Paleoenvironments and age of the Talampaya Formation: The Permo-Triassic boundary in northwestern Argentina

Gulbranson, Erik L.; Ciccioli, Patricia L.; Montañez, Isabel P.; Marenssi, Sergio A.; Limarino, Carlos Óscar; Schmitz, Mark D.; Davydov, Vladimir I.

doi:10.1016/j.jsames.2015.08.008

Cited by 44 publications

(27 citation statements)

References 39 publications

(47 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the Cuyana Basin, the top of the basal Rio Mendoza Formation was dated to 243 ± 5 Ma (Ávila et al 2006), suggesting that sedimentation began in Early Triassic times. In the Bermejo Basin, the Talampaya Formation yielded a 252 ± 1 Ma age (Gulbranson et al 2015), so that sedimentation would have occurred across the Permo-Triassic boundary.…”

Section: A1 Continental Basins Of Sw Gondwana: Correlations and Evolu...mentioning

confidence: 99%

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

et al. 2022

View full text Add to dashboard Cite

We conducted a U–Pb–Hf isotope study on zircon crystals from ignimbrites of the Changhsingian to Olenekian (253–248 Ma) Los Menucos Basin in the North Patagonian Massif (NPM), Argentina, in order to evaluate the age and petrogenesis of the magmas. Additionally, a compilation of whole-rock geochemistry and U–Pb–Hf in zircon isotope data for the Permian to Middle Triassic rocks of the NPM, for comparison with our data, was made to assess whether Patagonia would have been an exotic terrane accreted to SW Gondwana during the late Palaeozoic. We interpret the available U–Pb–Hf data to suggest that northern Patagonia experienced eastward arc expansion from the early Permian, about 273 Ma ago. This ∼820 km arc expansion event involved crustal shortening and magmatism with high-silica adakitic affinity, resulting in Hf-isotopic pull-down. At 253 Ma, slab steepening became associated with the coeval emplacement of ignimbrites of the Los Menucos Basin, which involved post-orogenic to intraplate magmatism. During the Middle Triassic, a slab break-off triggered uplift and basaltic underplating, promoting the emplacement of dike swarms with C-type adakitic signature at 246–244 Ma. The Hf isotope data for SW Gondwana for the same period indicate distinct trends that are explained here by differential slab roll-back since the Guadalupian, in a slab-tearing setting. Therefore, Permian to Middle Triassic magmatism is interpreted as having been associated with an eastward-directed proto-Pacific subduction system, which ultimately supports an autochthonous origin for Patagonia.

show abstract

Section: A1 Continental Basins Of Sw Gondwana: Correlations and Evolu...mentioning

confidence: 99%

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

et al. 2022

View full text Add to dashboard Cite

show abstract

“…The deposition of the Talampaya Formation has been historically considered to occur during the Early Triassic. However, a recent radioisotopic date of a sample collected in the upper part of the Talampaya Formation yielded an age of 252.38 (+0.09/-0.22) Ma, indicating that the deposition of this unit and, therefore, the base of the Ischigualasto-Villa Unión Basin took part during the late Permian, or even before, and continued into the Early Triassic (Gulbranson et al, 2015) (Fig. 2).…”

Section: Ischigualasto-villa Unión Basin (Argentina)mentioning

confidence: 99%

The stem-archosaur evolutionary radiation in South America

Ezcurra

Montefeltro

Pinheiro

et al. 2021

Journal of South American Earth Sciences

View full text Add to dashboard Cite

The oldest archosauromorphs (dinosaurs, birds, crocodiles, and their stem-taxa) are recorded in middle− upper Permian rocks, but it was not after the Permo− Triassic mass extinction that the group shows a substantially high taxonomic richness and ecomorphological disparity. The early evolutionary history of the Archosauromorpha during the Early and Middle Triassic is mainly based on fossils recovered from rocks in southern Africa, Europe and Asia, whereas South America possesses a more complete fossil record of the group only in the Late Triassic.Here we revisit, discuss, and reanalyse the non-archosaurian archosauromorph fossil record of the current-day South America. The Early Triassic archosauromorph record in this continent is still scarce, but it documents the early evolution of the group in western Pangaea and is crucial to understand more globally the biotic recovery after the Permo− Triassic mass extinction. The Middle Triassic record is extremely scarce, but the Late Triassic archosauromorph assemblage of South America is among the most diverse and abundant worldwide. The last decade has witnessed a considerable improvement in our knowledge of the record, taxonomy, phylogeny, and macroevolution of the group with the input from the South American fossils. Nevertheless, a considerable amount of research is needed and ideally should be focused on some particular aspects of the Triassic evolutionary radiation of Archosauromorpha. Among them, the Early Triassic record should be expanded, more numerous and more complete Middle Triassic archosauromorph specimens are crucial to have a more complete picture of the evolution of the group, and the taxonomy of groups like proterochampsids and hyperodapedontine rhynchosaurs should be clarified through detailed anatomical work.

