Location: |
Mount Gabriel, County Cork, Ireland |
Major Minerals: |
Digenite, bornite, chalcocite, djurleite, blaubleibender covelline, malachite |
Minor Minerals: |
TiO2 minerals, covelline, cuprite, carbonaceous matter |
Trace Minerals: |
Include pyrite, chalcopyrite, haematite, acanthite, native copper |
Textures: |
Detrital TiO2 mineral grains have euhedral TiO2 mineral overgrowths. Detrital haematite is absent and secondary haematite is rare. Copper sulphides form cements around euhedral silicates or lie along the cleavage of chlorite-muscovite. Coarser grained copper sulphides lie along cross-cutting veinlets and joint planes. Bornite is replaced by djurleite and chalcocite along (100) crystallographic planes. Digenite is replaced along its cleavage by covelline and blaubleibender covelline. Locally, chalcocite-djurleite carries discrete silver-rich inclusions that are photosensitive |
References: |
Reilly, 1986; Ixer, 1987 |