Ontario Geological Survey
Permanent Link to this Record:
MDI42L10NW00011
| Record Name(s) | Anaconda Iron Property - 1957 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Jan-23 |
| Date Last Modified | 2022-Jul-20 |
| Created By | |
| Revised By |
Primary Commodities: Iron
Township or Area: Durer Lake Area
Latitude: 50° 40' 20.03" Longitude: -86° 47' 1.05"
UTM Zone: 16 Easting: 515289.65 Northing: 5613399.05 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42L10NW
Point Location Description: area of drill collars
Location Method: Based on Assessment
1957-61: Anaconda (Co.) Canada Ltd. – DD-5-2327.5. 1955: Technical Managers Inc. – ground geophysics
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 25 | 42L10NW0047 | 42L10NW0047 |
| 10 | 42L10NE0004 | 42L10NE0004 |
| 63.622 | 42L10NW0020 | 42L10NW0020 |
Province: Superior
Subprovince: English River
Terrane: English River Basins
Belt: Melchett Lake
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Oxide Ironstone | 1 | Oxide-Facies | Is |
|---|---|---|---|---|
| Sandstone | 2 | Greywacke | Adjacent | |
| Pegmatite | 3 | Muscovite-Biotite-Quartz-Feldspar | Intrudes |
Aug 18, 2014 (A Wilson) - The iron formation is of the oxide facies of the Algoma type. Bands of magnetite and quartz with thicknesses ranging from one eighth inch to almost a foot alternate with bands of quartzite and greywacke. Accessory minerals include amphibole, pyroxene, feldspar and chlorite. Minor amounts of specular hematite are found in the Briarcliffe Lake area, but it is rare east of that point. The iron formation is cut by muscovite-biotite-quartz-feldspar pegmatites. Two bands of iron formation, one of low grade and not economically important, and a younger, more continuous band are found on the property. They strike east and dip steeply north. The two bands are separated by about 2,000 feet of metagreywacke (biotite-quartz-feldspar schist). The younger band is composed of a basal, low-grade unit 100-400 feet thick and an upper, higher-grade unit which forms the economically important material. The combined thickness of the two bands is a maximum of 500 feet in the vicinity of the Briarcliffe Lake zone. The bands dip vertically to steeply north and are isoclinally folded about an east-trending axis to form an anticline plunging up to 60°E in the western part of the fold and flattening to 5-20°N at the eastern end. The axial plane of the main fold is vertical in the western part of the area, but flattens toward the east where dips as low as 20 degrees are recorded. The flattening of the fold axis to the east caused the nose of the fold to be downfaulted to its present position at Two Mile Lake. The northern limb of this major fold has a Z-shaped drag fold at Briarcliffe Lake.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Magnetite | Economic | Ore |
| Rank | Characteristic |
|---|---|
| 1 | Stratiform |
Map - Compilation series, Ogoki Lake sheet, Thunder Bay and Cochrane districts
Publication Number: P0274 Scale: 1:126,720 Date: 1997
Author: Stott G.M., McConnell C.D., Mason J.K.
Publisher Name: Ontario Geological Survey
Location:
Mono - Operation Fort Hope
Publication Number: MP042 Page: 22, 51-54 Date: 1970
Author: Thurston P.C., Carter M.W.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 445 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
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