Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F03NE00005

Record: MDI52F03NE00005

General

Commodities

Primary Commodities: Gold, Copper

Secondary Commodities: Silver

Location

Township or Area: Napanee Lake Area

Latitude: 49° 11' 48.36"    Longitude: -93° 7' 16.47"

UTM Zone: 15    Easting: 491167   Northing: 5449337    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F03NE

Point Location Description: AMIS shaft location

Location Method: Data Compilation

Access Description: The occurrence is located 68 km south-southwest of Dryden, on a peninsula on the northwest shore of Neilson Lake. Access to the occurrence is via float plane. Two pits and one shaft are located within 9 metres of the shore line.

Exploration History

1902-1903: A shaft was sunk by Gold Standard Mining Co. to a depth of 28.9 metres at about 10 m of the quartz vein having a width of 1 to 8 feet. At a depth of 24.5 metres, 33.5 metres of crosscutting was done. 1989: Canhorn Mining Corporation optioned the property from R. Fairservice. The company conducted airborne magnetic and electromagnetic surveys and did geological mapping and prospecting. 2004: Temex Resources Corp. carried out mapping, prospecting, channel sampling, and soil sampling. 2011: Neilson Lake Exploration Inc. carried out a magnetic survey, line cutting, and prospecting. 2014: prospectors P. Gehrels and A. Onchulenko carried out prospecting and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Western Wabigoon

Belt: Eagle-Wabigoon-Manitou

Geological Age: Precambrian  

Geology Comments

May 04, 2022 (Therese Pettigrew) - The Gold Standard property lies within the Archean Manitou - Stormy Lakes greenstone belt, an 80 kilometer by 20 kilometer assemblage of northeast-trending mafic, intermediate, and felsic metavolcanic rocks, related intrusive rocks and metasediments which have been intruded by Archean granitoid stocks and batholiths (Blackburn et al., 1990). Structurally, the belt is dominated by the northeast-striking Manitou Straits fault ("MSF"), which extends southwest from Lower Manitou Lake (Manitou Stretch) through the Manitou Stretch area where it connects with the southeastern extent of the Pipestone-Cameron deformation zone. The fault zone is spatially associated with all three properties of the Manitou Project (Gold Standard, Aronson, and High Valley). The Gold Standard property is centrally located on Neilson Lake, northwest of the MSF, and is underlain entirely by intermediate to mafic volcanic flows and pyroclastic rocks of the Grant Lake group (Assessment report 52F03NE2001).

Lithology

Lithology Comments

Feb 18, 2010 (C Ravnaas) - The occurrence is underlain by felspar-phyric mafic metavolcanic flows, and mafic lapilli-tuff, that have been sheared, to produce chlorite-sericite-carbonate schist. Schist included in the quartz vein is locally silicified and pyritized. The schistosity strikes about 025° and dips 78° to the southwest. The shear zone is very subtle, and strikes 45°, dipping 53° to the southwest. The quartz vein strikes 050°, and dips to the northwest at about 40°. An extension vein occurs under shallow water close to the shoreline, striking at 115°. These structural observations suggest a dextral, north-side-down, oblique-slip component of movement in the shear zone. The opaque quartz-carbonate vein is white to light grey in colour, and has a ribbon texture defined by tourmaline and ankerite layers. The vein consists of contorted veins and veinlets over a width of 1.5 to 2.5 m. The quartz veins are exposed over a 35 m length. The mineralization in the quartz material consists of trace amounts of disseminated pyrite. Locally, massive chalcopyrite occurs within quartz stringers, with <1% pyrite and bornite. The schist included in the quartz material consists of 1-5% disseminated pyrite. The best analysis from 5 grab samples was 2640 ppb gold (Table 11). Analytical results suggest correlation between amounts of gold and total sulphide. (OFR 5731, p. 79 - 84)

