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Título
Thrust emplacement of the Hispaniola peridotite belt : orogenic expression of the mid-Cretaceous Caribbean arc polarity reversal?
Autor(es)
Materia
Thrust (Geology)
Orogeny
Polarity reversal
Hispaniola
Materia USAL
Fallas (Geología)
Orogénesis
Grandes Antillas
Fecha de publicación
1996
Editor
Geological Society of America (Boulder, Estados Unidos)
Citación
Draper, G., Gutiérrez Alonso, G. y Lewis, J. F. (1996). Thrust emplacement of the Hispaniola peridotite belt : orogenic expression of the mid-Cetraceous Caribbean arc polarity reversal?. "Geology", 24 (12), 1143-1146.
Resumen
New structural data from central Hispaniola suggest that a mid-Cretaceous orogenicevent resulted in the obduction of peridotites onto the early Antillean arc. The MaimoŽn belt,which structurally underlies the peridotites, contains a shear zone composed of myloniticand phyllonitic schists formed by northward thrust emplacement of the peridotites. Penetrativedeformation decreases progressively to the northeast and is observed in the Neocomiansedimentary and volcanic rocks of the Los Ranchos Formation. The unconformablyoverlying, upper Albian Cenomanian limestones are not penetratively deformed, thusbracketing the obduction to Aptian-Albian time. This event is synchronous with chemicalchanges of the arc magmas in Hispaniola, Puerto Rico, and central Cuba. Thus, they mayboth be related to the postulated Greater Antillean polarity reversal.
Descripción
Artículo sobre el emplazamiento fallero en la zona de peridotitas de la Hispaniola (República Dominicana), estudiando si es la expresión orogénica de la polaridad reversa en la zona del Caribe en el cretácico medio.
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