At the Deer Park showing syenite, monzonite and aphanitic feldspar porphyry of the Eocene Coryell Plutonic Suite are intruded by a swarm of northwest striking dikes of feldspar biotite porphyry, syenite porphyry, and andesite. East trending breccia zones disrupting the dikes are surrounded by a variable, locally intense stockwork of quartz and magnetite veins, which diminishes away from the breccia. A weak clay-pyrite alteration halo is coincident with the west breccia and is centred around a small, but strong, quartz-sericite-pyrite zone around an old shaft. The quartz-sericite-pyrite forms the matrix to the breccia at this locality and some disseminated molybdenite is also conspicuous with the alteration. A small clay-pyrite zone is present in the east breccia.
Chalcopyrite and rare sphalerite and scheelite occur in breccia. Disseminated molybdenite occurs in the quartz monzonite phase of the syenite and in the syenite.
Little molybdenum mineralization has been found on surface and only short, sporadically mineralized sections have been intersected in diamond drilling. The best intersections are 15.2 metres in drillhole DP71-7 containing 0.22 per cent molybdenum and 18.3 metres in drillhole DP 74-4 containing 0.10 per cent molybdenum. Minor amounts of copper and zinc were also encountered (Assessment Report 10301).
Previous exploration work on the Deer Park property dates back to the early 1900s when the property was known as the Midas Group. Most of the work at that time consisted of driving short adits and shafts on mineralized quartz veins. More recent work by West Coast Mining and Exploration, and Amax Ltd. included geological mapping, soil sampling, geophysical surveys and diamond drilling. In 1971, West Coast Mining and Exploration drilled seven holes totalling 549 metres. During 1974, Amax Ltd. drilled six holes totalling 1582 metres. Utah Mines Ltd. optioned the property in 1979 and conducted geological remapping, diamond drill core relogging and sampling, rock sampling and an altimeter survey. Utah drilled one hole, DP-14, to a depth of 762 metres in 1980. In 1981, Utah Mines Ltd. deepened drillhole DP-14 and then drilled a new hole for a total meterage of 1121 metres. In 2004, the CP claims covered the showing and prospecting was conducted on behalf of the owner, T. Kennedy.
