Petrography and mineral chemistry of mafic granulites from the Cofrentes volcano: nature of the lower crust under the eastern Iberian Peninsula

Authors

  • María García-Rodríguez Dpto. Mineralogía y Petrología, Universidad Complutense de Madrid.
  • David Orejana Dpto. Mineralogía y Petrología, Universidad Complutense de Madrid.
  • Cristina de Ignacio Dpto. Mineralogía y Petrología, Universidad Complutense de Madrid.

DOI:

https://doi.org/10.55407/geogaceta98429

Keywords:

mafic granulite, Cofrentes volcano, lower crust, mineral chemistry

Abstract

The lava flows from the Cofrentes volcano carry a variety of xenoliths including mafic granulites composed of plagioclase, orthopyroxene, clinopyroxene and olivine. The petrography and mineral chemistry of these enclaves point to an igneous origin of their protoliths, with subsequent re-equilibration in granulite facies conditions. These rocks represent lower crustal cumulates, resulting from crystallization of basic magmas. They also display textural features compatible with reaction with the host alkaline melts. These granulites are exclusively mafic, unlike what is observed in other sectors of the Iberian Massif, where felsic granulite xenoliths are abundant.

References

Ancochea, E. y Nixon, P.H. (1987). En: Mantle Xenoliths (Nixon, P.H., Ed.). Wiley, Chichester, 119-124.

Ancochea, E. y Huertas, M. J. (2002). Geogaceta 32, 31-34.

Anchochea, E., Muñoz, M. y Sagredo, J. (1984). Ier Congreso Español de Geología: T.II, 1-13.

Aoki, K. y Kushiro, I. (1968). Contributions to Mineralogy and Petrology 18, 326-337. https://doi.org/10.1007/BF00399694

Bianchini, G., Braga, R., Langone, A., Natali,C. y Tiepolo, M. (2015). Lithos 220-223, 191-199. https://doi.org/10.1016/j.lithos.2015.02.011

Brey, G.P. y Kohler, T. (1990). Journal of Petrology 31, 1353-1378. https://doi.org/10.1093/petrology/31.6.1353

Coltorti, M., Bonadiman, C., Hinton, R.W. y Siena, F. y Upton, B.G.J. (1999) Journal of Petrology 40, 133-165.

Deer, W.A., Howie, R.A., Zussman, J. (1996). An Introduction to the rock-forming minerals (2nd edition), Prentice-Hall, London, 712 pp. https://doi.org/10.1093/petroj/40.1.133

Diaz, J., Torne, M., Vergés, J., Jiménez-Munt, I., Martí, J., Carbonell, R., Schimmel, M., Geyer, A., Ruiz, M., García-Castellanos, D., Álvarez-Marrón, J., Brown, D., Villaseñor, A., Ayala, C., Palomeras, I., Fernandez M. y Gallart, J. (2022). Earth-Science Reviews 222, 103841. https://doi.org/10.1016/j.earscirev.2021.103841

Hunter, R.H. Upton, B.G.J. y Aspen, P. (1984). Transactions of the Royal Society of Edinburgh: Earth Sciences 75, 75-84. https://doi.org/10.1017/S0263593300013742

Irving, A.J. (1974). Journal of Petrology 15, 1-40. https://doi.org/10.1093/petrology/15.1.1

Martí, J., Mitjavila, J., Roca, E. y Aparicio, A. (1992). Tectonophysics 203, 146-165. https://doi.org/10.1016/0040-1951(92)90221-Q

Nickel, K.G., Brey, G.P. y Kogarko, L. (1985). Contributions to Mineralogy and Petrology 91, 44-53. https://doi.org/10.1007/BF00429426

Orejana, D., Villaseca, C. y Paterson, B.A. (2006). Lithos 86, 167-196. https://doi.org/10.1016/j.lithos.2005.03.014

Orejana, D., Villaseca, C. y Paterson, B.A. (2007). European Journal of Mineralogy 19, 817-832. https://doi.org/10.1127/0935-1221/2007/0019-1763

Puelles, P., Gil Ibarguchi, J.I., García de Madinabeitia, S., Sarrionandia, F., Carracedo-Sánchez, M. y Fernández-Armas, F. (2019). Lithos 342-343, 114-134. https://doi.org/10.1016/j.lithos.2019.05.031

Sen, G. y Jones, R. (1989). Journal of Geophysical Research-Solid Earth and Planets 94, 17871-17880. https://doi.org/10.1029/JB094iB12p17871

Villaseca, C., Downes, H., Pin, C. y Barbero, L. (1999). Journal of Petrology 40, 1465-1496. https://doi.org/10.1093/petroj/40.10.1465

Villaseca, C., Orejana, D., Paterson, B.A., Billström, K. y Pérez-Soba, C. (2007). European Journal of Mineralogy 19, 463-477. https://doi.org/10.1127/0935-1221/2007/0019-1746

Laguna de Sopetón (Parque Nacional de Doñana). Fotografía de Miguel Rodríguez-Rodríguez (Universidad Pablo de Olavide, Sevilla).

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Published

2022-12-11

How to Cite

García-Rodríguez, M., Orejana, D., & de Ignacio, C. (2022). Petrography and mineral chemistry of mafic granulites from the Cofrentes volcano: nature of the lower crust under the eastern Iberian Peninsula. GEOGACETA, 72, 35–38. https://doi.org/10.55407/geogaceta98429

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Vol. 72 (2022): July_December

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