Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52E10SW00006

Record: MDI52E10SW00006

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Silver

Location

Township or Area: Glass

Latitude: 49° 35' 16.06"    Longitude: -94° 57' 19.91"

UTM Zone: 15    Easting: 358662.59   Northing: 5494638.29    UTM Datum: NAD83

Resident Geologist District: Kenora

NTS Grid: 52E10SW

Point Location Description: Precise

Location Method: Conversion from MDI

Access Description: The site is located in Glass township, approx. 4 km south of Clytie Bay Landing. The site is reached by boat from Clytie Bay landing or from Kenora via Ash Rapids. The main shafts and buildings are on mining location D148, 1.4 km east of Cedar Island.

Exploration History

1885: prospecting. 1893: The Mikado Mine on claim D148 was discovered. 1895: the South African General Development Syndicate Ltd. examined the property and purchase was made by a newly incorporated Mikado Gold Mining Company Ltd. Shafts were sunk in 1896 and production from 1896 to 1902 totalled 946,800 grams of gold from 57,813 tonnes. The mine reopened and operated during the years 1910-11, and 1922-23. 1932-34: The property was acquired by Kenora Prospectors and Miners Ltd. The mine was dewatered and some exploratory drifting and diamond drilling was done, but no ore was mined. 1980-81: Denison Mines Ltd. optioned the property and completed ground geophysics, minor trench sampling and 1318 metres of diamond drilling in 13 DDH. 1985: St. Joe Canada Inc. optioned the property from Kenora Prospectors and Miners (KPM). 1987-88: Bond Gold Canada Inc. (formerly St. Joe Canada) carried out geological mapping, sampling, geophysical surveys, and drilled 127 DDH totalling 27,288 m. 2004: Amador Gold Corp. drilled 35 DDH totalling 10,011 m, mainly on the eastern side of the Cedar Island deposit, but included 5 DDH south of the Mikado deposit. 2013: Cougar Metals optioned the property from Kenora Prospectors & Miners. 2015: Kenora Prospectors & Miners revoked the option agreement.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Geological Age: Archean  

Geology Comments

Feb 09, 2011 (C Ravnaas) - The Shoal Lake area is underlain by granite-greenstone terrain of the western portion of the Wabigoon Subprovince, a major sub-division of Precambrian rocks of the Canadian Shield. The greenstone rocks consist of fine to medium grained mafic-ultramafic to intermediate metavolcanics of basaltic and andesitic composition with minor tuffaceous and sedimentary interbeds. The volcanics have been intruded by the Canoe Lake Stock of granodioritic composition. The KPM Property is dominated by a north trending alternating sequence of fine- to medium grained, massive and pillowed mafic flows and medium- to coarse-grained sills or very thick flows. These units have been folded about the northeast trending Gull Bay - Bag Bay Anticline, the axial trace of which extends just to the east of Cedar Island. A major granitic body covers the eastern margin of the property. The Canoe Lake quartz diorite stock occupies an anticlinal position and faulting has modified its boundaries. It is typically fractured, altered and quartz-rich, and several types of porphyry dikes are associated with it. It lies on the extension of the Gull Bay-Bag Bay Anticline; it may be a high level intrusion, and the extensive fracturing and alteration may be due to late stage hydrothermal activity. There are two major directions of faulting on the property; one fault set trends 030°to 045° NE and the other set trends 090° and 110° to 125° SE. Northeast faulting is parallel to the strike of the lithologies and is widespread, but difficult to recognize. It has undoubtedly been a controlling factor influencing gold deposition at the Mikado Mine. The best-developed fault sets are those, which strike about 090° and 110° to 125°SE. (Reference from Everton Resources Ltd. Technical Report on RESOURCE UPDATE ON THE KPM SHOAL LAKE PROJECT Mar 2010)

Lithology

Lithology Comments

Feb 09, 2011 (C Ravnaas) - The Mikado Mine Veins are examples of deposits occurring in mafic volcanic rocks near the margin of the Canoe Lake intrusion and represent the type of structural setting referred to above as “veins in faults and shear zones”. These shear zones have moderate to steep dips, and can be traced for several hundred metres to a few kilometres along strike. They are typically high-angle reverse to reverse-oblique shear zones and form tabular to lenticular bodies. The veins range in thickness from a few tens of centimetres to a few metres and may reach a few hundred metres in their longest dimension. The Mikado veins form a left-stepping en-echelon set, with each segment 8 to 10 metres long and up to 0.4 metres wide. The Mikado No. 1 contains angular fragments of wall rock, which are separated by quartz vein material. The veins trend from 155° to 180°S and were emplaced as a result of flexural shearing of units along lithological contacts where competency contrasts occurred in response to the intrusion of the Canoe Lake stock. The Mikado No. 2 vein is glassy to smokey-grey in appearance with quartz accounting for 90% of the vein material. Within the veins, quartz is ribboned and gossanous. Pyrite, bismuthinite and arsenopyrite collectively account for up to 5% of the vein material. Carbonate, limonite and fuchsite are present in the altered wall rock. The Mikado veins differ in character from the Cedar Island Mainland Zone veins in the following aspects: (1) Mikado veins contain coarse native gold as compared to the sulphide-associated micron gold observed at the CIMZ, (2) Mikado veins contain the mineral bismuthinite and show brecciated inclusions of wall rock altered to fuchsite, (3) Mikado veins have historically produced higher grade mineralization than the CIMZ. (Reference from Everton Resources Ltd. Technical Report on RESOURCE UPDATE ON THE KPM SHOAL LAKE PROJECT Mar 2010)

