Arsenopyrite Weathering Products in Barruecopardo Mine Tailings (Salamanca, pain)
Mining and ore processing, where tungsten is associated with arsenopyrite (FeAsS), produce As-rich mine wastes. Oxidation of arsenopyrite can result in the mobilization and migration of As from these wastes into the environment. This study considers the arsenopyriterich mine wastes that have undergone more than two decades of oxidation in the Barruecopardo ore deposit (exploited during several decades). This deposit is one of the most important tungsten deposits in Spain. It is constituted by subvertical quartz veins disposed in parallel intragranitic bands. The main minerals present are: scheelite and wolframite, that constitute the ore, arsenopyrite, pyrite, chalcopyrite and ilmenite, as primary minerals, and tungstite, scorodite, melanterite and calcantite, as secondary minerals. These minerals appear in the veins and on the borders of granite (Pellitero, 1981). The aim of this work is to identify the arsenopyrite oxidation products in order to evaluate if this toxic element is fixed by them or, on the contrary, is easily released from them, likely causing the contamination of surrounding ecosystem compartments.
| Main Authors: | , , , , , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Sociedad Española de Mineralogía
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| Subjects: | Arsenopirita, Oxidación, Escorodita, Oxihidróxidos de Fe., Óxidos de Fe hidratados, Barruecopardo, Arsenopyrite, Oxidation, Scorodite, Fe-Oxihydroxides, Hydrated Fe oxides, |
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