Revisión de la geocronología U-Pb de las carbonatitas del NW de Fuerteventuranuevos datos e implicaciones geológicas

  1. C. de Ignacio 1
  2. J.I. Gil Ibarguchi 2
  3. M. Muñoz 1
  4. J. Sagredo 1
  5. M.E. Sánchez Lorda 2
  1. 1 Universidad Complutense de Madrid
    info

    Universidad Complutense de Madrid

    Madrid, España

    ROR 02p0gd045

  2. 2 Universidad del País Vasco/Euskal Herriko Unibertsitatea
    info

    Universidad del País Vasco/Euskal Herriko Unibertsitatea

    Lejona, España

    ROR https://ror.org/000xsnr85

Zeitschrift:
Geotemas (Madrid)

ISSN: 1576-5172

Datum der Publikation: 2016

Titel der Ausgabe: IX CONGRESO GEOLÓGICO DE ESPAÑA

Nummer: 16

Seiten: 435-438

Art: Artikel

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Andere Publikationen in: Geotemas (Madrid)

Zusammenfassung

In this work, new U-Pb zircon ages in carbonatites from the NW sector of Fuerteventura are presented. The zircons show textural and compositional characteristics indicating its igneous origin and its crystallization from carbonatitic magmas. The obtained age, 24.2 ± 0.3 Ma, is slightly younger than the existing age for carbonatites in the central-western sector of the island. Therefore, we propose that at least two alkaline-carbonatitic intrusions would have been emplaced in a rift zone, with a certain degree of time migration from SW to NE. In addition, this age constrains the alkaline-carbonatitic magmatic episode in the island to an almost virtually 1 Ma span. However, this time lapse is meaningful, as it represents the consequence to the changes underwent by the African plate in its divergent movement with respect to South America and its convergence with Eurasia.

Fuente de los datos: Dialnet