The Lower Jack zone was discovered in 1999 during prospecting along a newly constructed logging road in a steep, overburden-covered area. A number of large, lead-zinc bearing, hydrothermally altered, angular tourmalinite and Aldridge Formation fragmental float boulders occur in a 300 by 300 metre area. The float boulders are well mineralized with galena, sphalerite, arsenopyrite and pyrrhotite. This discovery was staked in the summer of 1999 and is now part of what is called the Pakk property. The Upper Jack zone was also discovered by prospecting in the area and is located 2500 metres northwest of the Lower Jack zone. A third discovery, the Sinclair zone (082FNE117), is 2000 metres north-northeast of the Upper Jack zone. The Pakk property includes the Horn, Burn, Pit and Pakk claim groups.
At surface, the Upper Jack vent zone consists of a fragmental structure with aboundant galena, sphalerite, pyrrhotite and arsenopyrite in massive lenses, veins and disseminations. The structure is 30 metres wide and is traced in outcrop for 800 metres. Helikian Aldridge Formation (Purcell Supergroup) marker beds outcrop nearby.
In 1999, Chapleau Resources Ltd. conducted a diamond drilling program on the Upper Jack Vent zone where three short holes were completed to acquire preliminary geologic data. The holes outlined a near-vertical dipping structure consisting of discordant fragmental rocks about 10 metres thick. The crosscutting fragmental rock is bracketed by a 20-metre thick zone of intensely altered sediments. Sulphides form all or part of the fragmental matrix. Sphalerite and galena are dominant, with lesser pyrrhotite, arsenopyrite and chalcopyrite. The fragmental hostrock is intensely tourmalinized along with garnet, albite and actinolite with abundant muscovite and biotite. Scheelite is widely scattered throughout the fragmental rocks and in the adjacent sediments. The scheelite occurs as large disseminated crystals and as thin veinlets.
Super Group Holdings Ltd. is directing the exploration and Chapleau Resources Ltd. is performing the work on the property.