The PR7 occurrence is located near the headwaters of Alice Shea Creek about 66 kilometres east-southeast of the community of Dease Lake.

The area is underlain by a five-kilometre-wide belt of upper Mississippian to Permian ultramafic rocks of the Cache Creek Complex consisting of serpentinized peridotite, dunite and pyroxenite. Areas of mafic volcanic rocks and sediments (chert, slate, argillite, graphitic schist, and limestone) occur and are, except for the limestone, probably part of the Mississippian to Triassic Kedahda Formation (Cache Creek Complex). These are believed to be in fault contact with the ultramafic rocks.

In 1985, massive sulphides consisting of pyrite and chalcopyrite were found in outcrop on the PR7 claim. In 1986, at the western edge of the PR7 claim, massive quartz boulders were discovered among the coarse rubble from the outcrops and are reported to contain inclusions of bornite and malachite. In 1986, a sample assayed 0.81 per cent copper, 16.46 grams per tonne silver and 0.41 gram per tonne gold (Assessment Report 16418).

In 1985, Powder Ridge Resources Inc. performed airborne magnetic and VLF-EM surveys on their PR 1-7 claims. The survey results revealed magnetic highs and lows, VLF-EM anomalies, and lineations with predominant northwest trends and strike lengths of 400 to 2000 metres. In 1987, additional exploration was completed by D.O. Friedlund on the PR 8-9 claims with geological mapping, soil, silt, and rock sampling. Also in 1987, Powder Ridge Resources Inc. performed trenching and soil sampling on their PR 4-7 claims. A total of 12 rock grab samples and 11 soil samples were collected and assayed.

During 1996, Loumic Resources Ltd. performed trenching, geological mapping, and soil sampling northwest of PR 7 and along the Ferry Creek drainage of King Mountain. The 1996 exploration resulted in the collection of 196 soil and 33 trench samples. Trenching identified faults, shearing, listwanite alteration, copper staining, oxidized pyrite, and anomalous values in copper and arsenic. The soil surveying indicated four or five areas anomalous in copper-arsenic possibly associated with gold.

During July and August of 2007, Turnagain River Exploration Ltd. conducted a reconnaissance exploration program over the Turnagain property, consisting of prospecting and heavy mineral concentrate stream sediment sampling over at least seven showings (King Kong, 104I 067; Spring, 104I 110; King Mountain, 104I 108; PR8, 104I 109; PR7, 104I 107; Alice Shea Jade, 104I 104; and Alice Shea Creek, 104I 005).