The Rose Marie occurrence is located on the west side of Clair Creek, 600 metres from its confluence with Carpenter Creek. New Denver is located 3 kilometres to the west.
The Rose Marie occurrence was found on the former Rose Marie claim, and Crown-granted to Moran and Greenlea in 1900. In 1904, it was combined with the Mowitch claim group consisting of the Mowitch (Lot 4558), St. Clair (Lot 4559), Rose Marie (Lot 4003), Home Run, Grand Stand and Ronald Fraction claims. The Rosemarie claim apparently reverted to the Crown for it was Crown-granted to J. Cecheleco and associates in 1919. A small amount of work was done on the claim in 1920 and then it lay idle until 1949 when the upper tunnel was reopened and a small shipment of ore made. Workings consisted of four adits and explore two vein-lodes crosscutting Slocan Group metasediments, the lower referred to as the Mowitch lode (082FNW002) and the upper as the Rosemarie lode. The Rose Marie lode was explored by two adits, 69 metres vertically above the upper adit of the Mowitch lode.
The Rose Marie occurrence is underlain by quartzite, limestone and interbedded argillite, predominantly massive. These strata strike northwest, dip steeply to the northeast and are intruded by feldspar porphyry dikes.
The Rose Marie lode is less well defined than the Mowitch lode but is 90 to 180 centimetres wide, crosscutting slate of the Slocan Group. It strikes about 020 degrees and dips 60 degrees southeast on average. The lode consists of bands and stringers of quartz, siderite and brecciated wallrock hosting tetrahedrite and more galena and sphalerite than the Mowitch lode. Some pyrite is also present.
Ore was intersected near the face of the 12-metre long upper adit. Production records are incomplete for the Rose Marie occurrence. Records show 10 tonnes of ore mined in 1949 with 8709 grams silver, 1144 kilograms lead and 818 kilograms zinc recovered. It is also reported that several tonnes of ore were mined from the upper adit in 1920. The ore was found to yield trace gold, 1508 grams silver, 37 per cent lead and 16 per cent zinc. Several tonnes of shipping-grade ore were also mined from the lower adit in this same year (Minister of Mines Annual Report 1920, page 125).
