Southwest migration of the instantaneous Rivera-Pacific Euler pole since 0.78 Ma
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Resumen
El establecer un polo/vector de Euler que describa con precisión el movimiento actual entre las placas Rivera y Pacífico ha probado ser difícil. Esto es probablemente debido al error sistemático en los datos obtenidos del movimiento y a los errores causados por una migración SW del polo de Euler Rivera-Pacífico durante varios millones de años. Una nueva estimación del polo actual Euler Rivera-Pacífico, es derivada usando sólo las más recientes estructuras batimétricas formadas a lo largo de los límites Rivera-Pacífico. Este polo de Euler (24.62° N, 105.89° W) se localiza significativamente al SW de todos los polos determinados previamente indicando una continua migración (2°) al SW del polo de Euler Rivera-Pacífico durante los últimos 0.78 Ma. Aunque muchas incertidumbres quedan por resolver, esta migración provee una explicación simple a la discrepancia entre el movimiento precalculado de las placas y (1) las direcciones de la parte oriental final de la falla transcurrente Rivera, (2) la morfología extensional de los límites Rivera-Cocos, y (3) la velocidad de movimiento RIV-NA y Cocos-Norte América a través de los límites Rivera-Cocos indicada por las relaciones sismotectónicas.
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