Ontario Geological Survey
Permanent Link to this Record:
MDI52E07NE00003
| Record Name(s) | Dead Broke - 1892, Astron Bay - 1997 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1988-Feb-05 |
| Date Last Modified | 2022-Feb-23 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Astron Bay Area, Wiley Bay Area
Latitude: 49° 29' 56.28" Longitude: -94° 31' 46.32"
UTM Zone: 15 Easting: 389250 Northing: 5484050 UTM Datum: NAD83
Resident Geologist District: Kenora
NTS Grid: 52E07NE
Point Location Description: AMIS location
Location Method: Data Compilation
Access Description: Dead Broke Island, or location P64, is 11 km southeast of Wiley Point and 30 km south of Kenora. It is accessible by boat from Kenora or Sioux Narrows.
1892: Owned by J. Haldrith. An open cut and tunnel were made and 25 tons were taken to the Rat Portage Reduction Works. This may have been done by the Climax Gold Mining Co. Ltd. 1989: Noranda carried out sampling. 1997: Arlington Resources Inc. contracted a magnetometer and VLF survey.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 2.17506 | 52E10SE0002 | 52E10SE0002 |
| 2.13120 | 52E09SW0040 | 52E09SW0040 |
Province: Superior
Subprovince: Wabigoon
Geological Age: Archean
| Rock Type | Rank | Composition | Texture | Relationship | Mafic lava flow-unsubdivided | 1 | Basalt |
|---|---|---|---|---|
| Intermediate Pyroclastic Breccia | 2 | Pyroclastic | ||
| Vein | 3 | Quartz | Host |
Jan 14, 2020 (Therese Pettigrew) - The Dead Broke Island Occurrence is located at the eastern end of Dead Broke Island, within heterolithic intermediate pyroclastic metavolcanics which range from tuff-breccia and lapilli-tuff to fine-grained, thinly bedded crystal tuffs. In the vicinity of the showing, the intermediate metavolcanics are locally cut by thin fine-grained biotite alteration zones which give the rocks a dark appearance (Ayer et al., 1987).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Chalcopyrite | Economic | Ore | ||||
| 3 | Galena | Economic | Ore |
Jan 14, 2020 (Therese Pettigrew) - Mineralization occurs as disseminated pyrite within irregular quartz veins in and around two east-trending quartz-biotite porphyritic dikes. Thomson (1937) reported traces of chalcopyrite and galena in samples of quartz found in a dump at the occurrence. He indicates that 75 tons of ore were reportedly removed from the open cut with assays ranging from 0.35 to 6.65 ounce gold per ton (Ayers et al., 1987). Near a contact between basalt and intermediate or felsic pyroclastics, and at the east-central shore of the island, a 2 m wide felsite dike cuts basalt at an angle to foliation. A long pit or open cut has been sunk on the dike, and exposes irregular lenses and veinlets of quartz. Fine pyrite occurs in the altered felsite. A second pit, about 30 m to the north, exposes an irregular quartz vein in the pyroclastics; the quartz contains minor pyrite and traces of galena and chalcopyrite. An open cut was reported, about 6 m long by 3.6 m wide by 1 m deep, was abandoned due to water inflow (the lake level was approximately 1 m lower at that time) and a 7.5 m long tunnel was driven 40 m from the open cut. About 75 tons of ore were removed from the open cut and that assays of this were from $7 to $133 (0.35 to 6.65 oz) gold per ton. Thomson (1936) stated that a sample of the 79 pyrite, chalcopyrite and galena-bearing quartz contained only a trace of gold. Chip samples from the quartz- and pyrite-bearing felsite taken during the 1988 study contained 440 ppb gold (Davies and Smith, 1988).
Mono - The geological setting of gold occurrences in the Lake of the Woods area
Publication Number: OFR5695 Scale: Date: 1988
Author: Davies J.C., Smith P.M.
Publisher Name: Ontario Geological Survey
Location:
Part - Report of the Inspector of Mines
Publication Number: ARV02.017 Scale: Date: 1998
Author: Slaght A.
Publisher Name: Ontario Bureau of Mines
Location:
Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay
Publication Number: MDC013 Scale: Date: 1971
Author: Ferguson S.A., Groen H.A., Haynes R.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
Part - Geology of the north central part of the Lake of the Woods
Publication Number: ARV45-03.001 Scale: Date: 1997
Author: Thomson J.E.
Publisher Name: Ontario Dept. 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:
Article - Geology of the Chisholm Island area, Lake of the Woods, District of Kenora
Publication Number: MP137.004 Scale: Date: 1997
Author: Ayer J.A., Macfie R.I., Buck S.
Publisher Name: Ontario Geological Survey
Location:
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