The City of Paris mine is 10 kilometres southeast of Greenwood and 1.1 kilometres north of the International Boundary, at the elevation of 1370 metres, east of Goosmus Creek. Access to the mine is from the Boundary road 1 kilometre west of the Phoenix (082ESE020) - Lone Star (in Washington State) haulage road. The Lexington (082ESE041) lies 500 metres to the northwest.

Production from the City of Paris mine for the period 1900 to 1940 was 1926 tonnes of ore containing 26.6 kilograms of gold, 139 kilograms of silver, 60.4 tonnes of copper and a small amount of lead and zinc. About 85 per cent of this production was in 1900. An additional 8 tonnes of ore was produced from the Lincoln claim in 1962 and 1963, yielding about 11.5 kilograms of silver, 373 kilograms of lead and a minor amount of gold and zinc.

The City of Paris (Lot 622) and Lincoln (Lot 621) claims were Crown granted in 1895 to J. Stevens. Development of the City of Paris mine began in 1898. A crosscut adit was driven 250 metres northeast to intersect the main southeasterly trending vein system at about 90 metres below the hill side. From this intersection drifting was extended 180 metres northwest on the vein, connecting with the City of Paris shaft, and further drifting of 90 metres to the southeast towards the Lincoln shaft. At the end of the main period of production in 1900 the total mine development consisted of 1580 metres of drifts and crosscut tunnels, 213 metres of raises and 113 metres of shafts.

In 1962, King Midas Mines Ltd. drove a short adit near the base of the Lincoln shaft, immediately southeast of the City of Paris workings. This operation produced a small amount of high grade silver ore in 1962 and 1963. In the period 1968 to 1981, additional exploration, including trenching and diamond drilling, was completed. In 1980 a new adit was driven midway between the City of Paris and Lexington adits. This work included 210 metres of drifting and crosscut tunnelling and 34 metres of raise development.

The City of Paris mine is on a vein system near the south contact of a major ultramafic lens. The vein system consists of two locally discontinuous, subparallel veins developed along the margin of a narrow serpentinite appendage flanking the main ultramafic body. The veins trend northwest at about 160 degrees and vary in width from 5 metres to mere stringers of ore. The vein system dips 55 degrees northeast and has an exposed strike length of 460 metres. The City of Paris vein, which follows the northeast side of the serpentinite appendage, is the source of much of the mined ore.

The Lincoln vein occurs on the south side of the serpentinite appendage. This is the vein followed by the main northwest trending drift on the bottom level of the mine. The lithologies in this area are impregnated with and traversed by stringers of quartz and calcite carrying sulphides, which diminish in amount with distance from the main lead. The ore on northwest occurs in chutes and consists of argentiferous galena, sphalerite, tetrahedrite, chalcopyrite and pyrite, while in the southeast drift the ore is almost massive pyrite and chalcopyrite. Some of the best assay results were obtained from the Lincoln shaft and portal area. The metal values are unevenly distributed, running in pay streaks. A grab sample from the vein near the Lincoln shaft assayed 2.1 grams per tonne gold, 182 grams per tonne silver, 1.84 per cent copper, 3.98 per cent lead, 0.12 per cent zinc, 0.073 per cent arsenic, and 0.93 per cent antimony (Geology, Exploration and Mining 1970, page 421).

The origin of the vein system is related to reactivation of thrusting at the contact between the Lexington quartz porphyry and hangingwall serpentinite during the development of the Republic graben. The veins clearly existed prior to emplacement of the Tertiary dikes, as evidenced by the damming of these dikes adjacent to the veins. However, the veins are also younger than the penetrative deformation that is commonly seen in the surrounding country rocks. An analysis of fuchsite obtained from quartz stringers in listwanite, immediately north of the Lincoln workings, yielded a K/Ar age of 56.7 +/- 1.0 Ma.

Much of the recent exploration has focused on the widespread, low grade copper mineralization associated with the quartz porphyry intrusion on the City of Paris, Lincoln, Lexington and adjacent claims. This 'porphyry' mineralization is mostly contained within a 900-metre long, 300-metre wide segment of the quartz porphyry exposed between the main ultrabasic intrusion and a smaller subparallel serpentinite splay near Goosmus Creek. The principal mode of occurrence of the main ore minerals, pyrite and chalcopyrite, is in fractures and disseminations and, to some extent, in quartz stockworks. Anomalous copper values have also been obtained in the serpentinite splay adjacent to the quartz porphyry intrusion near Goosmus Creek, just below the Lexington portal. This sheared serpentinite contains interfoliated impregnations and massive lenses of pyrite, chalcopyrite and magnetite.