Mostrar el registro sencillo del ítem
dc.contributor.author
Willner, Arne P.
dc.contributor.author
Gerdes, Axel
dc.contributor.author
Massonne, Hans Joachim
dc.contributor.author
Schmidt, Alexander
dc.contributor.author
Sudo, Masafumi
dc.contributor.author
Thomson, Stuart N.
dc.contributor.author
Vujovich, Graciela Irene
dc.date.available
2019-01-23T20:14:09Z
dc.date.issued
2011-08
dc.identifier.citation
Willner, Arne P.; Gerdes, Axel; Massonne, Hans Joachim; Schmidt, Alexander; Sudo, Masafumi; et al.; The geodynamics of collision of a microplate (Chilenia) in Devonian times deduced by the pressure-temperature-time evolution within part of a collisional belt (Guarguaraz Complex, W-Argentina); Springer; Contributions To Mineralogy And Petrology; 162; 2; 8-2011; 303-327
dc.identifier.issn
0010-7999
dc.identifier.uri
http://hdl.handle.net/11336/68480
dc.description.abstract
The Guarguaraz Complex in West Argentina formed during collision between the microplate Chilenia and South America. It is composed of neritic clastic metasediments with intercalations of metabasic and ultrabasic rocks of oceanic origin. Prograde garnet growth in metapelite and metabasite occurred between 1.2GPa, 470°C and 1.4GPa, 530°C, when the penetrative s2-foliation was formed. The average age of garnet crystallization of 390±2Ma (2σ) was determined from three four-point Lu-Hf mineral isochrones from metapelite and metabasite samples and represents the time of collision. Peak pressure conditions are followed by a decompression path with slight heating at 0.5GPa, 560°C. Fluid release during decompression caused equilibration of mineral compositions at the rims and also aided Ar diffusion. An 40Ar/39Ar plateau age of white mica at 353±1Ma (1σ) indicates the time of cooling below 350-400°C. These temperatures were attained at pressures of 0.2-0.3GPa, indicative of an average exhumation rate of ≥1mm/a for the period 390-353Ma. Late hydrous influx at 0.1-0.3GPa caused pervasive growth of sericite and chlorite and reset the Ar/Ar ages of earlier coarse-grained white mica. At 284-295Ma, the entire basement cooled below 280°C (fission track ages of zircon) after abundant post-collisional granitoid intrusion. The deeply buried epicontinental sedimentary rocks, the high peak pressure referring to a low metamorphic geotherm of 10-12°C/km, and the decompression/heating path are characteristics of material buried and exhumed within a (micro) continent-continent collisional setting.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Albite-Amphibolite Facies
dc.subject
Collision Zone
dc.subject
Fission Track (Zircon)
dc.subject
Garnet
dc.subject
Geothermobarometry
dc.subject
K-Ar System
dc.subject
Lu-Hf System
dc.subject
Potassic White Mica
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
The geodynamics of collision of a microplate (Chilenia) in Devonian times deduced by the pressure-temperature-time evolution within part of a collisional belt (Guarguaraz Complex, W-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
2019-01-23T17:05:51Z
dc.identifier.eissn
1432-0967
dc.journal.volume
162
dc.journal.number
2
dc.journal.pagination
303-327
dc.journal.pais
Alemania
dc.journal.ciudad
Berlín
dc.description.fil
Fil: Willner, Arne P.. Ruhr Universität Bochum; Alemania. Universität Stuttgart; Alemania
dc.description.fil
Fil: Gerdes, Axel. J. W. Goethe Universität; Alemania
dc.description.fil
Fil: Massonne, Hans Joachim. Universität Stuttgart; Alemania
dc.description.fil
Fil: Schmidt, Alexander. Universitat Potsdam; Alemania
dc.description.fil
Fil: Sudo, Masafumi. Universitat Potsdam; Alemania
dc.description.fil
Fil: Thomson, Stuart N.. University of Arizona; Estados Unidos
dc.description.fil
Fil: Vujovich, Graciela Irene. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Estudios Andinos "Don Pablo Groeber". Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Estudios Andinos "Don Pablo Groeber"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Geología. Laboratorio de Tectónica Andina; Argentina
dc.journal.title
Contributions To Mineralogy And Petrology
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://link.springer.com/article/10.1007/s00410-010-0598-8
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1007/s00410-010-0598-8
Archivos asociados