Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001265

Record: MDI000000001265

General

Mineral Record Identification
Record Name(s) OGS Sample T-621 - 1978, Lake Clear - 1981
Related Record Type
Record Status Occurrence
Date Created 2011-Jun-06
Date Last Modified 2022-Jan-05
Created By A Wilson
Revised By A Wilson

Commodities

Primary Commodities: Rare Earth Elements, Uranium, Thorium



Location

Township or Area: Sebastopol

Latitude: 45° 28' 27.95"    Longitude: -77° 10' 1.21"

UTM Zone: 18    Easting: 330622.997   Northing: 5037939.997    UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31F06NE

Point Location Description: approximate

Location Method: Data Compilation



Exploration History

1977: Ontario Geological Survey - sampling, and analysis


Geology

Province: Grenville

Subprovince: Central Metasedimentary Belt

Geological Age: Mesoproterozoic  



Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
Pegmatite 1 Host
Quartz Monzonite 2 Contains
Sandstone 3 Arenite Gneissic Contains

Lithology Comments

Jun 13, 2011 (A Wilson) - A large quartz monzonite body has intruded syenite and clastic siliceous metasediments. The contact of the metasediments with the quartz monzonite is an area of considerable mixing and local radioactive mineralization is associated with a gradational contact zone from quartz monzonite to arenite. The mixed contact zone contains lenses, irregular pods and patches of pyroxene granophyres and marble, lenses of hornblende-plagioclase gneiss and dikes, veins and patches of granitic and syenitic pegmatite.




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1AllaniteEconomicOre
2ChalcopyriteEconomicOre
3PyriteEconomicOre
4PyrrhotiteEconomicOre
5ThoriteEconomicOre
6UranothoriteEconomicOre

Mineralization Comments

Jun 13, 2011 (A Wilson) - Sample T-621 collected by the OGS in 1978 returned 0.45% U3O8, 4.64% K2O, and 7.8% Th. The sample also returned 310 ppm Ce, 300 ppm La, 250 ppm N, <0.1 ppm Ta and <5 ppm Sc.



Mineral Record Details

Classification
RankClassification            
1 Pegmatite
Characteristics
Rank Characteristic            
1 Intrusive

References

MonoMap - Geology of the Clontarf area, Renfrew County

Publication Number: R209 Scale:     Date: 1981

Author: Themistocleous S.G.

Publisher Name: Ontario Geological Survey


Mono - Uranium and thorium deposits of southern Ontario

Publication Number: OFR5311 Scale:     Date: 1981

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

Publisher Name: Ontario Geological Survey


MonoMap - Radioactive mineral deposits of the Pembroke-Renfrew area

Publication Number: MDC023 Scale:     Date: 1981

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

Publisher Name: Ontario Geological Survey


Map - Geological series, Clontarf area, Renfrew County, southern Ontario

Publication Number: P1560 Scale: 1:15,840    Date: 1978

Author: Themistocleous S.G.

Publisher Name: Ontario Geological Survey


Map - Clontarf, Renfrew County

Publication Number: M2433 Scale: 1:31,680    Date: 1980

Author: Themistocleous S.G.

Publisher Name: Ontario Geological Survey


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