An introduction to the Cenozoic tectonics of the Japan arc
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Aún cuando no se conoce con precisión la fecha en que comenzó la apertura del Mar del Japón, ésta probablemente comenzó hace 20 Ma. La deformación del arco japonés entre 18 y 20 Ma hasta hace 15 Ma se llevó a cabo como una respuesta a su cabalgadura sobre la placa Pacífico. La colisión de la placa del Mar de Filipinas contra el SW de Japón (1) detuvo el esparcimiento tanto en el mar de Japón como en la Cuenca de Shikoku hace 15 Ma, (2) formó una junta triple de trincheras frente a las costas del Japón central y (3) dividió el arco en los arcos del SW y NE de Japón. El arco del SW de Japón ha estado sujeto a deformación compresional desde este evento, mientras que en el arco del SW y NE de Japón se llevo a cabo un cambio de deformación compresional a extensional que comenzó durante el Plioceno.
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