RT Journal Article
T1 Late extensional shear zones and associated recumbent folds in the Alpujarride subduction complex, Betic Cordillera, southern Spain
A1 Orozco, Miguel
A1 Alonso Chaves, Francisco Manuel
A1 Platt, J. P.
AB The existence in the Alpujarride Complex (Betic Cordillera, southern Spain) of a relatively continuous extensionalevent (following crustal thickening) is based on detailed structural studies and is consistent with the P-T paths andgeochronological data established for the Alpujarride rocks. According to our research, the Alpujarride Complexcontains two large-scale shear zones accommodating early Miocene extension. The shear zones contain km-scalerecumbent folds, some with sheath fold geometry, and megaboudinage structures, and are closely associated withdetachment faults.Large-scale folds and boudins cause dome-like undulations in the detachments, which are inferred to overlap intime with the deformation in the shear zones. One shear zone in the eastern part of the orogen is top-N; the other,in the western part, is top-E. The change in the shear direction may represent a temporal evolution in the directionof shear, possibly related to a change in the subduction direction in space and time.
PB Universitat de Barcelona
SN 1695-6133
YR 2017
FD 2017
LK http://hdl.handle.net/10272/13647
UL http://hdl.handle.net/10272/13647
LA eng
NO Orozco, M., Alonso Chaves, F.M., Platt, J.P.: "Late extensional shear zones and associated recumbent folds in the Alpujarride subduction complex, Betic Cordillera, southern Spain". Geologica Acta. Vol. 15, n. 1, págs. 51-66, (2017). DOI: 10.1344/GeologicaActa2017.15.1.5,
DS Repositorio Institucional de la Universidad de Huelva
RD 30 may 2026