LEAD AND SULFUR ISOTOPE-DILUTION DURING DISPERSION FROM THE FALUN MINING AREA

Sulphur and lead isotopes in water and sediments have been measured in the river Dalalven system. The river receives sulphate from two princ iple sources; atmospheric deposition in the river drainage area and co ntinuously weathered sulphide rich mine waste. Lead in the sediments o riginates from both the ambient geological materials, as well as from the mine waste. Mixing models were applied to both sulphur and lead is otopes. The results demonstrate that it is possible to define and quan tify the emission sources and dispersions in a receiving water body an d its sediments.