Petrology and geochemical modeling (Ba-W-Sn) of the Peña do Seo granitoids (West Asturian-Leonese Zone, León, Spain)

Authors

  • Pablo Caldevilla Domínguez Departamento de Tecnología Minera, Topografía y de Estructuras, Universidad de León.
  • Luis González-Menéndez IGME-CSIC, Unidad de León.
  • Alba Lozano Departamento de Tecnología Minera, Topografía y de Estructuras, Universidad de León.
  • Fernando Gómez-Fernández Departamento de Tecnología Minera, Topografía y de Estructuras, Universidad de León.
  • Ana María Castañón Departamento de Tecnología Minera, Topografía y de Estructuras, Universidad de León.

DOI:

https://doi.org/10.55407/geogaceta98144

Keywords:

Peña do Seo, granites, partial melting, geochemical modelling, dehydration

Abstract

The Cadafresnas granites and granitoid breccias (Peña do Seo, W of León) are small post-tectonic stocks of Variscan age related to W-Sn mineralizations. According to their mineralogical geochemical characteristics, they are classified as granites-syenogranites, granodiorites and granitoids rich in quartz, of peraluminous/metaluminous composition. The Rb-Ba-Sr relationships allow assigning a metapelitic source for the granites and a metagreywacke source for the granitoid breccias. Using geochemical modeling (partial melting), the contribution of these sources to explain the Ba, W and Sn contents of the granites and granite breccias is investigated. The results indicate that the partial melting of these lithologies explains part of the content of these elements in the studied rocks, requiring additional processes of fractional crystallization and/or hydrothermal injections.

References

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Panorámica de Los Pirineos (foto portada)

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Published

2023-12-18

How to Cite

Caldevilla Domínguez, P., González-Menéndez, L., Lozano, A., Gómez-Fernández, F., & Castañón, A. M. (2023). Petrology and geochemical modeling (Ba-W-Sn) of the Peña do Seo granitoids (West Asturian-Leonese Zone, León, Spain). GEOGACETA, 74, 43–46. https://doi.org/10.55407/geogaceta98144

Issue

Vol. 74 (2023): July-December

Section

Artículos

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Copyright (c) 2023 Pablo Caldevilla Domínguez, Luis González-Menéndez, Alba Lozano, Fernando Gómez-Fernández, Ana María Castañón

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