Ontario Geological Survey
Permanent Link to this Record:
MDI42F05SW00018
| Record Name(s) | Sandy Lake Sulphide Occurrence - 1994 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1997-Jan-02 |
| Date Last Modified | 2022-May-18 |
| Created By | |
| Revised By |
Primary Commodities: Sulphur/Pyrite
Secondary Commodities: Copper
Township or Area: Everest Lake Area
Latitude: 49° 18' 16.92" Longitude: -85° 56' 4.42"
UTM Zone: 16 Easting: 577451.678 Northing: 5461874.83 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 42F05SW
Point Location Description: Outcrop near small gravel pit
Location Method: Data Compilation
Access Description: The Sandy Lake sulphide occurrence is located approximately 21.5 km north-northwest of Manitouwadge and 1.25 km northeast of Sandy Lake. The occurrence is accessible via motor vehicle. From Manitouwadge, travel west and then north along the Caramat Industrial Road for approximately 36 km to a point approximately 750 m south of the Middle Falls Road intersection. Sulphide mineralization is reported to occur near a small gravel pit on the east side of the Caramat Industrial Road (Coates 1966, 1968; Breaks and Williams 1990; Resident Geologist's files, Schreiber-Hemlo District, Thunder Bay).
1965: Geological mapping; M.E. Coates (ODM). 1978-1979: Regional lake sediment and water geochemical survey; GSC-MNR. Samples collected from lakes in the vicinity of the occurrence contained slightly anomalous amounts of gold, Cu and Zn. 1989: Geological mapping; H. Williams and F. Breaks (OGS). Dighem airborne geophysical survey (EM, MAG, VLF-EM); Noranda Exploration Company, Limited and Noranda Minerals Inc. (Geco Division). 1991-1992: Reconnaissance till sampling program; GSC. Samples collected in the vicinity of the occurrence contained slightly anomalous amounts of Cu and Ni. One sample, collected approximately 400 m south of the occurrence, contained 18 ppb gold.
Province: Superior
Subprovince: Quetico
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Amphibolite
Dec 07, 2005 (D McKay) - The occurrence is located within the Quetico subprovince and is underlain primarily by locally migmatitic, medium- to coarse-grained, moderately foliated, biotite-quartz-feldspar paragneiss. The rocks in the vicinity of the occurrence are moderately to locally strongly foliated (255 degrees/subvertical). Mineral assemblages suggest these rocks have experienced upper amphibolite facies-grade regional metamorphism (Williams and Breaks 1990). The Little Nama Lake Lineament, a regional-scale, easterly-trending topographic feature, is located approximately 750 m south of the occurrence (Coates 1968, Map 2141).
| Rock Type | Rank | Composition | Texture | Relationship | Paragneiss | 1 | Bio-Q-Fel Paragneiss | Migmatitic | Host |
|---|
Dec 07, 2005 (D McKay) - The occurrence is located within the Quetico subprovince and is underlain primarily by locally migmatitic, medium- to coarse-grained, moderately foliated, biotite-quartz-feldspar paragneiss.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Pyrrhotite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore |
Dec 07, 2005 (D McKay) - In his report for the area, Coates (1968, p.16) stated: There are many small sulphide occurrences in the area. The main minerals are pyrrhotite and pyrite with small amounts of chalcopyrite. Where the mineralization is associated with the biotite-quartz-feldspar migmatite, it occurs with quartz in conformable zones that often, though not always, have been sheared. Graphite is present in many of these occurrences. Outcrops have a rusty appearance on the weathered surface, showing that this type is similar in many respects to fahlbands (Gammon 1966). Assays of samples taken by the author from several showings of this type indicated trace amounts of copper, chromium, manganese, and titanium. Similar sulphide occurrences are widely distributed throughout the metasedimentary rocks in the surrounding area. Most of these occurrences contain slightly anomalous quantities of base metals and occasionally gold. The economic potential of these occurrences is restricted by their small size, erratic distribution and low metal content.
| Rank | Classification |
|---|---|
| 1 | Unknown |
| Rank | Characteristic |
|---|---|
| 1 | Disseminated |
Map - Stevens-Kagiano Lake area, District of Thunder Bay
Publication Number: P0362 Scale: 1:63,360 Date: 1997
Author: Coates M.E.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Mineral Occurrences in the Manitouwadge Area, Volumes 1, 2 and 3
Publication Number: OFR5906 Date: 1994
Author: McKay D.B.
Publisher Name: Ontario Geological Survey
Location:
File - Resident Geologist Schreiber-Hemlo files
Publication Number: Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Map - Stevens sheet, Thunder Bay District
Publication Number: M2141 Scale: 1:63,360 Date: 1967
Author: Coates M.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Manitouwadge sheet, districts of Thunder Bay and Algoma, geological compilation series
Publication Number: P0494 Scale: 1:126,720 Date: 1997
Author: Milne V.G.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Stevens-Kagiano Lake area, District of Thunder Bay
Publication Number: R068 Date: 1968
Author: Coates M.E.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Geology of the Manitouwadge-Hornepayne area
Publication Number: OFM0142 Scale: 1:50,000 Date: 1990
Author: Williams H.R., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
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