40Ar/39Ar dating of the Jurassic volcanic province of Patagonia: migrating magmatism related to Gondwana break-up and subduction

Féraud, Gilbert; Alric, Viviana Inés; Fornari, Michel; Bertrand, Hervé; Haller, Miguel J.

doi:10.1016/s0012-821x(99)00190-9

Cited by 156 publications

(93 citation statements)

References 27 publications

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“…The Liassic sediments interbedding in the volcanic rocks have been assigned to an intra-arc setting (Page and Page, 1999) or to a Toarcian retro-arc basin (Suárez and Marquez, 2007). Grande (Cortés, 1981).This age has later been roughly confirmed by several authors (Rapela and Pankhurst, 1993;Alric et al, 1996;Féraud et al 1999). Pankhurst and Rapela (1995) proposed a genetic evolution of this unit due to the anatexis of the Patagonian Mesoproterozoic lower crust, and considered that the dacite-rhyolite suite of this unit was formed by crystal-liquid fractionation processes derived from primary andesites.…”

Section: Introductionmentioning

confidence: 61%

Lower Pliensbachian caldera volcanism in high-obliquity rift systems in the western North Patagonian Massif, Argentina

Benedini

Gregori

Strazzere

et al. 2014

Journal of South American Earth Sciences

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Section: Introductionmentioning

confidence: 61%

Lower Pliensbachian caldera volcanism in high-obliquity rift systems in the western North Patagonian Massif, Argentina

Benedini

Gregori

Strazzere

et al. 2014

Journal of South American Earth Sciences

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“…Volcanism spanned more than 30 Ma, but based on SHRIMP U-Pb zircon, Rb-Sr whole-rock and 40 Ar/ 39 Ar data, three episodes of peak activity have been recognized (Feraud et al, 1999;Pankhurst et al, 2000): a Toarcian-Aalenian episode, between 188-178 Ma, a Bajocian-Bathonian episode, between 172 and 162 Ma and an Oxfordian-Kimmeridgian episode, between 157 and 153 Ma. This information agrees with data by other authors working both in Argentina and Chile.…”

Section: Fig 1 Sketch Geologic Map Of Patagonia Modified Aftermentioning

confidence: 99%

“…During the Toarcian-Aalenian (178-188 Ma; Pankhurst et al, 1998Pankhurst et al, , 2000Feraud et al, 1999), the Marifil Formation, a large volume of silicic volcanic rocks forming the earliest volcanic rocks of the Chon Aike Province , developed in northeastern Patagonia (ca. 40º-44ºS), mainly to the east of the Chubut Basin (Fig.…”

Section: Marifil Formation Of the Chon Aike Province: Early Jurassic mentioning

confidence: 99%

Cuenca de retroarco toarciana en Patagonia central (Chubut), Argentina: cierre, migracion del arco y ambiente tectonico durante el Jurasico Medio.

Suárez¹,

Márquez²

2007

Andgeo

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The Chubut Basin (new name for the 'Liassic Western Chubut Basin' of other authors), developed during the Early Jurassic in the western part of central extra-Andean Patagonia in Argentina (42º30'S and 44º30'S), accumulated shallow marine and continental sedimentary beds, with pyroclastic input, of the Osta Arena Formation and equivalent units. To the west it was bounded by a coeval subduction-related magmatic arc (Subcordilleran Plutonic Belt) and a subduction complex of Late Triassic-Early Jurassic age (Chonos Metamorphic Complex). In turn, the eastern basin floor developed over the remnants of a previous Late Triassic-earliest Jurassic magmatic arc (Batholith of Central Patagonia) and over neopaleozoic sedimentary rocks of an accretionary prism. To the east, the basin was limited by a Toarcian volcanic system associated to the Karroo plume. The western magmatic arc continued to the north, where it is represented by the Icalma Member of the Nacientes del Biobío Formation, bounding this time the Neuquén Basin developed to the east. The closure of the Toarcian basin in the Middle Jurassic coincides in time with a migration to the southwest of the Toarcian magmatic arc, from a position in central extra-Andean Patagonia and a NNW orientation, to a location in the Patagonian Cordillera and a north-south orientation. Synchronously, rift-related anatectic silicic volcanism developed east of the basin. Hence, a major change in tectonic setting took place during the Middle Jurassic. It is here proposed that the migration of the arc was related to the growth of a plume under north-eastern Patagonia.

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“…Ar geochronology (Féraud et al 1999;Pankhurst et al 2000) indicate that volcanism continued for as long as 30 Myr, from the Early Jurassic to Late Jurassic, but occurred in three main phases. The first phase of volcanism (188-178 Ma; V1 of Pankhurst et al 2000) has a peak eruptive age of 184 e 2 Ma, and brackets the peak of flood basalt volcanism of the Karoo and Ferrar provinces at 183 e 1 Ma (e.g.…”

mentioning

confidence: 99%

The links between large igneous provinces, continental break-up and environmental change: evidence reviewed from Antarctica

Storey

Vaughan

Riley

2013

Earth and Environmental Science Transactions of the Royal Socie

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Earth history is punctuated by events during which large volumes of predominantly mafic magmas were generated and emplaced by processes that are generally accepted as being, unrelated to 'normal' sea-floor spreading and subduction processes. These events form large igneous provinces (LIPs) which are best preserved in the Mesozoic and Cenozoic where they occur as continental and ocean basin flood basalts, giant radiating dyke swarms, volcanic rifted margins, oceanic plateaus, submarine ridges, and seamount chains. The Mesozoic history of Antarctica is no exception in that a number of different igneous provinces were emplaced during the initial break-up and continued disintegration of Gondwana, leading to the isolation of Antarctica in a polar position. The link between the emplacement of the igneous rocks and continental break-up processes remains controversial. The environmental impact of large igneous province formation on the Earth System is equally debated. Large igneous province eruptions are coeval with, and may drive environmental and climatic effects including global warming, oceanic anoxia and/or increased oceanic fertilisation, calcification crises, mass extinction and release of gas hydrates.This review explores the links between the emplacement of large igneous provinces in Antarctica, the isolation of Antarctica from other Gondwana continents, and possibly related environmental and climatic changes during the Mesozoic and Cenozoic.

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40Ar/39Ar dating of the Jurassic volcanic province of Patagonia: migrating magmatism related to Gondwana break-up and subduction

Cited by 156 publications

References 27 publications

Lower Pliensbachian caldera volcanism in high-obliquity rift systems in the western North Patagonian Massif, Argentina

Lower Pliensbachian caldera volcanism in high-obliquity rift systems in the western North Patagonian Massif, Argentina

Cuenca de retroarco toarciana en Patagonia central (Chubut), Argentina: cierre, migracion del arco y ambiente tectonico durante el Jurasico Medio.

The links between large igneous provinces, continental break-up and environmental change: evidence reviewed from Antarctica

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