Morphotectonics of the central Muertos thrust belt and Muertos Trough (northeastern Caribbean)

Granja-Bruña, José Luis; Brink, Uri S. ten; Carbó-Gorosabel, A.; Muñoz-Martı́n, A.; Ballesteros, M.

doi:10.1016/j.margeo.2009.03.010

Cited by 41 publications

(48 citation statements)

References 54 publications

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“…Their bounding faults attain 10-20 km in length and are segmented with transverse ramps developed at relay areas. The maximum throw calculated from fault scarps is about 75 m. When represented in a length versus strike diagram, line scarps oriented in a prominent WNW set and a subordinate ENE set, are in good agreement with field measurements of 540 fractures, which are grouped into WNW, NNE and ENE sets.Sidescan imagery, seismic profiles, and structural mapping (Mann et al, 2005a;ten Brink et al, 2009;Chaytor and ten Brink, 2010; and this study) indicate that WNW to NW-trending extensional structures are developed in Eastern Hispaniola, the Mona Passage and Western Puerto Rico areas.The interpreted section of the MCS-55 seismic reflection profile (Chaytor and ten Brink, 2010) shows the western continuation off-shore of the Desecheo Ridge fault in western Puerto Rico. In this profile, high-angle extensional faults cut late Oligocene-Pliocene carbonate platform deposits and syn-tectonic recent sediments filling half-grabens.…”

supporting

confidence: 52%

Geometry, kinematics, paleostress analysis and tectonic model of the extensional fault system deforming the Plio-Pleistocene reefal limestone in southeastern Dominican Republic

García-Senz¹,

Viruete²,

Pérez-Estaún³

2017

Bol. geol. min.

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y modelo tectónico del sistema de fallas extensionales que deforma a las calizas PlioPleistocenas en el sureste de la República Dominicana. Boletín Geológico y Minero, 128 (3): 695-714 ISSN: 0366-0176 DOI: 10.21701/bolgeomin.128.3.009 695 Geometría, cinemática, paleoesfuerzos y modelo tectónico del sistema de fallas extensionales que deforma a las calizas Plio-Pleistocenas en el sureste de la República Dominicana J. García-Senz (1) , J. Escuder-Viruete (1) y A. Pérez-Estaún (2) (1) Instituto Geológico y Minero de España, La Calera 1, 28760 Tres Cantos, Madrid, Spain jesus.garcia@igme.es; j.escuder@igme.es (2) Instituto Ciencias Tierra Jaume Almera-CSIC, Lluís Solé Sabarís s/n, 08028 Barcelona, Spain andres@ija.csic.es RESUMENSe describe un sistema de fallas extensivas de escala regional orientadas NO-SE, NNO-SSE y ENE-OSO que produce un relieve tectónico en semigrabens en las formaciones arrecifales emergidas Plio-Pleistocenas en el sureste de la República Dominicana. Estas fallas constituyen la continuación de un sistema de fallas previamente reconocido en el oeste de Puerto Rico y el Pasaje de la Mona. El análisis de paleoesfuerzos en las fallas que cortan a la caliza del Plioceno permite establecer un esfuerzo mínimo s3 subhorizontal de dirección NE-SO, que cambia a SSO en las fallas que cortan a calizas del Pleistoceno, gradando entre una fracturación normal pura a normal direccional. En contraste, la inversión de los mecanismos focales de los terremotos profundos, intermedios y someros proporciona mecanismos inversos, en dirección y más raramente normales. La extensión en la parte alta de la corteza Caribeña está acompañada de movimientos verticales de elevación y subsidencia de la plataforma de coral en el post-Plioceno. Estos movimientos se han modelado como una placa elástica rota flexionada hacia la fosa e integrado en un modelo más general que incorpora extensión por necking en la lámina Atlántica que subduce. Sin embargo, la actuación de un único mecanismo flexural difícilmente explica la extensión regional observada. Esta última se atribuye mejor a un proceso de rifting difuso dentro del bloque de Puerto Rico-La Española, tal vez causada por la continuidad a baja velocidad del proceso de rotación levógira de Puerto Rico. et al., 2007). The boundary between both plates, known as the Northern Caribbean plate boundary zone (Mann et al., 2002), is dominated by left-lateral motion, collision, and oblique subduction of the North American plate beneath the Caribbean plate. Neogene and Quaternary rocks located in southeastern Hispaniola allow us to study the recent deformations developed in the Caribbean-North America plate boundary zone. In this zone, regional to meso-scale faults are widely represented. These structures are normal to oblique-normal faults with WNW-ESE mean strike and steep dips, affecting up to Quaternary carbonate deposits of the Haitises and Isabela Formations (Braga et al., 2011). Faults cut the 65-90 m raised coral-reef platform (Pliocene?-Pleistocene) that form the bulk of...

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supporting

confidence: 52%

Geometry, kinematics, paleostress analysis and tectonic model of the extensional fault system deforming the Plio-Pleistocene reefal limestone in southeastern Dominican Republic

García-Senz¹,

Viruete²,

Pérez-Estaún³

2017

Bol. geol. min.

