Location: |
Settlingstones Mine, North Pennine Orefield |
Major Minerals: |
Galena, sphalerite, niccolite, ullmannite |
Minor Minerals: |
Pyrite, marcasite |
Trace Minerals: |
Include chalcopyrite, skutterudite, gersdorffite, rammelsbergite, bravoite, vaesite, violarite and millerite |
Textures: |
Sphalerite forms cores to radiating niccolite, itself with rims of euhedral to subhedral ullmannite and galena. Sphalerite and galena are intergrown and enclose minor amounts of pyrite, bravoite, marcasite and chalcopyrite. Niccolite has altered along grain boundaries and fractures to rammelsbergite and to fine intergrowths of vaesite, violarite and millerite |
References: |
Russell, 1927; Ixer, 1986 |