Crustal-scale transcurrent fault development in a weak-layered crust from an integrated geophysical research: Carboneras Fault Zone, eastern Betic Cordillera, Spain
Por:
Pedrera A., Mancilla, FD, Ruiz-Constán A., Galindo-Zaldívar J., Morales J., Arzate J., Marín-Lechado C., Ruano P., Buontempo L., Anahnah F., Stich D.
Publicada:
11 dic 2010
Resumen:
New magnetotelluric and receiver transfer function studies provide insights from the upper to the lower crust of the eastern Betic Cordillera, which is deformed by large folds, normal faults, and a major transcurrent left-lateral fault, the Carboneras Fault Zone (CFZ). Receiver function analysis determines a NNW dipping Moho reaching 20 degrees that increases in depth, from 20 km south of the CFZ up to 34 km in the Sierra de Los Filabres. In addition, seismic discontinuities determined in the upper crust are interpreted as major contacts between metamorphic complexes that are detached and folded. The MT inversion model reveals a conductive zone, also representing a crustal seismic discontinuity, associated with the Alpujarride/Nevado-Filabride contact and fitting the N vergent geometry of the Sierra Alhamilla antiform. A small flexure at Moho coincides with the CFZ, as revealed by the Bouguer anomaly trend, in agreement with the receiver function results. Moreover, the Bahr strike and
Filiaciones:
Pedrera A.:
Instituto Geológico y Minero de España, Rios Rosas 23, E-28003 Madrid, Spain
Ruiz-Constán A.:
Géosciences Montpellier, CNRS-Université Montpellier 2, Place E. Bataillon, F-34095 Montpellier CEDEX 5, France
Galindo-Zaldívar J.:
Departamento de Geodinámica, Universidad de Granada, Campus Fuentenueva s/n, E-18002 Granada, Spain
Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, Campus Fuentenueva s/n, E-18002 Granada, Spain
Morales J.:
Instituto Andaluz de Geofísica, Universidad de Granada, Campus Universitario de Cartuja s/n, E-18071 Granada, Spain
Departamento de Física Teórica y Del Cosmos, Universidad de Granada, Campus de Fuentenueva s/n, E-18002 Granada, Spain
Arzate J.:
Univ Nacl Autonoma Mexico, Ctr Geociencias, Queretaro, Mexico
Marín-Lechado C.:
Instituto Geológico y Minero de España, Rios Rosas 23, E-28003 Madrid, Spain
Ruano P.:
Departamento de Geodinámica, Universidad de Granada, Campus Fuentenueva s/n, E-18002 Granada, Spain
Instituto Andaluz de Ciencias de la Tierra, CSIC-Universidad de Granada, Campus Fuentenueva s/n, E-18002 Granada, Spain
Buontempo L.:
Instituto Andaluz de Geofísica, Universidad de Granada, Campus Universitario de Cartuja s/n, E-18071 Granada, Spain
Anahnah F.:
Departamento de Geodinámica, Universidad de Granada, Campus Fuentenueva s/n, E-18002 Granada, Spain
Stich D.:
Instituto Andaluz de Geofísica, Universidad de Granada, Campus Universitario de Cartuja s/n, E-18071 Granada, Spain
Departamento de Geodinámica, Universidad de Granada, Campus Fuentenueva s/n, E-18002 Granada, Spain
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