The largest mercury anomaly of Earth (Almadén, Sapin)a mantle-derived feature?
- Higueras, Pablo
- Oyarzun, Roberto
- Mortata, Diego
- Munhá, Jose
ISSN: 0213-683X
Ano de publicación: 1998
Número: 25
Páxinas: 103-106
Tipo: Artigo
Outras publicacións en: Geogaceta
Resumo
The Almadén Hg deposits are associated with deeply altered magmatic rocks, which main features are briefly described here. Geochemical, including isotopic, data on these rocks suggest that they are derived from deep mantelic sources. The volcanic units underwent low-pressure alteration processes, probably related to the geothermal evolution of the district along with the magmatic activity (Silurian-Devonian). As a conclusion, this magmatism could have been the responsible for the mobilisation of mercury concentrated in the district deposits