Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52P15SE00004

Record: MDI52P15SE00004

General

Commodities

Primary Commodities: Gold

Location

Township or Area: North Bay Area

Latitude: 51° 47' 25.02"    Longitude: -88° 34' 26.56"

UTM Zone: 16    Easting: 391440   Northing: 5738885    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52P15SE, 52P16SE

Point Location Description: approximate

Location Method: Conversion from MDI

Access Description: Located approx. 1.5 km north of North Bay, Keezhik Lake. Access to Keezhik Lake by float plane from Pickle Lake, Nakina or Armstrong. The occurrence can be reached by claim lines or possibly partially overgrown tail for the north end of North Bay.

Exploration History

1938: V.K. Prest report one grab sample of 0.07 oz Au per ton form quartz stringers in a mineralized porphyry dyke. 1960: 40 claims staked - C. K. Hansen, conducted propecting, sampling, chip sampling, 3 ddh report by Reed (1960). 1986: AM and VLF-EM surveys by Dighem Surveys - Dome Explorations (Canada) Ltd. 1987: Dome Explorations (Canada) Ltd. drilled 1 DDH totalling 136 m. 1988: EM and mag - Placer Dome Inc. 1989: Placer Dome drilled 2 ddh totalling 415 m. 2004-2005: Prospecting, geological mapping and assays by Metalcorp. 2008: MetalCorp flew a high-resolution helicopter-borne EM survey. 2010-11: Landore staked the property and carried out geological mapping, grab, soil, and bark sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Miminiska-Fort Hope

Geological Age: Mesoarchean  

Geology Comments

Oct 06, 2006 (Mark Puumala) - The Keezhik Lake area gold occurrences are located within the northern portions of the Miminiska-Fort Hope Greenstone Belt. This portion of the belt has been interpreted by Stott and Corfu (1991) to be underlain by the rocks of three separate supracrustal rock assemblages. The northernmost assemblage is dominated by mafic volcanic flows containing a banded iron formation marker unit. This assemblage is interpreted to be overlain by a southward facing sequence of massive to pillowed mafic volcanics that also contains a well-defined iron formation marker unit. A third assemblage consisting of mafic volcanics, felsic pyroclastic rocks and a quartz porphyry intrusion overlies the second unnamed assemblage. The Keezhik Lake gold occurrences are located near the boundary between the second and third assemblages. A wide variety of lithologies have been mapped in this area, including mafic metavolcanics, mafic to ultramafic intrusive rocks (gabbro and pyroxenite), banded iron formation, intermediate to felsic pyroclastic rocks with thin interbedded sedimentary layers, and quartz/quartz-feldspar porphyry intrusions (Arnold and MacTavish, 2005). Gold occurrences appear to be hosted within all of these lithologies, with the most significant known occurrence (KL-12) being found in a quartz porphyry stock. The Keezhik Lake gold occurrences are located in close proximity to the North Caribou Lake-Totogan Lake Shear Zone. This is a major regional-scale structure that may have provided a source of gold-mineralized fluids. Osmani and Stott (1988) identified this area as having significant gold potential, especially where splays or horse-tail shear zones may have transmitted fault movement into the greenstone belt. Lithological contacts with competent units such as porphyry intrusions and iron formations (i.e., the setting for many of the known occurrences) are considered to be favourable locations for the development of significant gold mineralized structures.

Lithology

Mineralization

Mineralization Comments

Sep 26, 2019 (Mark Puumala) - The Hansen occurrence is located within a sequence of mafic metavolcanic rocks. According to Arnold and MacTavish (2005), mineralization occurs within a strongly to intensely silicified, carbonatized, chloritized and biotitized zone that contains 5 to 7% finely disseminated pyrrhotite with minor pyrite and chalcopyrite. The mineralized zone is located within a shear zone flanked by massive fine-grained, amphibolitized mafic flows and possibly gabbros. Mineralized veins have been described by Reed (1960) as having an orientation of 285/65 and containing quartz, carbonate, chlorite and up to 7% sulphides. Arnold and MacTavish (2005) further describe the veins at this location as being brecciated and flanked by perpendicular 1 to 5 cm thick sugary quartz veinlets and veins. Channel sample assays of up to 0.66 ounces per ton gold over 0.7 feet were reported from this occurrence by Reed (1960), while Arnold and MacTavish (2005; Assessment report 20000000915) report grab sample assays of up to 16.542 ppm.

Sep 26, 2019 (Therese Pettigrew) - Dome Exploration’s channel sample program returned values of 23.0 gpt Au over 0.70 m, 13.7 gpt Au over 0.50 m, and 11.7 gpt Au over 1.80 m. Sampling by MetalCorp in 2005 returned values of 1.154 ppm up to 12.196 ppm Au (Assessment report 20000000915). Sampling by Landore in 2011 returned values of up to 9.075 ppm Au, 654 ppm Cu, and 140 ppm Zn (Assessment report 20000007086).

Mineral Record Details

References

Map - Fort Hope-Lansdowne House sheet, geological compilation series, Cochrane, Kenora, and Thunder Bay districts

Publication Number: M2237 Scale: 1:253,440    Date: 1972

Author: Thurston P.C., Carter M.W., Riley R.A.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Mono - Mineral Occurrences and Prospects in the Fort Hope-Winisk Area

Publication Number: OFR5926 Scale:     Date: 1995

Author: Mason J.K., White G.D.

Publisher Name: Ontario Geological Survey

Location:

Part - Geology of the Keezhik-Miminiska lakes area

Publication Number: ARV48-06 Scale:     Date: 1998

Author: Prest V.K.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Keezhik-Miminiska lakes area, District of Kenora (Patricia Portion), Ontario

Publication Number: ARM48E Scale: 1:63,360    Date: 1997

Author: Prest V.K.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Operation Fort Hope

Publication Number: MP042 Scale:     Date: 1970

Author: Thurston P.C., Carter M.W.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Map - Operation Fort Hope, Lansdowne House-Fort Hope sheet, districts of Kenora (Patricia Portion) and Thunder Bay

Publication Number: P0562 Scale: 1:126,720    Date: 1997

Author: Thurston P.C., Carter M.W.

Publisher Name: Ontario Dept. of Mines

Location:

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