Location:

Uranium vein mineralization. Tyndrum, Scotland

At Tyndrum, sphalerite-galena-quartz veins and vein-breccias cut Dalradian metasediments. Minor uraniferous veins are associated with, but postdate, the main base metal mineralization. Quartz, potash feldspar, dolomite, baryte and calcite are the main gangue phases.

Major Minerals:

Uraninite

Minor Minerals:

Chalcopyrite, pyrite, marcasite, galena, safflorite

Trace Minerals:

Tetrahedrite, bornite, argentian chalcocite, argentite, native copper, native silver, haematite

Textures:

Uraninite, as the variety pitchblende, is collomorphic and shows reflectance variations between bands. it is intergrown with calcite that carries numerous fine-grained haematite inclusions. Uraninite is replaced by galena and chalcopyrite, and smaller crystals are replaced by secondary uranium minerals

Reference:

Pattrick, 1985