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Spatial distribution and sources of trace elements in sediments affected by old mining activities
Mari Luz García-Lorenzo1, Carmen Pérez-Sirvent, María José Martínez-Sánchez
1Department of Petrology and Geochemistry, Faculty of Geology, Complutense University of Madrid, Ciudad Universitaria, 28040 Madrid, Spain. mglorenzo@geo.ucm.es
Environmental Monitoring and Assessment
|December 29, 2011
Summary
Abandoned mine tailings are a significant source of trace element pollution. This study mapped contamination hotspots and identified pollution sources using a multi-scale approach and geographic information system (GIS) analysis.
Area of Science:
- Environmental Science
- Geochemistry
- Environmental Pollution
Background:
- Abandoned mine tailings pose environmental risks due to trace element distribution.
- Understanding spatial variation is crucial for managing pollution from mining activities.
Purpose of the Study:
- To analyze the spatial variation of trace elements in a mining area.
- To identify the sources of trace element pollution.
- To establish a conceptual model for trace element dispersion.
Main Methods:
- A three-step study was conducted at regional, local, and detailed scales.
- Trace element distribution was analyzed across different scales.
- A geographic information system (GIS) was used to model and confirm trace element dispersion.
Main Results:
- Identified points affected by primary, secondary, and tertiary contamination.
- Contamination levels were correlated with proximity to pollution sources.
- Attenuation processes influencing trace element spread were assessed.
Conclusions:
- The multi-scale approach effectively mapped trace element contamination.
- GIS modeling confirmed the conceptual dispersion model.
- The study provides a framework for assessing and managing pollution from mining sites.
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