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La estructura de la Cordillera Oriental de la República Dominicana
| Content Provider | Semantic Scholar |
|---|---|
| Author | Senz, Jesús García Monthel, J. Neira, José Alberto Díaz De Huerta, Pedro P. Hernáiz Viruete, Javier Escuder Estaún, Andrés Pérez |
| Copyright Year | 2007 |
| Abstract | The Oriental Cordillera of Dominican Republic is a mildly deformed area next to the north-eastern Caribbean plate boundary. Recent geological mapping of the cordillera reject the older ‘terrane’ subdivision, showing instead a coherent antiformal structure cored by Early Cretaceous island-arc rocks and covered by Late Cretaceous layered fore-arc sediments. The antiform is cut as a positive flower structure by late NW-SE strike-slip faults with sinistral movement (the main is the Yabon fault), that splay from the principal displacement zone of Samana. Shear bands adjacent to the Yabon fault contains en echelon folds with sigmoidal deformation and a fan arrangement of the hinge lines recording the progressive rotation of the folds towards the fault. The superposition of these folds to the previous antiformal folding produce dome and basin interference patterns. The structure at the easternmost part of the cordillera is a linked system of strikeslip faults, folds and pop-ups, with changes of the transverse profile along-strike, some folds are cut as half-anticlines and half-synclines by Riedel shears. Five small trastensional basins formed in the Paleogene by crustal thinning at the left stepovers and bends of the strike-slip faults, favouring the protrusion of ultrabasic rocks to the surface along the Yabon fault. The structural pattern of the cordillera has been used qualitatively to interpret the orientation of the principal strain axes in different times and the modes of deformation. We conclude that homogeneous contractional deformation in the upper Cretaceous changed to partitioned transpression in the Paleocene, in con- |
| Starting Page | 293 |
| Ending Page | 311 |
| Page Count | 19 |
| File Format | PDF HTM / HTML |
| Volume Number | 118 |
| Alternate Webpage(s) | http://aguas.igme.es/Boletin/2007/118_2_2007/ART.%207.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
