Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31M05NE00047

Record: MDI31M05NE00047

General

Mineral Record Identification
Record Name(s)	Kerr Lake Mine - 1905, Glen Lake Silver Mines Ltd. - 1940, Kerr Lake Lease (HiHo Silver Mines) - 1948
Related Record Type	Partial
Related Record(s)
Record Status	Past Producing Mine Without Reserves or Resources
Date Created	1984-Nov-02
Date Last Modified	2023-Aug-24
Created By
Revised By

Commodities

Primary Commodities: Silver, Cobalt

Secondary Commodities: Copper, Nickel

Location

Township or Area: Coleman

Latitude: 47° 22' 32.09" Longitude: -79° 39' 24.57"

UTM Zone: 17 Easting: 601397 Northing: 5247777 UTM Datum: NAD83

Resident Geologist District: Kirkland Lake

NTS Grid: 31M05NE

Point Location Description: Shaft

Location Method: AMIS Site Visit

Access Description: From hwy 11b, turn southeast following Coleman Rd which continues into Kerr Lake Rd (mileage 3.4km). Continue on Kerr Lake Rd for 0.5km to property boundary, approximately 200m east of Penn Mill/University Rd turnoff.

Exploration History

1904: silver vein discovered on shore of Kerr Lake. 1905-1939: Kerr Lake Mining Co. Ltd - 13 shafts and development work, in production. 1940-1948: Glen Lake Silver Mines Ltd. - in production. 1953-1956: Cobalt Consolidated Mining Corporation Ltd . - production from Kerr Lake and Crown Reserve properties

Geology

Province: Southern

Subprovince: Cobalt Basin

Supergroup: Huronian Supergroup

Formation Group: Cobalt Group

Geological Age: Paleoproterozoic

Lithology

Lithology Data
Rock Type	Rank	Composition	Relationship
Vein	1	Calcite	Host
Quartz Diabase	2	Quartz Diabase	Contains
Conglomerate	3	Conglomerate	Hanging Wall

Lithology Comments

Feb 12, 2015 (A Wilson) - The southerly-dipping north limb of the New Lake Diabase basin is exposed at surface in the south part of claim No.336; the axis of the arch (usually referred to as the Kerr Lake arch) between this and the Peterson Lake Diabase basin is in the vicinity of the north line of this claim and trends a little north of east. The lower contact of the diabase on claim No.336 rests for the most part on Keewatin rocks: the Cobalt series - Keewatin contact dips northerly and the bottom diabase contact southerly. This diabase contact has irregularities both in section and plan; as shown by Knight on a north-south section along the east boundary of the property the dips over much of its length are from 10 to 20°. but at several places they are nearly vertical, constituting "rolls". This map also shows that the general dip from surface to the south boundary of the claim is appreciably steeper than south of this boundary The Cobalt Series sediments exposed at surface are for the most part conglomerate or grit - the basal member of the series. In addition to very local irregularities in the lower contact of the Cobalt series the presence of two trough-like depressions in this contact has been pointed out by Knight; he regarded the depression as being due to pre-Huronian erosion. The axes of these depressions trend northerly - one is situated near the east line of the property the other near the west Iine. It will be noted that the series extends very little south of its contact at surface with the overlying Nipissing diabase. The Cobalt series - Keewatin contact in the south part of the area covered by the series approaches a horizontal (approximately 5°N. dip) attitude in contrast with a dip of 20 N 0 in the north part. The Keewatin is not exposed at surface on this property. In the western part it is made up of andesitic lavas with interflow cherty sedimentary bands. Knight showed such a 25-foot wide chert band with irregular northerly strike in the northwest corner of the claims. On the 140-foot level of shaft No 0 13, in the west central part of the property, a band of chert is exposed about 30 feet south of the shaft. The cherty sediments near shaft No,13 are in places black and carbonaceous. The bedded cherty sediments with nearly vertical dips described by Knight as occurring at the northeast and southeast corners of the property are regarded by the present writer as part of the Keewatin sediments which are exposed at surface on the Drummond claim, adjoining to the east. The position and nature of the contact or transition zone between the predominantly lava assemblage to the west and the predominantly cherty sediments to the east is not known.

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type
1	Silver	Economic	Ore
3	Chalcopyrite	Economic	Gangue
4	Pyrrhotite	Economic	Gangue
5	Galena	Economic	Gangue
6	Sphalerite	Economic	Gangue

Mineralization Comments

Feb 12, 2015 (A Wilson) - A large number of productive veins were mined on this property; of 36 listed by Knight, No.10, No.3, Fleming, No 7, Big Chamber, Main East and McDonald are given in order of productivity as the most important ones. Silver amounting to 3,345,233 oz, is reported to have been won from the No,10 vein between Aug 31, 1910 and Aug. 31, 1921 and 867,401 oz. from the McDonald vein over the same period. A large part of the total production was obtained from a small portion (near the northern line) of the claim. Most of the veins including the No.10, Fleming, Big Chamber and Main East, in this portion constitute a vein group, which trends at about N 070 ° E. The veins in the group have strikes sub-parallel to the trend of the group and branch and rejoin in a complicated pattern. The strike of the veins in the group is approximately parallel to that of the Cobalt Series sediments; the dip, where intersecting these, is steeply to the south and approximately at right angles to the dip of the sediments as is apparent from a view of the open cuts at surface. The grade of the silver extracted from the mine between 1905 and 1916 was170 oz/t Ag

Mineral Record Details

Classification
Rank	Classification
1	Vein (Cobalt-Type)

Characteristics
Rank	Characteristic
2	Stratabound
1	Vein

Production Data
Year	Tonnes	Commodities	Reference	Comment
1956	10		PR 1961-06 p.49	total production 1953-1956, combined production from Kerr Lake and Crown Reserve properties
1948	327		MDC010, p. 141	total production 1940-1948
1939	213318	Silver 886512447 Cobalt 295143 Copper 814	MDC010, p.140-141	total production 1905-1939

References

File - Resident Geologist file CO-0692

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.