Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI41N08SW00002

Record: MDI41N08SW00002

General

Commodities

Primary Commodities: Uranium, Thorium

Secondary Commodities: Copper, Molybdenum

Location

Township or Area: Larson

Latitude: 47° 22' 10.52"    Longitude: -84° 23' 38.79"

UTM Zone: 16    Easting: 696738.725   Northing: 5249529.329    UTM Datum: NAD83

Resident Geologist District: Sault Ste. Marie

NTS Grid: 41N08SW

Point Location Description: Trenching

Location Method: Conversion from MDI

Access Description: 1 kilometre south of Lionel Lake, 2.9 kilometres west of the east boundary of Larson Township.

Exploration History

Rusty weathered rocks were noted on the south shore of a small lake near Little Agawa Lake 20 years ago by two trappers (Soulier and Gillepie). The two men returned to the showing and having determined that the rocks were radioactive staked 18 claims in partnership with Robertson and Lyman Buck. On the strength of this showing, staking was expanded by two other groups. Bob Campbell of Herbert Lake staked 54 claims north, west and south of the showing. Errington, Messenger, Martin and Hunter staked 36 claims to the east. The original stakers group, then staked 36 claims to the south east.

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Geological Age: Archean  

Mineralization

Mineralization Comments

Dec 07, 2005 (P Beach) - Radioactivity in pegmatite in granite gneiss. Narrow veins of dark grey quartz, commomnly carrying abundant pyrite, cut some of the pegmatite zones and are also radioactive. Samples collected by E.P. McDonough from trenches assayed 0.5 to 4.4 pounds U3O8 per ton and 0.2 to 3.8 pounds ThO2 per ton. (OGS 1983 MDC 25 P 35).

Mineral Record Details

Site Visit Information

Date: Sep 07, 1999

Geologist: G Bennett

Notes: A zone of rusty pergmatite 10 to 40 feet wide and at least 500 feet long contains disseminated pyrite and radioactive material. Surface showings in this zone give scattered medium to high counter readings but no visual evidence of uranium mineralization was observed. THe relations suggest that radioactive material may have been leached downwards with the oyrite and that richer ore material may lie beneath the zone of surface leaching. Drilling is required to test this. The limited evidence to date does not favour the presence of significant uranium mineralization.

References

Map - Geological series, Precambrian geology, Batchawana synoptic project, Grey Owl Lake sheet, District of Algoma

Publication Number: P3060 Scale: 1:50,000    Date: 1987

Author: Grunsky E.C.

Publisher Name: Ontario Geological Survey

Location:

Book - Northern Miner 81-03-12, Phaeton 'U'

Publication Number: NMiner Page: 8  Date: 1981

Author:

Publisher Name:

Location:

Article - 1978 report of Northeastern Regional Geologist and Sault Ste. Marie Resident Geologist

Publication Number: MP084.007 Page: 91, 93  Date: 1997

Author: Giblin P.E., Leahy E.J.

Publisher Name: Ontario Geological Survey

Location:

Mono - Uranium and thorium deposits of northern Ontario

Publication Number: MDC025 Page: 35  Date: 1984

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

Publisher Name: Ontario Geological Survey

Location:

Publication - Sudbury Timmins Algoma Mineral Program, Project 1: mineral inventory of the Sudbury-Timmins-Sault Ste. Marie region, Ontario

Publication Number: GSC OF 1087 Page: 148  Date: 1985

Author: Rose, D.G.

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/129999

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For detailed information regarding this mineral record please contact the Sault Ste. Marie Resident Geologist District Office