Ontario Geological Survey
Permanent Link to this Record:
MDI52O04NW00006
| Record Name(s) | Fawthrop Lake No. 2 - 1969, Ferdinand Lake No. 2 - 1969 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1986-Oct-15 |
| Date Last Modified | 2022-Feb-24 |
| Created By | |
| Revised By |
Primary Commodities: Molybdenum
Township or Area: Ferdinand Lake Area
Latitude: 51° 12' 41" Longitude: -91° 54' 25.84"
UTM Zone: 15 Easting: 576333 Northing: 5673900 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52O04NW
Point Location Description: Mo symbol with trenches on OGS map P2346
Location Method: Data Compilation
Access Description: Located 136 km ENE of Red Lake and accessible only by helicopter. There are no lakes nearby large enough for float-equipped plane. The power line from Ear Falls to Pickle Lake lies 2.5 km to the south.
1969: Madsen Red Lake Gold Mines explored this property, carrying out prospecting, trenching and diamond drilling (2 holes - No.3 & 4 / 155 ft total) with a light drill. 1973: Umex Inc. conducted a regional aeromagnetic survey (Matfry 'C').
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 11 | 52O04NW8967 | 52O04NW8967 |
| 63E.22 | 52O04NW0005 | 52O04NW0005 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Birch-Uchi
Geological Age: Archean
Jun 22, 2007 (Mark Puumala) - The Fawthrop-Senior Lakes area is underlain by a narrow (1.1 to 3.9 km wide) east-west-trending supracrustal rock sequence that represents an eastern extension of the Birch-Uchi Greenstone Belt. Sage and Breaks (1982) indicate that the belt is dominated by mafic to intermediate metavolcanic rocks, with only local occurrences of felsic to intermediate metavolcanic and metasedimentary rock. Mafic to ultramafic intrusions have been mapped in the area between Fawthrop and Senior Lakes, while east-west-striking quartz and/or feldspar porphyry dikes are reported to be common in the eastern portions of the belt. The supracrustal rocks are bounded to the north and south by large granitoid intrusions. Sage and Breaks (1982) report that foliation in the Fawthrop-Senior Lakes area generally strikes approximately east-west, and that the supracrustal rocks form a westward-plunging (30 degrees) synform structure. It has also been interpreted that the supracrustal rocks in this belt were likely to have once formed a single continuous sequence eastward linked to similar rocks in the Wesleyan Lake area at the west end of the Meen-Dempster Greenstone Belt.
| Rock Type | Rank | Composition | Texture | Relationship | Felsic Gneiss | 1 | Granitic Gneiss | Host |
|---|
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Molybdenite | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Pyrrhotite | Economic | Ore | ||||
| 4 | Chalcopyrite | Economic | Ore |
Jun 22, 2007 (Mark Puumala) - This molybdenum occurrence is described by Innes (1969) as being associated with quartz veins in granitic gneiss. One mineralized vein was described as a relatively flat-lying vein ranging from 1 to 15 cm wide, while others were described as east-west striking, steep southerly dipping veins 1 to 10 cm wide. The steep-dipping veins are apparently only found at this location below the flat-lying vein (i.e., possibly displaced by faulting along this apparently later structure). The mineralization is reported to occur in an area of approximately 60 by 30 metres that was exposed in 5 trenches, and consists of molybdenite flakes in both quartz and the adjacent wall rock. Innes (1969) indicates that the molybdenum mineralization appears to only be found in close proximity to the flat-lying vein (i.e., within 2 m). However, mineralization in the steep-dipping veins more than 2 m below the flat-lying vein was reported to contain increasing concentrations of pyrite, pyrrhotite and chalcopyrite. Innes (1969) reported surface sample assays of up to 0.49% MoS2, while an assay of 0.08% MoS2 was reported over 0.58 m in Madsen Red Lake Mines ddh No. 3 (AFRI# 52O04NW8967).
| Rank | Classification |
|---|---|
| 1 | Porphyry |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts
Publication Number: M2218 Scale: 1:253,440 Date: 1976
Author: Sage R.P., Breaks F.W., Troup W.R.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay
Publication Number: R207 Scale: Date: 1982
Author: Sage R.P., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Geological series, Precambrian geology of the Ferdinand Lake area, eastern part, Kenora District, Patricia Portion
Publication Number: P2346 Scale: 1:15,840 Date: 1980
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Geology of the Ferdinand Lake area, District of Kenora, Patricia Portion
Publication Number: MP109 Scale: Date: 1983
Author: Wallace H.
Publisher Name: Ontario Geological Survey
Location:
Article - Red Lake District
Publication Number: MP033.001 Scale: Date: 1997
Author: Riley R.A.
Publisher Name: Ontario Dept. of Mines
Location:
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