Ontario Geological Survey
Permanent Link to this Record:
MDI000000000129
| Record Name(s) | Lower Coleman - 2006 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 2006-Aug-08 |
| Date Last Modified | 2024-Feb-07 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Platinum Metals
Secondary Commodities: Copper
Township or Area: Levack
Latitude: 46° 40' 19.2" Longitude: -81° 20' 3.46"
UTM Zone: 17 Easting: 474430 Northing: 5168770.01 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 41I11NW
Point Location Description: Location taken from GSC Open File 4570. Point location indicated ore body at surface.
Location Method: Other
Access Description: The Lower Coleman Mine is accessed through the #1 Shaft of the Coleman Mine. The Coleman Mine is accessed by the Coleman Mine Road from Levack, Ontario.
Inco identified the Lower Coleman Deposit through drilling in 1964. Several feasibility studies were undertaken in the late 1960’, 1970’s and early 1980’s. The deposit size and shape was constrained by subsurface drilling from Falconbridge’s Strathcona Mine (2750’ Level) in the late 1980’s. Mine development from Inco’s Coleman Mine began in 1990.
Province: Superior
Subprovince: Sudbury Structure
Supergroup: Sudbury Igneous Complex, Main Mass
Geological Age: Paleoproterozoic Geochronological Age: 1.85Ga
Aug 13, 2015 (L Hall) - The Lower Coleman Mine is a SIC Contact deposit hosted by Sublayer Breccia and Footwall Breccia in contact with Archean Levack Gneiss in the North Range of the Sudbury Structure.
| Rock Type | Rank | Composition | Texture | Relationship | Norite | 1 | Sublayer | Breccia | Host |
|---|---|---|---|---|
| Breccia-unsubdivided | 1 | Footwall Breccia | Host | |
| Gneiss-Unsubdivided | 2 | Levack Gneiss | Footwall |
Aug 13, 2015 (L Hall) - Sublayer Breccia is a fragmental rock with an igneous textured noritic groundmass bearing inclusions of mafic and ultramafic character of contentious origin. The Footwall Breccia has an igneous groundmass; however it is more felsic tending towards granitic composition. The inclusions in Footwall Breccia are derived from the footwall rocks, in this case primarily Levack Gneiss.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pentlandite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore |
Aug 13, 2015 (L Hall) - Massive to disseminated sulphide mineralization occurs within, and locally completely replacing the igneous groundmass of the Footwall Breccia and Sublayer Breccia. Pyrrhotite, pentlandite, chalcopyrite and pyrite are the dominant sulphide minerals.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Lower Coleman | 1990 | Indicated Mineral Resource | 5500000 | Northern Miner article |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 2014 | 1385000 | Vale Press Release | Combined production for Coleman Mine, Lower Coleman Mine and McCreedy East Mine | |
| 2013 | 1515000 | Vale Press Release | Combined production for Coleman Mine, Lower Coleman Mine and McCreedy East Mine | |
| 2012 | 1062000 | Vale Press Release | Combined production for Coleman Mine, Lower Coleman Mine and McCreedy East Mine |
Map - Geology, Sudbury bedrock compilation, Ontario
Publication Number: OF 4570 Scale: 1:50,000 Date: 2005
Author: Ames, D.E.; Davidson, A; Buckle, J.L.; Card, K.D.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/221501
Publication - Magmatic ore deposits of the Sudbury Igneous Complex; Institute on Lake Superior Geology 43rd Annual Meeting; Field Trip Guidebook.
Publication Number: ILSG 43:5 Date: 1997
Author: Prevec, S.A
Publisher Name: Institute of Lake Superior Geology
Location:
Map - Geological series, Precambrian geology of Levack Township, Sudbury District
Publication Number: P2428 Scale: 1:15,840 Date: 1981
Author: Dressler B.O.
Publisher Name: Ontario Geological Survey
Location:
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