The Sheelagh Creek showing area is underlain by rocks of the Upper Triassic Stuhini Group.

The showing is located on the east wall of a small intermittent stream draining from the north into Sheelagh Creek. The showing consists of a 2.5 to 3.5-metre wide quartz vein striking approximately 045 degrees and dipping about 75 degrees to the northwest. It is traceable over 8 metres before it disappears under the surrounding overburden/greywacke/sandstone. Mineralization consists of disseminated to semi-massive pods of pyrite. Three one-metre chip samples were taken across the face of vein and produced assay results of 15.77 grams per tonne gold and 41.83 grams per tonne silver over 3.0 meters (Assessment Report 24965). A selected grab sample yielded values of 61.37 grams per tonne gold and 109.4 grams per tonne silver (Assessment Report 24965).

In 1996, the first comprehensive regional mapping, prospecting and geochemical survey was completed by Kenrich Mining Corp over most of the Corey property. Along with the surface work, 1200 kilometres of airborne magnetic and radiometric surveys were completed over the western half of the properly. During the regional surveys, four geologists took a total of 387 rock samples, 234 moss mat samples and 75 stream sediment samples. Four major targets were located: HSOV (104B 387), CB (104B 388), Sheelagh Creek and TM (104B 354). Four diamond drill holes, to test the Sheelagh Creek showing were attempted, however did not reach the vein.

In 2006 and 2007, Hathor Exploration Ltd. completed a 7228.7 line-kilometre airborne geophysical survey on the area as the Gracey claims of the Iskut project. In 2008, Max Minerals Ltd. examined the property.

In 2016, Tudor Gold Corp conducted a small program on the Sheelagh Creek occurrence. The results of sampling in August 2016 were reported to have yielded a much more modest weighted average result for the vein than in previous years: 4.33 grams per tonne gold and 15.23 grams per tonne silver over 1.85 metres with a selected grab containing 36.7 grams per tonne gold and 101.0 grams per tonne silver. No enrichment was found in any other elements often found associated with gold and very low calcium values confirm the absence of calcite. Gold to Silver ratio were consistently around 1:4. Despite hours of searching, no indications of any potential strike length past the original outcrop could be located.

See Cumberland (104B 011) for details of the Corey property work history.