Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F13SW00041

Record: MDI52F13SW00041

General

Commodities

Primary Commodities: Uranium

Secondary Commodities: Molybdenum, Thorium

Location

Township or Area: Tustin

Latitude: 49° 50' 47.79"    Longitude: -93° 50' 48.07"

UTM Zone: 15    Easting: 439128   Northing: 5521920.01    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F13SW

Point Location Description: DDH BL08-001 in AFRI 20000003627

Location Method: Conversion from MDI

Access Description: The western part of uranium-bearing areas is located approximately 30km east of the city of Kenora and the eastern boundary of area is located 50km west of the town of Dryden. Access to the area is via the Trans Canada Highway, bush roads and all terrain vehicle. The Trans Canada Pipeline, the Canadian National Railway and the Canadian Pacific Railway all lie parallel to the Trans Canada Highway for the majority of the property - see topo maps or Landsat images for best access to site.

Exploration History

1955: Continental Mines Ltd. drilled 3 DDH totalling 261.5 m. 1957: Tustin Mines Ltd. conducted ground magnetometer and scintillometer surveys. 1968: Olympia Mines Ltd. drilled 6 DDH totalling 373.7 m. 2008: Delta Uranium Inc. conducted an airborne radiometric geophysical survey, prospecting, sampling and drilled 12 DDH totalling 1111.27 m.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  

Geology Comments

Mar 03, 2011 (C Ravnaas) - The felsic intrusions of the Kenora area consist of granitoid stocks and plutons with the Dryberry Batholith Complex (DBC) encompassing the southern intrusive portion of the Kenora property. Sanborn & Barrie (1991) investigated the DBC in order to determine if the Archean batholithic complex played a role in the mineralization of the adjacent metavolcanic sequences, such as the Lake of the Woods and Vermillion Bay belts. Numerous occurrences of uranium and base metal mineralization are found within the area. Uranium occurrences are often found associated with granite/pegmatite dykes and sills, while base metal mineralization is found within volcanic rocks. Reference: Kenora District Geologists Assessment File, Delta Uranium Inc (20000004302)

Lithology

Lithology Comments

Mar 03, 2011 (C Ravnaas) - Uranium occurrences are often found associated with granite/pegmatite dykes and sills. During the 2008 Delta Uranium's sampling program, 99% of samples taken were of granites or pegmatitic granites found in either massive form or dykes. The uranium mineralization found in the granitic and pegmatitic rocks are commonly found on the flanks of the felsic intrusions and at the margins of metasedimentary rafts. The high uranium areas are often found near uranium depleted metasedimentary rocks. Metasedimentary rocks are often observed in bands intersecting the granites. These metasedimentary rocks are thought to be raft pieces, resulting from the intrusion of the granites. These metasedimentary rafts do not host uranium mineralization. The contact reaction that is the cause of the uranium concentrations is thought to be caused by magmatic and possibly late magmatic-hydrothermal processes during emplacement. Another unique relationship is the association between massive magnetite and the occurrence of high uranium concentrations. Disseminated magnetite is also associated with higher concentrations of uranium in many other occurrences. Mineralization consists of fine-grained uraninite (and probably uranothorite), while on surface one can often observe yellow, powdery secondary uranium minerals (probably including uranophane). In many areas of the Kenora property, a relationship is observed between high uranium occurrences and the presence of biotite (less commonly the presence of muscovite). Reference: Kenora District Geologists Assessment File, Delta Uranium Inc. (20000004302)

Mineralization

Mineralization Comments

Mar 03, 2011 (C Ravnaas) - The granitoid intrusions in this part of the Kenora District have potential for hosting a low-grade, high tonnage uranium deposit, similar to a Rossing-type uranium model. Rossing-type mineralization consists of disseminated uranium in coarse-grained felsic intrusive, often referred to as alaskite. Prospected based on a 2008 diamond drill program where hole BL08-001 intersected 1.65 m grading 1005 ppm U3O8 or mentioned as 0.10% U3O8 which is also 2.01 lbs U3O8. Drill hole BL08-002 intersected 2.9m grading 326 ppm U3O8. Reference Kenora District Geologists Assessment File, Delta Uranium Inc. (20000003627) Occurrences based on a 2008 surface sampling master map illustrating sampling location and assay results presented by Delta Uranium indicate the site returned: 1 samples which returned between 2000 to 4000 ppm U3O8; 4 samples which returned between 1000 to 2000 ppm U3O8; 8+ samples which returned between 100 to 1000 ppm U3O8. A detailed sample map with assay results for Bee Lake site examination by Delta Uranium 2008 exploration program is presented assessment file. Reference: Kenora District Geologists Assessment File, Delta Uranium Inc. (20000004302)

Nov 22, 2017 (Therese Pettigrew) - Uranium mineralization is contained in an irregular pegmatite mass with a maximum thickness of 30.5 m and a length of 823 m. The dyke decrease in thickness with depth. The dyke trends N80W and dips 30 to 60 degrees N. Radioactivity levels were up to 8 times the background (Roberston and Gould, 1983). The occurrence is located approximately 46.7 km ENE of Kenora, on the west shore of Bee Lake. Trenching and diamond drilling have been concentrated on the area west of Highway 17 on historic claim K365656 and to a lesser extent on the SW shore of Bee Lake, east of Highway 17 on historic claim K365657.

Mineral Record Details

References

Mono - Uranium and thorium deposits of northern Ontario

Publication Number: MDC009 Page: 62  Date: 1968

Author: Robertson J.A.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the Bruin Lake-Edison Lake area, District of Kenora

Publication Number: R130 Page: 36  Date: 1976

Author: Pryslak A.P.

Publisher Name: Ontario Division of Mines

Location:

Mono - Uranium and thorium deposits of northern Ontario

Publication Number: MDC025 Page: 91  Date: 1984

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

Publisher Name: Ontario Geological Survey

Location:

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