Location: |
Alderley Edge, Cheshire, England |
Major Minerals: |
Chalcocite, djurleite, galena, sphalerite, covelline |
Minor Minerals: |
Chalcopyrite, pyrite, marcasite, nickeliferous pyrite, TiO2 minerals |
Trace Minerals: |
Include tetrahedrite, bravoite, haematite, gersdorffite, nickel-cobalt sulpharsenides, detrital ilmenite, magnetite, chromite, zircon |
Textures: |
Authigenic anatase overgrowths occur on detrital TiO2 minerals. Framboidal pyrite, compositionally zoned bravoite, nickeliferous pyrite and rare nickel-cobalt sulpharsenides are inclusions within the primary chalcopyrite-galena-sphalerite pore space cement. Alteration of the primary sulphides is intensive and rhythmically precipitated chalcocite, djurleite and cerussite form a major cement around clastic silicate grains. The alteration of chalcopyrite and sphalerite to secondary copper sulphides is widespread and the copper sulphides are argentian |
Reference: |
Ixer and Vaughan, 1982 |