Statistical approach to interpretation of geochemical data of stream sediment in Pleše mining area

The Ba, Pb and Zn ore deposit Pleše near Ljubljana is one of the formerly productive mines. stream sediments were sampled analysed by XRF to establish effect grain size, mineralization, downstream location sampling sites on geochemical composition based various statistical analyses. Statistical analyses data confirm impact mineralization. parametric t-test, non-parametric Mann-Whitney test cluster analysis showed only minor differences in samples with different sizes (< 0.063 mm 0.063-2 mm). correlation coefficients as well indicate that contents Si, Al, K, Rb, Fe are associated weathered rock forming minerals such micas, clay minerals, whereas Nb Zr resistant weathering. Ca Mg carbonates. S, Sr, Pb, Zn, Mn local mineralization sulphates sulphides. results t-test variance, tests Kruskal-Wallis ANOVA groups established Sr have a statistically significant influence classification group - i.e., sediment There no elemental downstream. approach evaluate has proven useful provides good basis for further interpretation.