SMDI #

0958

Historical Showing Names

Hall Deposit; Island Copper-Nickel Showing; Pyroxenite Island Showing, Rottenstone Mine

Project Name

Albert Lake

UTM Northing (NAD83 Z13)

6244461.4400

TRM (Township-Range-Meridian)

85-18-2

Associated Commodities

Copper, Gold, Palladium, Platinum

Status

Deposit: Post-Production

Geological Domain

Rottenstone

Host Minerals

Exploration History

12/1/2024 Fathom continued exploration on its Albert Lake property, which contains the historical Cu-Ni-PGE Rottenstone mine situated within the central Rottenstone Domain. A six-hole drill program located to the southwest and within 2 km of the former mine intersected anomalous nickel concentrations. (Saskatchewan Exploration and Development Highlights 2023, p.14-15) 8/11/1989 The showing was originally noted by local aboriginal people as a large, 30 foot (9.1 m) hill of 'rottenstone' and they brought to the attention of traders. In 1928, the area of the showing was staked by G. and R. Hall, for Hall Whitmore Mines Ltd. In 1929, the property was optioned to Consolidated Mining and Smelting Co. of Canada Ltd. Work outlined the ore body. Ore reserves for the deposit were published. 19 holes were completed; 15 were barren and 4 contained mineralization. Initially, Consolidated Mining estimated that the lens contained 40,000 tons of ore averaging 1.81% Ni and 1.01% Cu. They felt that the deposit was too small to be developed economically at that time, and the option was dropped the same year (AF 74A07-0005). In 1945, two grab samples were taken from the deposit. They returned assays of 0.07% and 2.07% Cu and 4.29 and 4.27% Ni respectively. In 1946, J.B. Mawdsley mapped the area in detail. Mawdsley completed ore microscopy of the Hall Deposit, the Tremblay-Olson Deposit (SMDI. 959) and the Red Hill Deposit (SMDI. 954). The claims covering the Hall Deposit lapsed in 1948. In 1950, V.J. Studer staked the VIA claim group over the Hall Deposit. In 1951, Cape Copper Mines Ltd. Acquired the property. In 1952, Cape Copper completed 14 X-ray drill holes, totalling 749 feet (228 m). It is believed a further 350 feet (107 m) of drilling was completed for which there is no assessment work (Beck, 1959). In 1953, Cape Copper completed detailed geological mapping of the area and ground magnetic surveys over the deposit (AF 74A07-0004). In 1954, Trans-Dominion Mining and Oil Corporation acquired the property. They completed 19 drill holes, totalling 2867 feet (874 m) and flew an airborne magnetic survey that covered 100 square miles in the vicinity of the Hall Deposit (AF 74A07-0001). This work indicated that there was no extension to the Hall pyroxenite and that there were no proximal anomalies. In 1957, Sico Mining Corporation (Pre-Cam Exploration and Development Ltd.) obtained a mineral lease over much of the Rottenstone area that included the Hall Deposit (74A07-0007). Further drilling, in the Hall Deposit area, located a pyrrhotite zone to the northwest of the Hall Deposit. The zone contained barren sulphides in a sedimentary gneiss. Ground prospecting of airborne anomalies, located to the west of Rottenstone Lake, located further pyrrhotite ± graphite (AF 74A07-0007). Ground magnetic and EM surveys were conducted and the one follow-up drill hole completed intersected a diabase dyke (AF 74A07-0019). In 1959, the Hall Deposit was held in trust as ML No. 4 by W.T. Knox for Sico Mining Corporation. Ground EM and magnetic surveys were completed (AF 74A07-0012). Sico completed 17 drill holes (AF 74A07-0017). The core was assayed for Au, Ag, Cu, Ni, Pt and Pd. In 1960, Sico completed a further 9 holes in the immediate area (AF 74A07-0007) and completed a detailed EM and magnetic survey (AF 74A10-0005) that was used to determine a northeast plunge for the Hall Deposit. A further 6 holes, 3 of which intersected good widths of Cu-Ni, were completed on the deposit. Sico allowed ML 4 to lapse. In 1962, B.R. Richards restaked the deposit as PAL 1-3 and PLAT No. 1 claims. 