A paleoclimatic review of southern South America during the late Paleozoic: A record from icehouse to extreme greenhouse conditions

Limarino, Carlos Óscar; Césari, Silvia N.; Spalletti, Luis Antonio; Taboada, Arturo César; Isbell, John L.; Geuna, Silvana Evangelina; Gulbranson, Erik L.

doi:10.1016/j.gr.2012.12.022

Cited by 195 publications

(116 citation statements)

References 144 publications

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“…Limarino et al, 2014). The Siberian f lood basalts cover an area of 2,500,000 km 2 in the Siberian Craton (Fedorenko et al, 1996) and no less than 1,300,000 km 2 in the West Siberian Basin (Reichow et al, 2002).…”

Section: The Choiyoi Magmatic Province In Western Gondwanamentioning

confidence: 99%

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

Spalletti

Limarino

2017

andgeo

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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...

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Section: The Choiyoi Magmatic Province In Western Gondwanamentioning

confidence: 99%

“…In addition, Limarino et al (2014) have highlighted the existence of Permian volcanics in northern Chile, Bolivia and Perú that far exceed the limits of the Choiyoi Province.…”

Section: The Choiyoi Magmatic Province In Western Gondwanamentioning

confidence: 99%

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

Spalletti

Limarino

2017

andgeo

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“…However, recent findings extend the stratigraphic range of the NBG flora to the underlying Guandacol Formation. Both units comprise glacial and postglacial deposits which characterize the Lower and Middle Pennsylvanian in westernmost Gondwana (Limarino et al 2006(Limarino et al , 2014. Some coeval stratigraphic units in the Paganzo, Calingasta-Uspallata and San Rafael basins bearing plant remains are the Jejenes, Volcán, Tupe (San Juan Province), El Imperial, Santa Máxima, Tramojo (Mendoza Province) Tupe and Lagares (La Rioja Province) formations.…”

Section: Stratigraphic Settingmentioning

confidence: 99%

Revision of Fedekurtzia (pteridosperm) and allied fronds from the Carboniferous of Gondwana

Coturel¹,

Césari²

2017

Acta Palaeobotanica

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ABSTRACT. Carboniferous foliage of Fedekurtzia argentina (Kurtz) Archangelsky from Gondwana is systematically described and revised. The frond is reconstructed based on specimens of the late Serpukhovian-Bashkirian Nothorhacopteris/Botrychiopsis/Ginkgophyllum flora of western Argentina, especially from the Jejenes, Tupe and Volcán formations. The whole-frond reconstruction emphasizes the variation in pinnule shape throughout the basal, medial and distal sections of the frond. The basalmost rachis possesses cyclopteroid pinnules grading to pinnae with obovate to wedge-shaped pinnules at the medial section of the frond. Distal pinnae are shorter, bearing imbricate and more dissected pinnules.

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“…Ice-spreading centers located to the west of the Paraná Basin were inferred by Frakes & Crowell (1969), França & Potter (1988) and Limarino et al (2014), assuming that the Asunción Arch was glaciated during the LPIA. The argument used by França & Potter (1988) was based on a high proportion of diamictites in the subsurface.…”

Section: Implications For Paleogeographymentioning

confidence: 99%

A review on late Paleozoic ice-related erosional landforms in the Paraná Basin: origin and paleogeographical implications

2016

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ABSTRACT:The Late Paleozoic Ice Age is recorded in the Paraná Basin as glacial deposits, deformational features and ice-related erosional landforms of the Itararé Group. Erosional landforms are often employed to build paleogeographic models that depict the location of ice masses and paleo ice-flow directions. This paper provides a review of the literature and new data on micro-to meso-scale ice-related, erosional landforms of the Paraná Basin. Examined landforms can be placed into four broad categories based on their mode of origin. Subglacial landforms on rigid substrates occur on the Precambrian basement or on older units in the Paraná Basin. They include streamlined landforms and striated pavements formed by abrasion and/or plucking beneath advancing glaciers. Subglacial landforms on soft beds are intraformational surfaces generated by erosion and deformation of unconsolidated deposits when overridden by glaciers. Ice-keel scour marks are soft-sediment striated/grooved landforms developed by the scouring of free-floating ice masses on underlying sediments. Striated clast pavements are horizons containing aligned clasts that are abraded subglacially due to the advance of glaciers on unconsolidated deposits. Only those erosional landforms formed subglacially can be used as reliable paleo ice-flow indicators. Based on these data, the paleogeography of the Paraná Basin during the Late Paleozoic Ice Age fits into a model of several glacial lobes derived from topographically-controlled ice spreading centers located around the basin instead of a single continental ice sheet. KEYWORDS:Late Paleozoic Ice Age; Itararé Group; glacial erosion; paleogeography. RESUMO: A Era Glacial Neopaleozoica está registrada na Bacia do Paraná através da sucessão sedimentar do Grupo Itararé e unidades correlatas, bem como por feições glaciotectônicas e formas de leito erosivas relacionadas à ação do gelo. Formas de leito erosivas são comumente utilizadas em análises paleogeográficas visando evidenciar o sentido de fluxo de geleiras e localizar antigos centros irradiadores de gelo. Neste trabalho é apresentada uma revisão da literatura e novos dados sobre formas de leito erosivas de micro a mesoescala

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A paleoclimatic review of southern South America during the late Paleozoic: A record from icehouse to extreme greenhouse conditions

Cited by 195 publications

References 144 publications

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

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

Revision of Fedekurtzia (pteridosperm) and allied fronds from the Carboniferous of Gondwana

A review on late Paleozoic ice-related erosional landforms in the Paraná Basin: origin and paleogeographical implications

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