Ontario Geological Survey
Permanent Link to this Record:
MDI52F07SW00003
| Record Name(s) | Dryden-Red Lake - 1932 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1983-May-26 |
| Date Last Modified | 2022-Aug-04 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Lower Manitou Lake Area
Latitude: 49° 19' 36.41" Longitude: -92° 55' 17.27"
UTM Zone: 15 Easting: 505706.749 Northing: 5463786.363 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F07SW
Point Location Description: Precise
Location Method: Conversion from MDI
Access Description: The occurrence is located North 51 km south of Dryden, at a point about 2 km north of Blanchard Bay of Lower Manitou, on the west side of the south-flowing creek which connects Early Lake to Blanchard (or Shaughnessy) Bay. Access is via motor boat or float plane to Blanchard Bay. The occurrence consists of four exploration pits over a length of 60 metres. (OFR 5731, p. 52; 1990)
1932-1933: The occurrence was discovered by the Dryden-Red Lake Prospecting Partnership (Thomson 1933). Thomson carried out pitting and sampling. 1987: D. Nelson carried out geological, soil, and rock geochemistry surveys.
Province: Superior
Subprovince: Wabigoon
Terrane: Western Wabigoon
Belt: Eagle-Wabigoon-Manitou
Geological Age: Precambrian
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate lava flow-unsubdivided | 1 | Andesite | Adjacent |
|---|---|---|---|---|
| Mylonite/Fault Gouge/Pseudotachylite | 2 | Shear Zone | Contains | |
| Vein | 3 | Contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 5 | Gold | Economic | Ore | ||||
| 10 | Pyrite | Economic | Ore | ||||
| 15 | Pyrrhotite | Economic | Ore | ||||
| 20 | Tourmaline | Economic | Ore |
Feb 22, 2010 (C Ravnaas) - The occurrence is underlain by mafic metavolcanic rocks of the Blanchard Lake group (Blackburn 1976, 1982). The shear zone consists of a carbonatized mica-hornblende-plagioclase schist. The zone is strongly schistose and very fissile, and is about 5 m wide. The schistosity (360°/66° E) is clearly rotated into the shear fabric (020°/40° E), indicating a dextral component of horizontal movement. The shear can be traced for a minimum length of 700 m according to Thomson (1933). A few hundred metres to the north of the prospect occur extension quartz veins (65°/70° N), some of which are folded into a Z-shape, supporting the interpretation of a dextral component of horizontal movement. The dip of the quartz veins varies from 30 to 660 to the east. The overall attitude of the quartz veins therefore suggests a dextral, west-side-down, oblique-slip movement along the shear zone. Interpretation of a humus geochemical survey done by D. Nelson in 1987 over a grid with 120 m line spacing (Assessment Files, Resident Geologist's Office, Kenora), indicates two extensive sinuous anomalous gold zone (3 ppb to 34 ppb) having a right stepping attitude over a 1.2 km strike length (figure 7). This interpretation suggests a dextral sense of strike-slip component of movement during shearing. The opaque quartz-carbonate veins at the occurrence are commonly pale to dark grey, to pale yellowish brown, and locally white, and generally have a sugary texture. In Pit 2, four veins are observed in the shear zone. Their width varies from 10 to 40 cm, and some are boudinaged. Ankeritic alteration commonly occurs within the quartz veins. Accessory minerals are chlorite in clots, and rare tourmaline and hornblende. In some cases the veins have a laminated appearance due to hornblende or chlorite seams. Less than IX fine to medium grained pyrite occurs within the quartz veins, whereas the wall rocks have up to 2% pyrrhotite and pyrite combined. Nine grab samples were taken by the author (Table 6). The best sample came from Pit 4, where a quartz vein assayed 0.658 ounce gold per ton. One of the three grab samples from the carbonatized mica-horblende-plagioclose schist assayed 0.048 ounce gold per ton. (OFR 5731, p. 52-57; 1990)
Aug 04, 2022 (Q Unknown) - 1932-33: two samples, one from Pit 2 which assayed 0.034 ounces gold per ton across 8 feet, and one from Pit 4 which assayed 0.44 ounces of gold per ton across 4 feet. 1987: best chip sample assayed 0.81 ounces of gold per ton over 90 cm (Assessment Files, Resident Geologist's Office, Kenora).
Part - Geology of the Manitou-Stormy lakes area
Publication Number: ARV42-04.001 Page: 30-31 Date: 1998
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the Lower Manitou-Uphill lakes area, District of Kenora
Publication Number: R142 Page: 70-71 Date: 1976
Author: Blackburn C.E.
Publisher Name: Ontario Division of Mines
Location:
Mono - Gold deposits of the Kenora-Fort Frances area, districts of Kenora and Rainy River
Publication Number: MDC016 Page: 14 Date: 1976
Author: Beard R.C., Garratt G.L.
Publisher Name: Ontario Division of Mines
Location:
Mono - Feasibility of small scale gold mining in northwestern Ontario (parts of the districts of Kenora, Rainy River, and Thunder Bay), volume 1, text, volume 2, appendices
Publication Number: OFR5332 Page: 36-37 Date: 1981
Author: Neilson J.N., Bray R.C.E.
Publisher Name: Ontario Geological Survey
Location:
Mono - Property visits by the Dryden area mineral commodity geologist, 1989
Publication Number: OFR5731 Page: 52-57 Date: 1990
Author: Delisle P.C.
Publisher Name: Ontario Geological Survey
Location:
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