1. Chalcopyrite and Bornite are both typically replaced by chalcocite and covellite in the supergene enrichment zone of copper deposits.

2. Chalcopyrite and Bornite are both typically replaced by chalcocite and covellite in the supergene enrichment zone of copper deposits

3. RUSK COUNTY: Bornite is a major component of the supergene enrichment zone at the Flambeau deposit, south of Ladysmith in T.34N R.6W

4. Our conclusion is compatible with the geologic evidence and confirms the supergene hypothesis for the genesis of Tolfa alunites proposed by Fuchs and De Launay (1893) and De Launay (1906; 1913).