Keno Hill-type silver deposits consist of high-grade silver veins, typically 1-5 metres in width, grading from 200 g/t to >5,000 g/t silver, with associated lead and zinc sulphides. The largest individual deposits in the district, which range from 10 million to 100 million ounces of contained silver2, are associated with northeast trending, southeast dipping fault/vein structures that form major ore shoots in the preferred host rocks: quartzite and greenstone. To date, there are twelve known mineralized trends in the Keno Hill Silver District, eight of which continue through the eastern portion of the district, which hosts Metallic Minerals’ Keno Silver Project (see Figure 1 below).
Figure 1 – Keno Hill Silver District Geological Trends and Deposits
The schematic cross sections shown below (Figure 2 and 3) show the geology and deposits from three of the twelve known mineralized trends in the Keno Hill Silver District, ten of which transverse across Metallic Minerals’ Keno Silver Project. Figure 2 highlights the major historic producers as well as recent discoveries along the Bermingham–Calumet Trend and provides evidence of Keno-type mineralization occurring where the above-noted geological conditions are present. The major, new high-grade Bermingham discovery demonstrates the potential for significant new finds along trend and down dip from past producing mines in this prolific, historic district. More information on these areas is available by clicking here .
Lesser explored parts of the district, particularly the eastern portion of the Metallic Minerals ground, have similar geologic settings and also host historic producing mines and mineralized prospects with the potential to host significant new mineral resources.. Figures 3 and 4 depict the continuity of these key structural trends across the eastern portion of the Keno Hill Silver District and identify former operations which represent priority exploration targets. Each of these sections includes a detailed description of the associated target areas.