Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31F04NW00019

Record: MDI31F04NW00019

General

Mineral Record Identification
Record Name(s) Plunkett South Mine - 1921, Plunkett South - 1921
Related Record Type Compound
Related Record(s)
Record Status Occurrence
Date Created 1986-May-13
Date Last Modified 2023-May-25
Created By
Revised By

Commodities

Primary Commodities: Feldspar (Nonmetals), Mineral Specimen

Secondary Commodities: Thorium, Amethyst, Uranium



Location

Township or Area: Monteagle

Latitude: 45° 9' 16.67"    Longitude: -77° 49' 30.13"

UTM Zone: 18    Easting: 277943.997   Northing: 5004010.995    UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31F04NW

Point Location Description: approximate

Location Method: Data Compilation

Access Description: 0.6 km south of road south of Macdonald Mine.



Exploration History

1921: American Molybdenite Limited - stripping, pitting. 1927: S. Orser - in production


Geology

Province: Grenville

Subprovince: Central Gneiss Belt

Geological Age: Mesoproterozoic  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Pegmatite 1 Granitic Host
Gneiss-Unsubdivided 2 Migmatitic Contains
Amphibolite 3 Hanging Wall

Lithology Comments

Feb 24, 2012 (A Wilson) - The pegmatite dike strikes N50E and has a width of 20-25 feet and extends for 175 feet along strike. The dike appears to be zoned into a white albite-quartz pegmatite wall zone and a pink microcline-quartz zone. Scapolitic pyroxenite also occurs in the vicinity of the dike.




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1AllaniteEconomicOre
2AmethystEconomicOre
3BiotiteEconomicOre
4BetafiteEconomicOre
5EllsworthiteEconomicOre
6EuxeniteEconomicOre
7FeldsparEconomicOre
8FluoriteEconomicOre
9GarnetEconomicOre
10MicroclineEconomicOre
11MolybdeniteEconomicOre
12TitaniteEconomicOre

Mineralization Comments

Feb 24, 2012 (A Wilson) - A grab sample collected by the OGS (R-77-44-4) from the hornblende rich phase of the pegmatite assayed 8 ppm U3O8 and 608 ppm Th. A grab sample collected from a fracture in the pegmatite (R-77-44-2) assayed 10 ppm U3O8 and 1733 ppm Th. Sample R-77-44S-1 collected from a very hot spot on the pegmatite assayed 2500 ppm U3O8 and 5.2% Th.


Dec 07, 2005 (D Laidlaw) - Varieties: peristerite and amazonite.



Mineral Record Details

Classification
RankClassification            
1 Pegmatite

Mineral Zones - Size and Shape

Zone Name: Detour Lake - Rank 1
Shape Length Thickness Depth Strike Dip Plunge Trend Age Reference
Tabular 53 8
Production Data
Year Tonnes Commodities Reference Comment
1927 54 MDC022, P. 141 60 tons production

References

Publication - Feldspar, Canada Mines Branch Publication 731

Publication Number: CMB Pub 731 Page: 44  Date: 1932

Author: Spence, H. S.

Publisher Name: Canada Mines Branch

Location: https://doi.org/10.4095/307887


Part - Geology of Monteagle and Carlow townships

Publication Number: ARV63-06 Page: 39-40  Date: 1998

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:


Mono - Pegmatite mineral resources of Ontario

Publication Number: IMR021 Page: 20  Date: 1997

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:


MonoMap - Industrial minerals of the Pembroke-Renfrew area, part 2

Publication Number: MDC022 Page: 122-123, 140-141  Date: 1981

Author: Storey C.C., Vos M.A.

Publisher Name: Ontario Geological Survey

Location:


MonoMap - Radioactive mineral deposits of the Pembroke-Renfrew area

Publication Number: MDC023 Page: 114-115, 120-121  Date: 1981

Author: Masson S.L., Gordon J.B.

Publisher Name: Ontario Geological Survey

Location:


Mono - Uranium and thorium deposits of southern Ontario

Publication Number: OFR5311 Page: 288  Date: 1981

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

Publisher Name: Ontario Geological Survey

Location:


Mono - Granitic pegmatites of the Bancroft area, southeastern Ontario

Publication Number: OFR5717 Page: 95-96  Date: 1990

Author: Goad B.E.

Publisher Name: Ontario Geological Survey

Location:


Map - Precambrian Geology, Bancroft Area

Publication Number: P3385 Scale: 1:50,000    Date: 1998

Author: Lumbers S.B., Vertolli V.M.

Publisher Name: Ontario Geological Survey

Location:


Map - Monteagle and Carlow townships, County of Hastings, Ontario

Publication Number: M1954-03 Scale: 1:31,680    Date: 1997

Author: Hewitt D.F.

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