The metamorphic complexes of the Patagonian and Fuegian Andes
The Patagonian and Fuegian Andes are made up in part by late Paleozoic to Mesozoic metamorphic complexes. The mostly low grade late Paleozoic Eastern Andes Metamorphic Complex (EAMC) crops out to the East of the Meso-Cenozoic South Patagonian batholith (SPB), which intruded the metamorphic complexes...
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| Format: | Article |
| Language: | English |
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Universitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)
2008-03-01
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| Series: | Geologica Acta |
| Subjects: | |
| Online Access: | https://revistes.ub.edu/index.php/GEOACTA/article/view/1919 |
| _version_ | 1797654653470507008 |
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| author | F. E. I. HERVÉ ALLAMAND M. CALDERÓN V. FAÚNDEZ |
| author_facet | F. E. I. HERVÉ ALLAMAND M. CALDERÓN V. FAÚNDEZ |
| author_sort | F. E. I. HERVÉ ALLAMAND |
| collection | DOAJ |
| description | The Patagonian and Fuegian Andes are made up in part by late Paleozoic to Mesozoic metamorphic complexes. The mostly low grade late Paleozoic Eastern Andes Metamorphic Complex (EAMC) crops out to the East of the Meso-Cenozoic South Patagonian batholith (SPB), which intruded the metamorphic complexes. The protholit of the EAMC was likely deposited in a passive margin setting and at the Puerto Edén area underwent Late Jurassic sillimanite grade and migmatite local metamorphic conditions. It is suspected, but not proven, that the Cordillera Darwin Metamorphic Complex is a higher grade metamorphic complex equivalent of the EAMC. West of the SPB, paleo subduction complexes occur and are represented by the allochtonous Madre de Dios terrane. This terrane is composed of the ocean floor lithologies of the Denaro Complex topped by the Tarlton limestones that represent a guyot assemblage. The low grade continent derived Duque de York complex was deposited down top of the ocean floor lithologies. Further west, the blueschist bearing Middle Jurassic Diego de Almagro Complex, with psammopelitic, mafic and siliceous volcanic rock protoliths, evolved deep in a subduction zone during the Cretaceous. The possibility that the Antarctic Peninsula was located west of the present margin of South America is discussed. |
| first_indexed | 2024-03-11T17:02:38Z |
| format | Article |
| id | doaj.art-bcbbf7dcd6514cc5ab81b62032a97cdc |
| institution | Directory Open Access Journal |
| issn | 1696-5728 |
| language | English |
| last_indexed | 2024-03-11T17:02:38Z |
| publishDate | 2008-03-01 |
| 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-bcbbf7dcd6514cc5ab81b62032a97cdc2023-10-20T07:14:14ZengUniversitat de Barcelona (UB), Geociències Barcelona (Geo3BCN), Institut de Diagnosi Ambiental i Estudis de l'Aigua (IDAEA), Universitat Autònoma de Barcelona (UAB)Geologica Acta1696-57282008-03-016110.1344/105.000000240The metamorphic complexes of the Patagonian and Fuegian AndesF. E. I. HERVÉ ALLAMAND0M. CALDERÓN1V. FAÚNDEZ2Departamento de Geología, Universidad de ChilePlaza Ercilla 803, Casilla 13518, Correo 21, Santiago, ChileDepartamento de Geología, Universidad de ChilePlaza Ercilla 803, Casilla 13518, Correo 21, Santiago, ChileDepartamento de Geología, Universidad de ChilePlaza Ercilla 803, Casilla 13518, Correo 21, Santiago, ChileThe Patagonian and Fuegian Andes are made up in part by late Paleozoic to Mesozoic metamorphic complexes. The mostly low grade late Paleozoic Eastern Andes Metamorphic Complex (EAMC) crops out to the East of the Meso-Cenozoic South Patagonian batholith (SPB), which intruded the metamorphic complexes. The protholit of the EAMC was likely deposited in a passive margin setting and at the Puerto Edén area underwent Late Jurassic sillimanite grade and migmatite local metamorphic conditions. It is suspected, but not proven, that the Cordillera Darwin Metamorphic Complex is a higher grade metamorphic complex equivalent of the EAMC. West of the SPB, paleo subduction complexes occur and are represented by the allochtonous Madre de Dios terrane. This terrane is composed of the ocean floor lithologies of the Denaro Complex topped by the Tarlton limestones that represent a guyot assemblage. The low grade continent derived Duque de York complex was deposited down top of the ocean floor lithologies. Further west, the blueschist bearing Middle Jurassic Diego de Almagro Complex, with psammopelitic, mafic and siliceous volcanic rock protoliths, evolved deep in a subduction zone during the Cretaceous. The possibility that the Antarctic Peninsula was located west of the present margin of South America is discussed.https://revistes.ub.edu/index.php/GEOACTA/article/view/1919Metamorphic complexesLate PaleozoicJurassicBlueschistsSubduction Zone. |
| spellingShingle | F. E. I. HERVÉ ALLAMAND M. CALDERÓN V. FAÚNDEZ The metamorphic complexes of the Patagonian and Fuegian Andes Geologica Acta Metamorphic complexes Late Paleozoic Jurassic Blueschists Subduction Zone. |
| title | The metamorphic complexes of the Patagonian and Fuegian Andes |
| title_full | The metamorphic complexes of the Patagonian and Fuegian Andes |
| title_fullStr | The metamorphic complexes of the Patagonian and Fuegian Andes |
| title_full_unstemmed | The metamorphic complexes of the Patagonian and Fuegian Andes |
| title_short | The metamorphic complexes of the Patagonian and Fuegian Andes |
| title_sort | metamorphic complexes of the patagonian and fuegian andes |
| topic | Metamorphic complexes Late Paleozoic Jurassic Blueschists Subduction Zone. |
| url | https://revistes.ub.edu/index.php/GEOACTA/article/view/1919 |
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