. The El Huemul Formation consists of a thin lag of glauconitic sandstones with fining-upward log motif, followed by a mudstone-dominated succession that coarsening-upward to sandstones, evidencing a full T-R cycle. Preservation of the El Huemul Formation in the subsurface of the South Flank has been favored by the reactivation of WNW-ESE late Cretaceous normal faults, and by the generation of N–S striking normal faults of Paleocene-Eocene age. Flexural loading associated to igneous intrusions of Paleocene?- middle Eocene age also promoted the increase of subsidence in the South Flank of the basin prior to the transgression.
Fil: Paredes, José M.. Universidad Nacional de la Patagonia "San Juan Bosco"; Argentina
Fil: Foix, Nicolas. Universidad Nacional de la Patagonia "San Juan Bosco". Facultad de Ciencias Naturales - Sede Comodoro; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Guerstein, Gladys Raquel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina
Fil: Guler, Maria Veronica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Bahía Blanca. Instituto Geológico del Sur; Argentina. Universidad Nacional del Sur; Argentina
Fil: Irigoyen, Martin. SINOPEC ARGENTINA, Exploration and Production, Inc.; Argentina
Fil: Moscoso, Pablo. SINOPEC ARGENTINA, Exploration and Production, Inc.; Argentina
Fil: Giordano, Sergio. SINOPEC ARGENTINA, Exploration and Production, Inc.; Argentina
description A new Cenozoic dataset in the subsurface of the South Flank of the Golfo San Jorge Basin (Santa Cruz province) allowed to identify a non-previously recognized transgressive event of late Eocene to early Oligocene age. Below of a marine succession containing a dinoflagellate cyst assemblage that characterizes the C/G palynological zone of the Chenque Formation (early Miocene), a 80–110 m thick marine succession contains a palynological assemblage integrated by Gelatia inflata, Diphyes colligerum and Reticulatosphaera actinocoronata supporting the occurrence of a marine incursion in the basin during the Eocene–Oligocene transition (EOT). The new lithostratigraphic unit - here defined as El Huemul Formation – covers in sharp contact to the Sarmiento Formation, and become thinner from East to West; the unit has been identified in about 1800 well logs covering up to 3500 km2, and its subsurface distribution exceed the boundaries of the study area. The El Huemul Formation consists of a thin lag of glauconitic sandstones with fining-upward log motif, followed by a mudstone-dominated succession that coarsening-upward to sandstones, evidencing a full T-R cycle. Preservation of the El Huemul Formation in the subsurface of the South Flank has been favored by the reactivation of WNW-ESE late Cretaceous normal faults, and by the generation of N–S striking normal faults of Paleocene-Eocene age. Flexural loading associated to igneous intrusions of Paleocene?- middle Eocene age also promoted the increase of subsidence in the South Flank of the basin prior to the transgression.
publishDate 2015
dc.date.none.fl_str_mv 2015-08-18
info:eu-repo/date/embargoEnd/2017-09-01
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 http://hdl.handle.net/11336/6491
Paredes, José M.; Foix, Nicolas; Guerstein, Gladys Raquel; Guler, Maria Veronica; Irigoyen, Martin; et al.; A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications; Elsevier; Journal of South American Earth Sciences; 63; 18-8-2015; 293-309
0895-9811
url http://hdl.handle.net/11336/6491
identifier_str_mv Paredes, José M.; Foix, Nicolas; Guerstein, Gladys Raquel; Guler, Maria Veronica; Irigoyen, Martin; et al.; A late Eocene-early Oligocene transgressive event in the Golfo San Jorge basin: palynological results and stratigraphic implications; Elsevier; Journal of South American Earth Sciences; 63; 18-8-2015; 293-309
0895-9811
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.jsames.2015.08.009
info:eu-repo/semantics/altIdentifier/doi/
info:eu-repo/semantics/altIdentifier/url/http://www.sciencedirect.com/science/article/pii/S0895981115300468
dc.rights.none.fl_str_mv info:eu-repo/semantics/embargoedAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv embargoedAccess
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 13.070432

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