Above: Left, core from Keats zone, Queensway gold project; right, core from the Eagle zone, Fosterville mine. Comparison of gray and white quartz vein material with numerous small specks of native gold from each deposit. Grey specks are mostly antimony minerals, boulangerite on the left and stibnite on the right. Some gray flecks are particles of black shale caught up in quartz. Such fine gold particles likely formed through rapid precipitation of gold in a shallow epizonal regime within an orogenic system, an indication of a shallow level of deposition for both deposits.
Above: Left, core from Keats zone, Queensway gold project; right, core from the Eagle zone, Fosterville mine. Comparison of gray and white quartz vein material with numerous small specks of native gold from each deposit. Grey specks are mostly antimony minerals, boulangerite on the left and stibnite on the right. Some gray flecks are particles of black shale caught up in quartz. Such fine gold particles likely formed through rapid precipitation of gold in a shallow epizonal regime within an orogenic system, an indication of a shallow level of deposition for both deposits.