RE:ChalcociteEscondida, which is a giant hypogene open pit porphyry in Chile has the Chalcocite layer on top and the potassic core Chalcopyrite/Bornite layer beneath. Source: https://portergeo.com.au/database/mineinfo-mb.asp?mineid=mn204
GoldGravy on ceo has posted photos of the different mineralization layers.
Bingham Canyon Mine (Utah, USA) has Chalcocite within the Chalcopyrite zone within its center Source: https://portergeo.com.au/database/mineinfo-mb.asp?mineid=mn211