Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates
New Late cretaceous to Recent reconstructions between south America and me oceanic plates in the Pacific basin allow thedivision of the corresponding convergence History into three stages, The convergence parameters for the 72-47 Ma time span suggest the migration of the Farallón-South America-Aluk...
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00044822_v60_n4_p797_Somoza |
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todo:paper_00044822_v60_n4_p797_Somoza2023-10-03T13:58:11Z Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates Somoza, R. Ghidella, M.E. Convergence Late cretaceous-cenozoic South america Cenozoic convergent margin Cretaceous deformation magmatism Nazca plate reconstruction subduction trench triple junction uplift Andes Chile Patagonia South America New Late cretaceous to Recent reconstructions between south America and me oceanic plates in the Pacific basin allow thedivision of the corresponding convergence History into three stages, The convergence parameters for the 72-47 Ma time span suggest the migration of the Farallón-South America-Aluk triple junction from northern Chile (southern Perú?) up to the southern Patagonian Andes. Some deformational and magmatic events in the upper plate could be attributed to subduction of the Farallón-Aluk ridge by those times. The 47-28 Ma stage is characterized by subduction of Farallón plate in most (all?) of the margin. The convergence rate and direction remained almost constant during this stage. The 26-0 Ma stage corresponds to the subduction of Nazca plate beneath most of the South American trench. The beginning of this stage coincides with a strong increase in convergence rate which gradually decreased during the last 10 m.y., whereas the direction of convergence remained rather constant during the entire stage. Variations of subduction rate during this younger stage may be related with some deformational and magmatic events in the upper plate, including the uplift of the Central Andes. © 2005 Asociación Geológica Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00044822_v60_n4_p797_Somoza |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Convergence Late cretaceous-cenozoic South america Cenozoic convergent margin Cretaceous deformation magmatism Nazca plate reconstruction subduction trench triple junction uplift Andes Chile Patagonia South America |
| spellingShingle |
Convergence Late cretaceous-cenozoic South america Cenozoic convergent margin Cretaceous deformation magmatism Nazca plate reconstruction subduction trench triple junction uplift Andes Chile Patagonia South America Somoza, R. Ghidella, M.E. Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates |
| topic_facet |
Convergence Late cretaceous-cenozoic South america Cenozoic convergent margin Cretaceous deformation magmatism Nazca plate reconstruction subduction trench triple junction uplift Andes Chile Patagonia South America |
| description |
New Late cretaceous to Recent reconstructions between south America and me oceanic plates in the Pacific basin allow thedivision of the corresponding convergence History into three stages, The convergence parameters for the 72-47 Ma time span suggest the migration of the Farallón-South America-Aluk triple junction from northern Chile (southern Perú?) up to the southern Patagonian Andes. Some deformational and magmatic events in the upper plate could be attributed to subduction of the Farallón-Aluk ridge by those times. The 47-28 Ma stage is characterized by subduction of Farallón plate in most (all?) of the margin. The convergence rate and direction remained almost constant during this stage. The 26-0 Ma stage corresponds to the subduction of Nazca plate beneath most of the South American trench. The beginning of this stage coincides with a strong increase in convergence rate which gradually decreased during the last 10 m.y., whereas the direction of convergence remained rather constant during the entire stage. Variations of subduction rate during this younger stage may be related with some deformational and magmatic events in the upper plate, including the uplift of the Central Andes. © 2005 Asociación Geológica Argentina. |
| format |
JOUR |
| author |
Somoza, R. Ghidella, M.E. |
| author_facet |
Somoza, R. Ghidella, M.E. |
| author_sort |
Somoza, R. |
| title |
Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates |
| title_short |
Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates |
| title_full |
Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates |
| title_fullStr |
Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates |
| title_full_unstemmed |
Convergence in the western margin of South America during the Cenozoic: Subduction of Nazca, Farallon and Aluk plates |
| title_sort |
convergence in the western margin of south america during the cenozoic: subduction of nazca, farallon and aluk plates |
| url |
http://hdl.handle.net/20.500.12110/paper_00044822_v60_n4_p797_Somoza |
| work_keys_str_mv |
AT somozar convergenceinthewesternmarginofsouthamericaduringthecenozoicsubductionofnazcafarallonandalukplates AT ghidellame convergenceinthewesternmarginofsouthamericaduringthecenozoicsubductionofnazcafarallonandalukplates |
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