DOI: 10.1016/j.tecto.2020.228322
论文题名: Along-strike segmentation in the northern Caribbean plate boundary zone (Hispaniola sector): Tectonic implications
作者: Rodríguez-Zurrunero A. ; Granja-Bruña J.L. ; Muñoz-Martín A. ; Leroy S. ; ten Brink U. ; Gorosabel-Araus J.M. ; Gómez de la Peña L. ; Druet M. ; Carbó-Gorosabel A.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 776 语种: 英语
中文关键词: Caribbean plate
; Collision
; Hispaniola
; Segmentation
; Strain partitioning
; Subduction
英文关键词: Bathymetry
; Earthquakes
; Image segmentation
; Plates (structural components)
; Seismic waves
; Collision
; Hispaniola
; Multi-channel seismic
; Regional scale analysis
; Strain partitioning
; Strike-slip earthquakes
; Subduction
; Tectonic implications
; Faulting
; Caribbean plate
; continental collision
; plate boundary
; plate convergence
; segmentation
; strain partitioning
; subduction
; tectonic evolution
; tectonic setting
; Cuba
; Puerto Rico
英文摘要: The North American (NOAM) plate converges with the Caribbean (CARIB) plate at a rate of 20.0 ± 0.4 mm/yr. towards 254 ± 1°. Plate convergence is highly oblique (20–10°), resulting in a complex crustal boundary with along-strike segmentation, strain partitioning and microplate tectonics. We study the oblique convergence of the NOAM and CARIB plates between southeastern Cuba to northern Puerto Rico using new swath multibeam bathymetry data and 2D multi-channel seismic profiles. The combined interpretation of marine geophysical data with the seismicity and geodetic data from public databases allow us to perform a regional scale analysis of the shallower structure, the seismotectonics and the slab geometry along the plate boundary. Due to differential rollback between the NOAM oceanic crust north of Puerto Rico and the relative thicker Bahamas Carbonate Province crust north of Hispaniola a slab tear is created at 68.5°W. The northern margin of Puerto Rico records the oblique high-dip subduction and rollback of the NOAM plate below the island arc. Those processes have resulted in a forearc transpressive tectonics (without strain partitioning), controlled by the Septentrional-Oriente Fault Zone (SOFZ) and the Bunce Fault Zone (BFZ). Meanwhile, in the northern margin of Hispaniola, the collision of the Bahamas Carbonate Province results in high plate coupling with strain partitioning: SOFZ and Northern Hispaniola Deformed Belt (NHDB). In the northern Haitian margin, compression is still relevant since seismicity is mostly associated with the deformation front, whereas strike slip earthquakes are hardly anecdotal. Although in Hispaniola intermediate-depth seismicity should disappear, diffuse intermediate-depth hypocenter remains evidencing the presence of remnant NOAM subducted slab below central and western Hispaniola. Results of this study improve our understanding of the active tectonics in the NE Caribbean that it is the base for future assessment studies on seismic and tsunamigenic hazard. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170698
Appears in Collections: 气候变化与战略
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作者单位: Applied Tectonophysics Group, Department of Geodynamics, Stratigraphy and Paleontology, Universidad Complutense, Madrid, Spain; Instituto de Geociencias (UCM, CSIC), Madrid, Spain; Sorbonne Université, INSU, CNRS, ISTeP, Paris, France; U. S. Geological Survey Woods HoleMA, United States; GEOMAR Helmholtz Centre of Ocean Research, Kiel, Germany; Instituto Geológico y Minero de España, Tres Cantos, Madrid, Spain
Recommended Citation:
Rodríguez-Zurrunero A.,Granja-Bruña J.L.,Muñoz-Martín A.,et al. Along-strike segmentation in the northern Caribbean plate boundary zone (Hispaniola sector): Tectonic implications[J]. Tectonophysics,2020-01-01,776