Magnetic fabrics in cleaved marls and their link to deformation processes (Southern Pyrenees, Spain) .

  1. Oliva Urcia, Belén
  2. Pueyo Morer, Emilio L.
  3. Larrasoaña, Juan C.
  4. Gil Imaz, Andrés
  5. Mata Campo, María Pilar
  6. Parés Casanova, Josep Maria
  7. Schleicher, A.M.
Revista:
Trabajos de geología

ISSN: 0474-9588

Año de publicación: 2010

Número: 30

Páginas: 107-113

Tipo: Artículo

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Otras publicaciones en: Trabajos de geología

Resumen

RT-AMS ellipsoids from Upper Cretaceous carbonate rocks in the Southwestern Pyreneesexhibit an unusual orientation for rocks within a well-cleavage domain: neither do all sites show themaximum axes in the intersection lineation nor are the minimum axes at the pole of the cleavage plane.The study of the subfabrics (LT-AMS and AARM) indicates that the paramagnetic grains (phyllosilicates)respond to a layer parallel shortening, with the minimum axis perpendicular to S0. On the otherhand, the ferromagnetic grains (magnetite) orient in relation to the strain field, which also producesthe cleavage domain. The maximum axes of the ferromagnetic ellipsoids have a horizontal NNE-SSWdirection. An extended version of this paper is published in Oliva-Urcia et al. (2009).

Referencias bibliográficas

  • AUBOURG, C., ROCHETTE, P. and VIALON, P. (1991): Subtle stretching lineation revealed by magnetic fabric of CallovianOxfordian black shales (French Alps). Tectonophysics, 185: 211- 223.
  • AUBOURG, C., ROCHETTE, P. and BERGMÜLLER, F. (1995): Composite magnetic fabric in weakly deformed black shales. Phys. Earth Planet. In., 87: 267-278.
  • AUBOURG, C., FRIZON DE LAMOTTE, D., POISSON, A. and MERCIER, E. (1997): Magnetic fabrics and oblique ramp-related folding: A case study from the western Taurus (Turkey). J. Struct. Geol., 19, 8: 1111-1120.
  • BORRADAILE, G. J., WERNER, T. and LAGROIX, F. (1999): Magnetic fabrics and anisotropy-controlled thrusting in the Kapuskasing Structural Zone, Canada. Tectonophysics, 302: 241- 256.
  • BORRADAILE, G. J. and JACKSON, K. (2004): Anisotropy of magnetic susceptibility (AMS); magnetic petrofabrics of deformed rocks. Geol. Soc. Spec. Publ., 238: 299-360.
  • CHOUKROUNE, P. (1976): Structure et évolution tectonique de la zone nord-pyrénéene: Analyse de la déformation dans une portion de la chaîne à schistosité subverticale. Mem. Soc. Géol. Fr., 127: 1- 116.
  • CHOUKROUNE, P. and SEGURET, M. (1973): Carte Structurale des Pyrénées. ELF-ERAP, Mission France, Boussens.
  • GIRDLER, R. W. (1961): The measurement and computation of anisotropy of magnetic susceptibility in rocks. Geophys. J. Roy. Astr. S., 5: 34-44.
  • GRAHAM, J. W. (1954): Magnetic susceptibility anisotropy, an unexploited petrofabric element. Geol. Soc. Am. Bull., 65, 12, 2: 1257-1258.
  • HO, N. C., PEACOR, D. R. and VAN DER PLUIJM, B. A. (1994): Reorientation mechanisms of phyllosilicates in the mudstone-toslate transition at Lehigh Gap, Pennsylvania. J. Struct. Geol., 17, 3: 345-356.
  • JELÍNEK, V. (1981): Characterization of the magnetic fabric of rocks. Tectonophysics, 79: 63-70.
  • KLIGFIELD, R., OWENS, W. H. and LOWRIE, W. (1981). Magnetic susceptibility anisotropy, strain, and progressive deformation in Permian sediments from the Maritime Alps (France). Earth Planet. Sc. Lett., 55: 181-189.
  • LARRASOAÑA, J. C, PUEYO, E. L. and PARÉS, J. M. (2004): An inte- grated AMS structural, paleoand rock-magnetic study of the Eocene marine marls from the Jaca-Pamplona basin (Pyrenees, N Spain); new insights into the timing of magnetic fabric acquisition in weakly deformed mudrocks. In: F. MARTÍN-HERNÁNDEZ, C. M. LÜNEBURG, C. AUBOURG and M. JACKSON (eds): Magnetic fabric, methods and applications. Geol. Soc. Spec. Publ., 238: 127-143.
  • OLIVA-URCIA, B. and PUEYO, E. L. (2007): Rotational basement kinematics deduced from remagnetized cover rocks (Internal Sierras, southwestern Pyrenees). Tectonics, 26, TC4014, doi:10.1029/2006TC001955.
  • OLIVA-URCIA, B., LARRASOAÑA, J. C., PUEYO, E. L., GIL, A., MATA, P., PARÉS, J. M., SCHLEICHER, A. M. and PUEYO, O. (2009): Disentangling magnetic subfabrics and their link to deformation processes in cleaved sedimentary rocks from the Internal Sierras (west central Pyrenees, Spain). J. Struc. Geol., 31: 163-176.
  • OLIVA-URCIA, B., PUEYO, E. L., LARRASOAÑA, J. C., GIL, A., MATA, P., PARÉS, J. M., SCHLEICHER, A. M. and PUEYO, O. (submitted): Complex magnetic subfabrics and their link to deformation processes in cleaved sedimentary rocks (Internal Sierras, Pyrenees, Spain). Tectonophysics.
  • PARÉS, J. M., VAN DER PLUIJM, B. A. and DINARÉS-TURELL, J. (1999): Evolution of magnetic fabrics during incipient deformation of mudrocks (Pyrenees, northern Spain). Tectonophysics, 307: 1-14.
  • PARÉS, J. M. and VAN DER PLUIJM, B. (2002): Evaluating magnetic lineations (AMS) in deformed rocks. Tectonophysics, 350: 283- 298.
  • TEIXELL, A. and GARCÍA-SANSEGUNDO, J. (1994): Mapa Geológico de España, Escala 1:50 000, 2ª serie, Hoja n° 118: ZURIZA. Instituto Tecnológico Geominero de España, Madrid.
  • TEIXELL, A., DURNEY, D. W. and ARBOLEYA, M. L. (2000): Stress and fluid control on decollement within competent limestone. J. Struct. Geol., 22: 349-371.
  • VAN DER PLUIJM, B. A., HO, N. C. and PEACOR, D. (1994): Highresolution X-ray texture goniometry. J. Struct. Geol., 16, 7: 1029- 1032.
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