Artículo

Melnick, D.; Rosenau, M.; Folguera, A.; Echtler, H. "Neogene tectonic evolution of the Neuquén Andes western flank (37-39°S)" (2006) Special Paper of the Geological Society of America. 407:73-95
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Abstract:

This paper integrates new field observations to summarize the evolution of the 37-39°S segment of the Andean margin during the Neogene period. The western Neuquén Andes represent a transitional segment between the high, broad Central Andes and the low, narrow Patagonian Andes. The Main Cordillera at this latitude was uplifted between 11 and 6 Ma. Since then, extension and transtension has dominated the area. South of 38°S, deformation concentrates along the Liquiñe-Ofqui fault zone, a crustal-scale dextral strike-slip system that accommodates part of the marginparallel component of oblique subduction. The architecture of the volcanic arc is strongly controlled by this fault zone. We differentiate four main tectonic phases: (1) late Oligocene-middle Miocene extension and development of a segmented intra-arc continental rift basin and broad volcanic zone; (2) late Miocene shortening, resulting in uplift, exhumation, and inversion of the former basins and a volcanic gap in the Main Cordillera; (3) Pliocene-early Pleistocene extension of the orogenic structure, reestablishment of the volcanic arc, and transtension along the intra-arc zone; and (4) late Pleistocene-Holocene narrowing of the arc and localized extension-transtension along the axial intra-arc zone. In the Central Andes, shortening has been more or less continuous since the Miocene, whereas in the Neuquén Andes, shortening stopped at ca. 6 Ma, probably related to the increase of the slab angle triggering the extension of the former orogenic structure and the onset of arc-parallel strike-slip faulting. The episodic evolution and migration of volcanism are related to changes in dip of the subducting plate. © 2006 Geological Society of America.

Registro:

Documento: Artículo
Título:Neogene tectonic evolution of the Neuquén Andes western flank (37-39°S)
Autor:Melnick, D.; Rosenau, M.; Folguera, A.; Echtler, H.
Filiación:GeoForschungsZentrum Potsdam, Telegrafenberg, 14473 Potsdam, Germany
Laboratorio de Tectónica Andina, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
Palabras clave:Arc-parallel fault zones; Main cordillera; Tectonic evolution; Western neuquén andes; cordillera; deformation; exhumation; fault zone; faulting; island arc; migration; Miocene; Neogene; subduction; tectonic evolution; transtension; uplift; Andes
Año:2006
Volumen:407
Página de inicio:73
Página de fin:95
DOI: http://dx.doi.org/10.1130/2006.2407(04)
Título revista:Special Paper of the Geological Society of America
Título revista abreviado:Spec. Pap. Geol. Soc. Am.
ISSN:00721077
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00721077_v407_n_p73_Melnick

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Citas:

---------- APA ----------
Melnick, D., Rosenau, M., Folguera, A. & Echtler, H. (2006) . Neogene tectonic evolution of the Neuquén Andes western flank (37-39°S). Special Paper of the Geological Society of America, 407, 73-95.
http://dx.doi.org/10.1130/2006.2407(04)
---------- CHICAGO ----------
Melnick, D., Rosenau, M., Folguera, A., Echtler, H. "Neogene tectonic evolution of the Neuquén Andes western flank (37-39°S)" . Special Paper of the Geological Society of America 407 (2006) : 73-95.
http://dx.doi.org/10.1130/2006.2407(04)
---------- MLA ----------
Melnick, D., Rosenau, M., Folguera, A., Echtler, H. "Neogene tectonic evolution of the Neuquén Andes western flank (37-39°S)" . Special Paper of the Geological Society of America, vol. 407, 2006, pp. 73-95.
http://dx.doi.org/10.1130/2006.2407(04)
---------- VANCOUVER ----------
Melnick, D., Rosenau, M., Folguera, A., Echtler, H. Neogene tectonic evolution of the Neuquén Andes western flank (37-39°S). Spec. Pap. Geol. Soc. Am. 2006;407:73-95.
http://dx.doi.org/10.1130/2006.2407(04)