Mandamah

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

Names and other identifiers

GMRAP ID 650
Tract name Macquarie (009pCu8002)
Group name Temora Central Group
Included sites Group includes Cullingarai, Estoril, and Mandamah deposits and Chicane, Homer, and Monza prospects.
Site status deposit

Geographic location

Country Australia
State or province New South Wales
Geographic location 147.33, -34.166
Geologic map unit 147.33, -34.166
Nearby data

Geologic information

Deposit type Porphyry copper
Deposit subtype Cu-Au
Age (Ma) 436.4Ma
Age determination method Inferred from U-Pb zircon age of intrusion at Gidginbung
Age range 436.4 ±3.1 Ma
Age reference Lawrie and others (2007)
Minerals albite, actinolite, biotite, carbonate, chalcopyrite, chlorite, epidote, hematite, K-feldspar, magnetite, pyrite, sericite
Associated rocks mafic to intermediate volcanic and volcaniclastic rocks of the Ordovician Narragudgil, Gidginbung, and Temora Volcanics, diorite to monzodiorite stocks, plugs, and dikes
Tectonic setting island arc
Stratigraphic age Early Silurian

Commodity and development information

Development status Prospect
Major commodities Cu, Au
Trace commodities Mo
Tonnage (Mt) 28Mt
Cu grade (%) 0.35%
Mo grade (%) 0.0028%
Au grade (g/t) 0.4g/t
Contained copper 99,000t
Gold-Moly ratio 100

Reference information

Comments Location, tonnage and grade of inferred resource from Geoscience Australia (2010). Porphyry Cu-Au mineralization related to porphyritic monzodioritic stocks, plugs and dikes. Deposit is covered by 50 m of alluvium; drill intercepts: 206 m at 0.37% Cu and 0.51 g/t Au; 50 m at 0.5% Cu and 0.8 g/t Au. Locally overprinted by albite-sericite-pyrite assemblage associated with Devonian orogenic gold veins.
Study area name Australia
References MacCorquodale (1997); Lawrie and others (2007); Mowat (2007); Geoscience Australia (2010); Perkins and others (1995); Goldminco Corp. (2008); Singer and others (2008)
Site reference Bookstrom and others (2014)
Geoscience Australia, 2010, Australian mines atlas: Geoscience Australia Web page accessed October 20–December 27, 2010, at http://www.australianminesatlas.gov.au/.Goldminco Corp., 2008, Goldminco acquires ground along strike from the Dam porphyry copper-gold deposit, at its 100% owned Temora project: Goldminco Corp. press release, 2008, 1 p., accessed October 2010, at http://www.goldminco.com/images/stories/newsrelease/2008/Goldminco_acquires_ground_along_strike_from_the%20_DAM_Porphyry_Coopper-Gold_Deposit,_at_its_100_owned_Temora_Project_%2120080229.pdf. (Accessed September 3, 2013, at http://www.stockhouse.com/companies/bullboard/delisted/delisted-companies?postid=14585106.)Lawrie, K.C., Mernagh, T.P., Ryan, C.G., van Achterbergh, E., and Black, L.P., 2007, Chemical fingerprinting of hydrothermal zircons—An example from the Gidginbung high sulphidation Au-Ag-(Cu) deposit, New South Wales, Australia: Proceedings of the Geologists’ Association, v. 118, p. 37–46. (Also available at http://dx.doi.org/10.1016/S0016-7878(07)80045-9.)
MacCorquodale, F., 1997, The Mandamah porphyry Cu-Au prospect [abs.]: Geological Society of Australia Abstracts, v. 51, p. 51.
Mowat, Bruce, 2007, Characteristics of porphyry copper-gold mineralization in the Gidginbung Volcanics, in Mines and Wines Symposium—Mineral Exploration in the Tasmanides, Orange, New South Wales, September 20–21, 2007, Proceedings: Sydney Mineral Exploration Discussion Group presentation, 24 p., and AIG Bulletin 46, p. 107–112, accessed September 3, 2013, at http://smedg.org.au/M&W07/Bruce%20Mowat%20-%20Gidginbung%20Volcanics%20porphyry%20Cu-Au.pdf.Perkins, Caroline, Walshe, J.L., and Morrison, Gregg, 1995, Metallogenic episodes of the Tasman fold belt system, eastern Australia: Economic Geology, v. 90, p. 1443–1466. (Also available at http://dx.doi.org/10.2113/gsecongeo.90.6.1443.)Singer, D.A., Berger, V.I., and Moring, B.C., 2008, Porphyry copper deposits of the world—Database and grade and tonnage models, 2008: U.S. Geological Survey Open-File Report 2008-1155, [45] p. and digital data, accessed December 31, 2013, at http://pubs.usgs.gov/of/2008/1155/.