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dc.contributor.author
Maro, Guadalupe
dc.contributor.author
Caffe, Pablo Jorge
dc.date.available
2018-05-24T12:21:31Z
dc.date.issued
2017-09
dc.identifier.citation
Maro, Guadalupe; Caffe, Pablo Jorge; Neogene monogenetic volcanism from the Northern Puna region: products and eruptive styles; Geological Society of London; Geological Society of London Special Publication; 446; 9-2017; 337-359
dc.identifier.issn
0305-8719
dc.identifier.uri
http://hdl.handle.net/11336/46040
dc.description.abstract
The Neogene mafic volcanism of the Northern Puna region in the Central Andes isrepresented by scoria cones and lava flows dispersed over a wide region (c. 9150 km2) as isolated or poorly clustered centres. Although all the products are basaltic andesites to andesites, the behaviour of these magmatic systems resembles that seen in basaltic monogenetic fields. These centreswere studied with the aim of defining the main volcanic lithofacies and evaluating the eruptive styles. The results suggest that the eruptions developed under a dry strombolian dynamic, with brief periods of lava fountaining and hydrovolcanism, the latter usually restricted to the early stagesof cone construction. Changes in eruptive style are thought to be caused by variations in both the internal (e.g. magma ascent) and external (e.g. surficial water availability) conditions. The transitions do not reflect compositional changes, as evidenced by the small chemical differences observed among the products of the studied eruptive centres. Stratigraphic analysis, in additionto a few pre-existing radiometric dates, suggests that this volcanic activity occurred during the Late Miocene to Early Pliocene. This information supports the inference that these eruptions occurred before the peak of Southern Puna mafic volcanism and that they were coeval with eruptions of some of the most important silicic calderas of the Altiplano-Puna Volcanic Complex. Thegood preservation of volcanic edifices reveals that erosion rates were extremely low, in agreement with the high aridity conditions that have prevailed in the Puna region since the Mid- to Late Miocene.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Geological Society of London
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Monogenetic Volcanism
dc.subject
Northern Puna
dc.subject
Andesites
dc.subject
Strombolian
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Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Neogene monogenetic volcanism from the Northern Puna region: products and eruptive styles
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-04-24T15:15:59Z
dc.journal.volume
446
dc.journal.pagination
337-359
dc.journal.pais
Reino Unido
dc.journal.ciudad
Londres
dc.description.fil
Fil: Maro, Guadalupe. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET - Salta. San Salvador de Jujuy; Argentina
dc.description.fil
Fil: Caffe, Pablo Jorge. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias. Instituto de Ecorregiones Andinas. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico CONICET - Salta. San Salvador de Jujuy; Argentina
dc.journal.title
Geological Society of London Special Publication
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://sp.lyellcollection.org/content/446/1/337
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1144/SP446.6
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