Ontario Geological Survey
Permanent Link to this Record:
MDI42C02NE00129
| Record Name(s) | West Brooks Iron Range - 1991, Brooks No. 3 Iron Range - 1926 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-08 |
| Date Last Modified | 2022-Sep-12 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Corbiere
Latitude: 48° 8' 58.71" Longitude: -84° 37' 48.64"
UTM Zone: 16 Easting: 676260.7 Northing: 5335648.61 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C02NE
Point Location Description: Occurrence 6 map P.2607
Location Method: Conversion from MDI
Access Description: The iron range is located in central Corbiere Township and is best accessed by air from Wawa and landing on Andre Lake. The iron range is accessed by a 1 km traverse north-northwest of the north end of Andre Lake.
Pre-1912 discovery by prospectors working for Lake Superior Corporation. 1949-1951: Jalore Mining Company Limited-mapping, 12 ddh (1457 feet).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Corbiere-0022 | 42C02NE0013 | 42C02NE0013 |
| Corbiere-0011 | 42C02NE0017 | 42C02NE0017 |
| Menzies 0011-A1 | 42C02NW0055 | 42C02NW0055 |
| Corbiere-0025 | 42C02NE8839 | 42C02NE8839 |
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Michipicoten
Tectonic Assemblage: Wawa
Geological Age: Neoarchean Geochronological Age: 2750 MA Geochron. Age Ref.: OFR 5888
Dec 07, 2005 (A Wilson) - The iron range is part of the Michipicoten Iron Formation. It lies at the contact of intermediate to felsic metavolcanic rocks of cycle one and intermediate to mafic metavolcanic rocks of cycle two. The range occurs on the south limb of the Centre Anticline and has likely undergone considerabel deformation during folding and possible overturning.
| Rock Type | Rank | Composition | Texture | Relationship | Carbonate Ironstone | 1 | Carbonate | Host |
|---|---|---|---|---|
| Intermediate Tuff | 2 | Tuff, Massive | Hanging Wall | |
| Intermediate Tuff | 3 | Intermediate To Felsic | Tuff And Schist | Footwall |
Dec 07, 2005 (A Wilson) - On the north side intermediate to felsic rocks are present consisting of breccia with chloritic matrix, sericite schist, lapilli tuff, tuff and quartz-feldspar crystal tuff. On the south side, the rocks are massive to pillowed intermediate to mafic metavolcnaci rocks. Facing data indicate that the stratigraphy is south-facing. The iron formation has been described as fine-grained, interedded, white and grey silica and siliceous buff coloured siderite. Siderite and pyrite occur in bands 1 inch to 2 feet in width.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Siderite | Economic | Ore | ||||
| 1 | Pyrargyrite | Economic | Gangue | ||||
| Calaverite | Alteration | Carbonatization | 1 | Strong | Replacement | ||
| Chloritoid | Alteration | Chloritic | 2 | Medium | Replacement |
Dec 07, 2005 (A Wilson) - Carbonate alteration is intense, particularly in those areas where the rocks are schistose. In some locations to the west of the iron range, chloritoid porphyroblasts are common in rocks of both mafic and felsic composition.
| Rank | Classification |
|---|---|
| 1 | Sedimentary |
| Rank | Characteristic |
|---|---|
| 2 | Breccia |
| 1 | Concordant |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 914 | 30 | 120 | 85 | 2750 MA | OFR 5888 |
Map - Michipicoten area, compilation sheet, District of Algoma
Publication Number: P0184 Scale: 1:126,720 Date: 1997
Author: Goodwin A.M.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geological series, Precambrian geology, Corbiere Township, Algoma District
Publication Number: P2607 Scale: 1:15,840 Date: 1984
Author: Sage R.P., Calvert T., Epstein R., England D., Koscinsko K., Worona R., Oudkerk G., Inasi J., Lockwood M.B., Thomas D.
Publisher Name: Ontario Geological Survey
Location:
Folio - Corbiere Township, District of Algoma
Publication Number: GDIF297 Date: 1997
Author: Sault Ste Marie RGO
Publisher Name: Ontario Geological Survey
Location:
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 55-56 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Wawa mineral deposits data base
Publication Number: OFR5775 Page: 154 Date: 1991
Author: Frey E.D., Stewart R.C.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of Abotossaway, Corbiere, Leclaire and Musquash Townships and Part of Dunphy Township, District of Algoma
Publication Number: OFR5587 Page: 284-286 Date: 1993
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Publication - Michipicoten Iron Ranges; Geological Survey of Canada, Memoir 147
Publication Number: GSC Memoir 147 Page: 93-94 Date: 1926
Author: Collins, W H; Quirke, T T; Thomson, E
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100849
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