Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI53F03SW00003

Record: MDI53F03SW00003

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Granite Bay Area

Latitude: 53° 3' 47.29"    Longitude: -93° 23' 3"

UTM Zone: 15    Easting: 474256   Northing: 5879363    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 53F03SW

Point Location Description: Sample locations in Assessment report 20000008751

Location Method: Data Compilation

Access Description: 225 km North of Red Lake and 70 km SE of the Manitoba-Ontario border. Sandy Lake settlement is 7 km north, served by regular airline flights.

Exploration History

1937: Prospectors Airways conducted prospecting and limited diamond drilling. 1937-45: Berens River Mines conducted prospecting, sampling and limited drilling. 1962: Noranda Mines conducted geophysical surveys. Can-Oxy Ltd did exploration in 1982-83 but abandoned work before the recommended surveys could be completed, performed geological mapping, magnetometer, VLF-EM surveys, soil and rock geochemistry, trenching, and drilled 3 DDH totalling 289 m. 1985-86: Eveon Exploration Syndicate-Goldeye Ltd carried out magnetic and VLF-EM surveys. 1987-88: Freewest Resources Inc and Goldeye Explorations Ltd. conducted IP, magnetometer, and VLF-EM surveys, and drilled 3 drill holes totalling 314.6 m in the area. 2013: Goldeye Explorations Ltd. carried out mapping, channel sampling, and IP and magnetic ground geophysical surveys. 2014: Goldeye drilled 23 DDH totalling 2219 m. 2015: GPM Metals Inc. entered into an option agreement with Goldeye and carried out a 1274 km magnetic/VTEM. 2016: Treasury Metals acquired Goldeye.

Assessment Work on File

Geology

Province: Superior

Subprovince: Sachigo

Terrane: North Caribou

Belt: Sandy Lake

Geological Age: Archean  

Lithology

Mineralization

Mineralization Comments

Apr 24, 2014 (A McKee) - GRADE 1938: ODM GRAB SAMPLE ASSAY UP TO 0.39 OPT AU, GRADE 1936-45: BERENS RIVER DRILL SEVERAL DDH, BEST SECTION 0.135 OPT AU /18.6 FT, GRADE 1988: 3 DDH, BEST SECTION 0.24 OPT AU/ 2.7 FT (SL-88-1), OTHER SEC.WIDER BUT LOWER GR. 2011 No new data. 2014 Drilling assay: BK14-03 - 12.86 g/t Au over 6.85 m, BK14-07 - 12.45 g/t Au over 3.5 m, BK14-16 - 8.59 g/t Au over 6.83 m

Aug 16, 2019 (Therese Pettigrew) - The main gold showing comprises three, close to vertically dipping zones of quartz veining, that extend from a small easterly protruding peninsula at the north shore of the lake to the southeast (145 degrees). Best reported values include 8.2 feet of 0.206 oz/ton and 0.5 feet of 1.56 oz/ton gold. The strike of the veins is oblique to the overall strike direction of lithologies in this part of the Northwest Arm, which is close to 120 degrees, concluding from geophysical surveys. A second zone located about 260 feet to the west, is striking north-south and is indicated over a length of about 320 feet in 5 drillholes with best values of 18.6 feet of 0.135 oz/ton. A talc schist/fault zone striking approximately 115 degrees, cuts this zone off to the south and may also limit the main zone on its south side. Gold mineralization of economic grade is confined to narrow quartz veins carrying minor amounts of sulphides and tourmaline, within the quartz crystal tuff. Assays of up to 0.86 oz/t over 0.6 feet were obtained from DDH SL 88-2 (Assessment report 20000005727). Gold values at Bernadette re associated with discrete quartz tourmaline veining, hosted by variably altered quartz crystal tuff. Bleached alteration haloes around the veins host weakly to highly anomalous gold values. Veins are relatively narrow (0.1 to 0.5 metres), however multiple vein sets are common. Sulphides at Bernadette are generally less than 5% and are dominantly pyrite and pyrrhotite with local chalcopyrite. Coarse visible gold within the quartz-tourmaline veins has been noted by past workers. Sample 586402 returned an assay of 11.7 g/t Au. Sample 586341 returned an assay of 16.1 g/t Au. Sample 586349 returned an assay of 43.5 g/t Au. The Knoll zone (located at NAD83 Zone 15 474148 m E, 5879351 m N) shows a relatively wide halo of anomalous gold values associated with a complex discordant dilational zone trending north northwest. The showing is unique in the degree of pervasive intense silicification, which has created a large rounded a resistive knob or “knoll” along the shoreline. The host rocks are highly altered quartz crystal tuffs intruded by a mafic dyke. The dyke is several metres thick and intrudes along the hanging wall of the altered structure (shear zone). This shear zone is highly discordant to the regional foliation. The regional foliation was observed in various shoreline exposures, generally expressed as relatively consistent 110 to 130 striking schistosity within wide zones of carbonate-chlorite alteration. The Knoll structure consists of a 10’s of metres thick silica, carbonate and sericite alteration, which appears to overprint a broader biotite dominant alteration. The core of the zone is intensely silicified and quartz veined. There may also be a second, relatively later biotite alteration event related to quartz, quartz tourmaline veining and gold mineralization. Higher grade gold values are associated with quartz tourmaline veining and local silica flooding as smokey grey, mottled to porcelain lustre patches or zones. Sulphides can be disseminated, streaky or blebby. Pyrite, pyrrhotite and chalcopyrite are the dominant sulphides, visually estimated up to 5% but generally less than 2% of the rock volume, with the sulphides often intergrowing or overprinting each other. Quartz veining is multi-phase, with an earlier set of grey quartz veins having diffuse contacts and that are broken, folded and dismembered (boudinage). Quartz tourmaline veining overprints the dismembered grey quartz veins. Tourmaline occurs as trace to 5 % very fine-grained needles within quartz veins, or as an amorphous mixture with biotite along crack-and-seal fractures. Veins are generally less than 30 cm in width, although composite/stockwork zones of quartz veining can be several metres wide. Grey, to smoky grey, mottled quartz flooding appears to be contemporaneous with quartz tourmaline veining (Treasury Metals website http://www.treasurymetals.com).

Aug 16, 2019 (Aisha Samuel) - Minor very fine to fine- grained arsenopyrite is relatively rare, but where observed in core, occurs as needles or granular crystals. Arsenopyrite can occasionally be associated with very high grade gold values, although the correlation of arsenic with gold has not been determined. Diamond drilling results included 12.86 g/t over 6.85 metres (Bernadette), 12.17 g/t over 6.2 metres (Knoll), 8.59 g/t over 6.83 metres (Knoll), and 10.89 g/t over 3.86 metres (Bernadette) (Assessment report 20000008751). DDH BK-14-05 returned 22.45 g/t Au over 3.5 m from the Knoll target. DDH BK-14-03 on Bernadette returned 70.23 g/t Au over 1.15 m (Treasury Metals website http://www.treasurymetals.com/s/goldeye_exploration.asp?ReportID=771305).

Mineral Record Details

References

Part - Geology of the Sandy Lake area

Publication Number: ARV47-07.001 Scale:     Date: 1997

Author: Satterly J.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Operation Lingman Lake

Publication Number: MP027 Scale:     Date: 1969

Author: Bennett G., Riley R.A.

Publisher Name: Ontario Dept. 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:

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For detailed information regarding this mineral record please contact the Red Lake Resident Geologist District Office