El registro sedimentario antropoceno en la Ría del Nalón (Asturias)impacto histórico de la minería de carbón y mercurio
- J. Gardoki 1
- A. Cearreta 1
- A. García-Artola 1
- M.J. Irabien 1
- J.E. Gómez-Arozamena 2
- V. Villasante-Marcos 3
- 1 Universidad del País Vasco (UPV/EHU)
-
2
Universidad de Cantabria
info
-
3
Instituto Geográfico Nacional
info
ISSN: 1576-5172
Année de publication: 2021
Titre de la publication: X Congreso Geológico de España
Número: 18
Pages: 1007
Type: Article
D'autres publications dans: Geotemas (Madrid)
Résumé
The recent sedimentary record of the Nalón estuary (Asturias) is characterized by a relevant anthropogenic imprint, deri- ved from the historical extraction of coal and mercury, particularly since 1850 (García-Ordiales et al., 2017; 2018; 2020). Nevertheless, the microfaunal response to environmental stress provoked by the anthropic pollution in this estuary remains unstudied. This work focuses on the multidisciplinary analysis (benthic foraminifera, sedimentology, geochemistry and envi- ronmental magnetism) of two 50-cm long intertidal cores drilled in the middle estuary that were dated by short-lived radioi- sotopes. The multidisciplinary study of its sedimentary record and the establishment of an accurate chronology have allowed a reconstruction of the environmental transformation of the estuary during the last 200 years as a consequence of the mining activity in its watershed.