Sample ID | Concentration of Fe2O3 in original samples (%) | Concentration of Fe2O3 in leached samples (ppm) |
Certified sample (MA-1a) | 5.34 | 0.50 |
S1 (carbonate) | 9.00 | 0.80 |
S3 (carbonate) | 8.50 | 0.65 |
Pyrite (sulphide) | 90.8 | 10.0 |
Serpentine (silicate) | 5.50 | 1.00 |