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dc.contributor.author
Hauzenberger, C. A.
dc.contributor.author
Mogessie, A.
dc.contributor.author
Hoinkes, G.
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Felfernig, A.
dc.contributor.author
Bjerg, Ernesto Alfredo
dc.contributor.author
Kostadinoff, Jose
dc.contributor.author
Delpino, Sergio Hugo
dc.contributor.author
Dimieri, Luis Vicente
dc.date.available
2019-06-05T15:25:40Z
dc.date.issued
2001-01
dc.identifier.citation
Hauzenberger, C. A.; Mogessie, A.; Hoinkes, G.; Felfernig, A.; Bjerg, Ernesto Alfredo; et al.; Metamorphic evolution of the Sierras de San Luis, Argentina: granulite facies metamorphism related to mafic intrusions; Springer Wien; Mineralogy and Petrology; 71; 1-2; 1-2001; 95-126
dc.identifier.issn
0930-0708
dc.identifier.uri
http://hdl.handle.net/11336/77633
dc.description.abstract
The Sierras de San Luis, which are part of the Sierras Pampeanas, are located in Central Argentina. The crystalline basement of the Sierras de San Luis is built up of three main blocks (western block, central block, and eastern block), which are separated by mylonite zones. The western and the eastern block are dominated by migmatites, whereas the central block is mostly lower in metamorphic grade ranging from greenschist facies to amphibolite facies, and locally to granulite facies in the vicinity of numerous mafic bodies. Most parts of the central block is built up of amphibolite facies rocks. These were formed during a first metamorphic event (M1-A) which is characterized by a mineral assemblage of staurolite-garnet-biotite-muscovite-plagioclase-quartz- ilmenite±fibrolite±chlorite. The PT conditions of M1-A are about 570°C to 600°C and 5 to 5.7 kbar. A mafic intrusion, now seen as numerous mafic lenses included in the basement rocks caused local granulite facies metamorphism. The observed mineral assemblage consists of garnet-cordierite-sillimanite-biotite-K-feldspar-plagioclase-quartz-rutile- ilmenite±orthopyroxene (M2-G). The PT estimates for granulite facies conditions are 740°C to 790°C and 5.7 to 6.4 kbar. During cooling a mylonite zone developed within the central block retrograding most of the granulite facies rocks to amphibolite facies conditions. The newly formed mineral assemblage consists of garnet-biotite-sillimanite-plagioclase-muscovite-quartz-rutile±K-feldspar (M3-A). The PT estimates of the locally overprinting second amphibolite facies event (M3-A) are about 590°C to 650°C and 5.4 to 6.0 kbar. The deduced PT path shows a near isobaric heating from M1-A to M2-G. The mylonite mineral assemblage M3-A equilibrated at pressures close to M2-G. The PT path can be explained best by heating of an amphibolite facies middle crust by a mafic intrusion. During near-isobaric cooling tectonic activity in discrete parts of the basement caused mylonitization at amphibolite facies conditions.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer Wien
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Metamorphic evolution of the Sierras de San Luis, Argentina: granulite facies metamorphism related to mafic intrusions
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2019-06-03T14:27:37Z
dc.identifier.eissn
1438-1168
dc.journal.volume
71
dc.journal.number
1-2
dc.journal.pagination
95-126
dc.journal.pais
Austria
dc.journal.ciudad
Viena
dc.description.fil
Fil: Hauzenberger, C. A.. Karl-Franzens University Graz; Austria
dc.description.fil
Fil: Mogessie, A.. Karl-Franzens University Graz; Austria
dc.description.fil
Fil: Hoinkes, G.. Karl-Franzens University Graz; Austria
dc.description.fil
Fil: Felfernig, A.. Karl-Franzens University Graz; Austria
dc.description.fil
Fil: Bjerg, Ernesto Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
dc.description.fil
Fil: Kostadinoff, Jose. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
dc.description.fil
Fil: Delpino, Sergio Hugo. Universidad Nacional del Sur. Departamento de Geología; Argentina
dc.description.fil
Fil: Dimieri, Luis Vicente. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Bahía Blanca. Instituto Geológico del Sur. Universidad Nacional del Sur. Departamento de Geología. Instituto Geológico del Sur; Argentina
dc.journal.title
Mineralogy and Petrology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s007100170048
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s007100170048
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