Ontario Geological Survey
Permanent Link to this Record:
MDI42D15SW00074
| Record Name(s) | Black Fox Lake Carbonate - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1997-Feb-24 |
| Date Last Modified | 2022-May-17 |
| Created By | |
| Revised By |
Primary Commodities: Sulphur/Pyrite
Township or Area: Tuuri
Latitude: 48° 47' 1.12" Longitude: -86° 50' 58.03"
UTM Zone: 16 Easting: 511059 Northing: 5403416.01 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42D15SW
Point Location Description: Outcrop
Location Method: Field Visit
Access Description: The Black Fox Lake carbonate occurrence is located in Tuuri Township approximately 19 km east of Terrace Bay. The carbonate occurrence is located just north of Highway 17, just south of the southwest end of Black fox Lake.
1984: Geological mapping (thesis project); B.R. Schnieders. Green carbonate and pyrite mineralization was discovered. 1992: Property examination and lithogeochemical sampling; OGS Resident Geologist staff. 1995: Geological mapping, prospecting and sampling; Echo Bay Mines Ltd.
Province: Superior
Subprovince: Wawa
Terrane: Wawa-Abitibi
Belt: Schreiber-Hemlo
Geological Age: Archean
Dec 07, 2005 (D McKay) - The general geology of the area is described by Schnieders et al. (1996) as follows: The geology consists of intercalated metavolcanic rocks and metasedimentary rocks. The metasedimentary rocks consist of graded turbidites with beds up to 25 cm wide. Schnieders (1987) described a sedimentary succession dominated by A- and AB-turbidites, organized into upward (southward) coarsening and thickening, and fining and thinning sequences. These assemblages were thought to represent deposition on suprafan lobes and submarine channels, respectively. The metavolcanic rocks appear to be of intermediate to mafic composition, and possibly amygdaloidal and variolitic. In addition Smyk and Schnieders (1995) have identified spinifex-textured, basltic-komatiite in the Steel River area. Numerous sulphide-facies iron formations are present in the area. Other rock types include felsic and mafic intrusives, lamprophyre and diabase dikes. Schnieders (1987), Williams (1989) and Smyk and Schnieders (1995) have suggested complex folding events, accompanied by large scale faulting in the Steel River area.
| Rock Type | Rank | Composition | Texture | Relationship | Gabbro | 1 | Gabbro | Near |
|---|---|---|---|---|
| Vein | 2 | Quartz-Carbonate | Veins And Stockworks | Host |
Dec 07, 2005 (D McKay) - Schnieders (1987) described the presence of metagabbroic intrusives in the Black Fox Lake area. Deformation within these rocks vary and iron-carbonate alteration is common.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Carbonate | Economic | Gangue | ||||
| 3 | Muscovite | Economic | Gangue | ||||
| Quartz | Alteration | Hydrothermal | 1 | Unknown | Veins | ||
| Carbonate | Alteration | Hydrothermal | 2 | Unknown | Veins | ||
| Muscovite | Alteration | Hydrothermal | 3 | Unknown | Veins |
Dec 07, 2005 (D McKay) - At one exposure near Black Fox Lake, a carbonate-quartz vein system contains sulphides and green muscovite. The quartz-carbonate veins and stockwork are exposed on a small peninsula in Black Fox Lake over an area approximately 10 m by 50 m in size. The veins appear to have a northeast strike and contain ankerite, green carbonate/muscovite and minor pyrite. The rocks display a rusty brown gossan or rind. A similar occurrence of green carbonate was discovered by D. Michano Jr. in the Spider Lake area. Here a quartz-carbonate stockwork was sampled, however, few sulphides were observed in the immediate area (D. Michano Jr. Prospector, personal communication, 1995). Grab samples collected from the occurrence by OGS Resident Geologist staff and prospectors have returned assay values of nil to trace Au.
Dec 07, 2005 (D McKay) - Schnieders (1987) described the presence of metagabbroic intrusives in the Black Fox Lake area. Deformation within these rocks vary and iron-carbonate alteration is common.
Map - Nipigon-Schreiber, geological compilation series, Thunder Bay District
Publication Number: M2232 Scale: 1:253,440 Date: 1973
Author: Carter M.W., McIlwaine W.H., Wisbey P.A.
Publisher Name: Ontario Division of Mines
Location:
Mono - Mineral Occurrences in the Nipigon-Marathon Area, Volumes 1 and 2.
Publication Number: OFR5951 Page: 751-753 Date: 1996
Author: Schnieders B.R., Smyk M.C., Speed A.A., McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
Thesis - Geology of Sulphide-Facies Iron Formations and Associated Rocks in the Lower Steel River - Little Steel Lake Area, Terrace Bay, Ontario Area
Publication Number: MSc thesis Date: 1987
Author: Schnieders, B.R.
Publisher Name: Lakehead University
Location: Thunder Bay RGP
File - Schreiber-Hemlo Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Jackfish-Middleton area, Thunder Bay District
Publication Number: M2107 Date: 1967
Author: Walker J.W.R.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Report of Activities 1994, Resident Geologists
Publication Number: OFR5921 Page: 86 Date: 1995
Author: Baker C.L., Dressler B.O., Laderoute D.G., Newsome J.W.
Publisher Name: Ontario Geological Survey
Location:
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