The primary copper minerals are malachite, chrysocolla, chalcocite as well as rare covellite and chalcopyrite occur as disseminations, in quartz veinlets and along fractures primarily hosted in potassic and phyllic-altered Laramide age quartz monzonite.

Source: https://investingnews.com/copper-fox-provides-partial-analytical-results-for-2022-metallurgical-drilling-program-at-schaft-creek-project/

The strong copper sulphide dominant mineralisation was encountered where the skarn is in contact with the quartz monzonite porphyry.

Source: https://investingnews.com/238moz-of-indium-and-119koz-of-gold-in-updated-jorc-mineral-resource-for-west-desert-usa/