A review of the geodynamic evolution of flat slab subduction in Mexico, Peru, and Chile
Por:
Manea, V. C., Manea, M., Ferrari, L., Orozco-Esquivel, T., Valenzuela, R. W., Husker, A., Kostoglodov, V.
Publicada:
16 ene 2017
Resumen:
Subducting plates around the globe display a large variability in terms
of slab geometry, including regions where smooth and little variation in
subduction parameters is observed. While the vast majority of subduction
slabs plunge into the mantle at different, but positive dip angles, the
end-member case of flat-slab subduction seems to strongly defy this rule
and move horizontally several hundreds of kilometers before diving into
the surrounding hotter mantle. By employing a comparative assessment for
the Mexican, Peruvian and Chilean flat-slab subduction zones we find a
series of parameters that apparently facilitate slab flattening. Among
theme, trench roll-back, as well as strong variations and
discontinuities in the structure of oceanic And overriding plates seem
to be the most important However, we were not able to find the necessary
and sufficient conditions that provide an explanation for the formation
of flat slabs in all three subduction zones. In order to unravel the
origin of flat-slab subduction, it is probably necessary a numerical
approach that considers also the influence of surrounding plates, and
their corresponding geometries, on 3D subduction dynamics. (C) 2016
Elsevier B.V. All rights reserved.
Filiaciones:
Manea, V. C.:
Natl Inst Earth Phys, 12 Calugareni Str, Magurele 077125, Ilfov, Romania
Univ Nacl Autonoma Mexico, Ctr Geociencias, Computat Geodynam Lab, Campus Juriquilla, Queretaro 76230, Qro, Mexico
Manea, M.:
Natl Inst Earth Phys, 12 Calugareni Str, Magurele 077125, Ilfov, Romania
Univ Nacl Autonoma Mexico, Ctr Geociencias, Computat Geodynam Lab, Campus Juriquilla, Queretaro 76230, Qro, Mexico
Ferrari, L.:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Computat Geodynam Lab, Campus Juriquilla, Queretaro 76230, Qro, Mexico
Orozco-Esquivel, T.:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Computat Geodynam Lab, Campus Juriquilla, Queretaro 76230, Qro, Mexico
Valenzuela, R. W.:
Univ Nacl Autonoma Mexico, Inst Geofis, Dept Sismol, Mexico City 04510, DF, Mexico
Husker, A.:
Univ Nacl Autonoma Mexico, Inst Geofis, Dept Sismol, Mexico City 04510, DF, Mexico
Kostoglodov, V.:
Univ Nacl Autonoma Mexico, Inst Geofis, Dept Sismol, Mexico City 04510, DF, Mexico
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