The mineralization of Gold Quarry is generally bounded on the northwest by the northeast-striking Chukar-Alunite Fault zone, and on the southeast by the north–northeast-striking Deep Sulfide Feeder Fault zone. Mineralization is preferentially located in the hanging wall of the Chukar-Alunite Fault Zone and in the footwall of the Good Hope Fault. Gold mineralization is disseminated, with higher gold grades concentrated adjacent to structures.
Ten geologically distinctive mineral zones have been defined, referred to as Quarry Main, Deep West, Deep Sulfide Feeder, Chukar North, Chukar South, Good Hope, Mac, Magpie, Southwest, and Wedge.
Six major lithologic units are recognized in the Gold Quarry deposit from surface mapping and drill hole logging: Tertiary Carlin, Devonian Slaven, Devonian Rodeo Creek, Devonian Popovich, Silurian Roberts Mountains, and Ordovician Hanson Creek Formations.
The four main gold-hosting lithologies are:
• Silty limestone sections of the Roberts Mountains Formation;
• The upper 90 metres of the Popovich Formation consisting of silty limestone and calcarenite;
• Siltstone, siliceous mudstone, and cherty siltstone of the Rodeo Creek Formation; and
• About 60 metres of upper-plate sedimentary rocks of the Marys Mountain sequence that consists of limy mudstone and siltstone.
Detailed surface mapping and drill hole interpretation indicates that there are four dominant fault sets at Gold Quar ........
