Cadia Group

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

Names and other identifiers

GMRAP ID 5005
Tract name Macquarie (009pCu8002)
Group name Cadia Group
Included sites 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 Group

Geographic location

Country Australia
State or province New South Wales
Geographic location 148.999, -33.451
Geologic map unit 148.999, -33.451
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 456
Age determination method U-Pb zircon
Age range 466–438 Ma
Age reference Wilson, Cooke, Stein, and others (2007, p. 8, 14)
Minerals actinolite, calcite, chalcopyrite, chorite, epidote, hematite, magnetite, sericite
Associated rocks limestone in shoshonitic volcaniclastic and sedimentary rocks, shoshonitic monzonite, clinopyroxene-hornblende quartz monzodiorite, and quartz monzonite porphyries
Tectonic setting island arc
Stratigraphic age Early Silurian

Commodity and development information

Development status Producer
Major commodities Cu, Au
Minor commodities Ag
Tonnage (Mt) 3,448Mt
Cu grade (%) 0.28%
Au grade (g/t) 0.44g/t
Ag grade (g/t) 0.36g/t
Contained copper 9,700,000t
Gold-Moly ratio -9999

Reference information

Comments This group record includes data for the 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; as such, the location information has been generalized, and the total weighted average resource data represent the seven deposits in the group.
Study area name Australia
References Forster and others (2004); Holliday and others (2002); Cooke and others (2007); Wilson, Cooke, Harper and Deyell (2007); Wilson, Cooke, Stein, and others (2007); Geoscience Australia (2010), Wilson and others (2003); Collett (2007)
Site reference Bookstrom and others (2014)
Forster, D.B., Seccombe, P.K., and Phillips, David, 2004, Controls on skarn mineralization and alteration at the Cadia deposits, New South Wales, Australia: Economic Geology, v. 99, p. 761–788. (Also available at http://dx.doi.org/10.2113/gsecongeo.99.4.761.)Holliday, 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 http://dx.doi.org/10.1007/s00126-001-0233-8.)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 http://dx.doi.org/10.1080/08120090601146771.)Wilson, A.J., Cooke, D.R., Harper, B.J., and Deyell, C.L., 2007, Sulfur isotopic zonation in the Cadia district, southeastern Australia—Exploration significance and implications for the genesis of alkalic porphyry gold-copper deposits: Mineralium Deposita, v. 42, p. 465–487. (Also available at http://dx.doi.org/10.1007/s00126-006-0071-9.)Wilson, 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 http://dx.doi.org/10.2113/gsecongeo.102.1.3.)Collett, Dean, 2007, The Cadia East deposit—Ensuring at least another 30 years mining at Cadia Valley, in Mines and Wines Symposium—Mineral Exploration in the Tasmanides, Orange, New South Wales, September 20–21, 2007, Proceedings: Australian Institute of Geoscientists Bulletin 46, p. 31, and Sydney Mineral Exploration Discussion Group presentation, 14 p., accessed September 3, 2013, at http://smedg.org.au/M&W07/Dean%20Collet%20-%20Cadia%20East%20Deposit.pdf.