Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000000137

Record: MDI000000000137

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Rich Lake Area

Latitude: 51° 37' 1.92"    Longitude: -88° 2' 21.24"

UTM Zone: 16    Easting: 428050   Northing: 5718975    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52P09SE

Point Location Description: Point 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. 2008: SLAM drilled 9 DDH totalling 910.7 m; 2 holes were on Zone 12 and 7 were on the Fort Hope Gold Mine. 2010: 4 DDH totalling 1148.92 were drilled on Zone 12. 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 prospect is reported by Lemaitre (1997) to be hosted in an altered and sheared gabbro intrusion. Mineralization is generally associated with quartz veins in approximately shears oriented approximately 264/45. Subordinate veins interpreted to be related to the main ones generally strike 060 and 110. The mineralized veins at this location consist of sugary white to blue-grey quartz with 5% chlorite, 0-5% tourmaline, 0-1% molybdenite and 0-1% pyrite. Trace sphalerite has also been reported in the veins. Veins up to 40 cm thick were reported during drilling, while the main surface exposure ranges from 3 to 20 cm thick. Alteration within the sheared gabbro is described as green, white and brown streaks of chlorite, carbonate and biotite.

Lithology

Mineralization

Mineralization Comments

Sep 27, 2006 (Mark Puumala) - Gold assays greater than 1 g/t were obtained from three diamond drill holes that were advanced at this location by Noramco Explorations in 1988 and 1989. The highest reported assay was 6.73 g/t Au over 0.4 m in OL-88-412, while a grade of 1.645 g/t Au over a wider interval of 3.2 m was reported from a deeper portion of the same drill hole. Drilling indicates that the mineralized zone extends for a strike length of at least 65 m.

Aug 18, 2014 (Therese Pettigrew) - Samples collected from opposite ends of the main quartz vein observed in outcrop in Zone 41 contained trace-1% molybdenite and assayed 934 ppb Au and 924 ppb Au. Noramco reported that two grab samples obtained in 1987 assayed 5.83 g/t and 12.48 g/t Au. A grab sample collected by Noramco in 1988 assayed 4.515 g/t Au (Lemaitre, 1997 AFRI 52P09NE2001).

Mineral Record Details

Mineral Zones - Size and Shape

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 - Precambrian Geology, Opikeigen Lake Area

Publication Number: P3269 Scale: 1:20,000    Date: 2005

Author: Hall L.A.F.

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

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