Typical colloform banding at the Don Guillermo vein. Banded silica zones host gold mineralisation in low sulphuration epithermal veins, and are located below bladed calcite zones formed by boiling.
Typical colloform banding at the Don Guillermo vein. Banded silica zones host gold mineralisation in low sulphuration epithermal veins, and are located below bladed calcite zones formed by boiling.