RT Journal Article
T1 Características de los tensores de esfuerzos activos entre laDorsal Centroatlántica y la Península Ibérica.
A1 Vicente Muñoz, Gerardo de
A1 Martín Velázquez, Silvia
A1 Rodríguez Pascua, Miguel Angel
A1 Muñoz Martín, Alfonso
A1 Arcila, M.
A1 Andeweg, Bernd
AB The orientation of the principal stresses and the principal stress difference ratio has been determined along the southwestern boundary of the Euroasiatic plate with Northamerican and African plates by inversion method of focal mechanisms of earthquakes. The ridge push (30~ to 65Q N) ranges from E-W to ESE-WSW, with R values that show a triaxial extensional stress. The state of stress changes to strike-slip regime in the transform fault zones, and the Shmax strike turns clockwise to NW in the dextral strike-slip faults and counterclockwise to the NE in the sinistral ones. Along the margin between the Euroasiatic-African plates, from the Azores triple junction to Algeria, Shmax keeps a constant NW-SE strike but the stress ratio values range from triaxial extensional stress state, to the West, to uniaxial compresive stress state, to the East, passing through a strike-slip regime in the middle zone. In this context and with a widely NWSE Shmax, strike-slip and extensional stresses prevail in most Iberian peninsula, whereas southwards it is dominated by uniaxial compresive stresses.
PB Sociedad Geológica de España.
SN 1576-5172
YR 2000
FD 2000
LK https://hdl.handle.net/20.500.14352/57954
UL https://hdl.handle.net/20.500.14352/57954
LA spa
DS Docta Complutense
RD 30 abr 2024