Segmentation and kinematics of the North America-Caribbean plate boundary offshore Hispaniola

We explored the submarine portions of the Enriquillo–Plantain Garden Fault zone (EPGFZ) and the Septentrional–Oriente Fault zone (SOFZ) along the Northern Caribbean plate boundary using high-resolution multibeam echo-sounding and shallow seismic reflection. The bathymetric data shed light on poorly...

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Detalhes bibliográficos
Autores: Leroy, Sylvie, Ellouz-Zimmermann, Nadine, Corbeau, Jordane, Rolandone, Frédérique, Mercier de Lépinay, Bernard, Meyer, Bertrand, Momplaisir, Roberte, Granja Bruña, J. L., Battani, Anne, Baurion, Céline, Burov, Evgueni, Clouard, Valérie, Deschamps, Rémy, Gorini, Christian, Hamon, Youri, Lafosse, Manfred, Leonel, Jottin, Le Pourhiet, Laetitia, Llanes Estrada, Pilar, Loget, Nicolas, Lucazeau, Francis, Pillot, Daniel, Poort, Jeffrey, Tankoo, Kevin R., Cuevas, José-Luis, Alcaide, José-Fernando, Jean Poix, Claude, Muñoz-Martín, A., Mitton, Serge, Rodríguez, Yamil, Schmitz, Julien, Seeber, Leonardo, Carbó Gorosábel, Andrés, Muñoz, Santiago
Formato: artículo
Estado:Versión aceptada para publicación
Fecha de publicación:2015
País:España
Recursos:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/125123
Acesso em linha:http://hdl.handle.net/10261/125123
Access Level:acceso abierto
Palavra-chave:Plate
Kinematics
Strike-slip faults
Haiti
North American-­‐Caribbean plate boundary
Descrição
Resumo:We explored the submarine portions of the Enriquillo–Plantain Garden Fault zone (EPGFZ) and the Septentrional–Oriente Fault zone (SOFZ) along the Northern Caribbean plate boundary using high-resolution multibeam echo-sounding and shallow seismic reflection. The bathymetric data shed light on poorly documented or previously unknown submarine fault zones running over 200 km between Haiti and Jamaica (EPGFZ) and 300 km between the Dominican Republic and Cuba (SOFZ). The primary plate-boundary structures are a series of strike-slip fault segments associated with pressure ridges, restraining bends, step overs and dogleg offsets indicating very active tectonics. Several distinct segments 50–100 km long cut across pre-existing structures inherited from former tectonic regimes or bypass recent morphologies formed under the current strike-slip regime. Along the most recent trace of the SOFZ, we measured a strike-slip offset of 16.5 km, which indicates steady activity for the past ~1.8 Ma if its current GPS-derived motion of 9.8 ± 2 mm a−1 has remained stable during the entire Quaternary.

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