Magnetic fabric and microstructures of Late Paleozoic granitoids from the North Patagonian Massif: Evidence of a collision between Patagonia and Gondwana?
Widespread Late Paleozoic magmatism in northern Patagonia is a target to test hypotheses on the long standing question over the origin of Patagonia. In recent years, a dispute over whether it is an accreted crustal block that collided with Gondwana in Paleozoic times or an autochthonous part of Sout...
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2010
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| LEADER | 24850caa a22019457a 4500 | ||
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| 001 | PAPER-7626 | ||
| 003 | AR-BaUEN | ||
| 005 | 20230518203723.0 | ||
| 008 | 190411s2010 xx ||||fo|||| 00| 0 eng|d | ||
| 024 | 7 | |2 scopus |a 2-s2.0-78650075430 | |
| 040 | |a Scopus |b spa |c AR-BaUEN |d AR-BaUEN | ||
| 100 | 1 | |a López de Luchi, M.G. | |
| 245 | 1 | 0 | |a Magnetic fabric and microstructures of Late Paleozoic granitoids from the North Patagonian Massif: Evidence of a collision between Patagonia and Gondwana? |
| 260 | |c 2010 | ||
| 270 | 1 | 0 | |m López de Luchi, M.G.; Instituto Nacional de Geocronología y Geología Isotópica (INGEIS), CONICET-Universidad de Buenos AiresArgentina; email: deluchi@ingeis.uba.ar |
| 506 | |2 openaire |e Política editorial | ||
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| 520 | 3 | |a Widespread Late Paleozoic magmatism in northern Patagonia is a target to test hypotheses on the long standing question over the origin of Patagonia. In recent years, a dispute over whether it is an accreted crustal block that collided with Gondwana in Paleozoic times or an autochthonous part of South America has taken place. As part of a multidisciplinary study, an integrated microstructural and magnetic fabric study was carried out on the Late Carboniferous Yaminué Complex and the Early Permian Navarrete Plutonic Complex, both exposed in the northeastern corner of the North Patagonian Massif (40.5°S, 67.0°W). Other investigated units are the Late Carboniferous Tardugno Granodiorite, the newly defined Cabeza de Vaca Granite and the Late Permian San Martin pluton. Over 300 oriented cores from 60 sites were collected for anisotropy of magnetic susceptibility (AMS) measurements. A systematic analysis of around 100 petrographic thin sections was performed to characterize the microstructures of the different magmatic units. Microstructures in the Yaminué Complex are indicative of a transition from magmatic to solid-state deformation. Microstructures of the orthogneiss of tonalitic composition suggest an early stage in the emplacement history of this complex. The Cabeza de Vaca Granite, intrusive in Yaminué Complex, is the most evolved unit and records less intense high-temperature solid-state deformation which suggests that the stress field that controlled the emplacement of the Yaminué Complex outlasted it. According to petrologic and structural considerations, the Navarrete Plutonic Complex has been subdivided into three facies, i.e. Robaina, Guanacos and Aranda, respectively. Microstructures of the Navarrete Plutonic Complex are mostly magmatic to submagmatic, versus the solid-state fabric that characterizes the Robaina facies at the contact with the Yaminué Complex. Combined analyses of AMS and microstructural data lead us to suggest that the Yaminué Complex, Cabeza de Vaca Granite and possibly Tardugno Granodiorite were intruded during a major compressional event associated with top-to-the-SSW thrusting. This event is most likely related to a frontal collision of the North Patagonian Massif and the southwestern Gondwana margin at around 300. Ma. The Navarrete Plutonic Complex and San Martin pluton were emplaced after that tectonic event, which must have ended by 281. Ma. Previous magmatic, geochronological and paleomagnetic data that suggest close connection of the North Patagonian Massif with the South American Gondwana blocks during the Paleozoic, can be reconciled with a Late Paleozoic collision by a model of a para-autochthonous North Patagonian Massif that rifted away from Gondwana after the Ordovician and collided again in the Late Carboniferous-Early Permian. © 2010 Elsevier B.V. |l eng | |
