Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52F07NE00005

Record: MDI52F07NE00005

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Boyer Lake Area

Latitude: 49° 26' 2.99"    Longitude: -92° 42' 9.1"

UTM Zone: 15    Easting: 521568   Northing: 5475764    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52F07NE

Point Location Description: AMIS location and map in Assessment report 20000013606

Location Method: Data Compilation

Access Description: The Gold Rock property is located in the historic Gold Rock Mining Camp, about 35 kilometres ("km") south of the Town of Dryden, or approximately 900 km northwest of Toronto. The abandoned village of Gold Rock, situated at Trafalgar Bay of Upper Manitou Lake, is adjacent to the southwestern comer of the property. The approximate geographical coordinates of the claims are 49° 28' N and 92° 42' W, within NTS 52F/7 quadrangle. Year round access is best achieved by fixed wing aircraft or helicopter charter. Highway 502 connecting Dryden and Fort Francis passes approximately 2.2 km east of the eastern claim boundary. A 6 km long old wagon road connects Gold Rock village to highway 502; however, this un-maintained road is only traversable by all terrain vehicles in the summer, or snowmobiles in the winter. The author used Wilderness Air of Vermillion Bay for mobilization to and from the property . Accommodation was provided by Manitou Lodge located at the site of the old Gold Rock town site . Access to the property grid was either by foot following an old trail for a distance of about 1.5 km to L 5005. Alternatively, a trail leads northeast to a river which flows south from Double Lake. A boat can be taken upriver to the south end of Double Lake, where a short portage provides access to the lake. (Assessment File 52F07 NE III-9, Goldeye Explorations Ltd, 2007, Kenora Resident Geologist Office)

Exploration History

The Gold Rock claim group was prospected in the 1895 to 1912 period; however, very little data from this work is available. 1896: C.W. Mitchell, H.F. Brady, and E.B. Haycock sunk shallow shafts and erected a 2 stamp Tremaine mill. 1928-29: Gold Rock Mining Syndicate Ltd. sunk the shaft to 87 feet with 263 feet of crosscutting. 1974: F.V. Regan drilled two holes totaling 62.5 m. 1939: Kenwest Gold Mines Ltd. acquired the property. 1990: J.W. Redden undertook a stripping campaign. 2009: Manitou Gold Inc. carried out prospecting, mapping, and sampling. 2010: Manitou Gold drilled 24 DDH across their property including 4 DDH totalling 735 m on the Gold Rock and Haymaker zones. 2011-12: Manitou Gold carried out trenching, channel sampling, and drilled 80 DDH totalling 14,670.45 m including 5 DDH totalling 1182.1 m in the area of the showings.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Terrane: Western Wabigoon

Belt: Eagle-Wabigoon-Manitou

Geological Age: Precambrian  

Lithology

Mineralization

Mineralization Comments

Feb 24, 2010 (D Scholtz) - An outcrop of felsic tuff was observed at L 400 S/250 W. It contains 1-5% very finely disseminated pyrite and is moderately foliated at 225°/65°NW. This outcrop correlates with IP chargeability zone IP-2 (JVX, 2004), and it is probably the source of the anomaly. Sample 66465 was collected from this locale. Three small pits (maximum size 3 x 2 metres) over a length of about 12 metres were located at L 315 S/0 +05 W. These pits are aligned at 340° and are now mostly water filled. A small outcrop at the northwest end of the central pit is highly fractured at 210°/80°SE. Rubble around the pits locally comprises semi-massive pyrite in altered basalt (?), with minor quartz veining. Sample 66464 was collected from the mineralized rubble around the trench, and this material represents the explanation for IP anomaly IP-1a'. A small pit was observed at L 400 S/0 + 27 E. The north wall of the pit exposes moderate to highly foliated (055°/75°NW) basalt. Sample 66467 consists of white quartz with local hematite staining and 5-15% pyrite that was collected from the rubble around the trench, but was not observed in the trench. Sample 66468 comprises 10-25% pyrite, disseminated and as stringers in highly altered, bleached and sheared basalt. This material was also collected form the rubble and could not be observed in the trench. This material represents an explanation for IP anomaly IP-1a. Sample 66477 is located slightly west of this IP anomaly at L 425 S/0+15 E, wherein a small trench exposes semi-massive (30-40%) pyrite over a true width of about 1 metre. This material is undoubtedly associated with the anomalous IP responses located in this area as well. An outcrop of fine-grained basalt at L 0+20 S/185 E contains up to 5% disseminated pyrite. Another outcrop located at L 300 S/130 E also comprises basalt with up to 5% disseminated pyrite.

