The O occurrence is located in the vicinity of an unnamed tributary north of Fulton Lake, approximately 7 kilometres southwest of the community of Granisle and about 56 kilometres east of the community of Smithers.

The area is underlain by Triassic Takla Group volcanics comprised mainly of augite porphyry flows, breccia and tuff with occurrences of dark grey shale and minor conglomerate. The porphyry flows and tuff host minor occurrences of bornite, chalcocite and malachite. Chalcopyrite occurs in fine epidote-filled fractures in the volcanic flows.

In 1970, El Paso Mining and Milling completed a geochemical soil survey on the O claims. In 1972, Amoco Canada acquired the M, R and O claims and completed programs of various geophysical and geochemical surveys. The property was allowed to lapse in 1974 before being restaked by Cities Services.

In 2012, an aeromagnetic program was conducted over the Flute and Lennac (093L 190, 191, 243, 338) properties having a total area coverage of 813 square kilometres. The O occurrence was covered by this survey. Total survey line coverage is 4444 line kilometres. A report on the survey by Riverside Resources (BC) Inc. is found in Appendix D of Assessment Report 33032. However, maps showing the Total Magnetic Intensity and First Vertical Derivative of TMI are found in Assessment Report 33707F. These maps indicate that the following MINFILE occurrences have been covered by the survey: Tachi (093L 144), Guess Creek Coal (093L 151), O (093L 163), Mine (093L 164), Alp (093L 167), Thezar 75 (West) (093L 190), Thezar 81 (East) (093L 191), Cortina (093L 192), Cougar (093L 193), Totem (093L 199), Red (093L 210), Donna (093L 212), FG (093L 213), Badge (093L 215), Sat (093L 224), Pro (093L 225), Jill (093L 242), Jacob (093L 243), Cart (093L 306), Chris (093L 307), Calcite (093L 308), Gold Dust (093L 315), and Suratt (093L 338).

In 2012 and 2013, Riverside Resources (BC) Inc. conducted a percussion drill program in a significant area north of Fulton Lake (Assessment Reports 33707 and 34591). The purpose of the drill program was to penetrate glacial cover and test the bedrock in target areas to determine if further work including diamond drilling was worthwhile. Drilling was located on pre-existing access roads and trails. In 2012, a total of 96 vertical drillholes for 1997 metres at 93 sites were completed, and in 2013 a further 77 vertical percussion-drill holes totalling 1655 metres were drilled. Three new intrusive centres with anomalous copper and gold with porphyry-style alteration were discovered on the Flute property as result of the reverse circulation drilling and sampling. A total of 720 broadly-spaced Ah horizon samples were collected on the Flute and Lennac properties. Sampling grids were expanded with 250-metre spacing at Red Top and 500-metre spacing on the newly acquired O target.

Refer also to Lennac property occurrences Thezar 81 (East) (093L 191), Thezar 75 (West) (093L 190), Suratt (Southeast) (093L 338), and Jacob (093L 243).