Ontario Geological Survey
Permanent Link to this Record:
MDI52E16SW00091
| Record Name(s) | Scramble Mine - 9999, Homestake - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect With Reported Reserves or Resources |
| Date Created | 2002-Sep-11 |
| Date Last Modified | 2022-Jul-29 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Silver
Township or Area: Jaffray
Latitude: 49° 47' 9.87" Longitude: -94° 22' 29.75"
UTM Zone: 15 Easting: 401027.837 Northing: 5515752.85 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E16SW
Point Location Description: Precise
Location Method: Conversion from MDI
Feb 09, 2011 (C Ravnaas) - The Scramble Mine gold deposit is located about 8 kilometres east of the town of Kenora in Northwestern Ontario. The mine was discovered in 1894 but after an initial exploration phase remained essentially dormant until 1984 when Boise Cascade Canada Ltd. commenced an evaluation of the property. Since then approximately 5,200 metres of diamond drilling, 250 metres of surface stripping with sampling and 450 metres of underground development have taken place. The Scramble Mine area is underlain predominantly by tholeiitic pillowed flows, minor mafic tuffaceous units, exhalites (?) and occasional felsic units. All the volcanic rocks on the property face and dip steeply to the northwest. Foliation tends to subparallel bedding. Deformed pillows, shearing and shear folding occur throughout the property and are well exposed at the mine site. Quartz-tourmaline veins both concordant and discordant to foliation are ubiquitous. Nowhere on the property has there been observed an area of significant alteration due to a primary volcanogenic hydrothermal system. Reference: Parr, M. and Kuehnbaum, R. 1990. The Scramble Mine gold Deposit; Field Trip No.2, Canadian Institute Mining, Metallurgy and Petroleum, Exploration and Mining Geology, 14th Annual Meeting, pp. 41-65.
| Rock Type | Rank | Composition | Texture | Relationship | Mylonite/Fault Gouge/Pseudotachylite | 1 | Shear Zones | Contains | N/A |
|---|---|---|---|---|
| Vein | 2 | Contains | N/A |
Feb 09, 2011 (C Ravnaas) - Gold mineralization occurs in a variety of rocks contained within a zone of shearing referred to as the Scramble Zone. A total of 250 metres of strike length is exposed in the shaft and decline areas. This exposure of the mineralized zone allows excellent visualization of the severe structural and lithological complexities interpreted from drill core, as well as correlation problems of rock types and mineralization. The Scramble zone is contained in a sequence of pillowed basalt flows which are progressively deformed and altered towards a sulphide-and gold-enriched, micaceous core. The zone of mineralization, including pyrite-gold enriched biotite-rich schist felsic units and veins, extends on surface and in drill holes for about 550 metres. In the stripped area east and west of the Scramble shaft, intense deformation has resulted in buckling, folding, dismemberment and boudinaging of the competent units (felsic rocks and Quartz bodies) within the relatively incompetent biotite-rich schists. Reference: Parr, M. and Kuehnbaum, R. 1990. The Scramble Mine gold Deposit; Field Trip No.2, Canadian Institute Mining, Metallurgy and Petroleum, Exploration and Mining Geology, 14th Annual Meeting, pp. 41-65.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Silver | Economic | Ore | ||||
| 4 | Chalcopyrite | Economic | Ore |
Feb 09, 2011 (C Ravnaas) - Gold mineralization occurs in a variety of rock types within the Scramble zone. However, the overall distribution of gold is controlled by poorly understood factors: the presence/absence, thickness and grade of the Quartz bodies; degree of 'silicification' or early veining; and the diluting and disrupting effects of the felsic rocks. All of these may be the result of post-depositional tectonism. In other words, an earlier and relatively predictable distribution of gold within the Scramble system could have been later modified into a more chaotic pattern. The degrees of biotitization and sulphidization appear to have played a less important role. The gold mineralized system hosted by an assemblage of sulphide and quartz bearing biotite-rich schists hosted in a series of pillowed basalts. Drilling to date has indicated a resource of approximately 70,000 ounces (using a cut off grade of 0.05 oz/t) containing a probable reserve of 150,000 tons at 0.24 oz It (using a cut off grade of 0.15 oz It) • The mineralization has a strike length of at least 450 metres and extends to a depth of 150 metres at the west end of the zone. The zone strikes in a northeasterly direction and dips to the northwest at about 800 Reference: Parr, M. and Kuehnbaum, R. 1990. The Scramble Mine gold Deposit; Field Trip No.2, Canadian Institute Mining, Metallurgy and Petroleum, Exploration and Mining Geology, 14th Annual Meeting, pp. 41-65.
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Scramble | 1990 | Possible | 150000 | Parr and Kuehnbaum, 1990, Scramble Mine in CIM 14th Annual Meeting Field Trip notes | Possible Resource Estimate: 150 000 t grading 0.24 opt Au Drill estimated: 70 000 oz Au cut-off 0.05 opt Au |
Book - MNI FILE, 52E/16 AU 10
Publication Number: N/A Date:
Author:
Publisher Name:
Location:
Book - Northern Miner 84-10-25, Boise, p. 3
Publication Number: NMINER Date:
Author:
Publisher Name: Northern Miner
Location:
Book - Northern Miner 85-03-07, Kennco, p. C12
Publication Number: NMINER Date:
Author:
Publisher Name: Northern Miner
Location:
Part - Mines of northwestern Ontario
Publication Number: ARV07-01.003 Page: 58-59 Date: 1998
Author: Bow J.A.
Publisher Name: Ontario Bureau of Mines
Location:
Mono - Gold deposits of the Kenora-Fort Frances area, districts of Kenora and Rainy River
Publication Number: MDC016 Page: 36 Date: 1976
Author: Beard R.C., Garratt G.L.
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: 36 Date: 1976
Author: Beard R.C., Garratt G.L.
Publisher Name: Ontario Division of Mines
Location:
Mono - The geological setting of gold occurrences in the Lake of the Woods area
Publication Number: OFR5695 Page: 289-292 Date: 1988
Author: Davies J.C., Smith P.M.
Publisher Name: Ontario Geological Survey
Location:
We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.
Please review our Terms of Use agreement for this data product.
For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office