Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000000138

Record: MDI000000000138

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Rich Lake Area

Latitude: 51° 37' 10.18"    Longitude: -88° 2' 1.93"

UTM Zone: 16    Easting: 428425   Northing: 5719225    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52P09SE

Point Location Description: Location obtained from assessment file map.

Location Method: Data Compilation

Exploration History

Exploration in the Fort Hope Area began in the 1920s with the discovery of the Fort Hope Gold Mine by prospectors in 1927. Shortly after, additional gold showings were uncovered, including at the Rich Lake Patricia showing. 1929: Mapping - Burwash (1930). 1942: Mapping - Prest (1944). 1969: Thurston and Carter completed an ODM helicopter reconnaissance survey of the Fort Hope Area. 1978: Wallace completed a detailed mapping program of the Opikeigen Lake area for the Ontario Geological Survey. 1981: Extensive sampling of existing trenches. 1984: Detailed geological mapping and grid-controlled rock geochemistry. 1985; ground MAG, VLF-EM - Kerr Addison Mines. 1986: 2 DDH, Aerodat Ltd. Flew a combined airborne MAG, EM - VLF-EM - Kerr Addison Mines. Noramco Exploration Ltd. began a 3 year exploration program on behalf of Pure Gold Resources Inc. and Golden Lake Inc. (later Ella Resources). Noramco completed extensive ground and airborne geophysical surveys, geological mapping and a 5 DDH program. 1987: Noramco completed IP and HLEM-surveys as well as a 12 DDH program totalling 2643.9 m which led to the discovery of the Zones 12 and 29 gold occurrences. Prospecting along trend led to the discovery of the Zone 41 occurrence.1988: Noramco did a magnetometer survey, a humus geochemical survey, airborne RM-VLF survey, trenching, channel sampling, prospecting and geological mapping. A 34 DDH program totalling 6259.5 m was completed, 50% of which were on Zones 12, 29 and 41. 1989: A 6 DDH program totalling 908.4 m was completed, targeting Zones 12, 29, and 41. 1997-9: SLAM Exploration (on behalf of Pure Gold and Ella Resources) conducted an exploration program including a VLF-EM survey, mag survey, rock and soil sampling, geological mapping, and prospecting. 2000: SLAM drilled 6 DDH totalling 1242.5 m, 2 of which were on Zone 12 and 1 was on Zone 29. 2003: Airborne survey was released by the province of Ontario under Operation Treasure Hunt. 2011: Slam and Beatrix Ventures contracted Geotech Airborne Solutions to fly a helicopter borne magnetic gradiometer geophysical survey.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Miminiska-Fort Hope

Geological Age: Archean  

Geology Comments

Sep 27, 2006 (Mark Puumala) - The Zone 41 extension is described by Lemaitre (1997) as a surface occurrence that consists of two mineralized quartz veins that are hosted in sheared gabbro. The veins are oriented approximately 270/45, and are likely to represent an eastern extension of Zone 41 (approximately 400 m away), where a similar vein system has been documented. The north vein ranges from 2 to 15 cm wide, is exposed over a strke length of 20 m, and consists of blue-grey quartz with trace molybdenite. The southern vein is 10 to 30 cm wide, and occurs in a 1.5 m wide shear zone. The northern boundary of this shear is defined by a 30 cm wide quartz-feldspar porphyry dike. The vein, dike and shear foliation are reported to be complexly folded near the eastern edge of the outcrop exposure.

Lithology

Mineralization

Mineralization Comments

Sep 27, 2006 (Mark Puumala) - The most significant assay reported from this occurrence is 0.77 g/t from a 1 m channel sample collected by Noramco Explorations in 1988.

Aug 18, 2014 (Therese Pettigrew) - Samples obtained from the 10-15 cm wide quartz vein with trace molybdenite at Zone 41 Extension assayed 195 ppb and 468 ppb Au. A channel sample collected by Noramco in 1988 returned an assay value of 0.77 g/t Au over 1.0 m. A sample collected by Slam during the 1997 campaign of ankerite-altered porphyry assayed 163 ppb Au (Lemaitre, 1997 AFRI 52P09NE2001).

Mineral Record Details

References

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

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

Map - Geological Compilation of the Miminiska-Fort Hope Area, Eastern Uchi Domain

Publication Number: P3611 Scale: 1:250,000    Date: 2009

Author: Madon Z.B., McIlraith S.J., Stott G.M.

Publisher Name: Ontario Geological Survey

Map - Fort Hope area, District of Kenora (Patricia Portion), Ontario

Publication Number: ARM51B Scale: 1:63,360    Date: 1997

Author: Prest V.K.

Publisher Name: Ontario Dept. of Mines

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