2 short holes, totalling 69 ft (21 m), were drilled on the deposit. Between 1965 and 1968, Rottenstone Mining Ltd. Open pit mined the Hall Deposit. Plans were made to mine the Tremblay-Olsen Showing but this was never carried out. In 1973, four drill holes were completed (AF 74A07-0025). Cu and Ni assays varied between 1.03% to 5.88% and 0.75% to 4.75%. The property was returned to Rottenstone Mining. In 1975, C.F. Gilboy mapped the deposit area. Between 1985 and 1988, C. Dunn completed a biogeochemical survey for the Geological Survey of Canada which covered the showing. In 1985, Claude Resources Incorporated acquired ML 5057. In 1986, Bec International completed a ground EM and magnetic survey over the deposit and Fleck Resources Ltd. Completed geological mapping, prospecting, rock sampling, and ground VLF-EM and magnetic surveys over the deposit. Partridge Contracting Inc. completed a VLF-EM survey in the immediate showing area in the same year. In 1988, Claude Resources acquired the property and completed a ground EM and magnetic survey over the deposit (AF 74A07-0031). Between 1987 and 1988, Claude completed ground VLF-EM and magnetic surveys over the mine grid (AF 74A07-0035). In 1990, a partnership involving Claude Resources Inc. and Inco Exploration completed further geological mapping, prospecting, and rock sampling over the deposit (AF 74A07-0033). In 1991, the partnership completed a ground UTEM survey which covered the deposit (AF 74A01-0034). In 1997, Claude Resources completed prospecting and channel, soil, and till sampling in the immediate mine vicinity (AF 74A07-0036). In 1998, Uranco Minerals Ltd. Optioned the property from Claude Resources. Prior to acquiring the property, Uravan had completed a high resolution airborne magnetic and VLF-EM survey. Between 1998 and 1999, Uravan completed ground TEM/TFM surveys immediately around the deposit and a helicopter-assisted biogeochemical survey. This was followed up by a 9 hole phase 1 drill program to test the on-strike area immediately to the northeast of the open pit. Drill holes RL99001, 2, 8, and 9 were completed at the open pit. The better values are reported above. In 1999, a Claude Resources-Uranan Minerals partnership completed ground TDEM and magnetic surveys that covered the deposit (AF 74A07-0037). Between 1998 and 2000, Uravan completed 23 drill holes (RL99-1 to -9 and RL00-10 to -23), drill hole petrographic and alteration studies and ore microscopy, fixed wing VLF, magnetic , landsat and airphoto image (structural) surveys, ground TEM and magnetic surveys (AF 74A-0038), and a helicopter-borne biogeochemical survey (AF 74A07-0039) over the Rottenstone Property. The drilling and ground geophysics were completed exclusively on this deposit. On 5 February 2001, Uravan re-staked ML 5057 as S-106565. Between 2001 and 2002, Uravan completed soil sampling, a ground TDEM survey, and 5 drill holes (RL02-24 to -28: at the mined-out area) on the areas referred to as Zone 1 (the mined-out area) and Zone 2 (200 m or656.2 ft) north of the mine site - an 1400 m long by 200 m wide area of anomalous Ni, Cr, Pt, Pd soil values) (AF 74A07-0040). During this program, the Island Showing and the Pyroxenite Island Showing were mapped and channel sampled. Between 2002 and 2003, Uravan Minerals completed ground gravity and IP/Resistivity surveys and 12 drill holes (RL03-29 to -40) on the deposit (AF 74A07-SW-0041). No economic intersections were encountered. In the winter of 2003, they completed a further 9 drill holes (RL23-29 to RL23-37) to further test the Rottenstone Mine horizon (AF 74A07-SW-0043). In 2005, K. MacLachlan et al re-mapped the showing area at a scale of 1:50,000.

Reserves and/or Resources

1989-08-10 D.R. Jones – R. Greenshields The deposit has a tonnage of 50,000 to to 60,000 tons grading 2% Ni, 2% Cu, 0.22 oz/ton Pt, and 0.15 oz/ton Pd. Summary: Historic reserve (unspecified) of 55,000.00 ton - Copper @ 2 % - Nickel @ 2 % - Palladium @ 0.15 oz/ton - Platinum @ 0.22 oz/ton 1968-01-01 Mining delineated reserves: approximately 40,000 tons of ore grading 3.23% Ni, 1.83% Cu, 0.14 oz/ton Pt, 0.10 oz/ton Pd, 0.03 oz/ton Au, and 0.20 oz/ton Ag. (26,724 tons were mined and milled) Summary: Historic reserve (unspecified) of 40,000.00 ton - Copper @ 1.83 % - Gold @ 0.03 oz/ton - Nickel @ 3.23 % - Palladium @ 0.1 oz/ton - Platinum @ 0.14 oz/ton - Silver @ 0.2 oz/ton 1928-01-01 40,000 tons of ore averaging 1.81% Ni and 1.01% Cu. Summary: Historic reserve (unspecified) of 40,000.00 ton - Copper @ 1.01 % - Nickel @ 1.81 %