This has been complemented by the discovery of a suite of primary minerals which are uncommon in the Mississippi Valley type deposits of the north Pennines including bournonite, millerite, strontianite, ullmannite
, and (perhaps) hydromagnesite.
chalcopyrite, pentlandite, pyrite, cobaltite-gersdorffite series, arsenopyrite, ullmannite
, violarite, chromite, ilmenite, sphalerite, covellite, argentopentlandite, breithauptite, marcasite, nickeline, galena, rutile, barite, hessite, Au-Ag alloys, sperrylite, moncheite, sudburyite, testibiopalladite, kotulskite, mertieite-II, stibiopalladinite, geversite, melonite and four undefined minerals.
Tetrahedrite also has been identified as sparse, black masses to 2 mm in dense, gray quartz in a second specimen collected from the underground workings, and silver-bearing tetrahedrite occurs as a trace constitute in the altered metasedimentary rocks with pyrrhotite, chalcopyrite and ullmannite