Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI53C13SE00061

Record: MDI53C13SE00061

General

Commodities

Primary Commodities: Uranium

Secondary Commodities: Thorium, Molybdenum

Location

Township or Area: Setting Net Lake Area, South Of Favourable Lake Area

Latitude: 52° 46' 45.01"    Longitude: -93° 45' .01"

UTM Zone: 15    Easting: 449411   Northing: 5847968.99    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 53C13SE, 53C13SW

Point Location Description: Location taken as Bear Creek Showing (Showing 1B) of Robertson and Gould (1983).

Location Method: Data Compilation

Access Description: Remote. The Bear Head Trend Property is accessible by float- or ski-equipped fixed wing aircraft from Red Lake, or by winter road during freeze-up conditions.

Exploration History

1929: Ontario Dept. of Mines survey by M.E. Hurst. 1955: Cam Mines Ltd. conducted surface mapping, aerial and ground radiometric surveys, trenching and 7 DDH totalling 1423 ft were drilled. Favourable Mines drilled 3 DDH for a total of 1250 ft. 1968: CAM Mines Ltd. drilled 7 DDH totalling 1416 ft. 1969: Keevil Mining Group Ltd. conducted stripping, trenching, blasting, scintillometer surveys and drilled 8 DDH totalling 7084 ft. 1971: Keevil Mining dug 26 trenches on Zones A-F and West. 1977: Kerr Addison Mines Ltd. and Dolores Bench Resources drilled a total of 29,871 ft. 2009-10: Shoreham Resources Ltd, completed line cutting, MMI samples, grab samples, airborne survey and spectrometer surveys in the area.

Assessment Work on File

Geology

Province: Superior

Subprovince: Berens River

Terrane: North Caribou

Belt: Favourable Lake

Geological Age: Neoarchean  

Geology Comments

Nov 01, 2007 (Mark Puumala) - The Bearhead Lake prospect consists of a number of zones of significant uranium mineralization that are located along a west-northwest trend that parallels the Bear Head fault zone for a distance of approximately 5 km. These zones generally occur along the south shore of Bear Head Lake and include the East, Camp, Bear Creek and Father showings of Winter (1956). This prospect is located near the northwest end of a longer series of fault zone-parallel uranium showings (many that are not MDI occurrence-grade) that cover a strike length of 38.8 km between the following UTM coordinates: Zone 15, 444004E, 5850346N and Zone 15, 477437E, 5830608N (Robertson and Gould 1983). Robertson and Gould (1983) indicate that the uranium mineralization in this area occurs in pegmatite-bearing zones at the 290 to 295-striking contact between biotite-granite gneiss to the south, and a migmatite-granite gneiss-pegmatite complex to the north. The migmatitic rocks are part of a peraluminous intrusion mapped by Stone (1998) on OGS Map P.3382, while the biotite-granite gneiss is part of the Bear Head Lake batholith.

Lithology

Mineralization

Mineralization Comments

Jan 12, 2012 (Mark Puumala) - Patrick (1970) indicates that the most significant uranium values are associated with pegmatites, pegmatized and silicified gneisses and adjacent areas in granite. Primary uranium minerals are indicated by Patrick (1970) to include uranothorite and possible uraninite, with the latter occurring as microscopic grains within strongly radioactive clusters of biotite and/or hornblende in pegmatite or pegmatized gneiss. Sphene, ilmentite, pyrite and pyrrhotite are also found in association with the uranium mineralization. In addition, yellow uranophane is commonly observed as surface oxidation. Other minerals noted by Winter (1956) include chalcopyrite, bornite and zircon. A number of additional characteristics common to uranium-bearing zones that were noted by Bond and Breaks (1978) include the occurrence of smokey grey quartz pods, magnetite, and syenitic intrusive phases. Molybdenite is reported by Patrick (1970) to occur in pegmatite, pegmatitic granite and related rocks. However, he indicates that there is no direct correlation between molybdenite and uranium mineralization. Bond and Breaks (1978) noted that the localization of mineralization in this area is likely to be related to proximity to the Bear Head fault zone, and proximity to a metasedimentary (i.e., migmatite) rock sequence. They suggested that mineralization may be explained by derivation of felsic intrusion-related mineralizing solutions from a deep-seated source along the fault, with partially-melted sedimentary rocks representing at least a part of the uranium source. Winter (1956) reported that petrographic analyses indicate that the microscopic uraninite occurs as fine disseminations in minute fractures, and that it is likely to have been derived from hydrothermal solutions during the later phases of magma solidification. Robertson and Gould (1983) indicate that a 1977 diamond drilling program (66 holes) carried out by Kerr Addison Mines and Dolores Bench Resources outlined a deposit with indicated reserves of 994 471 tonnes grading 0.06% U3O8 to a depth of approximately 150 m.2010: Shoreham Resources: completed MMI samples and grab samples near the area, most significant assays returned 0.06%-.01% U.

Feb 27, 2015 (Therese Pettigrew) - The Bear Creek showing strikes N68-70W, is 200 ft long and 25-30 ft wide. Assays ranged from 0.009 to 0.209 percent U3O8 (MDC025).

Mineral Record Details

Mineral Zones - Size and Shape

References

Map - Setting Net Lake area, District of Kenora (Patricia Portion)

Publication Number: P0538 Scale: 1:15,840    Date: 1997

Author: Ayres L.D.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Molybdenum deposits of Ontario

Publication Number: MDC007 Page: 43-44  Date: 1968

Author: Johnston F.J.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Uranium and thorium deposits of northern Ontario

Publication Number: MDC009 Page: 59-60  Date: 1968

Author: Robertson J.A.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Uranium and thorium deposits of northern Ontario

Publication Number: MDC025 Page: 74-75  Date: 1984

Author: Robertson J.A., Gould K.L.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Precambrian Geology of the Berens River Area, Northwestern Ontario

Publication Number: OFR5963 Date: 1998

Author: Stone D.

Publisher Name: Ontario Geological Survey

Location:

Article - Ground evaluation of airborne radiometric anomalies in northwestern Ontario

Publication Number: MP082.005 Page: 22-27  Date: 1997

Author: Bond W.D., Breaks F.W.

Publisher Name: Ontario Geological Survey

Location:

Map - Precambrian Geology, Favourable Lake

Publication Number: P3226 Scale: 1:50,000    Date: 1993

Author: Stone D., Fogal R.I., Fitzsimon S.

Publisher Name: Ontario Geological Survey

Location:

Map - Favourable Lake to Sandy Lake area, District of Kenora (Patricia Portion), Ontario

Publication Number: ARM38A Scale: 1:126,720    Date: 1997

Author: Hurst M.E.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological compilation series, Favourable Lake-Poplar Hill area, Indian Village-Moose Mountain sheet, District of Kenora (Patricia Portion)

Publication Number: P0769 Scale: 1:126,720    Date: 1972

Author: Ayres L.D., Raudsepp M., Averill S.A., Edwards G.R.

Publisher Name: Ontario Division of Mines

Location:

Map - Geological compilation series, Favourable Lake-Poplar Hill area, Deer Lake sheet, District of Kenora (Patricia Portion)

Publication Number: P0768 Scale: 1:126,720    Date: 1972

Author: Ayres L.D., Raudsepp M., Averill S.A., Edwards G.R.

Publisher Name: Ontario Division of Mines

Location:

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