Ontario Geological Survey
Permanent Link to this Record:
MDI42C02NE00106
| Record Name(s) | Central Brooks Iron Range - 1912, Brooks No. 2 Iron Range - 1912 |
|---|---|
| Related Record Type | Compound |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Jul-23 |
| Date Last Modified | 2022-Sep-06 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Corbiere
Latitude: 48° 8' 47.15" Longitude: -84° 36' 18.69"
UTM Zone: 16 Easting: 678130.24 Northing: 5335349.1 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C02NE
Point Location Description: Occurrence 7 map P.2607
Location Method: Conversion from MDI
Access Description: The iron range is located in central Corbiere Township. It forms a ridge up to 250 feet high that decreases in height eastwartd to approximately 15 ft above local lake level. It can be accessed by a 6 km overland traverse from the junction of the railway line and the Hawk Junction road. The iron range is more easily accessible by float plane or helicopter from Wawa.
In 1912, E. L. Goodwin reported that Lake Superior Corporation (future Algoma Steel Corporation Limited) compled 14 trenches and identified two small siderite bodies. In 1949, the Jalore Mining Company Limited completed 10 short diamond drill holes (570.5 feet). No additional work has been completed.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| CORBIERE0025ACR | ||
| 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 Central Brooks Iron Range is part of the Michipicoten Iron Range that occurs between the cycle one intermediate to felsic metavolcanic rocks and the overlying cycle two mafic metavolcanic rocks of the Michipicoten Greenstone Belt. North of the range, the rocks consist of sericite schist and intermediate to felsic tuffs. South of the range, the rocks consist of intermediate to mafic massive and pillowed metavolcanic rocks. The range is subvertically dipping and cut off to the east by the Marsden Fault. To the west, the iron range pinches out at an unnamed lake. The range is estimated to be over 5,000 feet in strike length and averages 200 feet in width.
| Rock Type | Rank | Composition | Texture | Relationship | Siderite Ironstone | 1 | Siderite | Host |
|---|---|---|---|---|
| Mafic lava flow-unsubdivided | 2 | Hanging Wall | ||
| Intermediate lava flow-unsubdivided | 3 | Footwall |
Dec 07, 2005 (A Wilson) - The iron formation has been described as massive to brecciated silica with minor amounts of magnetite, pyrite and siderite. Local areas of siliceous siderite are found along the north side of the iron range and within the iron formation. The Central Brooks Iron Range is interpreted to be the in-folded extension of the Josephine-Bartlett Iron Range which became detached during the formation of the Centre Anticline. Siliceous siderite has been observed on the north side of the iron range, and cherty iron formation to the south.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Siderite | Economic | Ore | ||||
| 1 | Pyrite | Economic | Gangue | ||||
| 2 | Magnetite | Economic | Gangue |
| Rank | Classification |
|---|---|
| 1 | Sedimentary |
| Rank | Characteristic |
|---|---|
| 1 | Breccia |
| 2 | Layered |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 1524 | 61 | 280 | 75 | 2750 MA | OFR 5888, P.54 |
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: 149 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: 254-256 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 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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