Geometry, Lithofacies, and Spatial Distribution of Cretaceous Fluvial Sandstone Bodies, San Jorge Basin, Argentina: Outcrop Analog for the Hydrocarbon-Bearing Chubut Group

Bridge, J.; Jalfin, Guillermo A.; Georgieff, Sergio Miguel

doi:10.1306/2dc40915-0e47-11d7-8643000102c1865d

Cited by 149 publications

(63 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The youngest Albian nonmarine deposits in the study area belong to the Castillo Formation (Panza et al, ; Figures c and d). Up to now, the oldest age obtained in this unit was 104 Ma (U/Pb; Bridge et al, ; Suárez, Márquez et al, ). However, the regional extent of these rocks and stratigraphic significance should be further explored in future studies.…”

Section: Discussionmentioning

confidence: 83%

Cretaceous Intraplate Contraction in Southern Patagonia: A Far‐Field Response to Changing Subduction Dynamics?

et al. 2018

View full text Add to dashboard Cite

The origin, extent, and timing of intraplate contraction in Patagonia are among the least understood geological processes of southern South America. Particularly, the intraplate Deseado fold‐thrust belt (FTB), located in the Patagonian broken foreland (47°–48°30′S), is one of the most enigmatic areas. In this belt, time constraints on tectonic events are limited and synorogenic deposits have not been documented so far. Furthermore, the driving mechanism for intraplate contraction remains unknown. In this study, we carried out a structural and sedimentological analysis. We report the first syntectonic deposits in this area in the Baqueró (Aptian) and Chubut (Cenomanian/Campanian) groups and a newly found unit referred to as the Albian beds (109.9 ± 1.5 Ma). Thus, several contractional stages in late Aptian, Albian, and Cenomanian‐Campanian are then inferred. We suggest that the Deseado FTB constituted the southernmost expression of the early Patagonian broken foreland in Cretaceous times. Additionally, we analyzed the spatiotemporal magmatic arc behavior as a proxy of dynamic changes in the Andean subduction during determined stages of intraplate contraction. We observe a significant arc broadening from ~121 to 82 Myr and magmatic quiescence after ~67 Ma. This is interpreted as a slab shallowing to flattening process. Far‐field tectonic forces would have been produced by increased plate coupling linked to the slab flattening as indirectly indicated by the correlation between Cretaceous arc expansion and intraplate contraction. Finally, the tectonic evolution of the Deseado FTB favors studies supporting inception of Andean shortening since Cretaceous times.

show abstract

Section: Discussionmentioning

confidence: 83%

Cretaceous Intraplate Contraction in Southern Patagonia: A Far‐Field Response to Changing Subduction Dynamics?

et al. 2018

View full text Add to dashboard Cite

show abstract

“…Chelotti & Homovc (1998) la ubican en el intervalo Turoniano-Maastrichtiano. En base a dataciones radimétricas (Ar/Ar) sobre tobas, Bridge et al (2000) obtuvieron valores de 94,2 ±0,63 Ma. para el Miembro Inferior de la Formación Bajo Barreal y 91 ±0,49 Ma.…”

Section: Edad De La Formación Bajo Barrealunclassified

Ordenamiento y caracterización faunística del Cretácico Superior del Grupo Chubut, Cuenca del Golfo San Jorge, Argentina

Casal¹,

Martı́nez²,

Luna³

et al. 2016

Rev. bras. paleontol.

