Publication date: December 2015
Source:Geoderma, Volumes 259–260
Author(s): M.B. Rivera , J.C. Fernández-Caliani , M.I. Giráldez
The chestnut grove soils of the Sierra de Aracena Natural Park (SW Spain) are a striking example of geoavailability and pedochemical enrichment with geologically-sourced trace elements, notably Zn, Pb, Ag and Cd, but also As, Sb, Cu and Tl. The data from this study provide evidence that such metal(loid)s were originally bound to reactive sulphides (pyrite, sphalerite and galena) and Ag–Sb–(Pb) sulfosalts residing in the soil parent rock. At the early stages of weathering, these geoavailable elements were easily liberated from the mineralised bedrock through oxidative dissolution reactions, and then transferred to the soil, thus reaching anomalously high concentrations. The most extreme amounts of Zn (12–26
Source:Geoderma, Volumes 259–260
Author(s): M.B. Rivera , J.C. Fernández-Caliani , M.I. Giráldez