Mineralization

Mineralization Comments

Feb 09, 2011 (C Ravnaas) - The Mikado Mine on claim D148 was discovered in 1893. Shafts were sunk in 1896 and production from 1896 to 1902 totalled 946,800 grams of gold from 57,813 tonnes. The mine reopened and operated during the years 1910-11, 1922-23 and 1932-34. An additional 24,549 grams of gold were produced during these years primarily from the 4th, 7th, 9th and 10th levels to a vertical depth of 165 metres. (Reference from Everton Resources Ltd. Technical Report on RESOURCE UPDATE ON THE KPM SHOAL LAKE PROJECT Mar 2010)

Jan 13, 2020 (Therese Pettigrew) - This mine lies on the mainland 3/4 mile east of Cedar Island. The bulk of the production came from No. 1 Vein which was mined separately from the No. 2 Vein. The latter vein lies 500 feet east of and roughly conformable to the northwest striking, east dipping No. 1 Vein. The veins occupy conformable fractures in fine-grained andesite. The fractures continue through acid intrusives derived from the Canoe Lake Quartz Diorite stock to the ENE. Most of the ore mined in No. 1 Vein occur in and near the hanging wall side of an east-west striking, south dipping apophysis of granodiorite extending west from the main quartz diorite stock. No. 2 Vein also occurs in part in the granodiorite (Assessment report 52E10SW8559). The No. 1 Vein has been traced on surface, by diamond drilling, and underground workings for a distance of over 4,000 feet. The vein is considered a true fissure type but is accompanied by some shearing. It averages from 4 to 5 feet in width and locally may widen to over 10 feet. It strikes N30W and dips 85 degrees to the east. In 1911, the average ore grade was estimated at 0.40 ounces gold per ton. Accurate estimates would have been difficult because of the numerous rich occurrences of free gold. The depth of the main workings on the No. 1 Vein is about 560 feet. It was mined from two shafts, an incline 1125 feet long and a vertical shaft to the 9th (504 foot) Level. There are 10 levels on the vein. The No. 2 Vein is about 400 feet east of the No. 1 Vein and is almost parallel in strike, showing a slight convergence to the northwest. A 240 foot shaft was sunk on the vein and two levels were established, a limited amount of mining was done. The vein occurs in a green carbonate rock (locally named Mikadoite) which lies along the quartz diorite-greenstone contact. Widths of the vein on the 240 foot level are reported to be from 2 to 5 feet. On surface, 100 feet south of the shaft it is from 2 to 8 inches wide, but carries considerable free gold. Free gold was also found in the green carbonate on the shaft dump. (Assessment report 52E10SW8558). The Granozone mineralized structure, located 60 metres east and sub-parallel to the Mikado No. 2 Vein was discovered through Denison’s diamond drilling in 1981. Drilling returned gold values up to 10.54 grams per tonne gold over 2.4 metres and 72.0 grams per tonne gold over 0.9 metres (Giroux and Leonard, 2010). Gold has been reported in the clay under part of Bag Bay adjacent to the Mikado mine. Clay, in places showing distinct layers of varves, mantles much of lower ground in the area and was deposited while the area was covered by glacial Lake Agassiz. The mud, which is said to overlie the clay under Bag Bay, presumably resulted from wave washing by the retreating glacial lake and by the action of the present Shoal Lake. Some locally-derived clastic material, including some fine gold, was undoubtedly mixed with the clay, though it would not be expected that the total gold content would be significant. Fifteen holes are reported to have been drilled from the ice on location D 201A in 1899. Samples of clay were assayed; results indicated that gold is erratically distributed in the clay but that, in an area close to the south end of the bay, the total gold content may be appreciable (Davies, 1978).

Mineral Record Details

References

Publication - A Resource Update on the KPM Shoal Lake Project

Publication Number: 2010 NI 43-101 Date: 2010

Author: Giroux, G.H., Leonard, K.W.

Publisher Name: Everton Resources

Location: SEDAR

MonoMap - Geology of the Shoal Lake-Western Peninsula area, District of Kenora

Publication Number: OFR5242 Page: 63-65, 87-90  Date: 1978

Author: Davies J.C.

Publisher Name: Ontario Geological Survey

Location:

Mono - The geological setting of gold occurrences in the Lake of the Woods area

Publication Number: OFR5695 Page: 220-228  Date: 1988

Author: Davies J.C., Smith P.M.

Publisher Name: Ontario Geological Survey

Location:

MonoMap - Geology of the Shoal Lake-Western Peninsula area, District of Kenora

Publication Number: OFR5242 Page: 99-100  Date: 1978

Author: Davies J.C.

Publisher Name: Ontario Geological Survey

Location:

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

Publication Number: MDC016 Page: 27  Date: 1976

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

Publisher Name: Ontario Division of Mines

Location:

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