Did Patagonia collide with Gondwana in the late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif

The origin of Patagonia and its relations with the South American crustal blocks to the north have been a matter of debate for decades. We report results from a multidisciplinary study centered on Paleozoic granitoids exposed in the northeastern corner of the North Patagonian Massif. Microstructural...

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Autor principal: Rapalini, A.E
Otros Autores: López de Luchi, M., Martínez Dopico, C., Lince Klinger, F., Giménez, M., Martínez, P.
Formato: Capítulo de libro
Lenguaje:Inglés
Publicado: 2010
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100 1 |a Rapalini, A.E. 
245 1 0 |a Did Patagonia collide with Gondwana in the late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif 
260 |c 2010 
270 1 0 |m Rapalini, A. E.; Instituto de Geofísica Daniel A.Valencio, Departamento de Ciencias Geológicas, FCEyN, Universidad de Buenos Aires, Pabellón 2, Ciudad Universitaria, Buenos Aires, Argentina; email: rapalini@gl.fcen.uba.ar 
506 |2 openaire  |e Política editorial 
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504 |a Zappettini, E.O., Chernicoff, C.J., Villar, M.L., La Faja De Metagabros De La Pampa: Evidencias Geoquímicas Y Petrológicas De Un Magmatismo De Retroarco En La Region Centro-austral Argentina (2005) La Plata, 16th Congreso Geológico Argentino, pp. 45-52. , Actas III 
520 3 |a The origin of Patagonia and its relations with the South American crustal blocks to the north have been a matter of debate for decades. We report results from a multidisciplinary study centered on Paleozoic granitoids exposed in the northeastern corner of the North Patagonian Massif. Microstructural and magnetofabric studies reveal two suites of granitoids. Late Carboniferous (?) granitoids (Yaminué Complex, Tardugno Granodiorite, Cabeza de Vaca leucogranite) were emplaced and subsequently deformed in a major NNE-SSW compressive stress regime that also provoked top-to-the-SW thrust deformation in shallow crustal levels. Gravity and geobarometric studies show that the same major deformation event has been recorded at different crustal levels. The age and type of deformation of this event recorded across the northern boundary of Patagonia strongly supports a Late Carboniferous - Early Permian frontal collision between Patagonia and Gondwana. This major deformation event ceased by 281 Ma when the Navarrete Plutonic Complex, which shows mainly magmatic fabrics, was emplaced under a far-field WNW-ESE stress regime. Crustal continuity between the North Patagonian Massif and the Pampia and Arequipa- Antofalla terranes is suggested by similar Late Paleoproterozoic crustal model ages, comparable detrital zircon ages in Early Paleozoic successions, the apparent continuity of an Early Ordovician continental magmatic arc and paleomagnetic data. Reconciliation of this evidence with the Late Paleozoic frontal collision is obtained in a tectonic model that suggests that the North Patagonian Massif is a parautochthonous crustal block.  |l eng 
593 |a Instituto de Geofísica Daniel A.Valencio, Departamento de Ciencias Geológicas, FCEyN, Universidad de Buenos Aires, CONICET, Pabellón 2, Ciudad Universitaria, Buenos Aires, Argentina 
593 |a Instituto de Geocronología y Geología Isotópica (INGEIS), Universidad de Buenos Aires-CONICET, Argentina 
593 |a Instituto Sismológico Volponi, Universidad Nacional de San Juan, CONICET, Argentina 
690 1 0 |a COLLISION 
690 1 0 |a GONDWANA 
690 1 0 |a LATE PALEOZOIC 
690 1 0 |a MAGMATISM 
690 1 0 |a PATAGONIA 
690 1 0 |a COLLISION ZONE 
690 1 0 |a DEFORMATION 
690 1 0 |a EMPLACEMENT 
690 1 0 |a GEOBAROMETRY 
690 1 0 |a GONDWANA 
690 1 0 |a GRANITOID 
690 1 0 |a MAGMATISM 
690 1 0 |a MAGNETIC FABRIC 
690 1 0 |a MICROSTRUCTURE 
690 1 0 |a PALEOZOIC 
690 1 0 |a PATAGONIA 
700 1 |a López de Luchi, M. 
700 1 |a Martínez Dopico, C. 
700 1 |a Lince Klinger, F. 
700 1 |a Giménez, M. 
700 1 |a Martínez, P. 
773 0 |d 2010  |g v. 8  |h pp. 349-371  |k n. 4  |p Geol. Acta  |x 16956133  |w (AR-BaUEN)CENRE-8135  |t Geologica Acta 
856 4 1 |u https://www.scopus.com/inward/record.uri?eid=2-s2.0-79551531059&doi=10.1344%2f105.000001577&partnerID=40&md5=e8ec19293f6daad08f996087aa276ccd  |y Registro en Scopus 
856 4 0 |u https://doi.org/10.1344/105.000001577  |y DOI 
856 4 0 |u https://hdl.handle.net/20.500.12110/paper_16956133_v8_n4_p349_Rapalini  |y Handle 
856 4 0 |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_16956133_v8_n4_p349_Rapalini  |y Registro en la Biblioteca Digital 
961 |a paper_16956133_v8_n4_p349_Rapalini  |b paper  |c PE 
962 |a info:eu-repo/semantics/article  |a info:ar-repo/semantics/artículo  |b info:eu-repo/semantics/publishedVersion 
999 |c 68431