Renprior Mine, Admaston Township, Admaston/Bromley, Renfrew County, Ontario, Canadai

Regional Level Types
Renprior Mine	Mine
Admaston Township	Township (Abolished)
Admaston/Bromley	Township
Renfrew County	County
Ontario	Province
Canada	Country

Zinc ore was found on the property [lot 2, concession III] in the summer of 1922. Messrs. Joseph Legree and William Dean acquired the mineral rights and opened up a pit. In the autumn of 1926 the Coniagas Company [Coniagas Mines, Limited] took an option on the property. A considerable amount of surface stripping and trenching was carried out and five diamond drill holes were put down.. . . Early in 1926 the Ottawa Valley Syndicate [Ottawa Valley Mines, Limited] in turn took up an option on the property and carried out diamond-drilling. In the spring of 1926 the British Metal Corporation (Canada), Limited, carried out about 2,000 feet of diamond-drilling on the property.
(Alcock F.J.)

The marbles of the property have been subdivided into three types: 1) calcitic marble; 2) dolomitic marble; 3) silicic dolomitic marble. The marbles host all known zinc (minor lead) mineralization on the property. The calcitic marble unit which is generally white, very soft and easily eroded serves as a stratigraphic marker unitfor the property. The calcite marble is medium to coarse grained, with generally less than 10% accessory minerals.These include phlogopite, dolomite, quartz, tremolite and with sparse diopside serpentine, tremolite and phlogopite. Minor pyrite and sphalerite are present. Varying amounts of sphalerite have been noted within the calcite marble as well as at thecontact of the calcite and silicated dolomitic marble. The dolomitic marbles are commonly medium to coarsely crystalline, white to buff coloured and distinct in field appearance from calcite marble on the basis of weathering surface and non-reaction to dilute HCl. The dolomitic marble contains greater than 30% dolomite and lQ-15% accessory minerals phlogopite, calcite, diopside-serpentine, tremolite, quartz, apatite). Variations include pink and grey dolomitic marble. Hematitization of the dolomitic marble is locally extensive. Sphalerite, galena, pyrite, pyrrhotite and graphite occur in the dolomitic marble unit,with zinc and lead mineralization approaching significant proportions. The most commonly mineralized unit on the property is the silicated dolomitic marbles. This unit contains greaterthan 20-25% calc-silicate minerals, principally diopside, tremolite and quartz. A spatially related rock type occurring within the silicated dolomitic marble unit is a quartz-diopside rock and/or quartzite unit. The diopside is usually white to green in colour, fine to very coarse grained. Yellowish-brown to green serpentine clots and patches are common. Tremolite is generally very acicular and rosettes are common. Quartz isnot nearly as abundant and is generally fine grained and smokey in colour. Small clots and patches (cm scale) of anhydrite occur within silicated dolomitic marble unit.

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References