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Abstract:

The classic example of the not-well-understood rapid change of tectonic plate motion is the increase and then decrease of the convergence rate between the Nazca and South America plates during the past 25-20 m.y. that coincided with the growth of the Andes Mountains. Currently, the decrease in convergence rate is explained either by the increasing load of the Andes or by the appearance of fl at slab segments beneath South America. Here, we present an alternative view based on a thermomechanical self-consistent (gravity driven) model of Nazca plate subduction. We explain the changes in the convergence rate as a natural consequence of the Nazca plate penetration into the transition zone and lower mantle after long-term oblique subduction of the Farallon plate. The model is consistent with seismic tomographic images of the Nazca plate beneath South America. Our model also shows that the presence of the Andes does not signifi cantly affect the convergence rate between the Nazca and South America plates. © 2012 Geological Society of America.

Registro:

Documento: Artículo
Título:Why has the Nazca plate slowed since the Neogene?
Autor:Quinteros, J.; Sobolev, S.V.
Filiación:Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, 14473 Potsdam, Germany
Department of Computer Sciences, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires C1428EGA, Argentina
Institute of Physics of the Earth, Russian Academy of Sciences, Moscow 123995, Russian Federation
Palabras clave:Convergence rates; Lower mantle; Natural consequences; Nazca plate; Neo genes; Oblique subduction; Seismic tomographic images; South America; Tectonic plates; Thermo-mechanical; Transition zones; View-based; Geology; Tomography; Nazca plate; Neogene; plate motion; seismic tomography; subduction zone; transition zone; Andes
Año:2013
Volumen:41
Número:1
Página de inicio:31
Página de fin:34
DOI: http://dx.doi.org/10.1130/G33497.1
Título revista:Geology
Título revista abreviado:Geology
ISSN:00917613
CODEN:GLGYB
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00917613_v41_n1_p31_Quinteros

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Citas:

---------- APA ----------
Quinteros, J. & Sobolev, S.V. (2013) . Why has the Nazca plate slowed since the Neogene?. Geology, 41(1), 31-34.
http://dx.doi.org/10.1130/G33497.1
---------- CHICAGO ----------
Quinteros, J., Sobolev, S.V. "Why has the Nazca plate slowed since the Neogene?" . Geology 41, no. 1 (2013) : 31-34.
http://dx.doi.org/10.1130/G33497.1
---------- MLA ----------
Quinteros, J., Sobolev, S.V. "Why has the Nazca plate slowed since the Neogene?" . Geology, vol. 41, no. 1, 2013, pp. 31-34.
http://dx.doi.org/10.1130/G33497.1
---------- VANCOUVER ----------
Quinteros, J., Sobolev, S.V. Why has the Nazca plate slowed since the Neogene?. Geology. 2013;41(1):31-34.
http://dx.doi.org/10.1130/G33497.1