The historic Jenny Long camp is located 3.8 kilometres south east of the historic Mineral Hill camp, approximately 7.7 kilometres south of the community of Stump Lake. The Enterprise mine (MINFILE 092ISE028) is located 4 kilometres to the north west and a complete exploration history of the area can be found there.
The camp occurs within a north trending belt of Upper Triassic intermediate volcanics, volcaniclastics and sediments belonging to the Nicola Group. These greenstones consist of massive, chlorite-epidote altered andesite and basalt, augite porphyry, andesitic flow breccia and tuff, minor interbedded argillite, conglomerate and limestone. Attitudes of tuff horizons and sedimentary bedding suggest that a north plunging axis of a syncline passes through Mineral Hill. Both west and northeast of Stump Lake, the Nicola Group volcanics are intruded by Lower Jurassic granitic batholiths; scattered granodiorite outcrops have been mapped in the vicinity of the camp. Secondary to the north-northeast trending Quilchena and Stump Lake regional faults are numerous smaller faults which form a complex fracture pattern and appear to control alteration and mineralization. Andesitic rocks are bleached, pervasively silicified, pyritic and brecciated. Mineralization occurs in numerous quartz, and less commonly calcite veins which strike generally to the north and dip steeply eastward.
The Jenny Long occurrence originally consisted of an 85.4 metre deep shaft with underground workings on three levels and several surface trenches and pits. A quartz vein system within altered andesitic rocks strikes 350 degrees and dips 60 degrees east and pinches and swells up to 2 metres in width, but is generally less than 75 centimetres wide. Mineralization consists of variable amounts of galena, sphalerite, pyrite and chalcopyrite. Narrow bands of scheelite were found in quartz samples from the dump.
In 1935, Kooteny Nevada Mines Ltd. erected a 32 tonne per day mill with a recorded production of approximately 635 tonnes yielding 5813 grams of gold, 106,750 grams of silver, 8300 kilograms of lead and 2600 kilograms of zinc (EMPR PF - Cherokee Developments Ltd. (1976-12-08): Prospectus Report on the Jenny Long Group).
Grab samples of dump material have returned values up to 13.3 grams per tonne gold, 325.8 grams per tonne silver, 2.87 per cent lead, 0.65 per cent zinc and 0.89 per cent copper (EMPR Property File - Cherokee Developments Ltd. (1977-01-18): Prospectus Report on the Jenny Long Group of Claims).
In 1996, a program of prospecting, stream sediment sampling, re-sampling of known open-cuts and adits and a 6.1 line-kilometre ground magnetic and electromagnetic (VLF) survey was completed. Extensive prospecting carried on outside the grid area reportedly resulted in the discovery of numerous old workings consisting of trenches, pits, adits, and shafts. A sample of mineralized quartz vein from the Jenny Long system assayed 18.4 grams per tonne gold, 294.1 grams per tonne silver, 0.3 per cent copper, 1.0 per cent lead and 0.2 per cent antimony (Assessment Report 24923; Gourlay, A.W. (2013-09-13): Independent Geological Report on the Mineral Hill Property).
