Lithospheric structure of the Western Pyrenees-Cantabrian Mountainsm based on 3D modelling of gravity anomalies and geoid undulations:preliminary results .

  1. D. Pedreira 1
  2. J. Ebbing
  3. J. A. Pulgar 1
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Revista:
Trabajos de geología

ISSN: 0474-9588

Any de publicació: 2010

Número: 30

Pàgines: 121-127

Tipus: Article

DIALNET GOOGLE SCHOLAR lock_openAccés obert editor

Altres publicacions en: Trabajos de geología

Resum

The lithospheric structure of the contact zone between the Iberian and European plates inthe transition from the Western Pyrenees to the Cantabrian Mountains is investigated by 3D modellingof gravity anomalies and geoid undulations. The main target of this study is to gain insight intothe deep geometry of this plate boundary, especially into the topography of the lithosphere-asthenosphereboundary. The results, still preliminary, suggest that the lithospheric thickness is similar on theIberian and European sides, with a small and discontinuous lithospheric root in the contact zonebetween the two plates.

Referències bibliogràfiques

  • ARDIZONE, J., MEZCUA, J. and SOCÍAS, I. (1989): Mapa Aeromagnético de España Peninsular, Instituto Geográfico Nacional, Madrid.
  • ALLER, J. and ZEYEN, H. J. (1996): A 2.5D interpretation of the Basque country magnetic anomaly (northern Spain): geodynamical implications. Geol. Rundsch., 85: 303-309.
  • AYALA, C., TORNÉ, M. and POUS, J. (2004): The lithosphereasthenosphere boundary in the western Mediterranean from 3D joint gravity and geoid modelling: tectonic implications. Earth Planet. Sc. Lett., 209: 275-290.
  • AYARZA, P., MARTÍNEZ-CATALÁN, J. R., ÁLVAREZ-MARRÓN, J., ZEYEN, H. and JUHLIN, C. (2004): Geophysical constraints on the deep structure of a limited ocean-continent subduction zone at the North Iberian Margin. Tectonics, 23, TC1010, doi:10.1029/2002TC001487.
  • DÍAZ, J., GALLART, J., PEDREIRA, D., PULGAR, J. A., RUIZ, M., LÓPEZ, C. and GONZÁLEZ-CORTINA, J. M. (2003): Teleseismic imaging of alpine crustal underthrusting beneath N-iberia. Geophys. Res. Lett., 30, 11. doi:10.1029/2003GL017073.
  • FEATHERSTONE, W. E. (1997): On the Use of the Geoid in Geophysics: A Case Study Over the North-West Shelf of Australia. Explor. Geophys., 28, 1: 52-57.
  • FERNÁNDEZ-VIEJO, G., GALLART, J., PULGAR, J. A., CÓRDOBA, D. and DAÑOBEITIA, J. J. (2000): Seismic signature of Variscan and Alpine tectonics in NW Iberia: Crustal structure of the Cantabrian Mountains and Duero basin. J. Geophys. Res., 105, B2: 3001-3018.
  • GALLASTEGUI, J. (2000): Estructura cortical de la Cordillera y Margen Continental Cantábricos: Perfiles ESCI-N. Trabajos de Geología, 22: 9-234.
  • GÖTZE, H. J., and B. LAHMEYER (1988): Application of three-dimensional interactive modelling in gravity and magnetics. Geophysics, 53, 8: 1096-1108.
  • GRANDJEAN, G., MÉNNECHET, C., DEBEGLIA, N. and BONIJOLY, D. (1998): Insuring the Quality of Gravity Data. Eos Trans. Am. Geophys. Union, 79, 18: 217-221.
  • LEDO, J., AYALA, C., POUS, J., QUERALT, P., MARCUELLO, A. and MUÑOZ, J. A. (2000): New geophysical constraints on the deep structure of the Pyrenees. Geophys. Res. Lett., 27: 1037-1040.
