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High Resolution Electrical Resistivity Tomography Imaging of a Coastal Mine Tailings Deposit, Portman Bay, SE Spain
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 25th European Meeting of Environmental and Engineering Geophysics, Sep 2019, Volume 2019, p.1 - 5
Abstract
The Portman bay (SE of Spain) was infilled with mineral tailing for 33 years by the mine industry that operated in the area. What was a clean crescent-shaped bay in the year 1957 had disappeared by 1990 under 60 Mt of dumped waste. In this study we propose the use of electrical resistivity tomography (ERT) for the characterization of the mineral tailings that infilled the bay.
Two field data acquisitions were performed obtaining regional and detailed ERT data. The combination of this acquired data with boreholes and historical aerial photography has allowed to generate a 3D integrated model of the mineral tailing infill. This detailed model suggests a 44% increment of the volume of the infill from previous studies. Furthermore, a dense ERT grid was acquired and yielded a meter-scale resolution model of the internal heterogeneities.