Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F07NE00038

Record: MDI52F07NE00038

General

Commodities

Primary Commodities: Gold, Silver

Location

Township or Area: Boyer Lake Area

Latitude: 49° 22' 59.08"    Longitude: -92° 31' 34.88"

UTM Zone: 15    Easting: 534377   Northing: 5470150    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F07NE

Point Location Description: Precise, DDH TC08-06, file 20000004028.

Location Method: Conversion from MDI

Access Description: The Armstrong occurrence is located approximately 49 km southeast of the City of Dryden, Ontario. Access is gained by truck, travelling approximately 39 km east of Dryden on Highway 17 to the Snake Bay Road, then south to the Thunder Cloud Road. An all-terrain vehicle (ATV) is required to access the property via a brushed out trail, which departs from the Thunder Cloud Road. The final 300 m to the main showing and other showings was traversed on foot. (OFR 6146, p. 18, 2004)

Exploration History

The first documentation of work in the vicinity of the Armstrong occurrence was in the late 1930s when the Pelham Prospect was discovered. In 1937, the occurrence was located and staked by a Mr. Fornieri as part of a larger property known as the Fornieri Option. Options to Bob Josey and Associates and M.T. O'Brien Limited resulted in trenching, sampling, geological mapping and diamond drilling all submitted as the Fornieri Option. 2003-2006: Glatz and Riives conducted trenching, channel sampling, assaying and analysis programs. 2008: Teck Cominco Limited performed drilling, trenching, sampling assaying and analysis. 2018-2021: Dynasty Gold Corp conducted bedrock trenching, mapping, rock sampling, assaying and analyses.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Western Wabigoon

Belt: Eagle-Wabigoon-Manitou

Geological Age: Precambrian  

Lithology

Mineralization

Mineralization Comments

Feb 24, 2010 (C Ravnaas) - Best assay: 0.32 opt Au over 1.0 m. The first documentation of work in the vicinity of the Armstrong occurrence was in the late 1930s when the Pelham Prospect was discovered. In 1937, the occurrence was located and staked by a Mr. Fornieri as part of a larger property known as the Fornieri Option. Options to Bob Josey and Associates and M.T. O'Brien Limited resulted in trenching, sampling, geological mapping and diamond drilling all submitted as the Fornieri Option. Assays from chip samples outlined areas of significant gold mineralization including Zone 12A, which assayed up to 1.43 ounces gold per ton over 2.2 feet and traced along strike for 50 feet. Significant drill intersections included a section, which assayed 0.74 ounce gold per ton over 2.5 feet in hole number 6 (Kenora District Office, assessment files, 52F/07NE F-2). The Armstrong occurrence is underlain by rocks of the Eagle-Wabigoon-Manitou lakes greenstone belt. Parker (1989, p.96) describes the geology of the Armstrong occurrence: "… is situated at the contact between metavolcanic rocks and the Thundercloud Porphyry. The occurrence has been described as a northeast-trending, fractured, silicified, pyritic zone within a "brecciated conglomerate" (Fornieri Option, Assessment Files, Resident Geologist's Office, Kenora). P. Neilson (geologist, Noranda Ltd., personal communication, 1986) described the host rock as a heterolithic breccia." The author, assisted by A. Raoul, District Support Geologist, Kenora, collected 16 grab samples from various locations on the property and 2 locations located on Thundercloud Road. Six samples returned values for gold following gravimetric fire assay, results are shown on Table 4. The current property owners conducted a systematic lithogeochemical and humus sampling program over the property and have kept GPS location data for each sample. Assay results from grab samples are reported to be as high as 0.42 ounce gold per ton from brecciated conglomerate. At the main showing, a large stripped area was observed. The stripping is believed by the property owners to have been conducted by Noranda Explorations Ltd. in the 1990s. Several channel sample cuts were observed along the length of the stripped area. The host rock appears to be a heterolithic breccia or a volcaniclastic conglomerate. A quartz-eye porphyry dike, striking 004°, crosscuts the breccia and is weakly magnetic. Sections of the breccia are silicified, very massive and fractured in places. Sample PH-04-088 was collected from this location, and assayed 0.17 ounce gold per ton; this sample was from a gossanous portion of the outcrop and displayed possible silicification and chloritization. A second location, approximately 100 m north, was visited and is believed by A. Glatz to be the original Armstrong occurrence, the dimensions of the stripped area is 20 by 20 m. At this location, a quartz-eye porphyry intrusion is in contact with the heterolithic breccia. The porphyry is highly siliceous and contains up to 2-3% sulphides. A very fine-grained mafic intrusive is observed and may represent a late mafic dike. Grab samples collected by A. Glatz are reported to have assayed up to 0.42 ounce gold per ton from this location. Five grab samples were collected, and sent for gravimetric fire assay; sample PH-04-092 was collected from a sulphide-rich zone, and returned 0.16 ounce gold per ton. The author was not able to determine whether the sample was of altered porphyry or heterolithic breccia. Several other small exposures were examined and sampled. Gold values from 0.03 to 0.01 ounce gold per ton were returned from assays for 4 out of 8 samples. (OFR 6146, p. 18, 19, 2004)

Apr 25, 2024 (Nazha Sabiri) - Assays from grab samples on Area 6, returned best results. Sample 703- 12549 ppb Au and 214 ppm Ag; sample #669- 18240 ppb Au and 25.2 ppm Ag; sample #689- 7543 ppb Au and 109.5 ppm Ag over 1.5 m; sample #670: 4183 ppb Au and 22 ppm Ag over 1.4 m. (20000001701). A mafic volcanic interval of hole TC08-06 returned best assays for gold and silver of 2.69g/t Au and 48.9g/t Ag over 2.0 m. (20000004028)

Mineral Record Details

References

File - Resident Geologist files AF 52F07NE F-1

Publication Number: Date: 1996

Author:

Publisher Name:

Location: Kenora RGP

Mono - Report of Activities 2004, Resident Geologist Program, Red Lake Regional Resident Geologist Report: Red Lake and Kenora Districts

Publication Number: OFR6146 Page: 18-19  Date: 2005

Author: Lichtblau A.F., Hinz P., Ravnaas C., Storey C.C., Kosloski L., Raoul A., Gula R.

Publisher Name: Ontario Geological Survey

Location:

File - Resident Geologist files AF 52F07NE F-2

Publication Number: Date: 1996

Author:

Publisher Name:

Location: Kenora RGP

Article - Gold studies in the Manitou Lakes-Stormy Lake belt, districts of Kenora and Rainy River

Publication Number: MP141.017 Page: 130  Date: 1997

Author: Parker J.R., Perrault M.

Publisher Name: Ontario Geological Survey

Location:

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