| 536 | |a Detalles de la financiación: Agencia Nacional de Promoción Científica y Tecnológica | ||
| 536 | |a Detalles de la financiación: This research has been supported by grants PICT-Redes 283 and PICT-1074 from the Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT, Argentina) . Collaboration of Nicolás Celesia, Alejandro D'Odorico and Claudia Zaffarana during the field works is gratefully acknowledged. Our gratitude also is indebted to numerous local owners, workers and inhabitants of the region. Among others we would like to mention Mr. Day, Mr. Matzen, Mrs. Tardugno, Mr. Navarrete, Mr. Robaina, Mr. Aranda and many others for their warm cordiality and for providing unrestricted access to their properties. Comments by J. Meert on a previous version of this manuscript are acknowledged. Thorough reviews by V. Ramos and an anonymous reviewer highly improved the final version. | ||
| 593 | |a Instituto Nacional de Geocronología y Geología Isotópica (INGEIS), CONICET-Universidad de Buenos Aires, Argentina | ||
| 593 | |a Instituto de Geofísica Daniel A. Valencio (INGEODAV), Departamento de Ciencias Geológicas, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina | ||
| 690 | 1 | 0 | |a COLLISION PATAGONIA AND GONDWANA |
| 690 | 1 | 0 | |a LATE PALEOZOIC GRANITOIDS |
| 690 | 1 | 0 | |a MAGNETIC FABRIC |
| 690 | 1 | 0 | |a MICROSTRUCTURES |
| 690 | 1 | 0 | |a NORTH PATAGONIAN MASSIF |
| 690 | 1 | 0 | |a ANISOTROPY OF MAGNETIC SUSCEPTIBILITY |
| 690 | 1 | 0 | |a COMBINED ANALYSIS |
| 690 | 1 | 0 | |a COMPRESSIONAL |
| 690 | 1 | 0 | |a CRUSTAL BLOCK |
| 690 | 1 | 0 | |a FRONTAL COLLISION |
| 690 | 1 | 0 | |a GRANODIORITE |
| 690 | 1 | 0 | |a HIGH TEMPERATURE |
| 690 | 1 | 0 | |a LATE PALEOZOIC |
| 690 | 1 | 0 | |a LATE PERMIAN |
| 690 | 1 | 0 | |a MAGMATISMS |
| 690 | 1 | 0 | |a MAGNETIC FABRICS |
| 690 | 1 | 0 | |a MICRO-STRUCTURAL |
| 690 | 1 | 0 | |a NORTH PATAGONIAN MASSIF |
| 690 | 1 | 0 | |a ORDOVICIAN |
| 690 | 1 | 0 | |a PALEOMAGNETIC DATA |
| 690 | 1 | 0 | |a PALEOZOIC |
| 690 | 1 | 0 | |a PATAGONIA |
| 690 | 1 | 0 | |a PERMIAN |
| 690 | 1 | 0 | |a SOLID STATE DEFORMATION |
| 690 | 1 | 0 | |a STRESS FIELD |
| 690 | 1 | 0 | |a SYSTEMATIC ANALYSIS |
| 690 | 1 | 0 | |a TECTONIC EVENTS |
| 690 | 1 | 0 | |a THIN SECTION |
| 690 | 1 | 0 | |a DEFORMATION |
| 690 | 1 | 0 | |a GEOCHRONOLOGY |
| 690 | 1 | 0 | |a GRANITE |
| 690 | 1 | 0 | |a MAGNETIC ANISOTROPY |
| 690 | 1 | 0 | |a MAGNETIC SUSCEPTIBILITY |
| 690 | 1 | 0 | |a MAGNETISM |
| 690 | 1 | 0 | |a MICROSTRUCTURE |
| 690 | 1 | 0 | |a TUNGSTEN COMPOUNDS |
| 690 | 1 | 0 | |a CARBONIFEROUS |
| 690 | 1 | 0 | |a COLLISION ZONE |
| 690 | 1 | 0 | |a DEFORMATION MECHANISM |
| 690 | 1 | 0 | |a EMPLACEMENT |
| 690 | 1 | 0 | |a GONDWANA |
| 690 | 1 | 0 | |a GRANITOID |
| 690 | 1 | 0 | |a INTEGRATED APPROACH |
| 690 | 1 | 0 | |a MAGMATISM |
| 690 | 1 | 0 | |a MAGNETIC ANISOTROPY |
| 690 | 1 | 0 | |a MAGNETIC FABRIC |
| 690 | 1 | 0 | |a MICROSTRUCTURE |
| 690 | 1 | 0 | |a PALEOMAGNETISM |
| 690 | 1 | 0 | |a PALEOZOIC |
| 690 | 1 | 0 | |a PERMIAN |
| 690 | 1 | 0 | |a PETROGRAPHY |
| 690 | 1 | 0 | |a PATAGONIA |
| 651 | 4 | |a SOUTH AMERICA | |
| 700 | 1 | |a Rapalini, A.E. | |
| 700 | 1 | |a Tomezzoli, R.N. | |
| 773 | 0 | |d 2010 |g v. 494 |h pp. 118-137 |k n. 1-2 |p Tectonophysics |x 00401951 |w (AR-BaUEN)CENRE-81 |t Tectonophysics | |
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| 856 | 4 | 0 | |u https://doi.org/10.1016/j.tecto.2010.09.003 |y DOI |
| 856 | 4 | 0 | |u https://hdl.handle.net/20.500.12110/paper_00401951_v494_n1-2_p118_LopezdeLuchi |y Handle |
| 856 | 4 | 0 | |u https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00401951_v494_n1-2_p118_LopezdeLuchi |y Registro en la Biblioteca Digital |
| 961 | |a paper_00401951_v494_n1-2_p118_LopezdeLuchi |b paper |c PE | ||
| 962 | |a info:eu-repo/semantics/article |a info:ar-repo/semantics/artículo |b info:eu-repo/semantics/publishedVersion | ||
| 963 | |a VARI | ||
| 999 | |c 68579 | ||