The Crown occurrence is located about 25 kilometres south of the community of Dease Lake.

The area is mainly underlain by Middle Triassic rocks of the Stuhini Group. Rocks on the property are described as andesite, basalt, tuff, breccia, volcanic sandstones and conglomerate. The country rocks are intruded by small granodiorite and quartz monzonite bodies related to the Middle Jurassic Three Sisters Plutonic Suite.

Disseminated and vein chalcopyrite with orthoclase and skarn alteration occur in volcanic rocks adjacent to a monzonite intrusion. A pyritic gossan is reported.

In 1971-72, several geophysical surveys (induced polarization, resistivity and magnetics) and two diamond-drill holes were completed by Union Miniere Explorations and Mining Corp. Ltd.

During 2011, 21.85 kilometres of induced polarization/resistivity survey were conducted on the Tanzilla-Pliny property on behalf of West Cirque Resources Ltd. In addition, 5.85 kilometres of ground magnetic survey were completed on the Pliny claims which covers the Crown showing.