10cm band of semi-solid chalcopyrite – hematite – pyrite replacement in host rock phonolite which is completely replaced by hydrothermal biotite, carbonate, magnetite and fluorite. This replacement mineralization is elevated La, Ce, Y and P and exemplifies copper deposition by IOCG-affinity fluids within the high temperature hydrothermal system at Hecla-Kilmer. Drill hole HK20-002, 224 m.
10cm band of semi-solid chalcopyrite – hematite – pyrite replacement in host rock phonolite which is completely replaced by hydrothermal biotite, carbonate, magnetite and fluorite. This replacement mineralization is elevated La, Ce, Y and P and exemplifies copper deposition by IOCG-affinity fluids within the high temperature hydrothermal system at Hecla-Kilmer. Drill hole HK20-002, 224 m.