Contenido principal del artículo

  • Carlos Galé
  • Andrés Gil Imaz
  • Marceliano Lago
  • Óscar Pueyo
  • Enrique Arranz
  • Teresa Ubide
Carlos Galé
Andrés Gil Imaz
Marceliano Lago
Óscar Pueyo
Enrique Arranz
Teresa Ubide
N.º 13, Artículos, Páginas 135-150
Aceptado: may 15, 2015

Resumen

El plutón varisco de Panticosa está atravesado por dos conjuntos consecutivos de diques de lamprófidos, composicionalmente diferentes y que se emplazaron según direcciones distintas: 1) espesartitas minoritarias,
con direcciones N-S, y 2) camptonitas, predominantes, de direcciones O-E a NO-SE. El estudio de ASM refleja las diferencias en la mineralogía magnética entre ambas familias y permite elaborar un modelo temporal de emplazamiento, en relación con el marco estructural, consistente en dos etapas; una primera, de creación de un sistema de diques subperpendiculares bajo el efecto de una compresión generalizada NE-SO, y una posterior, de deformación asociada a una dirección de compresión NO-SE

Detalles del artículo

Citas

CALLOT, J. P.; GEOFFROY, L.; AUBOURG, C.; POZZI, J. P., & MEGE, D. (2001). Magma flow directions of shallow dykes from the East Greenland volcanic margin inferred from magnetic fabric studies. Tectonophysics, 335: 313-329.

CALLOT, J. P., & GUICHET, X. (2003). Rock texture and magnetic lineation in dykes: a simple analytical model. Tectonophysics, 366: 207-222.

CAÑÓN-TAPIA, E.; WALKER, G. P. L., & HERRERO-BERVERA, E. (1996). The internal structure of lavas: insights from AMS measurements I: near vent “a-a”. Journal of Volcanology and Geothermal Research, 70: 21-36.

DEBON, F. (1975). Les massifs granitoïdes à structure concentrique de Cauterets-Panticosa (Pyrénées occidentales) et leurs enclaves. Une étude pétrographique et géochimique. Mém. Sci. de la Terre. Nancy, 33, 420 pp.

ELLWOOD, B. B. (1978). Flow and emplacement direction determined for selected basaltic bodies using magnetic susceptibility anisotropy measurements. Earth and Planetary Science Letters, 41: 254-264.

ERNST, R. E., & BARAGAR, W. R. A. (1992). Evidence from magnetic fabric for the flow pattern of magma in the MacKenzie giant radiating dyke swarm. Nature, 356: 511-513.

GALÉ, C.; LAGO, M.; ARRANZ, E.; GIL, A., y POCOVÍ, A. (2003). Geochemistry of the alkaline magmatism related to the onset of Mesozoic extension in the Pyrenees. En Volumen de Actas del IV Iberian Geochemical Meeting: 75-77.

GALÉ, C. (2005). Evolución geoquímica, petrogenética y de condiciones geodinámicas de los magmatismos pérmicos en los sectores central y occidental del Pirineo. Tesis doctoral. Universidad de Zaragoza. 467 pp.

GEOFFROY, L.; CALLOT, J. P.; AUBOURG, C., & MOREIRA, M. (2002). Magnetic and plagioclases linear fabric discrepancy in dykes: a new way to define the flow vector using magnetic foliation. Terra Nova, 14: 183-190.

GIL, A.; LAGO, M.; GALÉ, C.; POCOVÍ, A., y ARRANZ, E. (2002). Magnetic fabric in folded sills and lava flows. A case study in the Permian basalts of the Anayet Massif (Pyrenean Axial Zone, Spain). Tectonophysics, 350: 1-15.

GLEN, J. M.; RENNE, P. R.; MILNER, S. C., & COE, R. S. (1997). Magma flow inferred from anisotropy of magnetic susceptibility in the coastal Paraná-Etendeká igneous province: Evidence for rifting before flood volcanism. Geology, 25: 1131-1134.

HENRY, B. (1997). The magnetic zone axis: a new element of magnetic fabric for the interpretation of the magnetic lineation. Tectonophysics, 271: 325-351.

