The Jamtart showing consists of mineralized rocks found in a talus apron below a steep and unstable cliff, about 2.4 kilometres southwest of the Nifty (093D 006) volcanogenic massive sulphide prospect, north-northeast of Hagensborg and west of Noosegulch Creek. The showing was discovered sometime during the late 1970's or early 1980's during a flurry of exploration of the area surrounding the Nifty. Neither descriptions of the showing nor its location appear in the assessment reports over that period, however, it is referred to in passing in later reports as being a lead-zinc showing. Presumably the minerals are sphalerite and galena.

Gerry Ray of the Geological Survey Branch visited the Jamtart occurrence in 1997 during a study of the Nifty occurrence. Chemical plots of samples taken during that visit indicate that the volcanic rocks hosting the Jamtart occurrence are largely subalkaline, calcalkaline basalts and andesite that have medium to high K2O content.

In 1997, Wildrose Resources of the Eastfield Group, acquired the Thunderbird property, which includes the Nifty, Keen (093D 007), Cutfinger, and Jamtart occurrences. The T-Bird 1-4, Thunder, and Bird claims are held in good standing by Wildrose Resources Ltd. of Vancouver until October 1999.