Mostrar el registro sencillo del ítem
dc.contributor.author
Olivero, Eduardo Bernardo
dc.contributor.author
Malumian, Norberto
dc.date.available
2021-11-30T18:32:09Z
dc.date.issued
2008-03-26
dc.identifier.citation
Olivero, Eduardo Bernardo; Malumian, Norberto; Mesozoic-Cenozoic stratigraphy of the Fuegian Andes, Argentina; Universidad de Barcelona; Geologica Acta; 6; 1; 26-3-2008; 5-18
dc.identifier.issn
1695-6133
dc.identifier.uri
http://hdl.handle.net/11336/147756
dc.description.abstract
The stratigraphy of the Argentinean Fuegian Andes reveals contrasting Mesozoic-Cenozoic tectonic regimes. The Lemaire Formation, submarine complex of bimodal volcanites, breccias, and sedimentary rocks; the Yahgán Formation, volcaniclastic apron of deep-marine andesite-rich turbidites and mudstones; and the Beauvoir Formation, slope mudstones, all evidence late Jurassic early Cretaceous extension and consequent origination of the Rocas Verdes Marginal Basin. The basal late Cretaceous ductile deformation, isoclinal folding, and metamorphism of these rocks indicate a compressional tectonic regime that resulted in the closure of the marginal basin. The Fuegian Andes were uplifted by the late Campanian; subsequent propagation of the compressional deformation and subsidence by tectonic loading along the northern orogenic margin originated the Austral and Malvinas foreland basins. The Turonian-lower Campanian “Estratos de Buen Suceso” represents the final stages of the closure of the marginal basin and/or the beginning of the foreland basins. During the late Campanian to mid Miocene, the foraminiferal assemblages allow precise dating of the main tectonic events and with the associated trace fossils and sedimentary facies, the general characterization of the depositional settings. The thrust and fold belt of the Austral/Malvinas basins includes three depocenters: 1) the Bahía Thetis (upper Campanian-Maastrichtian), Policarpo (upper Maastrichtian/Danian), and Tres Amigos (upper Paleocene) Formations, mostly turbidite settings with cosmopolitan agglutinated foraminifers; 2) the Río Claro Group, upper Paleocene-lower Eocene; and 3) the La Despedida Group, representing the extended upper mid Eocene-upper Eocene transgression with endemic foraminifers. A fourth depocenter, the Oligocene-mid Miocene Cabo Domingo Group mostly deposited below the calcite compensation depth and characterized by widespread agglutinated foraminifers, represents the last and deepest foredeep, originated just north of the fold belt during the waning compressional phase. Reduced exposures of mid Eocene bryozoan limestones, the Río Bueno Formation, and fluvial upper Eocene lower Oligocene, the Punta Cactus and Sloggett Formations, conform reduced exposures within the fold belt. The late Miocene-Pliocene, shallow marine “estratos de la María Luisa” and Irigoyen Formation, the latter with foraminifers suggesting an Atlantic-Pacific connection, record Cenozoic transcurrency and pull-apart basins.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Universidad de Barcelona
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-sa/2.5/ar/
dc.subject
FUEGIAN ANDES
dc.subject
STRATIGRAPHY
dc.subject
MESOZOIC
dc.subject
CENOZOIC
dc.subject.classification
Geología
dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Mesozoic-Cenozoic stratigraphy of the Fuegian Andes, Argentina
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2021-08-05T20:37:41Z
dc.journal.volume
6
dc.journal.number
1
dc.journal.pagination
5-18
dc.journal.pais
España
dc.journal.ciudad
Barcelona
dc.description.fil
Fil: Olivero, Eduardo Bernardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Austral de Investigaciones Científicas; Argentina
dc.description.fil
Fil: Malumian, Norberto. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Industria y Minería. Servicio Geológico Minero Argentino; Argentina
dc.journal.title
Geologica Acta
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://revistes.ub.edu/index.php/GEOACTA/article/view/104.000000238
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://dialnet.unirioja.es/servlet/articulo?codigo=2551447
Archivos asociados