Mineralization

Mineralization Comments

Feb 18, 2010 (C Ravnaas) - One assay of 1.8 ounces gold per ton is reported from the mine dump (Beard and Garratt 1976). (MP 141, p.145) 1988: A selected grab sample collected by the Ontario Geological Survey field crew from a quartz vein at the Gold Standard Occurrence on Neilson Lake and analyzed by the Geoscience Laboratories, Ontario Geological Survey, Toronto, returned 1.37 ounces gold per ton, 0.85 ounce silver per ton (29 g/t silver), and 1.52% copper during a regional mapping survey. (MP 141, p. 145)

May 04, 2022 (Therese Pettigrew) - The earliest recorded work on the Gold Standard property includes shaft sinking by Gold Standard Mining Co. between 1902-1903 (Carter, 1904). A 1.8 x 2.7 meter shaft was sunk to 29 meters. No reports of grade were made at that time, but comments were made on extreme width variation from 0.3 to 2.4 m. The site was visited again several times by government geologists, including Thomson (1934), Beard and Garratt (1976), and Berger (1988), who obtained relatively high grade values from samples of sulphide rich vein material ranging up to 55.9 g/t Au, 29 g/T Ag, and 1.52% Cu. The occurrence is underlain primarily by intermediate volcanic flows and pyroclastics that have been sheared and are now represented by chlorite-sericite-carbonate schist. The showing is a quartz vein array with minor tourmaline and ankerite and local clots of pyrite+chalcopyrite. The thickest part of the vein occurs over a width of l .5 m in one of two glory hole type pits (shallow shafts sunk directly on the vein rather than in the footwall) and it can be traced to the north along strike for approximately 35 metres where it thins out significantly and extends into the lake. The main vein bifurcates into <1 m wide veins within about 5 meters of main pit to the north and either pinches out or is not exposed to the south. Sulphides occur as clots of pyrite +/- chalcopyrite ranging up to 10 cm in diameter within the vein or at their margin. The wallrock to the vein contains variable chlorite and calcite alteration up to 20 cm away from the vein. Sporadic disseminated pyrite and rarely chalcopyrite occur along fractures within 10 cm of the vein contacts. Sample 364104 - 450 g/T Au - is a grab of a 2x3cm blob of chalcopyrite-pyrite along the margin of one of the veins located approximately 5m along strike from the main exposure of the vein in the pit. It was taken to test the sulphides to see if the gold was tied up with them. Sample 364105 -113 g/T Au - is a 1.2m chip that includes the vein margin with the same sulphides and the high gold grade appears to be due to the sulphides along the west edge of the vein. Sample 364112 - 3 g/T Au - is probably the most representative of the mineralizing system. It is a 1.2 m channel with minor chalcopyrite along the margin (one of the few) and is probably the most representative of the system, providing comparable sulphide distribution can be found throughout the rest of the vein array (Assessment report 52F03NE2001). In 2014, two samples were taken. The first was quartz with 10-15% chalcopyrite and assayed 2.7 g/t Au. The second was quartz with 15-205% euhedral pyrite and 10% chalcopyrite and assayed 200 g/t Au (Assessment report 20000014839).

Mineral Record Details

References

Part - Mines of western Ontario

Publication Number: ARV13-01.005 Page: 68  Date: 1998

Author: Carter W.E.H.

Publisher Name: Ontario Bureau of Mines

Location:

Part - Geology of the Straw-Manitou lakes area

Publication Number: ARV43-04 Page: 21  Date: 1998

Author: Thomson J.E.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Gold deposits of the Kenora-Fort Frances area, districts of Kenora and Rainy River

Publication Number: MDC016 Page: 19  Date: 1976

Author: Beard R.C., Garratt G.L.

Publisher Name: Ontario Division of Mines

Location:

Article - Geology of the Manitou Stretch area, District of Kenora

Publication Number: MP141.020 Page: 145-148  Date: 1997

Author: Berger B.R.

Publisher Name: Ontario Geological Survey

Location:

Mono - Property visits by the Dryden area mineral commodity geologist, 1989

Publication Number: OFR5731 Page: 81-84  Date: 1990

Author: Delisle P.C.

Publisher Name: Ontario Geological Survey

Location:

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For detailed information regarding this mineral record please contact the Kenora Resident Geologist District Office