Ontario Geological Survey
Permanent Link to this Record:
MDI41I10SW00039
| Record Name(s) | Thayer-Lindsley Mine - 1987, Lindsley Mine - 1994, Lindsley Property - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 1987-Nov-05 |
| Date Last Modified | 2023-Aug-03 |
| Created By | |
| Revised By |
Primary Commodities: Nickel, Copper, Platinum Metals
Secondary Commodities: Cobalt, Gold, Silver
Township or Area: Blezard
Latitude: 46° 33' 39.71" Longitude: -80° 59' 30.74"
UTM Zone: 17 Easting: 500623 Northing: 5156385 UTM Datum: NAD83
Resident Geologist District: Sudbury
NTS Grid: 41I10SW
Point Location Description: shaft
Location Method: Data Compilation
1885: staked by J. Stobie. 1937: property acquired by Thayer Lindsley for Falconbridge Ltd. 1941-1956: Falconbridge Nickel Mines Ltd – DD. 1970-74: Falconbridge Nickel Mines Ltd – DD, shaft sinking and construction commenced; plant dismantled and sold in 1971. 1986-88: Falconbridge Ltd. – exploration. 1989-91: Falconbridge Ltd. – exploration shaft collared and completed to depth of 1637 m. 1990-2006: Falconbridge Ltd – in production. 2007-09: Xstrata Nickel – in production; mine placed on care and maintenance at end of 2009. 2010: Xstrata Nickel – mine closed.
Province: Southern
Subprovince: Sudbury Structure
Supergroup: Sudbury Igneous Complex, Main Mass
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Norite | 1 | Norite | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Footwall | ||
| Granite | 3 | Footwall | ||
| Breccia-unsubdivided | 4 | Host |
Jan 14, 2014 (A Wilson) - Sudbury breccia forms and irregular network of 1 mm to 3 m thick veins in granite. They can extend over 100 m in length and 250 m in the footwall. Sublayer is the main host and forms an irregular, up to 60 m thick, sheet along the base of the Sudbury Igneous Complex. It contains sub-rounded fragments, up to 10 m across, of norite, mafic metavolcanics, gabbro, granite and ultramafic rock in a fine grained, quartz rich matrix. South Range norite overlies either the sublayer or footwall rocks. The norite is grey-green due to the alteration of pyroxene to amphibole. Lake mafic dikes and olivine diabase cut all rock types. These dikes occupy northwest trending, brittle deformation zones. The sublayer is an irregular mineralized breccia, within a fine-grained norite matrix and displays a sharp basal contact. The basal contact contains footwall fragments and the hanging wall contact is gradational and dominated by fragments of norite.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore |
Jan 14, 2014 (A Wilson) - The sublayer is an irregular mineralized breccia containing 5-65% sulphides within a fine-grained norite matrix. Footwall mineralization consists of four zones of irregular pods up to 56 m wide and narrow lenses of massive sulphide. Sulphides compose 80-95% of the ore and the remainder is xenoliths of granite, Sudbury breccia, mafic metavolcanics, quartz diorite and amphibolite. The larger zones of footwall ore are associated with Sudbury Breccia while smaller zones occur as veins in granite.
| Rank | Classification |
|---|---|
| 1 | Mafic-Ultramafic Intrusion |
| Rank | Characteristic |
|---|---|
| 1 | Stratiform |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| nose of Murray Granite – footwall mineralization | 1992 | Unclassified | 930000 | OFR5950 | Cobalt 0.124 %, Copper 4.21 %, Gold 1.11 g/t, Nickel 2.23 %, Palladium 7.36 g/t, Platinum 2.86 g/t | |
| Thayer Lindsley Mine - Sublayer Mineralization | 1992 | Unclassified | 6140000 | OFR5950 | Cobalt 0.07 %, Copper 1.34 %, Gold 0.34 g/t, Nickel 1.58 %, Palladium 1.38 g/t, Platinum 1.14 g/t |
Map - Sudbury geological compilation, Sudbury District, Sudbury Regional Municipality
Publication Number: M2491 Scale: 1:50,000 Date: 1984
Author: Dressler B.O.
Publisher Name: Ontario Geological Survey
Location:
Part - Mining operations in 1952
Publication Number: ARV62-02 Page: 97 Date: 1997
Author: Field D.J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Annual report on mineral industry operations in Ontario during calendar year 1970
Publication Number: ARV80 Page: 64 Date: 1998
Author: Matten E.E.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Part - Sudbury nickel field restudied
Publication Number: ARV43-02 Page: 29, 33 Date: 1998
Author: Burrows A.G., Rickaby H.C.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Precambrian Geology of Garson and Blezard Townships
Publication Number: OFR5950 Page: 25-56 Date: 1996
Author: Johns G.W.
Publisher Name: Ontario Geological Survey
Location:
Mono - Proceedings of the Sudbury - Norilsk Symposium
Publication Number: SV05 Page: 91-104 Date: 1994
Author: Lightfoot P.C., Naldrett A.J.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian Geology, Blezard Township
Publication Number: P3341-REV Scale: 1:20,000 Date: 1996
Author: Johns G.W.
Publisher Name: Ontario Geological Survey
Location:
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