The Jackpot East prospect is located on the ridge between Hidden and Porcupine creeks, 10 kilometres northeast of Salmo. See also Jackpot Main (082FSW012), Jackpot West (082FSW255) and Jackpot Lerwick (082FSW256).

The Jackpot orebodies are currently thought to be Kootenay Arc-type carbonate hosted sedimentary exhalative (sedex) deposits. The orebodies are located within dolomitized limestone of the Lower Cambrian Laib Formation, Reeves Member (correlative with limestone of the Badshot Formation). In the occurrence area, the host Reeves Member is complexly folded and faulted and is in close proximity to the north margin of the Hidden Creek stock of the Middle to Late Jurassic Nelson Intrusions.

The carbonates form the core of the Jackpot syncline which trends slightly northeast and dips about 60 degrees east above 1370 metres elevation. Below this elevation the dip changes through vertical to west dipping. The core carbonates are underlain by brown biotite hornfels and white to brown, micaceous limestone of the Truman Member of the Laib Formation and by fine grey micaceous quartzites of the Lower Cambrian Reno Formation. The hornfels is locally altered to a banded diopside rock and the limestones are locally altered to skarn and reportedly carry scheelite. The east limb of the syncline is in fault contact with the Ordovician Active Formation argillites.

The Jackpot East mineralization consisting of pyrite, pyrrhotite, sphalerite, and minor galena is confined to bands of dolomite up to about 3 metres thick which alternate with barren dolomites. Sulphides are disseminated and grade ranges from 3 to 15 per cent zinc and minor lead (Bulletin 41). The mineralized zone including barren horizons is in the order of 30 metres thick although individual mineralized horizons have not proven to be laterally extensive. The occurrence has had extensive exploration work but no significant production has been documented. For reserves and work history refer to Jackpot Main (082FSW012).

Tombstone Explorations Co. Ltd. acquired the Jackpot property from New Jersey Zinc Explorations Company (Canada) Ltd. in 1997.