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dc.contributor.author
Olivero, Eduardo Bernardo
dc.contributor.author
Martinioni, Daniel Roberto
dc.date.available
2020-01-16T19:54:07Z
dc.date.issued
2001-01
dc.identifier.citation
Olivero, Eduardo Bernardo; Martinioni, Daniel Roberto; A review of the geology of the Argentinian Fuegian Andes; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 14; 2; 1-2001; 175-188
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/94966
dc.description.abstract
Seven stratigraphic units reflect the tectonic evolution of the Argentinian Fuegian Andes: Basement (Paleozoic-Jurassic); Lemaire Formation (Upper Jurassic); Yahgan-Beauvoir formations (Lower Cretaceous); Cerro Matrero Formation (Upper Cretaceous); Río Claro Formation (Paleocene); La Despedida Group (Eocene); and Cabo Peña Formation (uppermost Eocene-Lower Oligocene). Basement rocks (garnet, quartz-sericite, and chlorite schists; and amphibolites) are unconformably covered by the Lemaire Formation (rhyolites; basalts; slates; and acidic volcaniclastic breccias, tuffs, conglomerates, and turbidites), formed during extensional tectonism. The post-rift Yahgan Formation (deep-marine black mudstones, andesitic volcaniclastic turbidites and tuffs) interfingers northward with the Beauvoir Formation (slope and platform black mudstones), and covers the Lemaire Formation unconformably. The Yahgan Formation represents an andesitic. volcaniclastic apron, coeval with a Pacific volcanic-arc, filling a marginal basin floored with oceanic crust. The Late Cretaceous compressional orogeny resulted in tectonic inversion, closure of the marginal basin, peak metamorphism and folding, and initial uplifting of the Fuegian Andes. By the latest Cretaceous-earliest Paleogene, the Andes were exposed to subacrial erosion, and the lowest Danian Río Claro Formation bears clear evidence of an Andean clastic provenace. The Río Claro Formation represents the first molasse deposits of the foreland stage of evolution of the Fuegian Andes. Earliest Paleogene north-verging thrust propagation deformed the Río Claro Formation and older units, producing northward depocenter migration. La Despedida Group rests unconformably on the Río Claro Formation and is involved in the thrust and fold belt. Important Eocene compression resulted in thrusting of central Andean basement schists and the Lemaire Formation over Lower Cretaceous and continental Paleogene rocks, respectively. In the Argentinian Fuegian Andes, the compressional orogeny ceased by the Late Eocene and the subhorizontal Cabo Peña Formation unconformably overlies folded La Despedida Group strata. Field mapping suggests a left-lateral offset of 20-30 km of Cretaceous-Eocene rocks along the Magallanes-Fagnano Fault System: this is clear evidence that the strike-slip regime has been active since at least the latest Eocene.
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
GEOLOGY
dc.subject
MESOZOIC-CENOZOIC
dc.subject
TIERRA DEL FUEGO
dc.subject.classification
Geología
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
A review of the geology of the Argentinian Fuegian Andes
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-01-15T19:04:35Z
dc.journal.volume
14
dc.journal.number
2
dc.journal.pagination
175-188
dc.journal.pais
Países Bajos
dc.journal.ciudad
Amsterdam
dc.description.fil
Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Martinioni, Daniel Roberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.journal.title
Journal of South American Earth Sciences
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981101000165
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1016/S0895-9811(01)00016-5