Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52E10SW00017

Record: MDI52E10SW00017

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Silver, Zinc

Location

Township or Area: Snowshoe Bay Area

Latitude: 49° 35' 28.45"    Longitude: -94° 58' 25.32"

UTM Zone: 15    Easting: 357359.59   Northing: 5495055.27    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52E10SW

Point Location Description: Precise

Location Method: Conversion from MDI

Access Description: During the season when the lakes are not frozen over, the propertycan be reached by air from Kenora, Ontario, 24 miles, by boat from Kenora, 45 miles, and by road and boat, 26 miles west from Kenora on Highway 17 and south on the Rush Bay road to Clytie Bay on Shoal Lake. From Clytie Bay it is two miles by boat to the Cedar Island Mine.

Exploration History

1896: Gold was discovered by S. Whiting. Property was sold to Anglican Mining and Finance Company Ltd. and a vertical shaft was sunk to a depth of 75 feet (23 m). 1897: property was sold to Cedar Island Gold Mining Company of Ontario Ltd and underground operations commenced. 1898: mine was allowed to flood. 4 DDH were drilled.1928: property was acquired by Kenora Prospectors and Miners Ltd. (KPM). 1929: KPM conducted some prospecting. 1932: KPM carried out prospecting. 1934: a vertical shaft in the north-central part of the island was deepened and a level was established at 283 feet (86 m). Other levels were cut at depths of 383 feet, 500 feet, and 625 feet. 1935-36: mine was operated by Kenora Prospectors and Miners Ltd. Mine was closed in September 1936. 1968: KPM conducted EM surveys. 1972-73: KPM carried out trenching and geophysical surveys. 1980-81: Denison Mines Ltd. optioned the property and completed limited ground geophysics, minor trench sampling and drilled 3 DDH totalling 934 m, as well as sampling the tailings. 1985: St. Joe Canada Inc. optioned the property from Kenora Prospectors and Miners (KPM) 1987-88: Bond Gold Canada Inc. (formerly St. Joe Canada) carried out geological mapping, sampling, geophysical surveys, and drilled 127 DDH totalling 27,288 m. 2004: Amador Gold Corp. drilled 35 DDH totalling 10,011 m, mainly on the Cedar Island Mainland deposit. 2013: Cougar Metals optioned the property from Kenora Prospectors & Miners. 2015: Cougar Metals commenced legal action against KPM with regard to alleged breaches of certain representations and warranties made by KPM under the option agreement. 2016: arbitrator awarded costs to Cougar.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  

Geology Comments

Feb 09, 2011 (C Ravnaas) - Detailed mapping suggests a geological history for the Property. Shallow water marine deposition of mafic-ultramafic flows and intrusion of subvolcanic mafic sills was followed by a period of isoclinal folding, producing the Gull Bay-Bag Bay Anticline. Intrusion of the Canoe Lake stock into the volcanic succession resulted in the eastward deflection of the isoclinal axis and brittle, subvertical faulting. Gold deposition and hydrothermal alteration occurred along zones of structural weakness (i.e. shearing along lithological contacts) and felsic dykes intruded both the structural zones and the volcanic rocks. Gold and hydrothermal fluids were derived from ascending felsic magmas generated during tectonism and metamorphism. Lamprophyre dykes, followed by a final episode of faulting, later intruded the area. (Reference from Everton Resources Ltd. Technical Report on RESOURCE UPDATE ON THE KPM SHOAL LAKE PROJECT Mar 2010)

Lithology

Lithology Comments

Jan 15, 2020 (Therese Pettigrew) - The Cedar Island Mine, Mikado Mine, Olympia Mine, Breccia Vein, Bullion No. 1 and 2 and the Old Ontario Occurrences are examples of deposits occurring in mafic volcanic rocks near the margin of the Canoe Lake intrusion and represent the "faults and shear zones" type of structural setting (Assessment report 20000013527). The main gold-bearing feature in this mine is the north-west striking south dipping No. 1 Vein. It occurs as narrow, discontinuous quartz veins and stringers in a lightly pyritized felsic shear in basaltic lavas (Assessment report 52E10SW8559).

