Ontario Geological Survey
Permanent Link to this Record:
MDI52N04NW00015
| Record Name(s) | Fahlgren East - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Mar-11 |
| Date Last Modified | 2022-Jun-28 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: McDonough
Latitude: 51° 8' 3.79" Longitude: -93° 50' 7.23"
UTM Zone: 15 Easting: 441554.23 Northing: 5665101.09 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04NW
Point Location Description: N/A
Location Method: Conversion from MDI
1936: The property was covered by a group of claims held by the Dawn Red Lake Group. Prospecting was done on the group of claims held by Dawn Red Lake. 1944: The property was held by J.E.J. Fahlgren. Prospecting and trenching were completed by J.E.J. Fahlgren. 1946: The property was held by Dante Red Lake Gold Mines Ltd. A ground magnetometer survey was completed over the property. 1972: The claim was included in the Ballnik Group of Cochenour Explorations Ltd. A horizontal loop EM survey was completed on the property.
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Red Lake
Geological Age: Archean
Metamorphism Type: Regional
Metamorphism Grade: Greenschist
Dec 07, 2005 (K R Kettles) - Geological Description: The occurrence is underlain by a sequence of northeast striking arkose, greywacke and conglomerate beds. The sediments dip either vertically or steeply to the south. Observed foliation in the area is parallel to subparallel to the strike. On the basis of geophysical data many thin units of iron formation are inferred to be present in the area. DEPOSIT DESCRIPTION: The occurrence is located in a large 150 m wide rusty weathering shear zone. The shear zone is situated along the contact between sedimentary rocks and a lamprophyre dike. Four quartz veins have been discovered in the shear zone. Sulphide mineralization is disseminated throughout the shear zone. GEOPHYSICAL DATA: A small magnetic high is located south of the showing and may indicate the presence of iron formation. A weak EM anomaly has been discovered over the shear zone.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz | Host |
|---|---|---|---|---|
| Sandstone | 2 | Arkose | Near | |
| Conglomerate | 3 | Conglomerate | Near | |
| Terrigenous-Clastic-Unsubdivided | 4 | Greywacke | Near | |
| Ironstone-unsubdivided | 5 | Iron Formation | Interprteted From Mag | Near |
| Mylonite/Fault Gouge/Pseudotachylite | 6 | Shear Zone | Rusty Weathering | Adjacent |
| Lamprophyre-Unsubdivided | 7 | Dike | Adjacent |
Dec 07, 2005 (K R Kettles) - The occurrence is underlain by a sequence of northeast striking arkose, greywacke and conglomerate beds. The sediments dip either vertically or steeply to the south. Observed foliation in the area is parallel to subparallel to the strike. On the basis of geophysical data many thin units of iron formation are inferred to be present in the area. The occurrence is located in a large 150 m wide rusty weathering shear zone. The shear zone is situated along the contact between sedimentary rocks and a lamprophyre dike. Four quartz veins have been discovered in the shear zone. Sulphide mineralization is disseminated throughout the shear zone.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Arsenopyrite | Economic | Ore | ||||
| 3 | Chalcopyrite | Economic | Ore | ||||
| 4 | Pyrite | Economic | Ore | ||||
| 5 | Pyrrhotite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Garnet | Economic | Gangue |
Dec 07, 2005 (K R Kettles) - MDI1 DATA: GRADE - GRAB SAMPLES FROM PITS - 1944: 0.03 AND 0.08 OPT AU - LOCATION FOR THESE ASSAYS COULD BE WRONG The occurrence is located in a large 150 m wide rusty weathering shear zone. The shear zone is situated along the contact between sedimentary rocks and a lamprophyre dike. Four quartz veins have been discovered in the shear zone. Sulphide mineralization is disseminated throughout the shear zone. Grab samples from the pits on the property have returned assays of 0.03 oz/ton (1.029 g/tonne) Au and 0.08 oz/ton (2.743 g/tonne) Au.
File - Resident Geologist files AF RL 1944 McDonough #6
Publication Number: AF RL 1944 Date: 1944
Author: Fahlgren, J.E.J.
Publisher Name:
Location: Red Lake RGP
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Page: 566-567 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
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