Active tectonics of the north-central Caribbean: Oblique collision, strain partitioning, and opposing subducted slabs

Dolan, James F.; Mullins, Henry T.; Wald, David J.

doi:10.1130/0-8137-2326-4.1

Cited by 83 publications

(113 citation statements)

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“…Some workers have argued that Muertos Trough subduction ceased around the late Eocene (Burke et al, 1978) or Oligocene (Malfait and Dinkelman, 1972). On the other hand, Byrne et al (1985), Dillon et al (1996) and Dolan et al (1998) suggest active subduction processes from seismological data. Byrne et al (1985) interpreted the June 24, 1984, Ms = 6.7 San Pedro Basin event (black star in Fig.…”

Section: Regional Setting Of the Muertos Marginmentioning

confidence: 99%

“…Interpretations of the gravity (Worzel and Ewing, 1954), seismic reflection (Matthews and Holcombe, 1974;Ladd et al, 1977;BijuDuval et al, 1982) and seismologic data (Byrne et al, 1985Dillon et al, 1996;Dolan et al, 1998;Mann et al, 2002) have suggested that the Caribbean plate was possibly being underthrusted or subducted under Puerto Rico and Hispaniola. Seismic data show that reflectors corresponding to the Venezuelan (vb-2na, vb-2nb, vb-1nb and vb-1nc profiles) and from EW9501 cruise (1292 profile).…”

Section: Regional Setting Of the Muertos Marginmentioning

confidence: 99%

“…1), to be a nearly pure thrust motion along a plane dipping 9°northwards at 32 km focal depth. Dillon et al (1996) and Dolan et al (1998) estimated the three-dimensional geometry of a 15°northward-dipping zone of seismicity associated with the northward underthrusting of Caribbean lithosphere along the Muertos Trough. This strongly suggests that the Muertos Trough is an active convergent boundary.…”

Section: Regional Setting Of the Muertos Marginmentioning

confidence: 99%

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

et al. 2009

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Section: Regional Setting Of the Muertos Marginmentioning

confidence: 99%

Section: Regional Setting Of the Muertos Marginmentioning

confidence: 99%

Section: Regional Setting Of the Muertos Marginmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2009

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“…Although globally not common, isolated cases exist where subducting plates come into contact, for example, in Espanola [Dolan et al, 1998] and in Ontong-Java [Mann and Taira, 2004]; but the interaction of PHS and PAC under Kanto is clearly more extensive and better delineated [Noguchi, 1998;Sekiguchi, 2001;Sato et al, 2005]. The PHS moved in a northerly direction until about 2 my ago [Seno and Maruyama, 1984] or as recent as 1 my [Yamaji, 2000] when it changed to a WNW direction.…”

Section: Introductionmentioning

confidence: 99%

Interaction between two subducting plates under Tokyo and its possible effects on seismic hazards

Okaya

Sato

et al. 2007

Geophysical Research Letters

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Underneath metropolitan Tokyo the Philippine Sea plate (PHS) subducts to the north on top of the westward subducting Pacific plate (PAC). New, relatively high‐resolution tomography images the PHS as a well‐defined subduction zone under western Kanto Plain. As PAC shoals under eastern Kanto, the PHS lithosphere is being thrusted into an increasingly tighter space of the PAC‐Eurasian mantle wedge. As a result, zones of enhanced seismicity appear under eastern Kanto at the top of PHS, internal to PHS and also at its contact with PAC. These zones are located at depths greater than the causative fault of the disastrous 1923 Great Tokyo “megathrust” earthquake, in the vicinity of several well‐located historical, damaging (M6 and M7) earthquakes. Thus a rather unique interaction between subducting plates under Tokyo may account for additional seismic hazards in metropolitan Tokyo.

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“…Masson and Scanlon (1991;see also Whetten 1966;Donnelly 1966) provide useful indications of local post-Oligocene extensional shelf faulting (associated with the northern margin of the extensional Virgin Islands Basin and continuing northeast through the Anegada Passage) that is active to the present day; however, they do not discuss mechanisms for tectonic tilting or how the movements may be controlling (or have controlled) deposition and erosion in the recent geologic past. Dolan et al (1998, and similar studies) likewise do not address St. Croix but focus on the area of the northern Hispaniola slope and northwestern Puerto Rico. Our findings thus constitute the first quantitative estimates of Late Pleistocene tectonism of the St. Croix area.…”

Section: Coral Reefsmentioning

confidence: 99%

Last interglacial reef limestones, northeastern St. Croix, US Virgin Islands—evidence of tectonic tilting and subsidence since MIS 5.5

2011

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Most last interglacial (MIS 5.5) coral reef deposits in the Caribbean are emergent. However, in St. Croix, these are found mainly at depth, underneath Holocene material and confirmed by TIMS U-Th dated corals from eight cores through Holocene reefs. The only emergent MIS 5.5 marine deposit peaks at ?1.5 m MSL at the northwestern end of the island. The Late Pleistocene surface decreases at least 9.25 m (based on reef crest elevations) in elevation over 15 km along a 0.62 m/km eastward (alongshore) slope. Neither differential erosion nor a naturally sloping deposit is likely, thus the directional elevation decrease requires the influence of tectonic processes. Platform tilting or differential subsidence increasing in rate to the east probably operated both during and since the last interglacial and created progressively greater accommodation space for increasingly thicker overlying Holocene reefs in an eastward direction. Rates of subsidence since MIS 5.5 increase from west to east, from 0.02 mm/year to 0.1 mm/year, assuming a MIS 5.5 ?6-m sea level and ?4 m initial reef elevation. St. Croix's association with extensional shelf faulting from the northern part of the Virgin Islands Basin, the Anegada Fault to the east and the Puerto Rico Trench to the north may be significant in terms of identifying mechanisms for, or past events resulting in, directional tilting. Identification of differential elevations of MIS 5.5 reefs adds substantially to the information on Late Quaternary tectonism of the area.

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Active tectonics of the north-central Caribbean: Oblique collision, strain partitioning, and opposing subducted slabs

Cited by 83 publications

References 0 publications

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

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

Interaction between two subducting plates under Tokyo and its possible effects on seismic hazards

Last interglacial reef limestones, northeastern St. Croix, US Virgin Islands—evidence of tectonic tilting and subsidence since MIS 5.5

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