DOI: 10.1016/j.tecto.2020.228452
论文题名: Neotectonic structures and stress fields associated with oblique collision and forearc sliver formation in northern Hispaniola: Implications for the seismic hazard assessment
作者: Escuder-Viruete J. ; Pérez Y.
刊名: Tectonophysics
ISSN: 00401951
出版年: 2020
卷: 784 语种: 英语
中文关键词: Caribbean plate
; Fault-slip data inversion
; Neotectonics
; Strike-slip fault
; Tectonic forearc sliver
英文关键词: Hazards
; Plates (structural components)
; Seismic response
; Stratigraphy
; Stresses
; Strike-slip faults
; Early pleistocene
; Internal deformation
; Left-lateral movements
; Middle Pleistocene
; Peak ground acceleration
; Regional distribution
; Seismic hazard assessment
; Shallow water carbonates
; Fault slips
; collision zone
; earthquake mechanism
; fault zone
; forearc basin
; formation mechanism
; hazard assessment
; neotectonics
; Pleistocene-Holocene boundary
; seismic hazard
; stress field
; structural geology
; tectonic setting
; Hispaniola
英文摘要: Active oblique collision between the Caribbean and North America plates has led to the formation of the Septentrional forearc sliver, which is a wedge-shaped crustal domain limited to the north by the North Hispaniola subduction thrust and to the south by the Septentrional Fault Zone (SFZ). In northern Hispaniola, oblique collision of the Bahamas Platform began in the uppermost Pliocene to Early Pleistocene and continues today. Collision-related tectono-stratigraphic processes include destruction of the shallow-water carbonate forearc platform, uplift and erosion of the Cordillera Septentrional and Samaná Peninsula, emergence of the Cibao Basin and syn-tectonic deposition of alluvial fan systems. The geometry and kinematics of neotectonics structures at all scales, together with stress field solutions obtained from late Cenozoic fault-slip data, show that the ENE-directed (far-) stress field associated with collision triggered the formation of the WNW-trending, left-lateral strike-slip SFZ. The SFZ thus represents the inland, concave master fault bounding the Septentrional forearc sliver. Subsidiary ENE to NE-trending left-lateral strike-slip faults (R-type) and NNE to NE-trending normal and oblique faults (T-type) controlled the internal deformation and subdivision into smaller tectonic blocks of the sliver. The highly oblique convergence and the increase in frictional plate coupling associated with the underthrusting of the Bahamas Platform are the likely causes of the formation of this forearc sliver. In the Western Cordillera Septentrional and Cibao Basin, an extensional regime is locally produced by the transfer of the left-lateral movement to a southern splay of the SFZ with the incorporation of a detached block to the Septentrional forearc sliver during the Middle Pleistocene-Holocene. The regional distribution of the modeled Peak Ground Acceleration values indicates that the SFZ is the greatest seismic hazard in northern Hispaniola. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/170578
Appears in Collections: 气候变化与战略
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作者单位: Instituto Geológico y Minero de España, C. La Calera 1, Tres Cantos, Madrid 28760, Spain; Servicio Geológico Nacional, Av. Winston Churchill 75, 3er piso, Santo Domingo, Dominican Republic
Recommended Citation:
Escuder-Viruete J.,Pérez Y.. Neotectonic structures and stress fields associated with oblique collision and forearc sliver formation in northern Hispaniola: Implications for the seismic hazard assessment[J]. Tectonophysics,2020-01-01,784