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“…Van Gestel et al (1998) have proposed that extension of Mona Passage is accommodated by two rifts, Yuma on the SW side of the passage and Cabo Rojo on the SE. The Yuma basin appears as a significant depositional basin on the seismic reflection profiles without clearly defined bounding faults, and may be an isolated backarc-style basin, related to compression along the Muertos Trough (Granja Bruna et al, 2009). The site of the proposed Cabo Rojo rift does not appear to be a significant structural feature or depositional center.…”

Section: Central and Western Areamentioning

confidence: 91%

“…3). To the southwest of Isla de Mona is Yuma basin, a partially sediment filled bathymetric low which has been interpreted by van Gestel et al (1998van Gestel et al ( , 1999 to be a rift basin, an interpretation which also was not confirmed by multibeam and seismic data (Granja Bruna et al, 2009).…”

Section: Morphology and Geologymentioning

confidence: 93%

“…The apparent dips of the carbonate layers vary in direction and angle and do not form a clear arch with a defined hinge. Although in places there is the appearance of a northward and southward seaward dip of the platform, it is most likely due to the well-developed block-faulting present throughout the passage, coupled with the collapse of the carbonate platform along its northern edge (ten Brink, 2005) and extensional strains at the hinterland of the Muertos thrust wedge (Granja Bruna et al, 2009). …”

Section: Single-phase Extensionmentioning

confidence: 99%

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Extension in Mona Passage, Northeast Caribbean

Chaytor

Brink

2010

Tectonophysics

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As shown by the recent M w 7.0 Haiti earthquake, intra-arc deformation, which accompanies the subduction process, can present seismic and tsunami hazards to nearby islands. Spatially-limited diffuse tectonic deformation within the Northeast Caribbean Plate Boundary Zone likely led to the development of the submerged Mona Passage between Puerto Rico and the Dominican Republic. GPS geodetic data and a moderate to high level of seismicity indicate that extension within the region is ongoing. Newly-collected high-resolution multibeam bathymetry and multi-channel seismic reflection profiles and previouslycollected samples are used here to determine the tectonic evolution of the Mona Passage intra-arc region. The passage is floored almost completely by Oligocene-Pliocene carbonate platform strata, which have undergone submarine and subaerial erosion. Structurally, the passage is characterized by W-to NNWtrending normal faults that offset the entire thickness of the Oligo-Pliocene carbonate platform rocks. The orientation of these faults is compatible with the NE-oriented extension vector observed in GPS data. Fault geometry best fits an oblique extension model rather than previously proposed single-phase, poly-phase, bending-moment, or rotation extension models. The intersection of these generally NW-trending faults in Mona Passage with the N-S oriented faults of Mona Canyon may reflect differing responses of the brittle upper-crust, along an arc-forearc rheological boundary, to oblique subduction along the Puerto Rico trench. Several faults within the passage, if ruptured completely, are long enough to generate earthquakes with magnitudes on the order of M w 6.5-7.Published by Elsevier B.V.

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“…Moreover, this is an easily accessible region in which to study the continuity of seismic faults offshore and to try to understand the transitions between strike-slip and convergent tectonic regimes. Interest in the region has led to several studies that have improved scientists' knowledge of subduction zone tectonics and earthquake and tsunami hazard assessments [Mann et al, 2002;ten Brink et al, 2006Grindlay et al, 2005;Manaker et al, 2008;Granja Bruña et al, 2009;Mondziel et al, 2010].…”

Section: July 2010 Pages 261-268mentioning

confidence: 99%

Exploring Active Tectonics in the Dominican Republic

et al. 2010

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The devastating 12 January 2010 Haiti earthquake (M = 7.0), which killed an estimated 230,000 people and caused extensive damage to homes and buildings, drew attention to the crucial need for improved knowledge of the active tectonics of the Caribbean region. But even before this disastrous event, interest in understanding the active and complex northeastern Caribbean plate boundary had been increasing, because this region has experienced significant seismic activity during the past century and has an extensively documented record of historical seismicity and tsunamis. Moreover, this is an easily accessible region in which to study the continuity of seismic faults offshore and to try to understand the transitions between strike‐slip and convergent tectonic regimes. Interest in the region has led to several studies that have improved scientists' knowledge of subduction zone tectonics and earthquake and tsunami hazard assessments [Mann et al., 2002; ten Brink et al., 2006, 2009; Grindlay et al., 2005; Manaker et al., 2008; Granja Bruña et al., 2009; Mondziel et al., 2010].

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Morphotectonics of the central Muertos thrust belt and Muertos Trough (northeastern Caribbean)

Cited by 41 publications

References 54 publications

Geometry, kinematics, paleostress analysis and tectonic model of the extensional fault system deforming the Plio-Pleistocene reefal limestone in southeastern Dominican Republic

Geometry, kinematics, paleostress analysis and tectonic model of the extensional fault system deforming the Plio-Pleistocene reefal limestone in southeastern Dominican Republic

Extension in Mona Passage, Northeast Caribbean

Exploring Active Tectonics in the Dominican Republic

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