## 3 Results and Discussion
### Analysis of Tailings Fractions
For this fraction, the contents of biotite and calcite were very low (<2%). The content of quartz was \(\sim\)27%, and clinochore \(\sim\)3%. In this fraction, pyrite was not detected. The content of biotite was the highest in the fraction \(-400+300\) um. However, this fraction contained a significant amount of quartz (\(\sim\)36%) and clinochore (-26%). The content of pyrite was very low (0.03%). This fraction contained albite \(\sim\)20% and calcite about 5%. In other fractions in the range \(-200+63\) um, the largest amount of quartz was detected (averaged \(\sim\)35%). The average amount of albite was \(\sim\) 27%, calcite about 11%, and biotite about 9.5%. Considering that the results presented in Table 4 show that the most prevalent are fractions \(-200+100\), \(-100+63\) and \(-63+0\) um (in total 95.53%), it can be concluded that the extraction of useful minerals will be cost-effective only from these three fractions. For the JOF sample, the following fractions were analyzed: \(-63+0\) um, \(-100+63\) um, \(-200+100\) um, \(-300+200\) um, \(-400+300\) um and \(+400\) um, and results are given in Figure 5 and Tables 5 and S3. From Figure 5, it is evident that after fractionization of the JOF sample, the content of detected mineral phases significantly changed. The composition of individual fractions differs from the others. From Figure 5b, it is clear that the content of calcite increases for lower particle size in comparison with the starting JOF sample. For the fractions \(-63+0\) um and \(-100+63\) um, the calcite content was \(\sim\)22%, and maximal calcite content was obtained in the fraction \(-200+100\) um (\(\sim\)52%). In other fractions (+200 um), the content of the calcite was much lower, in the range \(\sim\)1-6%. The content of albite in all fractions in the range \(-400+0\) um was lower in comparison with the starting sample (Figure 2b, 28.15%) and only in fraction \(+400\) um was a significantly higher amount of this mineral detected (\(\sim\)45%). The samples with a particle size of \(-300+0\) um contained smaller amounts of biotite than the starting sample (maximal 7.71%). In fractions with a particle size of +200 um, significantly larger quantities of this mineral were detected (\(\sim\)12% for the fraction \(-400+300\) um and \(\sim\)15% for the fraction +400 um). The quartz content varied in the range of 10-50%, while that of pyrite to a maximum of 5%, and the clinochore content \begin{table}
\begin{tabular}{c c c c} \hline
**Phase** & **JKB \(-\)10 + 0 μm** & **JOF \(-\)10 + 0 μm** & **JPH \(-\)10 + 0 μm** \\ \hline Quarz; SiO\({}_{2}\) & \(f\) = 7.51 & \(f\) = 6.84 & \(f\) = 7.35 \\ Pyrite; FeS\({}_{2}\) & \(f\) = 1.30 & \(f\) = 1.13 & \(f\) = 0.42 \\ _Cubic_ & & & \\ Clincholore; & & & \\ Mg\({}_{2.5}\)Fe\({}_{1.65}\)Al\({}_{1.5}\)Si\({}_{2.2}\)Al\({}_{1.18}\)O\({}_{10}\)(OH)\({}_{8}\) & \(f\) = 37.65 & \(f\) = 42.09 & \(f\) = 47.59 \\ Calcite; CaCOO\({}_{3}\) & \(f\) = 9.45 & \(f\) = 14.17 & \(f\) = 10.87 \\ Albite; Na (AlSi\({}_{3}\)O\({}_{8}\)) & \(f\) = 40.13 & \(f\) = 27.44 & \(f\) = 33.47 \\ Biotite; & & & \\ K\({}_{2}\)(Mg\({}_{3.15}\)Fe\({}_{2.59}\)Ti\({}_{0.17}\)Mn\({}_{0.09}\)) & \(f\) = 3.96 & \(f\) = 8.33 & \(f\) = 0.30 \\ (Si\({}_{5.98}\)Al\({}_{1.92}\)Ti\({}_{0.10}\))O\({}_{20}\) ((OH)\({}_{1.47}\)F\({}_{1.98}\)) & & & \\ \hline \end{tabular}
\end{table} 
Table 7: The percentages of individual crystal phases (\(f\)/%), obtained using the software package Powder Cell, of examined samples in the fraction \(-10+0\) μm. varied in the range of 13 to 42%. Considering the results presented in Table 5, the most prevalent are fractions \(-300+200\), \(-200+100\), \(-100+63\) and \(-63+0\) um (in total 92%), and the extraction of useful minerals will be cost-effective only from these three fractions. For the JHC sample, fractions \(63+0\), \(-100+63\) and \(-200+100\) um were analyzed. As can be seen from the results presented in Table 6, there are no particles in the particle size range +400, \(-400+300\) and \(-300+200\) um.