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Cadia East open pit

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

Names and other identifiers

GMRAP ID 4044
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 149.009316, -33.462505
Geologic map unit 149.009316, -33.462505
Nearby data
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Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 441.8Ma
Age determination method Re-Os molybdenite
Age range 441.8 ±1.4 Ma (Re-Os); 451.0 ±1.4 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, aplite, breccia, granosyenite, monzodiorite porphyry, monzonite porphyry, quartz monzonite porphyry, latite, monzodiorite, siltstone, syenite, andesite flow, andesite pyroclastics, basaltic andesite, conglomerate, diorite porphyry, limestone, shale
Tectonic setting island arc
Stratigraphic age Late Ordovician–Early Silurian

Commodity and development information

Development status Producer
Major commodities Cu, Au
Tonnage (Mt) 300Mt
Cu grade (%) 0.37%
Au grade (g/t) 0.46g/t
Contained copper 1,100,000t
Gold-Moly ratio -9999

Reference information

Comments Location, tonnage and grade of indicated + inferred resources from Geoscience Australia (2010) and Wilson, Cooke, Harper and Deyell (2007). Quartz-Cu-Fe-S stockworks, sheeted quartz veins.
Study area name Australia
References Wilson and others (2003); Collett (2007); Cooke and others (2007); Wilson, Cooke, Stein, and others (2007); Geoscience Australia (2010); Wilson, Cooke, Harper and Deyell (2007)
Site reference Bookstrom and others (2014)
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.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.)Geoscience Australia, 2010, Australian mines atlas: Geoscience Australia Web page accessed October 20–December 27, 2010, at http://www.australianminesatlas.gov.au/.Wilson, A.J., Cooke, D.R., and Harper, B.L., 2003, The Ridgeway gold-copper deposit—A high-grade alkalic porphyry deposit in the Lachlan fold belt, New South Wales, Australia: Economic Geology, v. 98, p. 1637–1666. (Also available at http://dx.doi.org/10.2113/gsecongeo.98.8.1637.)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.)