Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31E01SE00197

Record: MDI31E01SE00197

General

Commodities

Primary Commodities: Uranium, Thorium

Secondary Commodities: Fluorite

Location

Township or Area: Monmouth

Latitude: 44° 59' 48.85"    Longitude: -78° 11' 36.01"

UTM Zone: 17    Easting: 721220   Northing: 4986439.01    UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31E01SE

Point Location Description: southeast outlet of Wilbermere Lake near eastern boundary of township.

Location Method: Field Visit

Access Description: The occurrence area is about 450 m east northeast of the eastern-most tip of the large peninsula jutting into Wilbermere Lake.

Exploration History

1954-1955: Empire Oil and Minerals Incorporated – scintillometer and geological surveys; DD-26-12,509 ft. 1967:L. T. Chandler – AEM and AM surveys, radiometric survey. 1968-70: Canuc Mines Limited – DD-6922 ft. 1971-75: Landair Explorations Ltd. DD-8-4621 ft.; prospecting for fluorite. 1976-77: Powerex Resources Ltd. – VLF-EM and radiometric surveys; DD-6-3241 ft. 1979-1988: Uranex Resources Ltd. – rare earth sampling program; re-assaying. 2009: CJP Exploration Inc. – prospecting, sampling. 2009-2012: Skead Holdings Ltd. – prospecting, sampling, assays.

Assessment Work on File

Geology

Province: Grenville

Subprovince: Central Metasedimentary Belt

Terrane: Elzevir

Geological Age: Mesoproterozoic  

Lithology

Lithology Comments

Jan 31, 2017 (A Wilson) - Uranium mineralization occurs within lenticular, discontinuous leucogranite or granite pegmatite. The pegmatites conformably intrude syenitic rock, granite gneiss, hornblende-biotite gneiss, amphibolite and marble. These rocks strike N65ºE and dip 45-60ºS.

Mineralization

Mineralization Comments

Jan 31, 2017 (A Wilson) - DDH 5 intersected a section of mineralization that returned 1.88% U3O8 over eight feet. A 71 ft. section of drill core returned an average of 0.56% U3O8. Towards the bottom of the same drill hole, two sections returned anomalous grades of 1.26% U3O8 over 4 feet and 0.72% U3O8 over 29 feet. DDH 7 intersected a mineralized zone that returned 1.46% U3O8 over 14 feet and 0.92% U3O8 over 52 ft. DDH15 intersected a section of 0.60% U3O8 over25 ft. and a section of 0.41% U3O8 over 90 ft. DDH 21 intersected a mineralized zone that returned 0.4% U3O8 over 99.0 ft.; and an 8 ft. section of core assayed1.02% U3O8. DDH 22 intersected 0.78% U3O8 over 42 ft. DDH 23 intersected 1.59% U3O8 over 8 feet and a second section with grades of1.22% U3O8 over30.0 ft. Yttrium assays from the re-sampling program returned assays ranging from 201 ppm Yt over 7.3 ft. to 1459 ppm Yt over 6.6 ft. This is the richest known Yttrium and Rare Earth showing in the Bancroft Area. Diamond drilling has indicated that the zone has considerable length and unknown depth. It is open to the west. Adit entry is possible and would permit the recovery of a considerable tonnage of mineralization. The large swamp below and to the west of the Allanite showing contains a very extensive and relatively high grade fluorite anomaly which has never been drill tested. Two high grade grab samples were collected, one from the large west trench and one from the centre trench. The assay results are listed on the accompanying Rare Earth record sheet. Both samples returned very high values in Rare Earths and Yttrium- namely 0.2%. yttrium and 8.94%. and 10.19%. total Rare Earths and Yttrium. The core, drilled in the early 1950's is stored on the property and some of it can be salvaged and re-sampled. One notes that unsampled section of allanite are recorded in the aid drill logs. Uranium mineralization within thin lenticular, discontinous leucogranite or granite pegmatite, in uranothorite or uraninite, conformably intruding syenitic rock, granite gneiss, hornblende-biotite gneiss, amphibolite and marble. Grades and widths from the 1954-55 drilling range from 0.05% U308/2.0 feet to 0.14% U308/4.0 feet with the best intersection recorded 0.5% U308/5.0 feet. Average grade of the intersections reported is 0.077% U308.

Mineral Record Details

References

Mono - Precambrian geology of the Centre Lake area, Haliburton and Hastings counties

Publication Number: OFR5658 Page: 151-152  Date: 1987

Author: Bright E.G.

Publisher Name: Ontario Geological Survey

Location:

Mono - Uranium and thorium deposits of southern Ontario

Publication Number: OFR5311 Page: 135-136  Date: 1981

Author: Gordon J.B., Rybak U.C., Robertson J.A.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Industrial minerals of the Algonquin region

Publication Number: OFR5425 Page: 92  Date: 1983

Author: Martin W.

Publisher Name: Ontario Geological Survey

Location:

Map - Monmouth Township, Haliburton County

Publication Number: M2174 Scale: 1:31,680    Date: 1970

Author: Armstrong H.S., Gittins J.

Publisher Name: Ontario Dept. of Mines

Location:

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