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dc.contributor.author
Cingolani, Carlos Alberto
dc.contributor.author
Llambias, Eduardo Jorge
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Stipp Basei, Miguel Angelo
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Uriz, Norberto Javier
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Chemale, Farid Jr.
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Abre, Paulina
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Cingolani, Carlos Alberto
dc.date.available
2021-05-31T14:59:43Z
dc.date.issued
2017
dc.identifier.citation
Cingolani, Carlos Alberto; Llambias, Eduardo Jorge; Stipp Basei, Miguel Angelo; Uriz, Norberto Javier; Chemale, Farid Jr.; et al.; The Rodeo de la Bordalesa Tonalite dykes as a Lower Devonian magmatic event: Geochemical and isotopic age constraints; Springer; 2017; 221-238
dc.identifier.isbn
978-3-319-50153-6
dc.identifier.uri
http://hdl.handle.net/11336/132845
dc.description.abstract
One of the ‘pre-Carboniferous units’ from the San Rafael Block is the sedimentary Río Seco de los Castaños Formation, which is distributed in isolated outcrops within the Block. At the Rodeo de la Bordalesa area two small intrusives in the mentioned unit were mapped, composed of tonalitic rocks, lamprophyre (‘spessartite-kersantite’) and aplite dykes. We present in this paper, geochemical and isotopic data from the gray tonalitic rocks with abundant mafic enclaves and late magmatic aplite veins. The country rocks are a folded sequence of feldspathic sandstones, wackes, and shales. The Rodeo de la Bordalesa tonalite dykes are characterized by high to medium potassium concentration, with metaluminous composition and I-type calc-alkaline signature. The 401 ± 4 Ma U–Pb zircon age corresponds to the emplacement time and it is confirmed by the K–Ar biotite age. The Rb–Sr whole rocks and biotite age of 374 ± 4 Ma could be related to deformation during the ‘Chanic’ tectonic phase. Nd model ages (TDM) show an interval between 1 and 1.6 Ga, indicating Mesoproterozoic age derivation, whereas the negative ε Nd is typical from crustal sources. The crystallization age for the Rodeo de la Bordalesa tonalite corresponds to a Lower Devonian time and suggests that part of the Late Famatinian magmatic event is present in the San Rafael Block . The dykes are contemporaneous with the large peraluminous batholith in Pampeanas Ranges, with the transpressional shear belts during ‘Achalian’ event and could be correlated with the Devonian magmatism present in the southern part of the Frontal Cordillera. The geochemical and geochronological data allow us to differentiate the Rodeo de la Bordalesa tonalite from the mafic rocks exposed at the El Nihuil area.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
San Rafael Block
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Tonalite dykes
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Geochronology
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Lower Devonian
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Magmatic event
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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
The Rodeo de la Bordalesa Tonalite dykes as a Lower Devonian magmatic event: Geochemical and isotopic age constraints
dc.type
info:eu-repo/semantics/publishedVersion
dc.type
info:eu-repo/semantics/bookPart
dc.type
info:ar-repo/semantics/parte de libro
dc.date.updated
2021-05-28T16:00:32Z
dc.journal.pagination
221-238
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Cingolani, Carlos Alberto. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina. 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
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Fil: Stipp Basei, Miguel Angelo. Universidade de Sao Paulo; Brasil
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Fil: Uriz, Norberto Javier. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina
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Fil: Chemale, Farid Jr.. Universidade Federal do Rio Grande do Sul; Brasil
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Fil: Abre, Paulina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División geología; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/978-3-319-50153-6_12
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/chapter/10.1007%2F978-3-319-50153-6_12
dc.conicet.paginas
267
dc.source.titulo
Pre-Carboniferous evolution of the San Rafael Block, Argentina: Implications in SW Gondwana Margin
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