From strike-slip to reverse reactivation: The Crevillente Fault System and seismicity in the Bullas-Mula area (Betic Cordillera, SE Spain)

Authors

  • Carlos Sanz de Galdeano Equiza SIC-Universidad de Granada
  • Vicenta María Elisa Buforn Peiró Universidad Complutense

DOI:

https://doi.org/10.1344/105.000001394

Keywords:

Betic Cordillera, Crevillente Fault, Mula earthquakes, Neotectonics

Abstract

Several major N80ºE faults occur in the Bullas-Mula area (SE Spain). These faults and the numerous thrust slices of the Sierra de Ricote can be related to the movements of the Crevillente (or Cadiz-Alicante) fault system, which causes the westward displacement of the Betic Internal Zone and part of the External Zone. These faults moved with dextral strike-slip from Late Burdigalian to Early Tortonian. From this time on, the σ1 position changed from a WNW-ESE direction to approximately N-S, giving rise to movements with a new reverse character. The focal mechanisms of the 1999 Mula earthquakes indicate a N80ºE nodal plane, and their pressure axes also coincide with the σ1 direction existing from the Late Miocene and deduced from mesotectonic analysis at many points of the region. There is also good coincidence between their epicentral position and the fault traces. The Bullas earthquakes that occurred in 2002 are not directly related to the Crevillente faults, although their stress-pressure axes coincide with the σ1 direction reported there.

Author Biographies

Carlos Sanz de Galdeano Equiza, SIC-Universidad de Granada

Facultad de Ciencias.

Vicenta María Elisa Buforn Peiró, Universidad Complutense

Departamento de Geofísica y Meteorología, Facultad de Ciencias Físicas

References

Allerton, S., Lonergan, L., Platt, J.P., Platzmann E.S., McClelland, E., 1993. Palaeomagnetic rotation in the eastern Betic Cordillera, southern Spain. Earth and Planetary Science Letters, 119, 225-241.

Allerton, S., Platt, J.P., Platzmann, E.S., McClelland, E., Lonergan L., 1992. Palaeomagnetic study of Tectonic Rotations in the Eastern Betic Cordillera, Southern Spain. Física de la Tierra. In: Osete, M.L., Calvo, M. (eds.). Paleomagnetismo y Tectónica en las Cordilleras Béticas. Madrid, Ed. Complutense, 4, 185-204.

Andrieux, J., Fontboté, J.M., Mattauer, M., 1971. Sur un modèle explicatif de l’Arc de Gibraltar. Earth and Planetary Science Letters, 12, 191-198.

Boillot, G., Montadert, L., Lemoine, M., Biju-Duval, B., 1984. Les marges continentales actuelles et fossiles autour de la France. Masson, Paris, 342 pp.

Buforn, E., Sanz de Galdeano, C., 2001. Focal mechanism of Mula (Murcia, Spain) earthquake of February 2, 1999. Journal of Seismology, 5, 277-280.

Buforn, E., Benito, B., Sanz de Galdeano, C., del Fresno, C., Muñoz, D., Rodríguez, I., 2005. Study of the damaging earthquakes of 1911, 1999 and 2002 in the Murcia (SE Spain) region: Seismotectonic and Seismic risk implications. Bulletin of the Seismological Society of America, 95(2), 549-567.

Durand-Delga, M., 1980. La Méditerranée occidentale: étape de sa genèse et problèmes structuraux liés à celle-ci. Livre Jubilaire de la Societé géologique de France, 1830-1980.

Mémoire hors série de la Societé géologique de France, 10, 203-224.

Durand-Delga M., Fontboté, J.M., 1980. Le cadre structural de la Méditerranée occidentale. 26 Congrès Géologique Internationale Les Chaînes alpines issues de la Téthys. Paris, Mémoire du Bulletin de Recherche Géologique et Minière, 115, 67-85.

Galindo-Zaldívar, J., González-Lodeiro, F., 1988. Faulting phase differentiation by means of computer search on a grid pattern. Annales Tectonicae, II, 2, 90-97.

Galindo-Zaldívar, J., González-Lodeiro, F., Jabaloy, A., 1993. Stress and palaeostress in the Betic-Rif cordilleras (Miocene to the present). Tectonophysics, 227, 105-126.

