Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F02NW00003

Record: MDI52F02NW00003

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Mang Lake Area

Latitude: 49° 7' 48.12"    Longitude: -92° 59' 20.43"

UTM Zone: 15    Easting: 500801.997   Northing: 5441910.999    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F02NW

Point Location Description: General

Location Method: Conversion from MDI

Access Description: The occurrence is located on the west shore of the southern end of Vickers Lake. Access to the lake is via Hwy 502, at a point 108 km south of Dryden, where a 150 m long portage leads to the southern end of the lake. The occurrence consists of one shaft, one pit, one trench and three newly stripped areas. (OFR 5731, p. 131)

Exploration History

1911: A.L. Parsons, geologist for Ontario Bureau of Mines, mentioned that a shaft was sunk to about 40 feet, and a test pit to 10 feet. 1984: Northair Mines Ltd. and Sennol Resources Ltd. conducted a geological survey and drilled eight Winkie drill holes for a total of 186.29 m. 1989: Wellington Cove Exploration Ltd. did ground VLF-electromagnetic, magnetic and I.P. surveys, and geological mapping. They stripped the zone surrounding the shaft and the discovery pit, and took rock samples from the stripped areas.

Mineralization

Mineralization Comments

Aug 04, 2022 (Q Unknown) - The occurrence is underlain by pillowed and pillow-brecciated mafic metavolcanics. Pillow rims and epidote clots in the matavolcanics are strongly stretched. Immediately to the west on, the east shore of Vickers Lake, occurs granodiorite of the Irene-Eltrut Lakes batholithic complex (Smith and Stephenson 1988). Structure and Alteration: Strong shearing is preferentially developed in the pillow-brecciated mafic metavolcanics, resulting in a chlorite-plagioclase schist. Anastomosing shears which vary in strike from 285° to 305° dip 85° to the southwest. West-northwest of the shaft a 20 cm wide quartz vein striking 305° swings to 020° over a 3 m length, and swings back again to 305°. This right-stepping feature suggests a dextral component of movement in the horizontal plane. Dextral movement is also indicated by small-scale, tightly Z-shaped folds in the schist close to the quartz vein. Sinistral offset along small-scale faults striking 210° and dipping 40° to the east, suggests that the overall movement was dextral oblique slip. The limonite-stained shear zone is characterized by moderate alteration due to sulphidization, epidotization, and locally pervasive silicification. The width of the alteration envelope varies from 2.5 m to 14 m., and has been exposed over a 120 m length. The main alteration zone is occupied by a quartz vein that pinches and swells, is white and light to dark grey, sugary in texture, is opaque to cloudy, and contains ribbons of chlorite. Calcite occurs in the vein in places. Up to 1% pyrite and pyrrhotite, and <1%, molybdenite and chalcopyrite and traces of sphalerite and galena occur in the vein. The contact between the quartz and its host rock is commonly gradational. At the discovery pit, the newly stripped area exposes the vein over a 1.2 m width and 5.5 m length (figure 16). A 40 m long trench cross-cuts the main zone 48 m northwest of the shaft. Two quartz veins are exposed over a 25 m width in the hanging wall, north of the main zone. The veins vary from 27 to 30 cm in width. Mineralization is much weaker than in the main zone. The wall rock contains about 1-2% very fine grained sulphide minerals. Predominant sulphides are pyrrhotite and pyrite, with traces of chalcopyrite. Fourteen grab samples were taken by the author. Both the wall rock and the quartz vein material returned gold values (Table 21 ). A sample of the quartz vein taken from the discovery pit, which contained 1% pyrrhotite, <1% combined pyrite and chalcopyrite, and traces of molybdenite, assayed 0.914 ounce gold per ton. A sample of chlorite schist, adjacent to the quartz at the discovery pit, which contained 1% pyrrhotite and pyrite, assayed 1.219 ounces gold per ton. (OFR 5731, p.131-136). 1911: A.L. Parsons, geologist for Ontario Bureau of Mines, mentioned that a shaft was sunk to about 40 feet, and a test pit to 10 feet. A grab sample from the vein yielded 0.128 ounce gold per ton (Parsons 1911). 1984: The best assay from samples taken from the test pit was 0.56 ounce gold per ton over 75 cm. A 76 cm length of core from hole VL-84-1 assayed 0.33 ounce gold per ton (Assessment Files, Resident Geologist's Office, Kenora). 1989: The best assay obtained from chip samples was 0.697 ounce gold per ton over a 1.2 m width.

Mineral Record Details

References

Part - Gold fields of Lake of the Woods, Manitou and Dryden

Publication Number: ARV20-01.006 Page: 188  Date: 1998

Author: Parsons A.L.

Publisher Name: Ontario Bureau of Mines

Location:

Book - Molybdenum deposits of Canada; Geological Survey of Canada, Economic Geology Report 20

Publication Number: EconGeol 20 Page: 72  Date: 1963

Author: Vokes, F M

Publisher Name: Geological Survey of Canada

Location: https://doi.org/10.4095/103994

Article - Geology of the Vista Lake area, districts of Rainy River and Kenora

Publication Number: MP141.019 Page: 138-144  Date: 1997

Author: Smith P.M., Stephenson C.D.

Publisher Name: Ontario Geological Survey

Location:

Mono - Property visits by the Dryden area mineral commodity geologist, 1989

Publication Number: OFR5731 Page: 131-136  Date: 1990

Author: Delisle P.C.

Publisher Name: Ontario Geological Survey

Location:

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.

Terms of Use

Please review our Terms of Use agreement for this data product.

Ministry Contact Information

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