『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.』
1. Introduction
2. Study area
2.1. Location
2.2. Geological setting
3. Materials and methods
3.1. Unaltered/host rocks
3.2. Mine waste
3.3. sample preparation and analysis
3.4. Statistical analysis
4. Results and discussion
4.1. Unaltered rocks
4.2. Mine waster materials
4.3. Relationship between major elements and mineralogical composition
4.4. Geochemical behavior of the major elements
4.5. Relationship between total trace element content and mineralogical
composition
5. Conclusions
Acknowledgment
References