Hermes, J.J., 1985. Algunos aspectos de la estructura de la Zona Subbética (Cordilleras Béticas, España Meridional). Estudios Geológicos, 41, 157-176.

Jerez Mir, L., Jerez Mir, F., García-Monzón, G., 1974. Mapa Geológico de España. Scale 1:50.000, no. 912, Mula. Instituto Geológico y Minero de España, 30 pp., 1 fold map.

Mancilla, F.L., Ammon, C.J., Hermann, R.B., Morales, J., 2002. Faulting parameters of the 1999 Mula earthquake, southeastern Spain. Tectonophysics, 354, 139-155.

Martín-Algarra, A., 1987. Evolución geológica alpina del contacto entre las Zonas Internas y las Zonas Externas de la Cordillera Bética. Doctoral thesis. Universidad de Granada, 1171 pp.

Martín-Martín, M., 1996. El Terciario del dominio Maláguide en Sierra Espuña (Cordillera Bética oriental, SE de España). Estratigrafía y evolución paleogeográfica. Doctoral thesis. Universidad de Granada, 297 pp.

Martínez-Díaz, J.J., Rigo, A., Louis, L., Capote, R., HernándezEnrile, J.L., Carreño, E., Tsige, M., 2002a. Estudio por interferometría de radar (Insar) del terremoto de Mula (Murcia) de febrero 1999 (mb: 4.8) aplicado a la caracterización de la

fuente sismogenética. Boletín Geológico y Minero, 113(1), 23-33.

Martínez-Díaz, J. J., Rigo, A., Louis, L., Capote, R., HernándezEnrile, J. L., Carreño, E., Tsige, M., 2002b. Caracterización geológica y sismotectónica del terremoto de Mula (febrero de 1999, Mb: 4,8) mediante la utilización de datos geológicos, sismológicos y de interferometría de RADAR (INSAR). Geogaceta, 31, 147-150.

Montenat, C., Ott d’Estevou, P., Rodríguez Fernández, J., Sanz de Galdeano, C., 1990. Geodynamic evolution of the Betic

Neogene Intramontane Basins (S and SE Spain). In: Iberian Neogene Basins. IX R.C.M.N.S. Congress, Barcelona, Paleontologia i Evolució, Special Publication, 7-59.

Muñoz, D., Udías, A. 1991. Three large historical earthquakes in southern Spain. In : Seismicity, seismotectonics and Seismic Risk of the Ibero-Maghrebian region. Instituto Geográfico Nacional, Madrid, 175-192.

Ott d’Estevou, P., Montenat, C., 1985. Evolution structurale de la zone bétique orientale (Espagne) du Tortonien a l’Holocène. Comptes Rendues de l’Académie des Sciences de Paris, 300, II, 8, 363-368.

Paquet, J., 1969. Étude géologique de l’Ouest de la province de Murcie (Espagne). Mémoire de la Societé géologique de France, 111, 48, 260 pp.

Sanz de Galdeano, C., 1983. Los accidentes y fracturas principales de las Cordilleras Béticas. Estudios Geológicos, 39, 157-165.

Sanz de Galdeano, C., 1990. Geologic evolution of the Betic Cordilleras in the Western Mediterranean, Miocene to the present. Tectonophysics, 172, 107-119.

Sanz de Galdeano, C., Vera, J.A., 1992. Stratigraphic record and palaeogeographical context of the Neogene basins in the Betic Cordillera, Spain. Basin Research, 4, 21-36.

Stich, D., Ammon, C., Morales, J., 2003. Moment tensor solutions for small and moderate earthquakes in the IberoMaghreb region. Journal of Geophysical Research, 108 (B3), 2148, doi: 10.1029/2002JB002057.

Tearpock, D.J., Bischke, R.E., 2003. Applied Subsurface Geological Mapping with Structural Methods. In: Walker, L.G. (ed.). Upper Saddle River, New Jersey, 2nd Ed. Prentice Hall Professional Technical Reference, 822 pp.

Sylvester, A.G., 1988. Strike-slip faults. Geological Society of American Bulletin, 100, 1666-1703.

Velando, F., Paquet, J., 1974. Mapa Geológico de España, Scale 1:50.000, no. 911. Cehegín, Instituto Geológico y Minero de

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2005-01-13

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