The JOLLY JACK (Topper) occurrence is located on a south-facing slope, southwest of Eureka Peak and approximately 1.5 kilometres north-northeast of the northwestern end of Crooked Lake, 47.5 kilometres east of the community of Horsefly.

Regionally, the area is underlain by mudstone, siltstone, shale and fine clastic sedimentary rocks of the Middle to Upper Triassic Nicola Group and Triassic Slocan Group. To the east, serpentinite ultramafic rocks of the Upper Paleozoic Crooked amphibolite and metasedimentary rocks of the Neoproterozoic to Paleozoic Snowshoe Group are exposed.

Locally, a ‘knotted’ (hematite-limonite–altered) black graphitic phyllite, interbedded with minor calcareous arenites and quartzites hosts quartz veins or ‘sweats’ with sulphide (pyrite-galena?) mineralization. For more detailed regional and local geology descriptions see the Frasergold (MINFILE 093A 150) occurrence.

In 1984, a sample (TP-42) quartz vein material assayed 0.124 per cent lead and 31.0 grams per tonne silver (Assessment Report 12517).

During 1984 through 1993, Grand National Resources Inc. completed programs of rock, silt and soil sampling, geological mapping and ground electromagnetic surveys on the area as the Jolly Jack and Topper claims. Anomalous gold values, up to 4350 parts per billion, and visible gold have been identified in heavy mineral stream sediment samples (Assessment Report 17989).

During 2006 through 2011, Dajin Resources Corp. completed programs of rock, soil and silt sampling, geological mapping and a 684.1 line-kilometre airborne geophysical survey on the area as the Addie 2 claim.

From 2021 to 2023, Karus Gold Corp. ran regional programs of geological mapping, prospecting, silt, soil and rock sampling over their large tenure holdings, extending from McNeil Lake in the southeast to the community of Likely in the northwest. Most of their work in 2023 focused on the Thunder Ridge area in the southeast, including north of the Jolly Jack area, north of Crooked Lake (Assessment Report 41906).