Apr 30, 2020 (Therese Pettigrew) - The Haymaker Zone is the SW extension of the Gold Rock showing. DDH KW-11-73 returned 1.145 ppm Au over 0.65 m from a felsic dyke with quartz veins and 1-2% disseminated pyrite (Assessment report 20000013606). DDH KW-10-16 assayed up to 0.8 g/t Au. DDH KW-10-18 assayed up to 1.18 g/t Au over 1.0 m from a sheared and altered quartz porphyry dyke with 2-3% disseminated pyrite (Assessment report 20000009003). The rocks in the vicinity of the mine are chiefly altered quartz diorite with lesser amounts of andesite and agglomerate. It is impossible to state whether the quartz diorite is a coarse-grained phase of a lava or an intrusive. About 400 feet west of the mine buildings there is a small mass of intrusive granite. At the shaft the vein is covered by the dump and mine timbers, but it is exposed in a pit east of the dump and may be traced a distance of 25 feet to the lake shore. The vein, which is 1.5 feet wide, is well defined and consists of white quartz with a little green schist, which carries some pyrite and a trace of chalcopyrite. Native gold was observed in the quartz at the lake shore. A sample chipped across the vein in the pit assayed $2.20 per ton in gold (0.08 oz/t Au or 2.74 g/t Au based on $26.33 gold). A second vein occurs 125 feet west of the shaft. This has a general strike of N40E. and dips 65 degrees SE. The vein ranges from 2 to 8 feet in width and may be traced about 200 feet from the lake shore. It consists of rather sugary quartz and a little included schist, and contains only a trace of sulphides. A representative sample taken across the width of the vein in a test pit gave no gold values. A few other small lenses of quartz occur on the property (Thomson, 1933).

Mineral Record Details

References

Part - Third report on the west Ontario gold region

Publication Number: ARV06.002 Scale:     Date: 1998

Author: Coleman A.P.

Publisher Name: Ontario Bureau of Mines

Location:

Mono - Gold deposits of Ontario, part 1, districts of Algoma, Cochrane, Kenora, Rainy River, and Thunder Bay

Publication Number: MDC013 Scale:     Date: 1971

Author: Ferguson S.A., Groen H.A., Haynes R.

Publisher Name: Ontario Dept. of Mines and Northern Affairs

Location:

Part - Mines of Ontario in 1928

Publication Number: ARV38-01.003 Scale:     Date: 1997

Author: Sinclair D.G., Cleland R.H., Keeley E.C., Jarrett G.S., Webster A.R.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Geology of the Boyer Lake-Meggisi Lake area, District of Kenora

Publication Number: OFR5263 Scale:     Date: 1979

Author: Blackburn C.E.

Publisher Name: Ontario Geological Survey

Location:

Part - Mines of Ontario in 1929

Publication Number: ARV39-01.003 Scale:     Date: 1997

Author: Sinclair D.G., Cleland R.H., Keeley E.C., Cooper D.F., Webster A.R.

Publisher Name: Ontario Dept. of Mines

Location:

MonoMap - Geology of the Boyer Lake-Meggisi Lake area, District of Kenora

Publication Number: R202 Scale:     Date: 1981

Author: Blackburn C.E.

Publisher Name: Ontario Geological Survey

Location:

Part - Geology of the Manitou-Stormy lakes area

Publication Number: ARV42-04.001 Scale:     Date: 1998

Author: Thomson J.E.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Mines of Ontario

Publication Number: ARV15-01.003 Scale:     Date: 1998

Author: Corkill E.T.

Publisher Name: Ontario Bureau of Mines

Location:

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