Ontario Geological Survey
Permanent Link to this Record:
MDI000000001265
| 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 |
Primary Commodities: Rare Earth Elements, Uranium, Thorium
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
1977: Ontario Geological Survey - sampling, and analysis
Province: Grenville
Subprovince: Central Metasedimentary Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Quartz Monzonite | 2 | Contains | ||
| Sandstone | 3 | Arenite | Gneissic | Contains |
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.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Allanite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 4 | Pyrrhotite | Economic | Ore | ||||
| 5 | Thorite | Economic | Ore | ||||
| 6 | Uranothorite | Economic | Ore |
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.
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
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