Weathering processes in waste materials from a mining area in a semiarid zone |
| |
Authors: | Cortes Navarro-Hervás Carmen Pérez-Sirvent María José Martínez-Sánchez Mari Luz García-Lorenzo José Molina |
| |
Institution: | 1. Department of Agricultural Chemistry, Geology and Pedology, Faculty of Chemistry, University of Murcia, Regional Campus of International Excellence “Campus Mare Nostrum”, Campus de Espinardo, 30100 Murcia, Spain;2. Department of Petrology and Geochemistry, Faculty of Geology, Complutense University of Madrid, Spain;3. Department of Geography, University of Murcia, Murcia, Spain |
| |
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 which are still taking place provide an important tool for assessing associated environmental problems in this area. |
| |
Keywords: | |
本文献已被 ScienceDirect 等数据库收录! |
|