Metapelitas de alta presión de la Unidad de Badajoz-Córdoba (Macizo Ibérico)la sutura del Devónico Superior del Orógeno Varisco

  1. R. Arenas 1
  2. I. Novo-Fernández 1
  3. A. García-Casco 2
  4. R. Díez Fernández 3
  5. J.M. Fuenlabrada 1
  6. M.F. Pereira 4
  7. J. Abati 1
  8. S. Sánchez Martínez 1
  9. F.J. Rubio Pascual 3
  1. 1 Universidad Complutense de Madrid

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  2. 2 Universidad de Granada

    Universidad de Granada

    Granada, España


  3. 3 Instituto Geológico y Minero de España

    Instituto Geológico y Minero de España

    Madrid, España


  4. 4 Universidade de Évora

    Universidade de Évora

    Évora, Portugal


Geotemas (Madrid)

ISSN: 1576-5172

Year of publication: 2021

Issue Title: X Congreso Geológico de España

Issue: 18

Pages: 394

Type: Article

More publications in: Geotemas (Madrid)


The Badajoz-Córdoba Unit (BCU) represents a high-P terrane mainly constituted by metapelites, metagreywackes, orthog- neisses, Grt-amphibolites and highly retrogressed eclogites. The high-P metamorphic event has been dated at c. 377 Ma. Rare metapelites with well-preserved high-P mineral assemblages have been discovered in the unit. They appear as foliated white-colored rocks, in which large pinkish-red garnets up to 1 cm in diameter with abundant inclusions stand out. The mine- ral assemblage of these metapelites includes garnet, chloritoid (up to XMg = 0.32), kyanite, staurolite, chlorite, phengite (up to Si = 3.16 apfu), paragonite, margarite and rutile. Pseudosection modelling of representative samples indicates that this mineral assemblage formed during a first high-P metamorphic event at P> 20 kbar and T= c. 525°C (blueschist-eclogite facies), followed by a severe exhumation with moderate heating. The BCU can be correlate with other equivalents high-P and low-intermediate-T units in the Iberian Massif, and also all along the Variscan Orogen from Iberia to the Bohemian Massif.