Location:

Base metal-tin association. Nigadoo River, New Brunswick, Canada

Major Minerals:

Pyrrhotite, pyrite, sphalerite, arsenopyrite, galena

Minor Minerals:

Stannite group minerals, marcasite, chalcopyrite, cassiterite, argentite, tetrahedrite

Trace Minerals:

Include rutile, dyscrasite, pyrargyrite, native bismuth, native antimony, boulangerite, jamesonite, mackinawite, bournonite

Textures:

Prismatic and acicular cassiterite is unzoned and untwinned. Euhedral arsenopyrite is replaced by pyrrhotite, chalcopyrite, galena and sphalerite. Chalcopyrite encloses mackinawite and exsolved sphalerite stars. Sphalerite has a number of generations and encloses stannite and tetrahedrite inclusions and has suffered from chalcopyrite disease. It is rimmed by stannite group minerals, especially at sphalerite-chalcopyrite junctions. Galena encloses native bismuth and silver sulphosalt inclusions. Pyrrhotite is extensively altered to Pyrite and marcasite giving bird's-eye textures and lath-shaped intergrowths parallel to (0001) planes of pyrrhotite

Reference:

Suensilpong and Stumpfl, 1971