show abstract

“…These conditions are represented by the establishment of erg systems, one Cisuralian (Limarino and Spalletti, 1986;Spalletti et al, 2010;Gulbranson et al, 2010;Limarino et al, 2014) and the other very close to the Permian-Triassic boundary (ca. 252 Ma; Gulbranson et al, 2015). These two drastic environmental changes could be related to peaks of volcanic activity leading to rapid CO 2 and CH 4 outbursts to the atmosphere.…”

Section: The Sedimentary Record In Retroarc Basins and Pulses Of Extrmentioning

confidence: 99%

The Choiyoi magmatism in south western Gondwana: implications for the end-permian mass extinction - a review

Spalletti

Limarino

2017

andgeo

View full text Add to dashboard Cite

ABSTRACT. The end of the Permian period is marked by global warming and the biggest known mass extinction on Earth. The crisis is commonly attributed to the formation of large igneous provinces because continental volcanic emissions have the potential to control atmospheric carbon dioxide (CO 2 ) levels and climate change. We propose that in southwestern Gondwana the long-term hothouse Permian environmental conditions were associated with the development of the Choiyoi magmatism. This large igneous province was developed between the Cisuralian and the early Triassic. It covers an area estimated at 1,680,000 km 2 with an average thickness of 700 m, so that the volume of effusive and consanguineous rocks is estimated at 1,260,000 km 3 . Towards the western sector of the study region, a major overlap exists between the regional development of the Choiyoi magmatism and the Carboniferous sedimentary basins, which include paralic and continental deposits with intercalations of peat and coal beds. Commonly, these upper Palaeozoic deposits accumulated on a thick substrate composed of Cambro-Ordovician carbonates and Ordovician to Devonian terrigenous sedimentary rocks characterised by a large proportion of dark organic-rich shales and turbidite successions. While extensive volcanism released large masses of carbon dioxide into the Permian atmosphere, the heating of Palaeozoic organic-rich shales, peat and carbonates by ascending magma led to CO 2 and CH 4 gas generation in sufficient volumes to amplify the major climatic change. The analysis of the almost continuous record of Permian redbeds in the Paganzo basin, where the Choiyoi magmatism is not recorded, allowed us to recognize two main pulses of strong environmental desiccation, one at the Cisuralian and the second around the end-Permian. These two drastic climatic crisis are attributed to peaks of CO 2 and CH 4 outbursts to the atmosphere and related collateral effects, such as acid rain, impoverishment of soils and increase in forest-fire frequency. We propose that the combination of these multiple mechanisms triggered the decline of biodiversity in southwestern Gondwana and caused the end-Permian extinction of most of the Glossopteridales. RESUMEN. El magmatismo Choiyoi en el sudoeste de Gondwana: su implicancia en la extinción en masa del Pérmico tardío -una revisión. El final del Pérmico está caracterizado por un proceso de calentamiento global que llevó a la mayor extinción en masa registrada en la Tierra. Esta crisis se atribuye comúnmente a la generación de grandes provincias ígneas en ámbito continental, cuyas emisiones volcánicas han controlado los niveles de CO 2 en la atmósfera y el consecuente cambio climático. En este trabajo se propone que las condiciones fuertemente cálidas (hothouse) del Pérmico en el sudoeste de Gondwana estuvieron asociadas con el desarrollo del magmatismo Choiyoi. Esta provincia ígnea, que se desarrolló durante el lapso Cisuraliano-Triásico temprano, cubrió un área estimada en 1.680.000 km 2 con un espesor medio de 700 m, de modo...

show abstract

Paleoenvironments and age of the Talampaya Formation: The Permo-Triassic boundary in northwestern Argentina

Cited by 44 publications

References 39 publications

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

The origin of Patagonia: insights from Permian to Middle Triassic magmatism of the North Patagonian Massif

The stem-archosaur evolutionary radiation in South America

The Choiyoi magmatism in south western Gondwana: implications for the end-permian mass extinction - a review

Contact Info

Product

Resources

About