HERRERO-BERVERA, E.; CAÑÓN-TAPIA, E.; WALKER, G. P. L., & TANAKA, H. (2001). Magnetic fabric study and inferred flow directions of lavas of the Old Pali Road, Oáhu, Hawaii. Journal of Volcanology and Geothermal Research, 118: 161-171.

HILLHOUSE, J. W., & WELLS, R. E. (1991). Magnetic fabric, flow direction and source area of the lower Miocene Peach Spring Tuff in Arizona, California and Nevada. Journal of Geophysical Research, 96: 12443-12460.

HROUDA, F. (1982). Magnetic anisotropy and its application in geology and geophysics. Geophysical Survey, 5: 37-82.

HROUDA, F., & KAHAN, S. (1991). The magnetic fabric relationship between sedimentary and basement nappes in the High Tatra Mountains, N. Slovakia. Journal of Structural Geology, 13: 431-442.

JELINEK, V. (1981). Characterization of the magnetic fabric of rocks. Tectonophysics, 79: 63-67.

KHAN, M. A. (1962). The anisotropy of magnetic susceptibility of some igneous and metamorphic rocks. Journal of Geophysical Research, 67: 2873-2885.

KNIGHT, M. D., & WALKER, G. P. L. (1988). Magma flow directions in flows of the Koolau Complex, Oahu, determined from magnetic fabric studies. Journal of Geophysical Research, 93: 4308-4319.

LAGO, M.; GALÉ, C.; GIL, A.; ARRANZ, E., y POCOVÍ, A. (2004a). Los lamprófidos alcalinos del Pérmico superior emplazados en el plutón granitoideo de Panticosa (Huesca): petrología y mineralogía. Geotemas, 6(1): 61-65.

LAGO, M.; GALÉ, C.; ARRANZ, E.; GIL, A., y POCOVÍ, A. (2004b). Geoquímica de los lamprófidos alcalinos del plutón granitoideo de Panticosa (Huesca). Geotemas, 6(1): 65-68.

LAGO, M.; ARRANZ, E.; POCOVÍ, A.; GALÉ, C., & GIL-IMAZ, A. (2004c). Upper permian magmatism and basin dynamics in the southern Pyrenees: a record of the transition from late Variscan transtensional to early Alpine extension. En WILSON, M.; NEUMANN, E. R.; DAVIES, G. R.; TIMMERMAN, M. J.; HEEREMANS, M., y LARSEN, B. T. (eds.). Permocarboniferous magmatism and rifting in Europe. Geological Society, Londres, Special Publication, 223: 439-464.

ROCHETTE, P.; JENATTON, L.; DUPUY, C.; BOUDIER, F., & REUBER, I. (1991). Emplacement modes of basaltic dykes in the Oman ophiolite: evidence from magnetic anisotropy with reference to geochemical studies. En PETERS, T. J. (ed.). Ophiolite Genesis and the Evolution of the Oceanic Lithosphere. Kluwer. Dordrecht. 55-82.

ROCHETTE, P.; AUBOURG, C., & PERRIN, M. (1999). Is this magnetic fabric normal? A review and case studies in volcanic formations. Tectonophysics, 307: 219-234.

STAUDIGEL, H. G.; GEE, G.; TAUXE, L., & VARGA, R. J. (1992). Shallow intrusive direction of sheeted dykes in the Troodos ophiolite: anisotropy of magnetic susceptibility and structural data. Geology, 20: 841-844.

TAMRAT, E., & ERNESTO, M. (1999). Magnetic fabric and rock-magnetic character of the Mesozoic flood basalts of the Paraná Basin, Brazil. Journal of Geodynamics, 28: 419-437.

TARLING, D. H., & HROUDA, F. (1993). The magnetic anisotropy of rocks. Chapman & Hall Eds. Londres. 217 pp.

VARGA, R. J.; GEE, J. S.; STAUDIGEL, H., & TAUXE, L. (1998). Dykes surfaces lineations as magma flow indicators within the sheeted dyke complex of the Troodos ophiolite. Cyprus. Journal of Geophysical Research, 103: 5241-5256.

WALKER, G. P. L.; CAÑÓN-TAPIA, E., & HERRERO-BERVERA, E. (1999). Origin of vesicle layering and double imbrication by endogenous growth in the Birkett basalt flow (Columbia River plateau). Journal of Volcanology and Geothermal Research, 88: 15-28.