Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI53B02NW00004

Record: MDI53B02NW00004

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Kecheokagan Lake Area

Latitude: 52° 12' 11.2"    Longitude: -90° 45' 29.33"

UTM Zone: 15    Easting: 653197.245   Northing: 5785998.071    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 53B02NW

Point Location Description: Precise

Location Method: Conversion from MDI

Exploration History

1962-65: Geological and geophysical surveys, diamond drilling by Rio Tinto Canadian Exploration Limited. 1976: Diamond drilling by Dome Exporation (Canada) Limited. 1981: Geological mapping and geochemical surveys by Norcen Energy Resources Limited. 1996: Geological mapping and prospecting by Placer Dome Canada Limited.

Assessment Work on File

Geology

Province: Superior

Subprovince: Berens River

Terrane: North Caribou

Geological Age: Archean  

Lithology

Mineralization

Mineralization Comments

Mar 07, 2008 (Mark Puumala) - Sage and Breaks (1982) describe the Shear Zone occurrence as a 055-striking rusty, pyritic shear zone that parallels a 1.5 m wide quartz-feldspar porphyry dike. Talbot (1996a) reported that the shear and dike are hosted within tholeiitic basalts, and that the mineralized zone is approximately 3 m wide. Mineralization in the shear zone is reported by Sage and Breaks (1982) to be largely confined to narrow shear-parallel quartz veinlets, and consists of less than 5% disseminated pyrite. Several anomalous gold assays have been reported from this zone since it was initially explored by Rio Tinto Canadian Exploration between 1962 and 1965. McWilliams, Gillan and Smith (1981) reported that Rio Tinto obtained assays of 0.02 oz/ton Au and 0.18 oz/ton Ag from a chip or channel sample collected across a 30 cm wide portion of the zone. During a four hole diamond drilling program (AFRI# 53B02NW0007), Rio Tinto reported occurrence-grade gold assays in drill hole numbers 1, 2 and 3, with the most notable result being 0.055 oz/ton Au over 0.73 m in drill hole No. 1. It should be noted that assay values of up to 0.1 oz/ton were initially reported for samples collected from drill hole No. 3. However, repeat assays for the samples reported to contain the highest gold values only returned trace amounts of gold. Later diamond drilling of this zone by Dome Exploration in 1976 (see AFRI# 53B02NW0002 and McWilliams, Gillan and Smith 1981) also returned occurrence-grade assays from three drill holes (S-2, S-3B and S-6), with the most notable result being 0.06 oz/ton over 2 m from schistose gabbro mineralized with 15% pyrite + pyrrhotite and 5% arsenopyrite (McWilliams, Gillan and Smith 1981). Sage and Breaks (1982) reported a surface grab sample assay of 0.08 oz/ton Au, while Talbot (1996a) reports surface grab sample assays of up to 1.0 g/t Au at the contact of the quartz-feldspar porphyry.

Mineral Record Details

References

MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay

Publication Number: R207 Date: 1982

Author: Sage R.P., Breaks F.W.

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 Thunder Bay North Resident Geologist District Office