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dc.contributor.author
Olivero, Eduardo Bernardo
dc.contributor.author
Torres Carbonell, Pablo Juan
dc.contributor.author
Svojtka, Martin
dc.contributor.author
Fanning, Christopher Mark
dc.contributor.author
Hervé, Francisco
dc.contributor.author
Nývlt, Daniel
dc.date.available
2021-02-26T16:58:27Z
dc.date.issued
2020-12
dc.identifier.citation
Olivero, Eduardo Bernardo; Torres Carbonell, Pablo Juan; Svojtka, Martin; Fanning, Christopher Mark; Hervé, Francisco; et al.; Eocene volcanism in the Fuegian Andes: Evidence from petrography and detrital zircons in marine volcaniclastic sandstones; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 104; 12-2020; 1-28
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/126806
dc.description.abstract
The sedimentology, petrography, and U–Pb dating of two Eocene volcaniclastic horizons of the Punta Torcida and Leticia formations, Austral basin, Tierra del Fuego, Argentina are interpreted and documented. The volcaniclastic deposits, pumicite breccia and tuffaceous sandstones, are formed by glass shards, plagioclase crystals, and pumiceous and lithic andesitic fragments. Originally deposited as tephra fallout, they have been subsequently reworked and redeposited in marine settings. The final deposits, however, are interpreted essentially as syn-eruptive. U–Pb dating of detrital zircons gave a 46.3 ± 0.4 Ma (early Lutetian) age for the top of the Punta Torcida Formation and 41.9 ± 0.71 (late Lutetian) to 39.6 ± 0.82 (Bartonian) ages for the Leticia Formation. Paleogene volcanic rocks are unknown in the Southern Patagonian-Fuegian Andes; hence the studied volcanic deposits with minimal reworking are important to evaluate the time lag between eruption and true depositional ages in detrital zircons. The resulting dates allow evaluating the timing of the important, basin-wide, intra-Eocene unconformity known from Tierra del Fuego to Lago Argentino, Santa Cruz, Argentina. The documented eruptive phases are related to Andean magmatism, probably located in the outcrop area of the Seno Año Nuevo suite in the Chilean Archipelago.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
AUSTRAL-MAGALLANES BASIN
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DETRITAL ZIRCONS
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EOCENE VOLCANISM
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FUEGIANANDES
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U–PB DATING
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Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Eocene volcanism in the Fuegian Andes: Evidence from petrography and detrital zircons in marine volcaniclastic sandstones
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-02-17T20:55:09Z
dc.journal.volume
104
dc.journal.pagination
1-28
dc.journal.pais
Estados Unidos
dc.description.fil
Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina. Universidad Nacional de Tierra del Fuego, Antártida e Islas del Atlántico Sur. Instituto de Ciencias Polares, Ambientales y Recursos Naturales; Argentina
dc.description.fil
Fil: Torres Carbonell, Pablo Juan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Svojtka, Martin. Institute Of Geology; República Checa
dc.description.fil
Fil: Fanning, Christopher Mark. Australian National University; Australia
dc.description.fil
Fil: Hervé, Francisco. Universidad Andrés Bello; Chile. Universidad de Chile; Chile
dc.description.fil
Fil: Nývlt, Daniel. Czech Geological Survey; República Checa
dc.journal.title
Journal of South American Earth Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://linkinghub.elsevier.com/retrieve/pii/S0895981120303965
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2020.102853
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