Ontario Geological Survey
Permanent Link to this Record:
MDI52F09NW00015
| Record Name(s) | Big Ruby - 1898 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1986-Jul-07 |
| Date Last Modified | 2022-Mar-18 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Copper, Silver
Township or Area: Southworth
Latitude: 49° 40' 28.89" Longitude: -92° 29' 25.8"
UTM Zone: 15 Easting: 536760 Northing: 5502587 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52F09NW
Point Location Description: Mineral occurrence at surface symbol (Map, GDIF322)
Location Method: Field Visit
Access Description: The Big Ruby Occurrence is located in Concession IV, lot 8, southworth Township, north of Dinorwic Lake. The occurrence is approximately 2.3 km south of Dinorwic, on mining locations H.W. 125 or H.W. 126 and is accessible from the Trans Canada Highway.
1898: A shaft was sunk 9.1 metres. 1987: Patented claims owned by Mr. J. Gaudette, Ignace. The occurrence is situated within monotonous mafic metavolcanic flows within a major shear zone associated with the Manitou Straits Fault. A.P. Coleman (1898) described the occurrence as follows: "A short distance from the lake the main shaft was being sunk in chlorite schist and at the time was 9.0 metres deep. The vein, which is a bedded one, consists of a mixture of quartz and slate about 2.0 metres in width. Near the bottom of the shaft 0.6 metre of solid quartz was visible on the wall, but this mass may be much wider as it was not all exposed. There is considerable iron pyrites in the quartz. Near the shore of the lake a similar bedded vein has been sunk on for a few feet. The quartz is here more mixed with schist. Small grains of native copper are found on the location." The author was unable to locate the shaft. Mr. J. Gaudette, owner of the two patented claims, indicated to the author that the shaft may be buried under an old garbage dump at the extreme northwest corner of mining location H.W. 126. Mr. Gaudette stated that the previous owner of the claims had filled a deep, timbered, hole with garbage (Mr. J. Gaudette, Ignace, personal communication, 1986). The author located a shear zone on the north shore of Dinorwic Lake, in excess of 300m wide and striking 040°, with lineations plunging 050° - 060° 0 to the southwest. The zone consists of chloritized and variably sheared mafic metavolcanics with strong iron carbonate alteration. Satterly (1943) mapped these rocks as carbonate-chlorite schist. The shear zone hosts irregular veins, clots, and discontinuous stringers of quartz-iron carbonate, as well as narrow (7cm-10 cm), horizontal, quartz-calcite filled fractures, crosscutting shearing. Veins commonly host minor amounts of disseminated pyrite, chalcopyrite, and arsenopyrite, with one vein hosting up to 30% pyrite. Grab samples from the shaft assayed 1.0 ounce gold per ton to 82.0 ounces gold per ton with a chip sample across the shaft assaying 0.38 ounce gold per ton (Coleman 1898). Grab samples taken by the author, from the quartz veins on the lakeshore, assayed between 3 ppb gold and 65 ppb gold and between 20 ppm arsenic and 1.54% arsenic. (OFR5723, p.171-172, 1989)
Province: Superior
Subprovince: Wabigoon
Terrane: Western Wabigoon
Belt: Eagle-Wabigoon-Manitou
Geological Age: Precambrian
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Host |
|---|---|---|---|---|
| Vein | 1 | Quartz | Contains |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore |
Mar 18, 2022 (Therese Pettigrew) - Interbedded quartz and slate. Mineralized zone 6 ft. wide. Assays reported from 1 oz. to 82 oz. per ton. Minor native Cu noted on the property (MDC016 p. 9)
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Big Ruby | 1981 | Unclassified | 3175 | 3,500 tons (to 100 ft) | Gold 0.5 oz/T | |
| Big Ruby | 1981 | Possible | 1360 | 1,500 tons (to 30 ft) | Gold 0.5 oz/T |
Part - Fourth report on the west Ontario gold region
Publication Number: ARV07-02.001 Scale: Date: 1998
Author: Coleman A.P.
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 Scale: 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 Scale: Date: 1981
Author: Neilson J.N., Bray R.C.E.
Publisher Name: Ontario Geological Survey
Location:
Compend - Report of activities, 1984, Regional and Resident Geologists
Publication Number: MP122 Scale: Date: 1985
Author: Kustra C.R.
Publisher Name: Ontario Geological Survey
Location:
Mono - Geology, gold mineralization and property visits in the area investigated by the Dryden-Ignace economic geologist, 1984-1987
Publication Number: OFR5723 Scale: Date: 1989
Author: Parker J.R.
Publisher Name: Ontario Geological Survey
Location:
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