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Pampean flat-slab
Mamayuco:
The '''Pampean flat-slab''' is the low angle [[subduction]] of [[lithosphere|oceanic lithosphere]], including [[oceanic crust]], beneath northern [[Chile]] and [[Argentina]]. The flat-slab has caused an [[tectonic uplift|uplift]] of [[Sierras Pampeanas]] which begun first in the north and then moved southwards over millions of years.<ref name=Ramosea2002>Liquid error: wrong number of arguments (1 for 2)</ref> The oldest noted uplift episode associated with Pampean flat-slab is that of [[Sierra de Aconquija]] (27 °S) from 7.6 to 6 million years ago (Ma) in the [[Miocene|Late Miocene epoch]].<ref name=Ramosea2002/> This was followed by the uplift of massifs further south such as Sierra de Famatina (29 °S) that rose 4.5 to 4.19 Ma ago.<ref name=Ramosea2002/>
The Pampean flat-slab has also caused a lull in the [[Andean Volcanic Belt|volcanism in the Andes]] seen in the lack of modern volcanoes between the Central Andean Volcanic Zone and the Southern Andean Volcanic Zone.<ref name="scielo">Liquid error: wrong number of arguments (1 for 2)</ref> The last magmatic acticity in the [[Principal Cordillera]] was about 8.6 Ma ago, while in the Sierras Pampeanas magmatic activity appear to have ended later, about 1.9 Ma ago.<ref name=Ramosea2002/>
==References==
[[Category:Andean Volcanic Belt]]
[[Category:Geology of Atacama Region]]
[[Category:Geology of Catamarca Province]]
[[Category:Geology of Córdoba Province, Argentina]]
[[Category:Geology of Coquimbo Region]]
[[Category:Geology of La Rioja Province, Argentina]]
[[Category:Geology of San Juan Province, Argentina]]
[[Category:Subduction]]
The Pampean flat-slab has also caused a lull in the [[Andean Volcanic Belt|volcanism in the Andes]] seen in the lack of modern volcanoes between the Central Andean Volcanic Zone and the Southern Andean Volcanic Zone.<ref name="scielo">Liquid error: wrong number of arguments (1 for 2)</ref> The last magmatic acticity in the [[Principal Cordillera]] was about 8.6 Ma ago, while in the Sierras Pampeanas magmatic activity appear to have ended later, about 1.9 Ma ago.<ref name=Ramosea2002/>
==References==
[[Category:Andean Volcanic Belt]]
[[Category:Geology of Atacama Region]]
[[Category:Geology of Catamarca Province]]
[[Category:Geology of Córdoba Province, Argentina]]
[[Category:Geology of Coquimbo Region]]
[[Category:Geology of La Rioja Province, Argentina]]
[[Category:Geology of San Juan Province, Argentina]]
[[Category:Subduction]]
June 29, 2019 at 05:28PM
