The recent (upper Miocene to Quaternary) and present tectonic stress distributions in the Iberian Peninsula



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Herraiz, Miguel and Vicente Muñoz, Gerardo de and Lindo, Rubén and Giner, Jorge and Simón, José Luis and González Casado, José Manuel and Vadillo, O. and Rodríguez Pascua, Miguel Angel and Cicuendez, J.I and Casas, Antonio and Cabañas, Luis and Rincón Calero, Pedro José and Cortes, L. and Ramírez, Mª Sol and Licini, Manuel (2000) The recent (upper Miocene to Quaternary) and present tectonic stress distributions in the Iberian Peninsula. Tectonics, 19 august 2000 (2000TC900006). pp. 762-786. ISSN 0278-7407

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A general synthesis of the recent and present stress
situation and evolution in the Iberian Peninsula was obtained from microstructural and seismological analysis. The stress evolution was deduced from (1) fault population analysis (FPA) from 409 sites distributed throughout the Iberian Peninsula, (2) paleostress indicators given by 324 stations taken from the bibliography, and (3) seismic data corresponding to 161 focal mechanisms evenly spread in the studied region. The application of FPA together with the determination of stress tensors and focal mechanisms for the whole Iberian microplate has provided two main results: (1) the Iberian Peninsula is undergoing a NW-SE oriented compression, except for the northeastern part Pyrenees,Ebro Basin, and Iberian Chain), where it is N-S to NE-SW, and
the Gulf of Cadiz, where it seems to be E-W, and (2) the main trends of the stress field have remained almost constant since the upper Miocene. The analysis performed by zones suggests the presence of local heterogeneities in the stress field.

Item Type:Article
Uncontrolled Keywords:Tectónica; Tensor de esfuerzos; Iberia
Subjects:Sciences > Geology > Seismology
Sciences > Geology > Geodynamics
ID Code:5959
Deposited On:17 Nov 2006
Last Modified:01 Sep 2010 10:44

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