Cadia Hill open pit

Porphyry copper (Cu-Au) deposit in New South Wales, Australia

Names and other identifiers

Alternate names Cadia Hill
Tract name Macquarie (009pCu8002)
Group name Cadia Group
Included sites Group includes Big Cadia, Cadia East open pit, Cadia East underground, Cadia Far East, Cadia Hill open pit, Cadia Quarry, and Ridgeway deposits and Little Cadia prospect.
Site status deposit

Geographic location

Country Australia
State or province New South Wales
Geographic location 148.9957, -33.4574
Geologic map unit 148.9957, -33.4574
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 443Ma
Age determination method Re-Os molybdenite
Age range 443.0 ±1.5 Ma, 442.9 ±1.4 Ma (Re-Os); 435.9 ±3.7 Ma (U-Pb)
Age reference Wilson, Cooke, Stein, and others (2007, p. 8, 14)
Minerals albite, biotite, bornite, chalcopyrite, chlorite, gold, K-feldspar, magnetite, molybdenite, pyrite
Associated rocks volcanic rocks, shoshonitic volcanic and volcaniclastic rocks, shoshonitic diorite, monzonite, monzodiorite, and quartz monzonite porphyries
Tectonic setting island arc
Stratigraphic age Late Ordovician–Early Silurian

Commodity and development information

Development status Prospect
Major commodities Au, Cu
Tonnage (Mt) 490Mt
Cu grade (%) 0.1168%
Au grade (g/t) 0.204g/t
Contained copper 573,700t
Gold-Moly ratio -9999

Reference information

Comments Location, tonnage and grade of measured + indicated + inferred resources from Geoscience Australia (2010). Quartz-Cu-Fe-S stockworks, sheeted quartz veins.
Study area name Australia
References Holliday and others (2002); Fredricksen (2006); Cooke and others (2007); Wilson, Cooke, Stein, and others (2007); Geoscience Australia (2010)
Site reference Bookstrom and others (2014)
Cooke, D.R., Wilson, A.J., House, M.J., Wolfe, R.C., Walshe, J.L., Lickfold, Vanessa., and Crawford, A.J., 2007, Alkalic porphyry Au-Cu and associated mineral deposits of the Ordovician to Early Silurian Macquarie arc, New South Wales: Australian Journal of Earth Sciences, v. 54, p. 445–463. (Also available at, Dean, 2006, Sustainable gold and copper production, Cadia Valley operations, in Mines and Wines Symposium—Mineral Exploration in New South Wales, Cessnock, Australia, May 25–26, 2006, Proceedings: Sydney Mineral Exploration Discussion Group, 36 slides, accessed September 3, 2013, at (Also available at Australia, 2010, Australian mines atlas: Geoscience Australia Web page accessed October 20–December 27, 2010, at, J.R., Wilson, A.J., Blevin, P.L., Tedder, I.J., Dunham, P.D., and Pfitzner, Michael, 2002, Porphyry gold-copper mineralization in the Cadia district, eastern Lachlan fold felt, New South Wales, and its relationship to shoshonitic magmatism: Mineralium Deposita, v. 37, p. 100–116. (Also available at, A.J., Cooke, D.R., Stein, H.J., Fanning, M.C., Holliday, J.R., and Tedder, I.J., 2007, U-Pb and Re-Os geochronologic evidence for two alkalic porphyry ore-forming events in the Cadia district, New South Wales, Australia: Economic Geology, v.102, p. 3–26. (Also available at