Ontario Geological Survey
Permanent Link to this Record:
MDI42C02NE00127
| Record Name(s) | Reau-Mary Lakes Iron Range - 1953, Candela Development Company - 1954 |
|---|---|
| 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° 11' 23.38" Longitude: -84° 36' 55.46"
UTM Zone: 16 Easting: 677220.83 Northing: 5340148.59 UTM Datum: NAD83
Resident Geologist District: Sault Ste. Marie
NTS Grid: 42C02NE
Point Location Description: Occurrence 1 map P.2607
Location Method: Conversion from MDI
Access Description: The only exposure of this iron range is on an island in the middle of Reau Lake near the north township boundary.
1953: mapping by Jalore Mining company Limited; 7 ddh (456.4 ft). 1954: Candela Development Company Ltd.- self-potential survey, 8 ddh (2092.1 ft.).
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Menzies 0011-A1 | 42C02NW0055 | 42C02NW0055 |
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) - This iron range has no topographic expression. It lies at the contact between the intermediate to felsic metavolcanic rocks of cycle one with overlying intermediate to mafic metavolcanics of cycle two. The southwest end of the Reau-Mary Lakes Iron Range likely coreelates with the north end of the Cline Lake iron range. The iron range consists of a series of blocks or lenses of Michipicoten-type iron formation. It appears as though the stratigraphy is north facing, although some south facing data has been locally obtained.
| Rock Type | Rank | Composition | Texture | Relationship | Siderite Ironstone | 1 | Siderite | Host |
|---|---|---|---|---|
| Mafic pillowed flow | 2 | Pillowed | Hanging Wall | |
| Intermediate Tuff | 3 | Tuff | Footwall |
Dec 07, 2005 (A Wilson) - The hanging wall mafic to intermedicate metavolcanics are sheared, pillowed and strongly carbonate altered. The foot wall intermediate to felsic metavolcanics are sheared and massive in the vicinity of Reau Lake. On Mary lake, the rokcs consist of schistose massive flows, lapilli tuff, feldspar crystal tuff and volcanic breccia. Sericite schists, in part sheared tuffs, are also present. Chloritoid alteration is pervasive on the south side of Reau Lake. These rocks appear to mark the northern limit of the chloritoid alteration. The iron formation observed in the middle of Reau Lake is deeply weathered siderite with disseminated pyrite. Some pyrite is concretionary.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Siderite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| Ankerite | Alteration | Carbonatization | 1 | Strong | Replacement |
Dec 07, 2005 (A Wilson) - Chloritoid porphyroblasts occur in rocks of both felsic and mafic composition on the south shore of Reau Lake. These chloritoid bearing rocks appear to mark the northern limit of a broad zone of chloritoid alteration throughout NE Corbiere Township.
| Rank | Classification |
|---|---|
| 1 | Sedimentary |
| Rank | Characteristic |
|---|---|
| 1 | Concordant |
| 2 | Stratiform |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Regular | 90 | 9 | 45 | 85 | 2750 MA | OFR 5888 |
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 - Pyrite deposits of Ontario
Publication Number: MDC005 Page: 30 Date: 1967
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Wawa mineral deposits data base
Publication Number: OFR5775 Page: 153 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: 278-280 Date: 1993
Author: Sage R.P.
Publisher Name: Ontario Geological Survey
Location:
Mono - Iron deposits of Ontario
Publication Number: MDC011 Page: 58-59 Date: 1968
Author: Shklanka R.
Publisher Name: Ontario Dept. of Mines
Location:
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