Ontario Geological Survey
Permanent Link to this Record:
MDI52B13SE00003
| Record Name(s) | Canadian Charleson - 1955, Rawn Iron - 1952 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine With Reserves or Resources |
| Date Created | 1979-Jun-19 |
| Date Last Modified | 2022-Mar-31 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Freeborn
Latitude: 48° 46' 33.6" Longitude: -91° 38' 1.02"
UTM Zone: 15 Easting: 600386.77 Northing: 5403455.56 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52B13SE
Point Location Description: Between Inland Lake and south end of East Arm, on site of present Atikokan Airfield.
Location Method: Conversion from MDI
Access Description: Access via Steep Rock Lake road NW of Atikokan.
1954: Charleson Mining bank sampled 8 gravel pits and sunk a 27 m shaft. 1955-8: Canadian Charleson was incorporated and carried out diamond drilling, auger drilling, and plant construction, 1958-64: Open pit mining during the spring, summer, and fall seasons by Canadian Charleson. No assessment reports were found on file.
Province: Superior
Geological Age: Cenozoic
| Rock Type | Rank | Composition | Texture | Relationship | Sand | 1 | Is |
|---|---|---|---|---|
| Gravel | 2 | Is | ||
| Mafic lava flow-unsubdivided | 3 | Near |
Jun 21, 2018 (Therese Pettigrew) - Iron-bearing sand and gravel occur over an area 2895 m long and 1220 m long, trending SW, immediately south of the East Arm. There are accumulations of sediments up to 75 m thick. They overlie an uneven topographic surface and form undulating hills with a local maximum relief of 45 m. For most of their length, the sand and gravel deposits lie between bedrock ridges especially on the northwest and southeast boundaries. The deposits are stratified with bedding ranging from very thin to thick, are both discontinuous and continuous, and are horizontal or inclined. Cross-laminations, current ripple marks, and imbricated and graded bedding were noted. Current-direction measurements indicate flow was from the NE to the SW. In addition to fragments of common rock types, goethite-hematite fragments are common and pyrolusite ones are rare. The deposit is regarded as a kame terrace formed by torrential meltwater streams, localized by topography and stationary ice, entering a standing body of water during glacial recession (Shklanka and McIntosh, 1972). The sands and gravels are underlain by mafic metavolcanics.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Goethite | Economic | Ore | ||||
| 2 | Hematite | Economic | Ore |
Jun 21, 2018 (Therese Pettigrew) - NE-trending zone up to 1067 m wide, 2591 m long, and 76 m deep of goethite-hematite-bearing Pleistocene sands and gravels (Shklanka, 1968). Mining was selective, with only the higher-grade portions of the deposit being worked. When these were exhausted, operations ceased (Shklana, 1972). The percentage of iron id dependent upon the grain size, being 1-6% Fe in the silt-size particles and 9-30% in the gravel-size grains. The grade of the ore mined was 12-20% and the concentrate was from 54.8-56.3% natural FE, 57.4-58.5% total FE, 5.09-6.25% SiO2, 1.08-1.17Al2O3, 0.49-0.64% Mn, 0.030% P, 0.18% CaO, 0.36% MgO, and 0.015% S (Thunder Bay RGP mineral deposit files).
| Rank | Classification |
|---|---|
| 1 | Placer |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Canadian Charleson | 1964 | Unclassified | 40600000 | Thunder Bay RGP mineral deposit files | Post-development Reserves: 40.6 million tons | |
| Canadian Charleson | 1958 | Unclassified | 46000000 | Shlanka R, 1972. OGS GR93, p63 | Pre Development Reserves: 46 million tons @ 16% FE for 7,680,000 tons | Iron 16 Percent |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1965 | 6700000 |
Iron 780000 Tons (short) |
Shlanka R, 1972. OGS GR93, p63 | 1958-1965: 6.7 million tons @ 12% for 780,000 tons of Fe ore concentrate. |
| 1964 | 1553325 |
Iron 195645 Tonnes |
Thunder Bay RGP mineral deposit files | 1,528,793 long tons for 195,645 long tons of concentrate at 55.32% Fe |
| 1962 | 1386849 |
Iron 165012 Tonnes |
Thunder Bay RGP mineral deposit files | 1,364,946 long tons for 165,012 long tons of concentrate at 55.13% Fe |
| 1960 | 1375825 |
Iron 128362 Tonnes |
Thunder Bay RGP mineral deposit files | 1,354,096 long tons for 128,362 long tons of concentrate at 55.19% Fe |
| 1959 | 1612636 |
Iron 157925 Tonnes |
Thunder Bay RGP mineral deposit files | 1,587,167 long tons for 157,925 long tons of concentrate |
| 1958 | 533377 |
Iron 68560 Tonnes |
Thunder Bay RGP mineral deposit files | 524,953 long tons for 68,560 long tons of concentrate |
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 296 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the Steep Rock Lake Area, District of Rainy River
Publication Number: R093 Page: 23-24, 59-64 Date: 1972
Author: Shklanka R., McIntosh J.R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
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