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Weathering processes in waste materials from a mining area in a semiarid zone

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Navarro Hervás, Cortés and Pérez Sirvent, Carmen and Martínez Sánchez, Maria José and García Lorenzo, Mari Luz and Molina Ruiz, José (2012) Weathering processes in waste materials from a mining area in a semiarid zone. Applied Geochemistry, 27 . pp. 1991-2000. ISSN 0883-2927

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Abstract

Chemical and mineralogical characterization of waste materials present in an abandoned Pb, Zn–Ag mining site (SE, Spain) was carried out. In unaltered rocks, the mineralogy is characterized by plagioclase, pyroxene, magnetite, ilmenite, amphibole, biotite and quartz. Trace-element contents of these samples represent unaltered values. In mine-waste materials, pH ranged from acidic to slightly acidic and trace-element content was generally high, especially for Pb and Zn, although there were also substantial As concentrations. X-ray diffraction results suggested that these samples have a complex mineralogy, including alteration products. Surficial materials in the study area were affected by weathering processes, generating supergene assemblages, including Fe and Mn oxides and hydroxides, carbonates, hydrated sulfates and jarosite. Knowledge of the geochemical processes that took place in the past and whichare still taking place provide an important tool for assessing associated environmental problems in this area.


Item Type:Article
Subjects:Sciences > Geology > Soil science
Sciences > Geology > Petrology
ID Code:59410
Deposited On:09 Mar 2020 08:11
Last Modified:09 Mar 2020 09:38

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