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...
| Principais autores: | , , , , , |
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| Formato: | Artigo |
| Idioma: | English |
| Publicado em: |
Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2011-01-01
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| coleção: | Geologica Acta |
| Assuntos: | |
| Acesso em linha: | https://revistes.ub.edu/index.php/GEOACTA/article/view/2062 |
| _version_ | 1827788048245456896 |
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| author | A.E. RAPALINI M.G. LÓPEZ DE LUCHI C. MARTÍNEZ DOPICO F.G. LINCE KLINGER M.E. GIMÉNEZ PATRICIA MARTÍNEZ |
| author_facet | A.E. RAPALINI M.G. LÓPEZ DE LUCHI C. MARTÍNEZ DOPICO F.G. LINCE KLINGER M.E. GIMÉNEZ PATRICIA MARTÍNEZ |
| author_sort | A.E. RAPALINI |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-03-11T17:01:54Z |
| format | Article |
| id | doaj.art-02e901b83f2d4b7e8efe26aba67fa4c4 |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:01:54Z |
| publishDate | 2011-01-01 |
| publisher | Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB) |
| record_format | Article |
| series | Geologica Acta |
| spelling | doaj.art-02e901b83f2d4b7e8efe26aba67fa4c42023-10-20T07:16:05ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282011-01-0184Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian MassifA.E. RAPALINI0M.G. LÓPEZ DE LUCHI1C. MARTÍNEZ DOPICO2F.G. LINCE KLINGER3M.E. GIMÉNEZ4PATRICIA MARTÍNEZ5Instituto de Geofísica Daniel A.Valencio, Departamento de Ciencias Geológicas, FCEyN, Universidad de Buenos Aires, CONICET. Pabellón 2, Ciudad Universitaria, Buenos Aires, Argentina.Instituto de Geocronología y Geología Isotópica (INGEIS), Universidad de Buenos Aires-CONICETInstituto de Geofísica Daniel A.Valencio, Departamento de Ciencias Geológicas, FCEyN, Universidad de Buenos Aires, CONICET. Pabellón 2, Ciudad Universitaria, BuenosInstituto Sismológico Volponi, Universidad Nacional de San Juan, CONICETInstituto de Geocronología y Geología Isotópica (INGEIS), Universidad de Buenos Aires-CONICETInstituto de Geocronología y Geología Isotópica (INGEIS), Universidad de Buenos Aires-CONICETThe 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.https://revistes.ub.edu/index.php/GEOACTA/article/view/2062PatagoniaGondwanaLate PaleozoicCollisionMagmatism |
| spellingShingle | A.E. RAPALINI M.G. LÓPEZ DE LUCHI C. MARTÍNEZ DOPICO F.G. LINCE KLINGER M.E. GIMÉNEZ PATRICIA MARTÍNEZ Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif Geologica Acta Patagonia Gondwana Late Paleozoic Collision Magmatism |
| title | Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif |
| title_full | Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif |
| title_fullStr | Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif |
| title_full_unstemmed | Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif |
| title_short | Did Patagonia collide with Gondwana in the Late Paleozoic? Some insights from a multidisciplinary study of magmatic units of the North Patagonian Massif |
| title_sort | did patagonia collide with gondwana in the late paleozoic some insights from a multidisciplinary study of magmatic units of the north patagonian massif |
| topic | Patagonia Gondwana Late Paleozoic Collision Magmatism |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/2062 |
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