Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F13SE00052

Record: MDI52F13SE00052

General

Commodities

Primary Commodities: Thorium, Uranium

Location

Township or Area: Bridges

Latitude: 49° 50' 22.26"    Longitude: -93° 40' 27.06"

UTM Zone: 15    Easting: 451522.832   Northing: 5521005.623    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F13SE

Point Location Description: Uranium site determined from sample location in Kenora Assessment File, 52F13SE KK-2 AFRO 2.41986

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

In 2008 Delta Uranium Inc. conducted a sampling program to test historical and mineral occurrences and target anomalous areas identified by their airborne radiometric geophysical survey. A surface sampling master map illustrating sampling location and assay results in presented in Kenora District Geologists Assessment File, Delta Uranium Inc., 52F13SE KK-2 AFRO 2.41986

Assessment Work on File

Geology

Province: Superior

Geological Age: Precambrian  

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., 52F13SE KK-2 AFRO 2.41986

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., 52F13SE KK-2 AFRO 2.41986

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. Reference: Kenora District Geologists Assessment File, Delta Uranium Inc., 52F13SE KK-2 AFRO 2.41986

Jun 22, 2022 (Q Unknown) - Uranium was first discovered in the Kenora area in 1949 near the shore of Willard Lake. This was followed by the discovery of the Richard Lake deposit by Campbell and McFarland in the early 1950s and numerous other occurrences, including Hawk Lake, Bee Lake, Kenoratomic, Quebec Ascot, and Viceroy. To 2008, Richard Lake (MDI52F13SW00044) still shows the highest uranium concentrations. Falling uranium prices in the 1950s lead to little exploration in the area until the 1970s when the Ontario Geological Survey (OGS) mapped west of Richard Lake and found numerous additional showings (Pryslak, 1976).

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: 51  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: 90  Date: 1984

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

Publisher Name: Ontario Geological Survey

Location:

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.

Terms of Use

Please review our Terms of Use agreement for this data product.

Ministry Contact Information

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