Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI42D09NW00016

Record: MDI42D09NW00016

General

Commodities

Primary Commodities: Gold, Silver

Secondary Commodities: Copper, Zinc, Molybdenum, Lead

Location

Township or Area: Pic

Latitude: 48° 39' 8.72"    Longitude: -86° 17' 43.62"

UTM Zone: 16    Easting: 551890   Northing: 5389058    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42D09NW

Point Location Description: Location of Bowhill trench from map in Assessment file 42D09NW0017

Location Method: Data Compilation

Exploration History

1938: Bowhill Mines Ltd. acquired the property and carried out trenching. 1979-81: V. Stenlund drilled 5 DDH totaling 556.9 m. 1983-84: Lytton Minerals Ltd. carried out VLF-EM and magnetometer geophysical surveys, trenching, sampling, and drilled 24 DDH totaling 1329.8 m including 5 DDH totaling 2605 m on the zone.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Hemlo

Geological Age: Archean  

Lithology

Lithology Comments

Dec 18, 2018 (Therese Pettigrew) - The zone consists of a series of sericite schist units within felsic metavolcanics that trend at 60 degrees across the property. In the moderately foliated sericite schist, 5 to 10% blue quartz-eyes, and up to 2 mm in size, occur. The quartz-eyes are deformed parallel to foliation. In the most strongly foliated sections, quartz-eyes are absent and the narrow quartz-rich layers (<2 mm) contain molybdenite. Drilling and surface exploration has defined five parallel units (Patterson et al., 1986).

Mineralization

Mineralization Comments

Dec 18, 2018 (Therese Pettigrew) - A test shipment of ore sent by Bowhill Mines in 1938 returned an average content of 0.30 opt Au and 1.53 opt Ag from a 500 lb sample. DDH P84-2 returned assays of 0.123 opt Au over 3.6 feet (4.2 gpt Au over 1.1 m) from a carbonate-quartz stockwork. Diamond drilling on the main zone traced the zone for 1.6 km along strike (Assessment file 42D09NW0017). Stripping on the main zone west of the Bowhill Mines occurrence (1100 m west of Highway 627 and the Canadian Pacific Railway) exposes a shear zone which shows evidence of progressive deformation. The earliest phase, largely ductile, during which volcanic fragments within a felsic pyroclastic were being folded and stretched parallel to foliation, was followed by an event in which discrete sericite schist zones, 20 to 100 cm wide and heavily carbonated, cut across the ductile shear. Carbonate pods within the sericite schist are deformed. During this event, a mafic dike, 30 to 60 cm wide, containing fragments of sericite schist, intruded into the sericite schist. This dike is folded as it crosses the sericitic schist zone. The final phase appears to have been brittle deformation, with the formation of quartz-tourmaline veins along the margin of the mafic dike and in the carbonate pods (Patterson et al., 1986).

Mineral Record Details

References

Article - Thunder Bay Resident Geologist area, North Central Region

Publication Number: MP128.004 Scale:     Date: 1997

Author: Patterson G.C., Mason J.K., Schnieders B.R.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Thunder Bay South Resident Geologist District Office