Crown Grant (Lot 3098S) is located on the west side of Highway 97 on the northern outskirts of the town of Oliver and was originally staked in 1927 to explore the small amounts of metallic mineralization associated with the quartz veining.

The pegmatite quartz body occurs within the Jurassic Oliver Plutonic Complex or Oliver granite. This pluton is composed mainly of medium-grained quartz monzonite occurring in three distinct phases; biotite-hornblende quartz monzonite, garnet-muscovite quartz monzonite and porphyritic quartz monzonite. Large quartz veins and plugs are restricted to a porphyritic quartz monzonite phase. The veins formed mainly by open-space filling although there is some evidence of wallrock replacement.

The area is underlain principally by three distinct phases of medium-grained intrusive rocks of the Oliver Plutonic Complex. These are, from youngest to oldest, muscovite-garnet quartz monzonite, porphyritic biotite quartz monzonite, and biotite- hornblende quartz monzonite. Additional phases include diorite rocks and fine-grained dikes and pods of quartz monzonite. To the south the pluton cuts Kobau metasedimentary rocks of Carboniferous to Permian age.

The quartz body strikes east and dips south at 55 to 60 degrees. At the quarry it has a known strike length of 152 metres, width of 61 metres and approximate true thickness of 85 metres. To the west, a thinner extension of the main body continues for another 90 metres. The hangingwall is a narrow shear zone while the footwall exhibits greisen alteration, consisting of muscovite and lesser quartz, up to 30 metres from the quartz. For further information about the vein, refer to the Ballaret occurrence (082ESW084).

The greisen of the deposit is reported to contain considerable thorium and near-equilibrium uranium suggesting it was dominantly a hydrothermal deposit of at least moderate temperature (Assessment Report 6949). Loosely defined patches of anomalous uranium (160 to 600 counts per second) have also been found in fine-grained quartz monzonite hosted within porphyritic biotite quartz monzonite, near the margin of the Oliver intrusion. These anomalies contain no thorium.