Three-Dimensional Distribution of Platinum Group Minerals in Natural MSS-ISS Ores From the Norilsk One Deposit, Russia

The Mt. Rudnaya MSS-ISS (monosulfide and intermediate solid solution) fine-grained ores from a NE termination of Norilsk 1 deposit were analyzed using combination X-ray computed micro tomography, spectral tomography scanning electron microscopy to achieve both, 2D 3D data. consist ISS composed tiny lamellar intergrowths cubanite chalcopyrite solutions, which form up 4-mm distinct globules surrounded by an ISS-MSS matrix. Our results may provide textural evidence possible natural sulfide-sulfide liquid immiscibility between Cu-rich Cu-poor sulfide liquids that occurred before MSS crystallized. platinum group minerals (PGM) distribution shows 20.6 vol% all PGM occur in the matrix 79.4 globules. We suggest this distributional behavior is due fact elements (PGE) cannot be dissolved ISS, led formation large grains, are 120 μm on their longest axis. initial enrichment PGE was controlled differences partition coefficients palladium liquids.