Ontario Geological Survey
Permanent Link to this Record:
MDI31C13SE00099
| Record Name(s) | Macassa - 1981 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1981-Aug-11 |
| Date Last Modified | 2022-Mar-02 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Copper
Secondary Commodities: Zinc, Cobalt, Gold, Silver
Township or Area: Limerick
Latitude: 44° 52' 4.8" Longitude: -77° 43' 21.14"
UTM Zone: 18 Easting: 284929.64 Northing: 4971893.32 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C13SE
Point Location Description: General
Location Method: Conversion from MDI
Access Description: The location is approximately 2.3 km southeast of the village of Ormsby. An overgrown bush road provides vehicle access from Hwy 62, passing through a stripped area on the mineralized zone about 1.3 km west of the highway.
1961-1962: Macassa Gold Mines Ltd. discovered Cu-Ni mineralization as a result of an electromagnetic survey of an aeromagnetic high in 1961. Late 1961: an access road was constructed to the site. Mid-1962: 23 diamond drill holes had been completed for a total of 4,157 m. 1970: On Dec. 31, 1970, Macassa Gold Mines Ltd. was acquired by Willroy Mines Ltd. 1973: Willroy Mines Ltd. stripped portions of the mineralized zone. 1961-1973: In addition to the above work, geological, magnetometer and Ronka surveys, and a detailed feasibility study including metallurgical testing and engineering studies were completed. A total of 14,722 m of diamond drilling were completed. This figure includes the 23 holes drilled in mid-1962.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 31C13SE-11 | 31C13SE0003 | 31C13SE0003 |
| Rock Type | Rank | Composition | Texture | Relationship | Pyroxenite | 1 | Pyroxenite | Host |
|---|---|---|---|---|
| Gabbro | 2 | Gabbro | Near | |
| Mafic lava flow-unsubdivided | 3 | Basalt | Near |
Feb 15, 2019 (Sheree Hinz) - Deposit occurs in metapyroxenite near its contact with the gabbro.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Cubanite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pentlandite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 5 | Pyrrhotite | Economic | Ore | ||||
| 6 | Sphalerite | Economic | Ore |
Feb 15, 2019 (Sheree Hinz) - Mineralization consists of erratically disseminated pyrrhotite, pentlandite, chalcopyrite, and pyrite contained within a band of metapyroxenite in a mafic intrusion. The mineralized zone forms a reverse L shape, with an aggregate length of about 320m, and varies in width from less than 4m to 34m, averaging approximately 17m. The mineralized zone narrows down and pinches out to the north. Long Lac Minerals reported in 1970 that the North Zone had a resource of 3.9Mt at 0.83% Ni, 0.25% Cu and 0.054% Co and the South Zone had a reported resource of 4.7Mt at 0.21% Ni and 0.11% Cu.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| South Zone | 1970 | Unclassified | 4700000 | Copper 0.11 Percent, Nickel 0.21 Percent | ||
| North Zone | 1970 | Unclassified | 3900000 | Cobalt 0.054 Percent, Copper 0.25 Percent, Nickel 0.83 Percent |
MonoMap - Geology of Limerick and Tudor townships, Hastings County
Publication Number: R067 Page: 70-75 Date: 1969
Author: Lumbers S.B.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Copper, nickel, lead and zinc deposits of Ontario
Publication Number: MDC012 Page: 138 Date: 1969
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Metallogeny of the Grenville Province, southeastern Ontario
Publication Number: OFR5515 Page: 305-312, 82 Date: 1984
Author: Carter T.R.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Base metal, molybdenum and precious metal deposits of the Madoc-Sharbot Lake area, southeastern Ontario
Publication Number: OFR5548 Page: 78-83 Date: 1985
Author: Malczak J., Carter T.R., Springer J.S.
Publisher Name: Ontario Geological Survey
Location:
Mono - Mafic-Ultramafic Intrusions, Base-Metal Sulphides, and Platinum Group Element Potential of the Grenville Province in Southeastern Ontario
Publication Number: OFR5880 Page: 96-97 Date: 1994
Author: Wilson G.C.
Publisher Name: Ontario Geological Survey
Location:
Mono - Report of Activities 2002, Resident Geologist Program, Southern Ontario Regional Resident Geologist Report: Southeastern and Southwestern Districts, Mines and Minerals Information Centre, and Petroleum Resources Centre
Publication Number: OFR6115 Page: 8-9 Date: 2003
Author: Sangster P.J., McGuinty W.J., Papertzian V.C., Steele K.G., Lee C.R., Barua M., Laidlaw D.A., Carter T.R.
Publisher Name: Ontario Geological Survey
Location:
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