Bornite


Composition: Cu5FeS4
Crystal System : Orthorhombic
Lustre : Metallic
Hardness (H) : 3
Specific Gravity (S.G) : 5.06-5.09

Distribution

Common. Widespread througout the deposit but increasingly so at depth and, locally, an important copper ore mineral.

Occurrence

  • Hypogene
  • 1st Oxidation Zone
  • 2nd Oxidation Zone
  • 3rd Oxidation Zone

Paragenetic and General Notes

Lombaard et al. (1986) considered bornite to have formed in the middle stages of hypogene mineralisation, and to be more or less coeval with tennantite.