Ontario Geological Survey
Permanent Link to this Record:
MDI000000003212
| Record Name(s) | Lockerby East - 1991 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 2022-Oct-19 |
| Date Last Modified | 2022-Oct-21 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Copper
Secondary Commodities: Cobalt
Township or Area: Denison, Graham
Latitude: 46° 26' 23.92" Longitude: -81° 18' 27.42"
UTM Zone: 17 Easting: 476370 Northing: 5142980 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 41I06NW
Point Location Description: Map on SPC Nickel website
Location Method: Data Compilation
The Lockerby East zone was mined starting in 1991-1992 by Falconbridge Ltd. There is an access drift from the Lockerby Shaft #1 to the LKE zone. 2005: First Nickel Inc. acquired the property. 2006-12, First Nickel drilled 94 DDH totalling 15,128 m. 2016: In January, Transition Metals acquired the assets of First Nickel. In May, SPC Nickel acquired 70% interest in the property from Transition Metals Corp. 2021: SPC Nickel acquired the remaining 30% interest in the property from Landore, giving SPC 100% interest in the property.
Province: Southern
Supergroup: Sudbury Igneous Complex, Main Mass
Oct 19, 2022 (Therese Pettigrew) - The Lockerby East Property (LKE) is situated in the southwest portion of the Sudbury Igneous Complex (SIC) and straddles the contact between the Proterozoic aged Huronian Supergroup rocks to the south and the crystalline igneous rock of the SIC to the north. Locally the footwall rocks are dominated by mafic volcanics of the Elsie Mountain Fm. and granitic rocks of the Creighton Pluton. Localized zones of Sudbury Breccia occur throughout the footwall rocks. Three zones have been mined at the Lockerby Mine including the Lockerby Main (LKM), Lockerby Depth (LKD), and Lockerby East (LKE) deposits (Vicker, 2009).
| Rock Type | Rank | Composition | Texture | Relationship | Breccia-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Norite | 2 | Host | ||
| Granite | 3 | Footwall |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrrhotite | Economic | Ore | ||||
| 2 | Pentlandite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 5 | Sphalerite | Economic | Ore | ||||
| 6 | Cobaltite | Economic | Ore | ||||
| 7 | Gersdorffite | Economic | Ore |
Oct 19, 2022 (Therese Pettigrew) - Ni-Cu-PGM mineralization on the Lockerby East Property is directly associated with the basal contact of the SIC and is hosted within a discontinuous inclusion-bearing noritic unit called the Sublayer. The Lockerby East (LKE) zone is located 1.5 km east of the Lockerby Depth (LKD) zone at shallower depths than the LKD zone. The LKE zone averages one metre to two metres thick and strikes for almost 200 m. FL mined the LKE zone above the 2,900 m RL (1,055 m depth) on five sublevels to the 30 Level undercut. LKE zone mineralization is shear hosted and controlled by a nose structure of norite/sublayer in the footwall that plunges from west to east at 40º. It dips 70 degrees or steeper south at the 34 Level; however, sparse drilling below the 40 Level indicates that the contact and the mineralized zone may reverse dip to steeply north. The up-plunge area is characterized by a roll to shallower dip and the occurrence of parallel sheets of Ni-Cu mineralization on the up plunge Conwest Deposit on the West Graham property. In the LKE zone, pentlandite content in ores is significantly higher than in the LKM-LKD environment, and pyrrhotite content is lower than in the LKD zone, with polished section and microprobe work on six core specimens from one drill hole by Springer and Lalonde (1991 from Clow et al. 2005) indicating 55% pyrrhotite, 25% pentlandite, 10% chalcopyrite and 10% pyrite. Ni content averages approximately 36% in pentlandite, ranges from 0.46% to 1.11% (average 0.7%) in pyrrhotite, and 0.3% to 2% in pyrite. Minor sphalerite (1% by volume), gersdorffite (0.1% to 2%) and cobaltite are present. Pentlandite and pyrite carry from 0.5% to 4.29% weight percent Co (Vicker, 2009). LKE mineralization is predominately contact style, with narrow (less than five metres thick) semi-massive to nearly massive breccia sulphide veins anastomosing proximal to the granite footwall contact locally within a micaceous shear (Darling et al., 2012).
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| East Zone | 2012 | Inferred Mineral Resource | 40000 | 2012 NI 43-101 | 1.5% cutoff | Cobalt 0.06 %, Copper 0.8 %, Nickel 2.9 % |
| East Zone | 2012 | Indicated Mineral Resource | 180000 | 2012 NI 43-101 | 1.0% cutoff | Cobalt 0.048 %, Copper 0.78 %, Nickel 2.32 % |
| Lockerby East | 2009 | Indicated Mineral Resource | 180000 | 2009 NI 43-101 | 1.0% cutoff | Cobalt 0.048 %, Copper 0.78 %, Nickel 2.32 % |
| Lockerby East | 2009 | Inferred Mineral Resource | 40000 | 2009 NI 43-101 | 1.0% cutoff | Cobalt 0.059 %, Copper 0.8 %, Nickel 2.93 % |
| East Zone | 2005 | Measured + Indicated Resource | 45000 | 2012 NI 43-101 | Cobalt 0.03 %, Copper 0.98 %, Nickel 2.16 % | |
| East Zone | 2005 | Inferred Mineral Resource | 226000 | 2012 NI 43-101 | Cobalt 0.01 %, Copper 0.91 %, Nickel 2.14 % |
Publication - Technical Report on the 2009 Resource Estimate for the Depth, East and Upper West Zones, Lockerby Mine, Sudbury, Ontario
Publication Number: 2009 NI 43-101 Date: 2009
Author: Vicker, P.A.
Publisher Name: First Nickel Inc.
Location: SEDAR
Publication - Lockerby Mine Project NI 43-101 Technical Report
Publication Number: 2012 NI 43-101 Date: 2012
Author: Darling, G., Fuchs, J., Moore, C.
Publisher Name: Stantec for First Nickel Inc.
Location: SEDAR
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