Mineralization

Mineralization Comments

Jan 15, 2020 (Therese Pettigrew) - The Cedar Island Mine was developed by two shafts: an incline shaft to a depth of 150 feet and a vertical shaft to a depth of 625 feet. The lowest level in the incline shaft is at 144 feet. The first development level in the vertical shaft is at 283 feet, so the two shafts are not connected by lateral workings. Most of the gold production came from the No. 1, No. 2, and No. 3 Veins near the north end of the where the No. 1 Vein outcrops and on which the incline shaft was located. A number of other veins were encountered in surface and underground diamond drill holes (Assessment report 52E10SW8558). The main gold-bearing feature in this mine is the north-west striking south dipping No. 1 Vein. It occurs as narrow, discontinuous quartz veins and stringers in a lightly pyritized felsic shear in basaltic lavas. Two of three holes drilled below the lowest mine workings of the 625 foot level cut felsic shear with attendant quartz. Very low sporadic gold values also occur in mineralized tuffs striking north-east through the mine workings. These tuffs also carry local heavy concentrations of pyrite, pyrrhotite, chalcopyrite and sphalerite. Production to closing in 1936 amounted to 17,050 tons grading 0.29 oz Au/ton. Drilling in 1981 below the deepest mine workings (625’ level) of the Cedar Island No.1 Vein was carried out to check for the depth continuation of the vein. Hole C81-1 cut two narrow sections with quartz stringers with low gold values south of the No.1 Vein. No. 1 Vein was not intersected. Holes C81-1 and C81-2 cut "vein type" felsic shears with quartz north of the depth projection of Vein No. 1. The "vein type" felsic shear is identical to a felsic shear with quartz and pyrite found in Trench H on the mainland ,1,000 feet south east of Cedar Island on the projected strike of No. 1. Vein. One sample over 1.6 feet of the 5.6 foot vide shear assayed 0.68 oz Au/ton. Another sample on the same shear 1150 feet farther south east ran 1.73 oz Au/ton over 1.9 feet. Hole C81-2 cut 2.9 feet of the "vein type" shear which assayed 0.014 oz Au/ton and another similar section ran 0.05 oz Au/ton over 1.1 feet. Hole C81-3 cut 9.5 feet of "vein type" shear with quartz and pyrite which averaged 0.026 oz Au/ton. Both intersections lie north of the projected plane of No. 1 Vein and could represent parallel vein fractures or a change in vein dip from a south dip at surface to a north dip below the 625 foot level (Assessment report 52E10SW8559). A sample of pyritiferous quartz, from the open cut on the south end of the island, assayed 100 ppb gold and 425 ppm arsenic. A sample of the brecciated sulphide vein, from the northeast portion of the island, contained 50 ppb gold and 3600 ppm zinc. A sample of unaltered, massive basalt contained <2 ppb gold. Sampling of the tailings by Denison Mines in 1981 revealed 10,510 tons grading 0.064 oz Au/ton (Davies and Smith, 19888).

Mineral Record Details

References

MonoMap - Geology of the Shoal Lake-Western Peninsula area, District of Kenora

Publication Number: OFR5242 Page: 63-65, 90-93  Date: 1978

Author: Davies J.C.

Publisher Name: Ontario Geological Survey

Location:

Mono - The geological setting of gold occurrences in the Lake of the Woods area

Publication Number: OFR5695 Page: 59-63  Date: 1988

Author: Davies J.C., Smith P.M.

Publisher Name: Ontario Geological Survey

Location:

Mono - Gold deposits of the Kenora-Fort Frances area, districts of Kenora and Rainy River

Publication Number: MDC016 Page: 13  Date: 1976

Author: Beard R.C., Garratt G.L.

Publisher Name: Ontario Division of Mines

Location:

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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office