GMRAP ID | 572 |
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Tract name | Macquarie (009pCu8002) |
Site status | deposit |
Country | Australia |
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State or province | New South Wales |
Geographic location | 148.8012, -33.4287 |
Geologic map unit | 148.8012, -33.4287 |
Nearby data |
Deposit type | Porphyry copper |
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Age determination method | Geologic inference |
Age range | ~450–445 Ma |
Age reference | Cooke and others (2007) |
Minerals | azurite/malachite, bornite, carbonate, chalcocite/digenite, chalcopyrite, chlorite, chrysocolla, copper, covellite, cuprite, epidote, goethite/limonite, gold, hematite, magnetite, molybdenite, neotocite, pyrite, sericite |
Associated rocks | calc-alkaline volcanics and sedimentary rocks, andesite porphyry, basalt, trachyandesite, tuff, shale, siltstone, limestone, dacite to rhyodacite porphyry, quartz diorite, intrusion breccia with quartz-monzonite (monzodiorite to syenite) matrix |
Tectonic setting | island arc |
Stratigraphic age | Late Ordovician |
Development status | Prospect |
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Major commodities | Cu, Au |
Minor commodities | Mo |
Tonnage (Mt) | 27Mt |
Cu grade (%) | 0.2% |
Contained copper | 54,000t |
Gold-Moly ratio | -9999 |
Comments | Intercept at 28 m at 1.0 g/t Au. Cu tonnage and grade (Singer and others (2008); location, Au resource (3.7 Mt at 1.24 g/t Au) from Geoscience Australia, 2010). Exposed; production 1870 to1904 of 318 kg Au and 10 t Cu. Radial veins with 30 to 102 g/t Au; alluvial placers at 6 to 40 g/t Au. Classified as porphyry copper with gold mineralization described by Torrey and White (1998). Central zone of elevated Cu, Mo, peripheral gold halo, and outer zinc-rich zone. Concentric, porph-style potassic, phyllic, propylitic alteration; NW-zone of sheeted quartz veins stockwork of barren qtz veinlets. Late radial qtz-carbonate-Au veins. Calc-alkaline porph Cu-Mo system w/ late, peripheral epithermal Au veins. Au placers. |
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Study area name | Australia |
References | Carr and others (1995); Torrey and White (1998); Richardson and others (1983); Golden Cross Resources (2009); Cooke and others (2007); Singer and others (2008); Geoscience Australia (2010); Perkins and others (1995) |
Site reference | Bookstrom and others (2014) |