RT Journal Article
T1 Relationships between hydrogeochemistry and diatoms in acid mine drainage affected media: The case of Iberian pyrite belt; functioning models for an all metallogenetic province
A1 Luís, Ana Teresa
A1 Fortes Garrido, Juan Carlos
A1 Santisteban Fernández, María
A1 Dávila Martín, José Miguel
A1 Caraballo Monge, Manuel Antonio
A1 Terrones Saeta, Juan María
A1 Díaz Curiel, Jesús
A1 Grande Gil, José Antonio
AB The Iberian Pyritic Belt (IPB) is one of the most important metallogenic provinces, which hosts massive sulfides and extends over 230 km from Canal Caveira-Lousal in Portugal to Gerena (near Seville) in Spain. It has 88 active and inactive mines only in the Spanish part and near 30 in Portugal that generate Acid Mine Drainage (AMD) pollution to the main river basins, Corona, Roxo (Portugal), Odiel, Tinto, Guadiamar (Spain) and Chanza- Guadiana (Portugal/Spain) and consequenty to the 35 acidic sampling sites, 14 in Portugal and 21 in Spain, selected for this unique study. The physico-chemical parameters of waters (EC, Eh, pH, Al, As, Cd, Co, Cu, Fe, Mn, Ni, Pb, Zn, SO42- ), acidic diatoms (%Pinacid) and diatom diversity (Nºsps) were determined in the laboratory. Then, the results were integrated in a database with 16 variables and 35 sampling points to be statistically analyzed by factor and cluster analysis. In the first, for the 35 sampling sites, it showed a clear inexistence of ecological barriers, exposing how could distantly sampling points be paired together. The last, allowed the pollution–biota interaction models formulation governed by 2 factors: 1-Unrestored Mining Surfaces and 2-WFD (Water Framework Directive) exceeding limits. Dispersion diagram showed that although the unrestored mining surface increases, starting from a certain concentration of contaminants, salts begin to precipitate: the AMD process increases but the WFD does not. There are numerous works in the scientific literature aimed to define diatom-hydro-geo-chemistry interrelationships, but none that covers an entire metallogenetic province where ecological barriers could exist, conditioning the diatom species and groups evolution and distribution in an acidic (pH: 1.90–4.43) environment.
PB Elsevier
SN 0375-6742
SN 1879-1689 (electrónico)
YR 2024
FD 2024-06
LK https://hdl.handle.net/10272/25514
UL https://hdl.handle.net/10272/25514
LA eng
NO Luís, A. T., Fortes, J. C., Santisteban, M., Dávila, J. M., Caraballo, M. A., Terrones-Saeta, J. M., Diaz-Curiel, J., & Grande, J. A. (2024). Relationships between hydrogeochemistry and diatoms in acid mine drainage affected media: The case of Iberian pyrite belt; functioning models for an all metallogenetic province. Journal of Geochemical Exploration, 264, 107537. https://doi.org/10.1016/j.gexplo.2024.107537
NO The authors are grateful to the Sustainable Mining Engineering Research Group, Department of Mining, Mechanic, Energetic and Construction Engineering of the Higher Technical School of Engineering, University of Huelva, Spain and to the Department of Geosciences of the University of Aveiro, Portugal for making possible the field, laboratory and writing works that conducted to the elaboration of the present research article.
DS Repositorio Institucional de la Universidad de Huelva
RD 1 jun 2026