Mapa de anomalía de Bouguer del Pirineo Suroccidental

  1. E.L. Pueyo 1
  2. F.M. Rubio 1
  3. R. Toro 2
  4. A. González 1
  5. J.M. Llorente 1
  6. L. Ezquerro
  7. A. Montañés
  8. C. Rey 1
  9. P. Santolaria 3
  10. C. Ayala 1
  11. A.M. Casas 4
  12. E. Izquierdo-Llavall 5
  13. J. Giménez 2
  14. C. Pérez-Bielsa 1
  15. R. Soto 1
  16. P. Clariana 1
  17. O. Pueyo-Anchuela 4
  18. B. Oliva-Urcia 6
  1. 1 Instituto Geológico y Minero de España
    info

    Instituto Geológico y Minero de España

    Madrid, España

    ROR https://ror.org/04cadha73

  2. 2 Geotransfer. Dpto. Ciencias de la Tierra. IUCA. Univ. de Zaragoza
  3. 3 Geomodels Research Institute, Universitat de Barcelona
  4. 4 Unidad Asociada en Ciencias de la Tierra IGME/Universidad de Zaragoza
  5. 5 E2S-UPPA, UPPA-CNRS-Total, Université de Pau et des Pays de l’Adour, Pau, France
  6. 6 Universidad Autónoma de Madrid
    info

    Universidad Autónoma de Madrid

    Madrid, España

    ROR https://ror.org/01cby8j38

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Revue:
Geotemas (Madrid)

ISSN: 1576-5172

Année de publication: 2021

Titre de la publication: X Congreso Geológico de España

Número: 18

Pages: 560

Type: Article

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D'autres publications dans: Geotemas (Madrid)

Résumé

The geometric and kinematic relationships between the basement thrust sheets in the Southwestern Pyrenees, specifically between the pinch out of the Axial Zone and the outcrop of the isolated Basque Massifs, are unknown and potentially very complex (Oliva-Urcia, 2018). Gravimetric surveying has been successfully conducted in other Pyrenean regions to unravel the geometry of cover/basement units due to the proven density contrast of the involved rocks. Aiming to solve its geometry, with direct implications in the 4D understanding of this part of the Pyrenees, we have carried out a thorough gravimetric data acquisition program (2018-2020) between the Salazar (to the West) and the Aragón Subordán valleys (to the East) in the frame of the 3DGeoEU project (GeoERA-H2020). More than 1500 new stations (several of them in high mountain areas) together with > 1700 previous points from the SITOPO database, ≈ 1200 from mining campaigns, and > 500 from previous IGME projects give a total of >5000 harmonized gravimetric stations. Additionally, > 500 density data were compiled from databases or sampled in the field. In this presentation we will introduce the resulting Bouguer and residual anomaly maps together with a reviewed hierarchized map of the main structural features in the area.

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