The Union Jack occurrence consists of a "ledge" (vein or fracture filling), 1 metre in width, that is reported to have a high copper content. It is also reported that this occurrence is located on the east side of Alberni Inlet across from Hayes Landing (probably across from Hayes Mine, 092F 140 on Hayes Creek).

The area is mapped as Karmutsen Formation volcanics and Quatsino Formation limestone, both of the Upper Triassic Vancouver Group. The deposit is in the same area as the Kitchener deposit (092F 138), and it may be assumed that the Union Jack occurrence is also a skarn deposit, either related to Quatsino limestone or to limestone beds in the upper part of the Karmutsen.

In 1983, on the Dusty Copper property located in the same general area as the Union Jack, several showings and some old trenches were located. The showings were not described. A grab sample of material containing chalcopyrite assayed 3.23 per cent copper (Assessment Report 11368).