  • MUÑOZ, J. A. (1992): Evolution of a continental collision belt: ECORS Pyrenees crustal balanced cross-section. In: K. R. MCCLAY (ed): Thrust Tectonics, Chapman and Hall, Boston, Massachusetts: 235-246.
  • PAVLIS, N. K., HOLMES, S. A., KENYON, S. C. and FACTOR, J. K. (2008): An Earth Gravitational Model to Degree 2160: EGM2008. Geophys. Res. Abstr., 10, EGU2008-A-01891.
  • PEDREIRA, D., PULGAR, J. A., GALLART, J. and DÍAZ, J. (2003): Seismic evidence of Alpine crustal thickening and wedging from the western Pyrenees to the Cantabrian Mountains (north Iberia). J. Geophys. Res., 108, B4: doi:10.1029/2001JB001667.
  • PEDREIRA, D., PULGAR, J. A., GALLART, J. and TORNÉ, M. (2007): Three-dimensional gravity and magnetic modelling of crustal indentation and wedging in the western Pyrenees-Cantabrian Mountains, J. Geophys. Res., 112, B12405, doi:10.1029/2007JB005021.
  • PINET, B., MONTADERT, L. and ECORS SCIENTIFIC PARTY (1987): Deep seismic reflection and refraction profiling along the Aquitaine shelf (Bay of Biscay). Geophys. J. Roy. Astr. S., 89: 305- 312.
  • POUPINET, G., SOURIAU, A., VADELL, M. and NJIKE-KASSALA, J. D. (1992): Constraints on the lithospheric structure beneath the North Pyrenean fault from teleseismic observations. Geology, 20: 157-160.
  • POUS, J., MUÑOZ, J. A., LEDO, J. J. and LIESA, M. (1995): Partial melting of subducted continental lower crust in the Pyrenees. J. Geol. Soc. London, 152: 217-220.
  • PULGAR, J. A., GALLART, J., FERNÁNDEZ-VIEJO, G., PÉREZESTAÚN, A., ÁLVAREZ-MARRÓN, J. and ESCIN GROUP (1996): Seismic image of the Cantabrian Mountains in the western extension of the Pyrenees from integrated ESCIN reflection and refraction data. Tectonophysics, 264: 1-19.
  • SANDWELL, D. T. and SMITH, W. H. F. (1997): Marine gravity anomaly from Geosat and ERS-1 satellites. J. Geophys. Res., 102, B5: 10039-10054.
  • SCHMIDT, S. and GÖTZE, H. J. (1998): Interactive visualization and modification of 3D models using GIS functions. Phys. Chem. Earth Pt. A, 23, 3: 289-295.
  • SCHMIDT, S. and GÖTZE, H. J. (1999): Integration of Data Constraints and Potential Field Modelling an Example from Southern Lower Saxony, Germany. Phys. Chem. Earth Pt. A, 24, 3: 191-196.
  • SEVILLA, M. J. (1995): A new gravimetric geoid in the Iberian Peninsula. In: New Geoids in the World, BGI, Bull. D’inf, 77 and IGeS Bull., 4: 163-180.
  • SOURIAU, A. and M. GRANET (1995): A tomographic study of the lithosphere beneath the Pyrenees from local and teleseismic data. J. Geophys. Res., 100, B9:18117-18134.
  • TEIXELL, A. (1998): Crustal structure and orogenic material budget in the west central Pyrenees. Tectonics, 17, 3: 395-406.
  • VERGÉS, J., MILLÁN, H., ROCA, E., MUÑOZ, J. A., MARZO, M., CIRÉS, J., DEN BEZEMER, T., ZOETEMEIJER, R. and CLOETING, S. (1995): Eastern Pyrenees and related foreland basins: Pre-, synand post-collisional crustal-scale cross section. Mar. Petrol. Geol., 12, 8: 893-915.
  • ZEYEN, H. and FERNÁNDEZ, M. (1994): Integrated lithospheric modelling combining thermal, gravity, and local isostasy analysis: Application to the NE Spanish Geotransect. J. Geophys. Res., 99, B9: 18089-18102.
Fuente de los datos: Dialnet