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dc.contributor.author
Greco, Gerson Alan

dc.contributor.author
Gonzalez, Pablo Diego

dc.contributor.author
González, Santiago Nicolás

dc.contributor.author
Sato, Ana Maria

dc.contributor.author
Stipp Basei, Miguel Angelo

dc.contributor.author
Colombo,Tassinari Celso
dc.contributor.author
Sato, Kei
dc.contributor.author
Varela, Ricardo

dc.contributor.author
Llambias, Eduardo Jorge

dc.date.available
2018-03-19T20:03:48Z
dc.date.issued
2015-10-06
dc.identifier.citation
Greco, Gerson Alan; Gonzalez, Pablo Diego; González, Santiago Nicolás; Sato, Ana Maria; Stipp Basei, Miguel Angelo; et al.; Geology, structure and age of the Nahuel Niyeu Formation in the Aguada Cecilio area, North Patagonian Massif, Argentina; Pergamon-Elsevier Science Ltd; Journal of South American Earth Sciences; 62; 6-10-2015; 12-32
dc.identifier.issn
0895-9811
dc.identifier.uri
http://hdl.handle.net/11336/39266
dc.description.abstract
The low-grade Nahuel Niyeu Formation in the Aguada Cecilio area (40°50'S-65°53'W) shows ultramafic to felsic metaigneous rocks forming a sill swarm intercalated in the metasedimentary sequence and a polyphase deformation which permit an integrated study of the magmatic and tectonometamorphic evolution of this geological unit. In this paper we present a geological characterization of the Nahuel Niyeu Formation in the Aguada Cecilio area combining mapping, structural and metamorphic analysis with a SHRIMP U-Pb age and geochemical data from the metaigneous rocks. The metasedimentary sequence consists of alternating metagreywackes and phyllites, and minor metasandstones and granule metaconglomerates. The sills are pre-kinematic intrusions and yielded one SHRIMP U-Pb, zircon crystallization age of 513.6±3.3Ma. Their injection occurred after consolidation of the sedimentary sequence. A syn-sedimentary volcanic activity is interpreted by a metaandesite lava flow interlayered in the metasedimentary sequence. Sedimentary and igneous protoliths of the Nahuel Niyeu Formation would have been formed in a continental margin basin associated with active magmatic arc during the Cambrian Epoch 2. Two main low-grade tectonometamorphic events affected the Nahuel Niyeu Formation, one during the Cambrian Epoch 2-Early Ordovician and the other probably in the late Permian at ~260Ma. Local late folds could belong to the final stages of the late Permian deformation or be even younger. In a regional context, the Nahuel Niyeu and El Jagüelito formations and Mina Gonzalito Complex show a comparable Cambrian-Ordovician evolution related to the Terra Australis Orogen in the south Gondwana margin. This evolution is also coeval with the late and early stages of the Pampean and Famatinian orogenies of Central Argentina, respectively. The late Permian event recorded in the Nahuel Niyeu Formation in Aguada Cecilio area is identified by comparable structures affecting the Mina Gonzalito Complex and El Jagüelito Formation and resetting ages from granitoids. This event represents the Gondwanide Orogeny within the same Terra Australis Orogen.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Pergamon-Elsevier Science Ltd

dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Cambrian-Ordovician
dc.subject
Late Permian
dc.subject
Low-Grade Metamorphism
dc.subject
Patagonia
dc.subject
Shrimp U-Pb Zircon Age
dc.subject
South Gondwana Margin
dc.subject.classification
Meteorología y Ciencias Atmosféricas

dc.subject.classification
Ciencias de la Tierra y relacionadas con el Medio Ambiente

dc.subject.classification
CIENCIAS NATURALES Y EXACTAS

dc.title
Geology, structure and age of the Nahuel Niyeu Formation in the Aguada Cecilio area, North Patagonian Massif, 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
2018-03-02T14:08:52Z
dc.journal.volume
62
dc.journal.pagination
12-32
dc.journal.pais
Estados Unidos

dc.journal.ciudad
Nueva York
dc.description.fil
Fil: Greco, Gerson Alan. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
dc.description.fil
Fil: Gonzalez, Pablo Diego. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
dc.description.fil
Fil: González, Santiago Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Patagonia Norte. Instituto de Investigación en Paleobiología y Geología; Argentina
dc.description.fil
Fil: Sato, Ana Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Stipp Basei, Miguel Angelo. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Colombo,Tassinari Celso. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Sato, Kei. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: Varela, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.description.fil
Fil: Llambias, Eduardo Jorge. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Investigaciones Geológicas. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Centro de Investigaciones Geológicas; Argentina
dc.journal.title
Journal of South American Earth Sciences

dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1016/j.jsames.2015.04.005
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0895981115000644
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