Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31M05SE00019

Record: MDI31M05SE00019

General

Commodities

Primary Commodities: Silver, Cobalt

Secondary Commodities: Nickel, Zinc, Copper, Lead

Location

Township or Area: Coleman

Latitude: 47° 22' 26.74"    Longitude: -79° 39' 38.02"

UTM Zone: 17    Easting: 601118   Northing: 5247606.99    UTM Datum: NAD83

Resident Geologist District: Kirkland Lake

NTS Grid: 31M05SE

Point Location Description: Shaft

Location Method: AMIS Site Visit

Access Description: Take highway 11b south from Cobalt to Coleman Road; turn southeast and follow Coleman Road for 3.4km where it joins into the Kerr Lake Road; continue for another 350m (75m east of Penn Mill/University Road turnoff) to the no.1 shaft.

Exploration History

1905-07: Lawson discovered the deposit and began production. 1909-1917: LaRose Mines Ltd. acquired the property, in production. 1918 -1944: property leased for silver and cobalt operations. 1953: LaRose-Rouyn Mines Limited acquired the property. 1959-64: Silver-Miller Mines Ltd. began exploration and mining for silver content only, 23 underground diamond drill holes totaling 3 383 ft, Underground workings from Lawson Property extended onto Kerr Lake Fraction and Conisil Claims. 1986: Canadaka Mines Ltd. optioned the property of several former mines (Lawson, University, Cleopatra, and Conisil shafts) and dewatered the workings. 2005: Outcrop Exploration Ltd completed 1 diamond drill hole totaling 320m.

Assessment Work on File

Geology

Province: Southern

Subprovince: Cobalt Basin

Supergroup: Huronian Supergroup

Formation Group: Cobalt Group

Geological Age: Paleoproterozoic  

Lithology

Lithology Comments

Feb 17, 2015 (A Wilson) - Andesitic lavas with interflow sediments are exposed on the south part of the claim. The interflow sediments consist of chert, carbonaceous greywacke and tuffaceous rocks. In the southwest part of the claim the flows have an easterly strike and face north; traced easterly they appear to bend southerly, in the north part of the claim the flows strike north of east and possibly lie on the north limb of a Keewatin syncline. Information is however not sufficient to prove the presence of a Keewatin synclinal axis striking north of east through the central part of the claim. The northern part of the claim is covered by Cobalt Series sediments, which attain a thickness of about 60 feet near the north boundary. The sediments, in ascending order,conglomerate, bedded greywacke and quartzite, dip about 15°N. Nipissing diabase outcrops in the southern part of the claim; the bottom contact dips about 30°S. No important faults are known to occur on this property.

Mineralization

Mineralization Comments

Feb 17, 2015 (A Wilson) - In the early days of the camp the property was very successfully worked for silver; the silver occurred in veinsin the shallow Cobalt Series sediments and also in Keewatin rocks. From about 1948 to 1957 the aim of exploration was widened to include cobalt as well as silver. This exploration was largely carried out in Keewatin rocks. A considerable production of cobalt was obtained but quite minor amounts of silver. Base metal mineralization, chalcopyrite, galena, sphalerite and pyrrhotite occur; although in general not of economic promise, a small tonnage has been mined and milled for its base metal content. The close association of many of the veins with sedimentary interflow bands in Keewatin rocks is a striking feature of this property. Such veins include Nos.2s 8, 9, 10-S and 11. The zonal relationships of silver occurring above cobalt deposition in the same vein is in general true but in detail is subject to great variation. Base metal mineralization occurs where the veins have Keewatin interflow sedimentary bands, particularly chert beds, as host rocks; insufficient work has been done to show significant variation mineralogically or in metal content in relationship to depth or laterally. Cobalt mineralization in general dies out with increasing depth but that of the base metals continues as deep as exploration has gone. The cobalt mineralization cuts through the chalcopyrite -sphalerite - galena replacements. On this property the Nipissing diabase has been a poor host rock for veins in so far as exploration has been done to the present. Where strong veins, as for instance Nos.2 and 10-S, enter the diabase from the underlying Keewatin they break up into stringers and the vein structures appear to end. In view of this, less prospecting of the diabase than other formations has been done. Vein 1-S, near the south boundary of the Lawson and in the Kerr Lake fraction to the south, contains silver where in diabase but has to date been much more productive where in the underlying Keewatin. The Cobalt Series sediments show strong chloritic alteration of the spotted type.

Mineral Record Details

References

File - Resident Geologist files CO-0698, CO-0701

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.

Publisher Name: Ontario Dept. of Mines

Location:

Part - Geology of the mine workings of Cobalt and South Lorrain silver areas

Publication Number: ARV31-02.001 Page: 34, 99-100, 193  Date: 1998

Author: Knight C.W.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Preliminary report on parts of Coleman Township, concession 4, lots 1 to 5, and Gillies Limit, the eastern "A" claims, District of Timiskaming

Publication Number: PR1961-06 Date: 1998

Author: Thomson R.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Silver cobalt calcite vein deposits of Ontario

Publication Number: MDC010 Page: 84-86, 146-147  Date: 1968

Author: Sergiades A.O.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological Compilation of the Cobalt-Temagami Area, Abitibi Greenstone Belt

Publication Number: P3581 Scale: 1:100,000    Date: 2006

Author: Ayer J.A., Chartrand J.E., Grabowski G.P.B., Josey S.D., Rainsford D.R.B., Trowell N.F.

Publisher Name: Ontario Geological Survey

Location:

Map - Haileybury sheet, districts of Timiskaming and Nipissing, geological compilation series

Publication Number: P0321 Scale: 1:126,720    Date: 1997

Author: Thomson R., Savage W.S.

Publisher Name: Ontario Dept. of Mines

Location:

Report an Error

We are continuously updating our assessment file / technical report information. If you notice errors in the data, please contact us.

Terms of Use

Please review our Terms of Use agreement for this data product.

Ministry Contact Information

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