The Sunshine property is situated near the headwaters of Howson Creek at 1875 metres elevation above sea level, in the Slocan Mining Division. The property includes underground workings on the Sunshine No. 2 and Yakima Crown grants (Lots 3096 and 3097).
This group, comprising the Sunshine, Monday Fraction, Monday, Kass Fraction, Yakima, Cuba (082FNW195) and Oregon (082FNW044) Crown-granted claims, is situated on both sides of and adjoining the Corinth group (082FNW045).
The Sunshine lode was explored by a series of adits crossing the ridge between Miller and Howson creeks, 2 of which on the west slope were still accessible in 1952. The lower adit was followed in 1946 for a length of 161.5 metres. A drift from this adit follows the lode for 94.4 metres. The upper adit is a drift on the lode 62.4 metres long, and a connection exists with the lower adit nearly 30.4 metres below. Small caved adits near the ridge crest and down the eastern slope may or may not be on the same lode.
Three adits driven on the Yakima claim at an elevation of nearly 1829 metres are all caved. Another adit completely caved, but with a large dump, is at the fork of the road on the east side of the claim.
In 1935 Silver Ridge Mining Company Limited was incorporated and acquired the property, which up to this time had been developed by the Sunshine Mining Company Limited. An adit was started in 1936, on the western side of the Miller Creek basin to intersect the lode at a lower level. This adit encountered broken ground and in 1946 was caved 45.7 metres from the portal.
In 1937 a large amount of stripping was done on the Oregon, Yakima and Cuba claims and some underground exploration carried out. Following this it was decided to drive a long cross-cut to explore old and now showings at depth. The crosscut was began near the north side of the Oregon claim at an elevation of 1592.5 metres, in 1938. Work was suspended in March 1940, but recommenced in the fall of 1945 and continued until July 1946 when the crosscut was abandoned because of unsatisfactory results and a heavy inflow of water. This adit when abandoned had a length of 655.3 metres and had reached a point directly beneath the old Yakima workings.
Regionally, the area lies on the western margin of the Kootenay Arc, in allochthonous rocks of the Quesnel Terrane. In the vicinity of the occurrence, the Quesnel Terrane is dominated by very fine grained clastic sedimentary rocks of the Upper Triassic Slocan Group that include locally weakly metamorphosed argillite, quartzite, limestone and some tuffaceous rocks. These sedimentary rocks are intruded by dikes, sills and stocks of varied composition and origin. Permian and/or Triassic Kaslo Group metamorphosed volcanic rocks occur to the north of the Slocan Group rocks. Middle Jurassic Nelson intrusions are immediately south of the Slocan Group and are inferred to be the source of granitic to pegmatitic sills and dikes found in the area. The Nelson intrusions comprise at least six texturally and compositionally distinct phases ranging from diorite to lamprophyre. The most dominant phase is a medium to coarse grained potassium feldspar porphyritic granite (Paper 1989-5).
The occurrence is hosted by predominantly interbedded black argillite, quartzite and limestone of the Slocan Group. The sedimentary rocks have been folded, fractured, faulted and regionally metamorphosed to greenschist facies. The regional northwest trending asymmetric Slocan syncline is thought to be Middle Jurassic and is the first recognizable deformation in the sequence. Several fault structures are evident and host vein mineralization. Later stage normal and thrust faults and shearing have chopped, deformed and remobilized the veins and mineralization. Drag features are also present. The sedimentary sequence is cut by a few felsic and mafic dikes.
On the Sunshine property the sedimentary rocks strike north and dip 50 degrees east. The underground workings include several adits on the Sunshine No. 2 and Yakima claims. On the Sunshine No. 2 claim, a series of adits explore a fissure vein striking 114 degrees and dipping 55 to 70 degrees southwest. The central part of the fissure vein is partly occupied by a mafic dike. Galena, sphalerite and pyrite with minor tetrahedrite are mainly concentrated on both sides of the dike and associated with a matrix of coarse calcite, siderite and quartz. The surface exposures of the vein are strongly oxidized.
On the Yakima claim, three short adits explore a vein striking 110 degrees and dipping 50 degrees south. The vein is within a narrow shear mostly filled with carbonate minerals. Another adit on the east side of the claim explore a third vein locally known as the Granville. Samples collected from this vein in 1939 assayed 3085 grams per tonne silver and 70 per cent lead (Property File - Prospectus, Silver Ridge Mining Company, 1939).
Production from the Sunshine property between 1895 and 1928 yielded 290,502 grams of silver, 53,470 kilograms of lead and 31 grams of gold from 105 tonnes mined.
During 2005 through 2014, Klondike Silver Corp. examined the area as apart of their Slocan Silver Camp property.
