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Article Dans Une Revue Terra Nova Année : 1997

EPR microplates, a model for the Oman Ophiolite

Francoise Boudier
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Benoit Ildefonse
David Jousselin

Résumé

Structural mapping in the Southern half of the Oman ophiolite has revealed a palaeoridge organization with similarities to an EPR microplate, forming in superfast spreading conditions. A NW‐trending propagator was rapidly opening in a lithosphere no more than 1 Myr older and itself created in a NE‐SW ridge system. The NW‐trending propagator, underlined by small mantle diapirs, was active or dying when detached as part of a future ophiolite. Local thrusting of the future ophiolite was also initiated very early, between 1 and 5 Myr after ridge accretion; it was accompanied by a 40° rotation within this time lapse. Such an activity supports the comparison of the Oman palaeoridge system with an oceanic microplate, and provides evidence to suggest the existence of thrusts at active microplates.

Dates et versions

hal-02109314 , version 1 (24-04-2019)

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Citer

Francoise Boudier, Adolphe Nicolas, Benoit Ildefonse, David Jousselin. EPR microplates, a model for the Oman Ophiolite. Terra Nova, 1997, 9 (2), pp.79-82. ⟨10.1111/j.1365-3121.1997.tb00007.x⟩. ⟨hal-02109314⟩
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