Dinty Lake Nickel Deposit
The Dinty Lake Nickel Project is comprised of +968 hectares, located 300 m (984.3 ft) east of the north-northwest trending bay of Dinty Lake, ~40km northwest of Uranium City in northern Saskatchewan.
Access is 20min by floatplane (operated by Transwest and Osprey) from the settlement of Stony Rapids. In 1942, the Borealis Syndicate identified a reserve of 1.5 million tons containing up to 0.6% Ni (up to 21M lbs. Ni) This estimate was made from shallow diamond drilling programs. The core has not been re-evaluated and this figure is not NI43-101 compliant. Exploration at Dinty Lake will be to reconfirm and expand historic figures. Several extensions have been identified through past programs.
The deposit is underlain by a small sill-like norite body. The norite is enclosed in felsic gneisses of the Nivens domain. The rocks have been metamorphosed to granulite facies. The norite has been dated at 2.55± 0.23 Ma using Nd-Sm methods. The norite intrusive is a layered body of northosite, anorthositic norite, norite, feldspathic pyroxenite, pyroxenite and their metamorphic equivalents.
The main mineralized norite body has a northerly trend and dips to the west. At a depth of 200 ft (61.0) the body apparently narrows and ends. The ore zone is at least 300 m (984.3 ft) long and 65 m (213.3 ft) wide. The mineralization consists of pyrrhotite as cementing material, fracture fillings and disseminations. Small amounts of chalcopyrite and sphalerite are present. Molybdenite has been reported. Cubanite occurs as spherical inclusions in the pyroxenes. The greatest accumulation of sulphides is underlain by a thin layer of orthopyroxenite that is, in turn, underlain by norite.
Drilling, completed between 1936 and 1942, and outlined a deposit. Selected samples assayed up to 0.94% Ni, 0.04% Cu, 0.01 oz./ton Au and 0.10 oz./ton Ag. The main body has a maximum width of 200 ft (61.0 m) and has been traced by 8 trenches and outcrops for 900 ft (274.3 m).
In 1936, Borealis Syndicate, a subsidiary of Consolidated Mining and Smelting, obtained the property around Dinty Lake. Prospecting led to the discovery of this nickel deposit on Dinty Lake. In 1936, several trenches were excavated and 12 diamond drill holes were put down. The work continued until 1942. At this time, the deposit reserves were released. Samples were taken and assayed and returned the values listed above.
In 1951, Goldfields Uranium Mines Ltd. restaked the ground as the ACHAK Claims. They completed a magnetometer and geological survey over the group that resulted in the addition of several small norite intrusions to the main intrusive body, the most important one being situated 1,400 ft (426.7 m) northwest of the north end of Dinty Lake. As a result additional claims were staked and 10 holes totalling 2,073 ft (631.9 m) were put down to test all known surface exposures of norite at depth.
In 1954, the Dinty Lake area was geologically examined by D.A. Blake of the Geological Survey of Canada.
In 1965, Tremar Mines Ltd. carried out a ground magnetometer survey and did some additional trenching and sampling. The results were similar to those already reported in all elements. Further work was recommended, but not carried out. In 1979,
Sunexco Energy Corporation completed airborne EM, radiometric and magnetic surveys and ground EM and magnetic surveys in the showing area. In 1987, the property was examined by L. Hulbert of the Geological Survey of Canada.