Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31M05NE00045

Record: MDI31M05NE00045

General

Mineral Record Identification
Record Name(s)	Crown Reserve Mine - 1907, Agnico-Eagle - 1957, Carson Vein - 1907, Kerr Lake Lease - 1946, Medusa Mines Ltd. Lease - 1947
Related Record Type	Partial
Related Record(s)
Record Status	Past Producing Mine Without Reserves or Resources
Date Created	1980-Oct-02
Date Last Modified	2023-Aug-24
Created By
Revised By

Commodities

Primary Commodities: Silver, Cobalt

Location

Township or Area: Coleman

Latitude: 47° 22' 31.87" Longitude: -79° 39' 33.35"

UTM Zone: 17 Easting: 601213 Northing: 5247767 UTM Datum: NAD83

Resident Geologist District: Kirkland Lake

NTS Grid: 31M05NE

Point Location Description: Crown Reserve Shaft

Location Method: AMIS Site Visit

Access Description: From highway 11b turn southeast on Coleman Road, which joins Kerr Lake Road, for 3.7km to the Agnico Penn Shaft turnoff; continue east (past the Canadaka Mill). From this turn off for 150m; go north 150m along old road/trail to the edge of Kerr Lake.

Exploration History

1907-1921: Crown Reserve Mining Co. Ltd. – exploration, in production; shaft development to 300 ft, winze to 460 ft (Crown Reserves Shaft); North Shaft is 500 ft. 1924-1927: Carl Reinhardt – worked under a lease with Crown Reserve, leasing continued until 1940. 1946: Messrs Price, Russell and Todd – property leased. 1947-1951: Medusa Mines Limited – property leased. 1951-53: Penn-Cobalt Silver Mines Ltd. – shaft dewatered, new headframe constructed, dewatering. 1953-55: Cobalt Consolidated Mining Corporation Limited – exploration and mining.

Geology

Province: Southern

Subprovince: Cobalt Basin

Supergroup: Huronian Supergroup

Formation Group: Cobalt Group

Geological Age: Paleoproterozoic

Lithology

Lithology Data
Rock Type	Rank	Composition	Relationship
Sandstone	1	Greywacke	Host
Conglomerate	2	Conglomerate	Host
Vein	3	Calcite	Contains
Lamprophyre-Unsubdivided	4		Intrudes

Lithology Comments

Feb 12, 2015 (A Wilson) - The Nipissing diabase exposed on the north side of the claim is part of the northerly dipping south limb of thePeterson Lake diabase basin. The dip (about 45° N.) of the bottom contact of the diabase is steeper than the Cobaltseries-Keewatin contact (dipping about 20°N.)j in consequence the diabase (overlying directly Cobalt Series sediments from surface to a depth of some 200-300 feet) is below this in contact with Keewatin. The Keewatin rocks in the western part of the property consist of andesitic volcanics with interflow chert beds; in the eastern part of bedded sediments. The bedded sediments, exposed only in the underground workings below the Cobaltseries are believed to be the westerly extension of the Keewatin sediments exposed at surface on the adjoiningDrummond property. Knight notes the occurrence of large lamprophyre and quartz gabbro intrusives in the Keewatin. Important faulting transecting the Cobalt series or Nipissing diabase has not been recognized: if such occurred presumably displacement of the contacts would have been noted. A zone of faulting lies parallel and in proximity to the bottom diabase contact but the direction of movement or displacement is not known.

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking	Alteration Intensity	Alteration Style
1	Silver	Economic	Ore
2	Smaltite	Economic	Ore

Mineralization Comments

Feb 12, 2015 (A Wilson) - The property contained four significant veins. These were the Carson Vein (9,211,279 oz); No.17 Vein (2,821,000 oz), Ross Vein (2,727,500 oz) and the Gear Vein (2,463,000 oz). The average grade of silver between 1908-1916 was 346 oz/t. S. W. Cohen, one time manager for the company, stated that a section of the Carson vein 286 feet long and 150 feet deep yielded 9,100,000 oz. silver in high grade ore alone or an average of 217 ounces per square foot of vein area. The silver won from the Carson vein was obtained largely from where the host rock was Cobalt Series sediments: the vein structure was followed downward for some 400 feet into the Keewatin below the Cobalt series but stoping was done only for 200 feet below the contact. Although information is scanty it would appear that cobalt ore was more abundant than silver in the lower workings. The North vein is reported to have yielded a silver production of 100,000 oz., a considerable part of which was obtained from where it 'traversed Keewatin rocks. In these it is said to have followed a fault striking N.85OW. and dipping 70 °S. The vein was followed downward for some 450 feet below the Cobalt series-Keewatin contact and in one place at least, at 350 feet below this contact, carried high grade silver with cobalt mineralization. In upward extension the vein continued into the Cobalt series but not into the over lying Nipissing diabase. Apparently no vein in the diabase on this property has been productive although the vein structure and gangue in some (as No.17) extend into it.

Mineral Record Details

Classification
Rank	Classification
1	Vein (Cobalt-Type)

Characteristics
Rank	Characteristic
1	Stratabound

Production Data
Year	Tonnes	Commodities	Reference	Comment
1948	82747	Silver 632187559 Cobalt 15292	MDC010, p.126-127 15,279 kg Co, 20,325,302 oz Ag	Total Production 1908-1948 (intermittent)

References

File - Resident Geologist file CO-0642

Publication Number: Date:

Author:

Publisher Name:

Location: Kirkland Lake RGP office

Map - Cobalt silver area, southeastern sheet, Timiskaming District

Publication Number: M2052 Scale: 1:12,000 Date: 1997

Author: Thomson R.