Ontario Geological Survey
Permanent Link to this Record:
MDI52N04SW00325
| Record Name(s) | Pine Showing - Marker Island - 1991 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1991-Mar-11 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Copper
Secondary Commodities: Gold
Township or Area: Fairlie
Latitude: 51° 2' 21.91" Longitude: -93° 57' 16.4"
UTM Zone: 15 Easting: 433076.66 Northing: 5654642.057 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52N04SW
Point Location Description: N/A
Location Method: Conversion from MDI
1930s: Ground originally staked by persons unknown (Fisher?). Limited prospecting and development. 1969: Ground was optioned to the Madsen Red Lake Gold Mines Limited by C. Fuller Pine of Balmertown who had staked the property earlier. 1970: Trenching, prospecting, EM and magnetometer surveys. 1976: The ground was held by C.W. Peterson of Red Lake. Five diamond drill holes.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.14309 | 52N04SW0007 | 52N04SW0007 |
| 31 | 52N04SW0145 | 52N04SW0145 |
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 island is situated to the west of the Dome Stock and is primarily underlain by mafic and ultramafic flows. Pillow structures have been observed with tops indicated to the northwest. The west side of the island is comprised of intercalated ultramafic flows and iron formation and greywacke units. Asbestos stringers have been observed in the ultramafic rocks. DEPOSIT DESCRIPTION: Mineralization occurs primarily in the metasediments in the form of chalcopyrite and pyrrhotite. The most concentrated mineralization occurs on the south side of the iron formation and may be associated with a small fault. A 15 cm zone with up to 10% chalcopyrite in a matrix of coarse amphibolite is found here. This zone occurs along the west side of a 1.2 m zone of sulphide and carbonate mineralization. The mineralization zone narrows to the south, down to an average thickness of 10 cm to 30 cm. The zone can be traced intermittently for about 60 m. Within the iron formation, chalcopyrite and pyrrhotite occur in narrow stringers and disseminations. GEOPHYSICAL DATA: A short, moderate to weak EM anomaly is located to the south of the prospect, striking EW. A weak magnetic high is associated with the conductor, and probably outlines the iron formation.
| Rock Type | Rank | Composition | Texture | Relationship | Sandstone | 1 | Greywacke | Host |
|---|---|---|---|---|
| Ironstone-unsubdivided | 2 | Iron Formation | Host | |
| Peridotite | 3 | Flows, Peridotite | Serpentinized | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Copper | Economic | Ore | ||||
| 4 | Malachite | Economic | Ore | ||||
| 5 | Pyrrhotite | Economic | Ore | ||||
| 6 | Sphalerite | Economic | Ore | ||||
| 1 | Carbonate | Economic | Gangue | ||||
| 2 | Amphibole | Economic | Gangue | ||||
| Carbonate | Alteration | Carbonatization | 1 | Strong | Replacement | ||
| Quartz | Alteration | Silicification | 2 | Weak | Disseminated |
Dec 07, 2005 (K R Kettles) - MDI DATA: GRADE - OGS GRAB SAMPLES FROM TRENCHES: ASSAYS UP TO 3.9%CU, 0.15%ZN,0.23 OPT AG,0.01 OPT AU, GRADE - DDH: UP TO 0.04 OPT AU OVER 1.5 M (NOT CONFIRMED WHEN RESPLITTED), 0.22 OPT AG, NATIVE COPPER SHOWING ON SHORE DUE NW: WAS REVEALED BY LOW WATER LEVEL, GRAB SAMPLES ABOUT 2%CU Grab samples from trenches have returned assays of up to 3.9% Cu, 0.15% Zn, 0.23 oz/ton(7.886 g/tonne)Ag, 0.01 oz/ton (0.343 g/tonne) Au. Assayed sections of the drill core, 1.5 m in length returned values of up to 0.04 oz/ton (1.371 g/tonne)Au.
Dec 07, 2005 (K R Kettles) - The host rocks of the mineralization have been highly carbonatized, and some silicification has been noted.
Book - Resident Geologist files AF RL 1985 FAIRLIE #63,64
Publication Number: AF RL 1985 Date: 1985
Author:
Publisher Name:
Location: Red Lake RGP
Map - Fairlie Township, Kenora District
Publication Number: M2407 Scale: 1:12,000 Date: 1978
Author: Riley R.A.
Publisher Name: Ontario Geological Survey
Location:
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Page: 467-468 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
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