View full text Add to dashboard Cite

-FAUNISTIC ARRANGEMENT OF THE UPPER CRETACEOUS OF CHUBUT GROUP, GULF SAN JORGE BASIN, ARGENTINA. The Chubut Group, central Patagonia, Argentina, is characterized by a lacustrine and fl uvial-lacustrine system with variable participation of volcanic ash. This group includes the Bajo Barreal Formation (Cenomanian-Turonian) and a recently nested new lithostratigraphic unit, the Lago Colhué Huapi Formation (Coniacian-Maastrichtian). The Lago Colhué Huapi Formation overlies the Bajo Barreal Formation. These sedimentary units preserve a rich and diverse vertebrate fossil record including, among others, representatives of Crocodylomorpha, Testudines, Pterosauria and abundant Dinosauria. Nevertheless, the stratigraphic position of several of its taxa has been historically controversial. The unclear stratigraphic provenance of these taxa diffi cults the correct interpretation of the relationships with other Patagonian and South American basins. In this context, we present a detailed stratigraphic study to clarify the position of the vertebrate fossils of both Late Cretaceous formations. We also discuss the implications of this faunistic arrangement in terms of vertebrate evolution and paleobiogeography. Finally, this study broadens our knowledge on the fossil fauna of these units and therefore the vertebrate assemblages of central Patagonia.Key words: Chubut Group, Bajo Barreal and Lago Colhué Huapi formations, Late Cretaceous, vertebrate assemblages.RESUMO -O Grupo Chubut, Patagônia central, Argentina, é caracterizado por um sistema lacustre e fl úvio-lacustre, com uma participação variável de cinza vulcânica. Este grupo inclui a Formação Bajo Barrel (Cenomaniano-Turoniano) e uma nova unidade litoestratigráfi ca recentemente depositada, a Formação Lago Colhué Huapi (Coniaciano-Maastrichtiano). A Formação Lago Colhué Huapi se sobrepõe à Bajo Barreal. Estas unidades sedimentares contêm um rico e diversifi cado registro fóssil de vertebrados que inclui, entre outros, representantes de Crocodylomorpha, Testudines, Pterosauria e abundantes, Dinosauria. Entretanto, as posições estratigráfi cas de muitos destes táxons são historicamente controversas. A origem estratigráfi ca pouco clara desses táxons, difi culta a interpretação correta das relações de seus fósseis com a fauna de outras bacias patagônicas e sul-americanas. Sendo assim, dentro deste contexto, nós apresentamos um posicionamento estratigráfi co detalhado dos vertebrados fósseis das duas formações do Cretácio Superior e discutimos as implicações destes arranjos faunísticos em termos de evolução dos vertebrados e paleobiogeografi a. Por fi m, o presente estudo amplia nosso conhecimento sobre a fauna fóssil destas unidades e também das assembleias de vertebrados da Patagônia central. Palavras-chave:Grupo Chubut, formações Bajo Barreal e Lago Colhué Huapi, Cretáceo Superior, assembleias de vertebrados.

show abstract

“…REVISTA BRASILEIRA DE PALEONTOLOGIA,14(1) (Bonaparte & Gasparini, 1979), Albiano-Cenomaniano (Archangelsky et al, 1994), Cenomaniano medio-Turoniano tardío (Gradstein et al, 1995(Gradstein et al, , 1997Bridge et al, 2000) y Cenomaniano tardío-Turoniano temprano (Lamanna et al, 2002). Los estudios de la fauna dinosauriana y sus correlaciones con unidades equivalentes de la cuenca neuquina, sugieren que la edad de la Formación Bajo Barreal asignada por Gradstein et al (1995Gradstein et al ( , 1997, Bridge et al (2000) y Lamanna et al (2002) sería la que más se ajusta a estos vínculos faunísticos.…”

Section: Materials Y Métodosunclassified

“…Los estudios de la fauna dinosauriana y sus correlaciones con unidades equivalentes de la cuenca neuquina, sugieren que la edad de la Formación Bajo Barreal asignada por Gradstein et al (1995Gradstein et al ( , 1997, Bridge et al (2000) y Lamanna et al (2002) sería la que más se ajusta a estos vínculos faunísticos. Descripción.…”

Section: Materials Y Métodosunclassified

“…nov., en cambio, fue hallado en niveles estratigráficamente altos del Miembro Superior de dicha formación, suprayacidos en forma concordante por la Formación Laguna Palacios asignada al Santoniano-Maastrichtiano (Sciutto, 1981;Fitzgerald et al, 1990;Bridge et al, 2000). De este modo el rango de edad de Drusilasaura deseadensis gen. et sp.…”

Section: Discusión Y Consideraciones Finalesunclassified

See 1 more Smart Citation

Drusilasaura deseadensis gen. et sp. nov., un nuevo titanosaurio (Dinosauria-Sauropoda), de la Formación Bajo Barreal, Cretácico Superior del norte de Santa Cruz, Argentina

Navarrete¹,

Casal²,

Martı́nez³

2011

Rev. bras. paleontol.

View full text Add to dashboard Cite

Geometry, Lithofacies, and Spatial Distribution of Cretaceous Fluvial Sandstone Bodies, San Jorge Basin, Argentina: Outcrop Analog for the Hydrocarbon-Bearing Chubut Group

Cited by 149 publications

References 18 publications

Cretaceous Intraplate Contraction in Southern Patagonia: A Far‐Field Response to Changing Subduction Dynamics?

Cretaceous Intraplate Contraction in Southern Patagonia: A Far‐Field Response to Changing Subduction Dynamics?

Ordenamiento y caracterización faunística del Cretácico Superior del Grupo Chubut, Cuenca del Golfo San Jorge, Argentina

Drusilasaura deseadensis gen. et sp. nov., un nuevo titanosaurio (Dinosauria-Sauropoda), de la Formación Bajo Barreal, Cretácico Superior del norte de Santa Cruz, Argentina

Contact Info

Product

Resources

About