Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001259

Record: MDI000000001259

General

Mineral Record Identification
Record Name(s) OGS Sample T-561 - 1977, Grattan Township Occurrences - 1977, Lake Clear Occurrences - 2001
Related Record Type
Record Status Occurrence
Date Created 2011-Jun-01
Date Last Modified 2022-Jan-05
Created By A Wilson
Revised By A Wilson

Commodities

Primary Commodities: Thorium

Secondary Commodities: Uranium



Location

Township or Area: Grattan

Latitude: 45° 27' 24.94"    Longitude: -77° 4' 57.48"

UTM Zone: 18    Easting: 337166.999   Northing: 5035820.996    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 Granite Host
Syenite 2 Porphyritic Contains
Quartz Monzonite 3 Gneissic Contains

Lithology Comments

Jun 10, 2011 (A Wilson) - The showing occurs in granitic pegmatite within massive to gneissic syenite and gneissic quartz monzonite. Granitic pegmatite dikes cross cut both facies.




Mineralization

Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style
1UranothoriteEconomicOre

Mineralization Comments

Jun 10, 2011 (A Wilson) - Grab samples collected by Themistocleous returned: 0.01% U3O8, 1.30% K2O, and 0.29% Th.



Mineral Record Details

Classification
RankClassification            
1 Pegmatite
Characteristics
Rank Characteristic            
1 Disseminated

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