2026-06-08T04:37:50Zhttps://docta.ucm.es/rest/oai/requestoai:docta.ucm.es:20.500.14352/342682024-07-19T18:29:13Zcom_20.500.14352_14col_20.500.14352_15
Docta Complutense
author
García Lorenzo, María de la Luz
author
Martínez Sánchez, María José
author
Pérez Sirvent, Carmen
author
Agudo, Inés
author
Recio, Clemente
2023-06-19T13:41:21Z
2023-06-19T13:41:21Z
2014-12
0883-2927
10.1016/j.apgeochem.2014.10.002
https://hdl.handle.net/20.500.14352/34268
https://www.sciencedirect.com/journal/applied-geochemistry/vol/51/suppl/C
https://www.elsevier.com/locate/apgeochem
The objective of this work was to evaluate processes affecting waters from Portman Bay by way of stable isotopic analysis, particularly H and O stable isotopes from water and S and O from dissolved sulfates. In addition, surface waters from Sierra Minera were examined for the purpose of determining if these waters are affected by similar processes. The results obtained indicate that Portman Bay waters are meteoric, and marine infiltration only takes place in the deepest layers near the shore or if water remains stagnated in sediments with low permeability. The main source of sulfate was the oxidation of sulfides, resulting in the liberation of acid, sulfate and metals. In order to assess the mechanism responsible for sulfide oxidation, the stoichiometric isotope balance model and the general isotope balance model were tested, suggesting that the oxidation via Fe3+ was predominant in the surface, and controlled by Acidithiobacillus ferrooxidans, while at depth, sulfate reduction occurred.
eng
Isotope geochemistry of waters affected by mining activities in Sierra Minera and Portman Bay (SE, Spain)
journal article
URL
https://docta.ucm.es/bitstreams/40c8eab0-c023-4ea6-9c86-7da5767db41b/download
File
MD5
01afdcda1902972641a9ee352c5fd3b7
1823801
application/pdf
Isotope geochemistry of waters.pdf