Ontario Geological Survey
Permanent Link to this Record:
MDI42C02NE00125
| Record Name(s) | East Brooks Iron Range - 1912, Brooks No. 1 - 1912 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 1991-Jan-08 |
| Date Last Modified | 2022-Oct-20 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Corbiere
Latitude: 48° 8' 21.15" Longitude: -84° 34' 32.69"
UTM Zone: 16 Easting: 680345.41 Northing: 5334615.14 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C02NE
Point Location Description: Occurrence 8 map P.2607
Location Method: Conversion from MDI
Access Description: The iron range is located approximately 3 km NNW of Mosquito Lake. It can be accessed via an overland traverse from the end of the bush road leading north over the railway tracks out of the community of Hawk Junction.
1912: Mapping by E. L. Goodwin for the Lake Superior Corporation (Algoma Steel Corporation Ltd.). The range is subdivided into three sections No. 1, No. 2 and No. 3. East Brooks Iron Range is equivalent to Goodwin's No. 1. Trenching of the iron range completed in 21 locations. 1950: Jalore Mining Company Limited completed a program of mapping, sampling and diamond drilling ( 18 holes - 7850.5 ft). Unit subdivided into Section A and Section B. Some anomalous copper values were reported from the drill core.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Corbiere-0025 | 42C02NE8839 | 42C02NE8839 |
| WP Corbiere-1 | 42C02NE0009 | 42C02NE0009 |
| Corbiere-0026 | 42C02NE0951 | 42C02NE0951 |
| Corbiere-0010 | 42C02NE0519 | 42C02NE0519 |
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 East Brooks Iron Range is one of the 32 separate iron ranges that constitute the Michipicoten Iron Formation. It consitutes the break between cycle one and cycle two volcanism. To the south lie intermedicate to felsic quartz-feldspar crystal tuffs, sericite schists, feldspar crystal tuffs and bedded tuffs interbedded with intermediate to mafic schists, flows and tuffs. North of the iron range lies a thick sequence of massive and pillowed intermediate to mafic metavolcanic rocks.
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Chert-Siderite | Host |
|---|---|---|---|---|
| Mafic Schist | 2 | Schist | Footwall | |
| Intermediate Tuff | 3 | Tuff | Footwall | |
| Mafic lava flow-unsubdivided | 4 | Pillowed To Massive | Hanging Wall |
Dec 07, 2005 (A Wilson) - The iron formation consists of massive to banded chert along the north side with a siderite-pyrite zone along the south side. The siderite-pyrite zone is highly variable in width along strike and locally pinches out. Rocks enclosing the iron range are schistose and carbonated. The chloritoid that is commonly observed elsewhere in the township is not present near the East Brooks Range.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Siderite | Economic | Ore | ||||
| Carbonate | Alteration | Carbonatization | 1 | Strong | Replacement |
Dec 07, 2005 (A Wilson) - Anomalous copper values were reported in a spectrographic report filed by the Jalore Mining Company. Exact concentrations of copper were not reported.
| Rank | Classification |
|---|---|
| 1 | Sedimentary |
| Rank | Characteristic |
|---|---|
| 1 | Concordant |
| 2 | Stratiform |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 635 | 15 | 270 | 85 | 2750 MA | OFR 5888 |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 250 | 15 | 270 | 85 | 2750 MA | OFR 5888 |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Section B East Brooks | 1950 | Recoverable | 345625 | OFR 5587 P. 259 | Iron 28.8 NA, Silica Sand 24.6 NA, Sulphur/Pyrite 8.78 NA | |
| Section A East Brooks | 1950 | Unclassified | 1494363 | OFR 5587 P.259 | Iron 28.8 NA, Silica Sand 24.6 NA, Sulphur/Pyrite 8.78 NA |
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: 150 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: 256-257 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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