Ontario Geological Survey
Permanent Link to this Record:
MDI000000000676
| Record Name(s) | Big Manitou Island Ore Zone - 1956, Manitou Island Complex - 1970 |
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| Related Record Type | |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 2009-Jun-04 |
| Date Last Modified | 2022-Jul-19 |
| Created By | |
| Revised By |
Primary Commodities: Niobium, Uranium
Secondary Commodities: Phosphate
Latitude: 46° 16' 25.42" Longitude: -79° 34' 56.45"
UTM Zone: 17 Easting: 609228.999 Northing: 5125438.004 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 31L04NE, 31L05SE
Point Location Description: approximate centre of cluster of drill holes on plan in 31L05SE9796
Location Method: Data Compilation
1953: Beaucage Mines Ltd. - 40 surface drill holes, mapping, ground geophysics
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| L. NIPIS 18B1 | 31L04NE9767 | 31L04NE9767 |
| L. NIPIS 18A1 | 31L05SE9768 | 31L05SE9768 |
| L. NIPIS 19A1 | 31L05SE9769 | 31L05SE9769 |
| L. NIPIS 20 | 31L05SE9770 | 31L05SE9770 |
| L. NIPIS 21 | 31L05SE9771 | 31L05SE9771 |
| L. NIPIS 14 | 31L05SE9772 | 31L05SE9772 |
| L. NIPIS 15C1 | 31L05SE9796 | 31L05SE9796 |
Province: Grenville
Geological Age: Mesoproterozoic Geochronological Age: 570 Ma Geochron. Age Ref.: Geology of Ontario, Vol 1
| Rock Type | Rank | Composition | Texture | Relationship | Carbonatite-Unsubdivided | 1 | Contains |
|---|---|---|---|---|
| Fenite | 2 | Contains | ||
| Syenite | 3 | Syenite | Host |
Jun 04, 2009 (A Wilson) - The uranian pyrochlore is concentrated in two main rock types: potassic feldspar-sodic pyroxene rock characterized by reddish feldspar and sodic pyroxene rock composed of sodic pyroxene, biotite, calcite and apatite. Fragments of potassic feldspar-sodic pyroxene rock partly replaced by biotite and sodic pyroxene are common in the sodic pyroxene rock, and both rock types are partly replaced by carbonate and contain a few percent magnetite, pyrite and pyrrhotite. Zones rich in uranian pyrochlore cut across the two rock types and the contact between the two types dips steeply outwards from the centre of the complex.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Apatite | Economic | Ore | ||||
| 2 | Pyrochlore | Economic | Ore | ||||
| 3 | Acmite | Economic | Gangue | ||||
| 4 | Calcite | Economic | Gangue | ||||
| 5 | Magnetite | Economic | Gangue |
Jun 04, 2009 (A Wilson) - The diamond drilling completed in 1953 was along a broad zone of radioactivity on the southwest arm of Great Manitou Island. Drilling intersected at least 5 feet of material more than 0.1% U3O8 or 0.40% Nb2O5. These intersections are scattered and do not form a continuous horizon. Twenty, short holes drilled at 50 foot centres at the southern end of the island, intersected at least 27,000 tons of ore grading 0.104% U3O8 , 0.38% Nb2O5 and 10% P2O5. The mineralized rock consists of 20-60% apatite, 20-60% aegirine, 0-20% biotite, magnetite, pyrite and pyrochlore. Pyrochlore is partly replaced by hematite and magnetite and the proportion of Nb to U is lower than in pyrochlore form the Newman Deposit.
| Rank | Classification |
|---|---|
| 1 | Carbonatite |
| Rank | Characteristic |
|---|---|
| 1 | Intrusive |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Great Manitou | 1971 | Unclassified | 24494 | MDC014 p 39, and Assessment report 31L05SE9770 | 27,000 tons lying at the surface on Big Manitou Island which grades 0.381 Nb2O5 , 0.10% U3O8 and about 10% P2O (Assessment report 31L05SE9770) | Niobium 0.38 %, Phosphate 10 %, Uranium .10 % |
MonoMap - Geology of the North Bay area, districts of Nipissing and Parry Sound
Publication Number: R094 Page: 51-52, 83 Date: 1971
Author: Lumbers S.B.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
MonoMap - Columbium (niobium) deposits of Ontario
Publication Number: MDC014 Page: 38-39 Date: 1971
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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