Morphostructure at the junction between the Beata ridge and the Greater Antilles island arc (offshore Hispaniola southern slope)

Granja-Bruña, José Luis; Carbó-Gorosabel, A.; Estrada, P.; Muñoz-Martı́n, A.; Brink, Uri S. ten; Ballesteros, M.; Druet, M.; Pazos, Antonio

doi:10.1016/j.tecto.2014.02.001

Cited by 33 publications

(37 citation statements)

References 55 publications

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“…This result should prompt additional geological work to try to identify paleoearthquakes in this supposedly aseismic region. Finally, the model indicates significant oblique shortening across the western part of the Muertos trough (∼5–6 mm/yr), consistent with active compressional structures well imaged by offshore seismic reflection data [ Ladd et al , ; Granja Bruña et al , ].…”

Section: Discussionmentioning

confidence: 76%

Current block motions and strain accumulation on active faults in the Caribbean

et al. 2015

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The Caribbean plate and its boundaries with north and south America, marked by subduction and large intra-arc strike-slip faults, are a natural laboratory for the study of strain partitioning and interseismic plate coupling in relation to large earthquakes. Here we use most of the available campaign and continuous GPS measurements in the Caribbean to derive a regional velocity field expressed in a consistent reference frame. We use this velocity field as input to a kinematic model where surface velocities results from the rotation of rigid blocks bounded by locked faults accumulating interseismic strain, while allowing for partial locking along the Lesser Antilles, Puerto Rico, and Hispaniola subduction. We test various block geometries, guided by previous regional kinematic models and geological information on active faults. Our findings refine a number of previously established results, in particular slip rates on the strike-slip faults systems bounding the Caribbean plate to the north and south, and the kinematics of the Gonave microplate. Our much-improved GPS velocity field in the Lesser Antilles compared to previous studies does not require the existence of a distinct Northern Lesser Antilles block and excludes more than 3 mm/yr of strain accumulation on the Lesser Antilles-Puerto Rico subduction plate interface, which appears essentially uncoupled. The transition from a coupled to an uncoupled subduction coincides with a transition in the long-term geological behavior of the Caribbean plate margin from compressional (Hispaniola) to extensional (Puerto Rico and Lesser Antilles), a characteristics shared with several other subduction systems.

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Section: Discussionmentioning

confidence: 76%

Current block motions and strain accumulation on active faults in the Caribbean

et al. 2015

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“…The CSE Quaternary basin is bounded to the north by the frontal thrusts of the southwestward verging Haiti fold and thrust belt (HFTB) and to the south by the southwestward dipping thrusts that limit and uplift the oceanic crust (Massif de la Selle‐Sierra de Bahoruco, MSB, Figure ) ( Granja Bruña et al . [], Mann et al . [], Pubellier et al .…”

Section: Seismotectonic Setting Of the 2010 Haiti Earthquakementioning

confidence: 99%

“…The fold and thrust belts (MSB and HFTB) have been active since the Miocene [ Mann et al ., ], controlling the ongoing growth of the highest relief of Haiti (i.e., Pic la Selle; Figure b). They extend offshore to the west, forming the Gonâve Island [ Mann et al ., ], and to the east, structuring the Muertos Trough and thrust belt [ Granja Bruña et al ., ] (Figure a). In the Gonâve basin, the most recent sedimentary layers are folded and crosscut by thrusts that reach the seafloor, indicating late Quaternary activity [ Mann et al ., ].…”

Section: Seismotectonic Setting Of the 2010 Haiti Earthquakementioning

confidence: 99%

“…Tectonic setting and active faulting in Haiti. (a) Major anticlines (lines with arrows, dashed white: growing and grey: older), active thrusts (black), and strike‐slip faults (EPGF and SF: in red) from this study [ Mann et al ., ; Pubellier et al ., ; Mauffret and Leroy , ; Granja Bruña et al ., ]. Blue (1): rigid Beata oceanic crust block.…”

Section: Introductionmentioning

confidence: 99%

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Seismotectonics of southern Haiti: A new faulting model for the 12 January 2010M7.0 earthquake

Fleur

Feuillet

Grandin

et al. 2015

Geophysical Research Letters

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The prevailing consensus is that the 2010 Mw7.0 Haiti earthquake left the Enriquillo‐Plantain Garden strike‐slip fault (EPGF) unruptured but broke unmapped blind north dipping thrusts. Using high‐resolution topography, aerial images, bathymetry, and geology, we identified previously unrecognized south dipping NW‐SE striking active thrusts in southern Haiti. One of them, Lamentin thrust, cuts across the crowded city of Carrefour, extends offshore into Port‐au‐Prince Bay, and connects at depth with the EPGF. We propose that both faults broke in 2010. The rupture likely initiated on the thrust and propagated further along the EPGF due to unclamping. This scenario is consistent with geodetic, seismological, and field data. The 2010 earthquake increased the stress toward failure on the unruptured segments of the EPGF and on neighboring thrusts, significantly increasing the seismic hazard in the Port‐au‐Prince urban area. The numerous active thrusts recognized in that area must be considered for future evaluation of the seismic hazard.

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“…1; Pindell and Barrett, 1990). Moreover, during the Miocene, the CLIP collides with the southwest of Hispaniola (Calmus, 1983;Pindell and Barrett, 1990;Granja Bruña et al, 2014) and a compressive deformation begins to develop in Hispaniola (Haitian fold-and-thrust belt, Pubellier et al, 2000). The pre-existing structures of Jamaica are overprinted by left-lateral transcurrent tectonics from the middle Miocene onwards (Mann et al, 1985;Lewis and Draper, 1990;James-Williamson et al, 2014).…”

Section: Introductionmentioning

confidence: 99%