Ontario Geological Survey
Permanent Link to this Record:
MDI31M03NW00018
| Record Name(s) | Ramardo Mines Property Group 3 - 1967, Lorrain Trout Lake Mines Ltd. - 1923, J. A. Gore Property - 1980 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Past Producing Mine Without Reserves or Resources |
| Date Created | 1980-Aug-27 |
| Date Last Modified | 2022-Sep-20 |
| Created By | |
| Revised By |
Primary Commodities: Silver, Cobalt
Township or Area: South Lorrain
Latitude: 47° 11' 32.65" Longitude: -79° 28' 31.14"
UTM Zone: 17 Easting: 615497 Northing: 5227673 UTM Datum: NAD83
Resident Geologist District: Kirkland Lake
NTS Grid: 31M03NW
Point Location Description: Shaft
Location Method: AMIS Site Visit
Access Description: From North Cobalt, take highway 567 south toward Silver Centre. Drive 32.8km; stop at side of road and traverse southwest of the swamp at the side of the road - the site is on the west side of the large swamp.
1923-25: Claim HR103 – trenching and an inclined shaft was sunk on the vein, commencing in 1923 and by the end of the year was down 319 ft. with 220 ft. of drifting on the 240 ft. level; shaft was completed to the 475 ft. level. 1926-27: drifting from Keeley Mine carried out unsuccessfully to find ore below 475 ft. 1925: Claim HR107 – No. 2 shaft sunk to 850 ft. with extensive levels of several hundred feet at 350’, 650’, 750’ and 850’ depths. 1954: extensive survey of underground workings, including 3 DDH totaling 1800’.1954: Ramardo Mines Property - DD-3-1800 ft. Claim HR88: shaft down to 40 ft. on a calcite vein. 1949: Oxbow Lake Group – 2 DDH put down on claim HR 46. 2006: Adroit Resources – airborne geophysical survey (EM and magnetic).
Province: Southern
Subprovince: Cobalt Basin
Supergroup: Huronian Supergroup
Formation Group: Cobalt Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Intermediate lava flow-unsubdivided | 1 | Intermediate To Mafic Metavolcanics | Host |
|---|---|---|---|---|
| Gabbroid-Unsubdivided | 2 | Contains | ||
| Vein | 3 | Calcite | Intrudes |
Aug 17, 2017 (A Wilson) - Keewatin volcanics are intruded by the west side of a domed Nipissing quartz diabase sheet up to 1006’ thick. Two major silver producing calcite veins occur in the volcanics above the upper contact of the diabase; the Wood’s Vein in HR103 occurs in a reverse fault that strikes north with a 65º E dip; it is about 6 inches wide, and silver deposition may in part be supergene from preglacial weathering. The No. 2 Vein in HR107 lies in a fault with a NW strike and steep southwest dip that follows a trap dike. Silver production came from the top of the diabase and the volcanics. Cobalt arsenides are also present. Barren calcite occurs over in the diabase.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Silver | Economic | Ore | ||||
| 2 | Smaltite | Economic | Ore | ||||
| 3 | Niccolite | Economic | Ore | ||||
| 4 | Chalcopyrite | Economic | Ore |
Aug 17, 2017 (A Wilson) - Sampling from carbonate veins in a stripped area returned assays ranging from 1.70% Cu; 0.017% Zn; 0.021% Cu. Veins in the No. 1 and No. 2 shafts are copper-cobalt bearing. These veins are unusual for the township in that they are in Coleman Formation rocks, approximately 100 ft. thick and separated from the underlying diabase by about 900 to 1,000 feet of metavolcanics. More recent work in 1963-64 by the present owners consisted of geological mapping and the drilling of numerous holes. Copper assays ranged from 0.635% to 0.645%. Zinc assays reached as high as 0.130% and cobalt assayed as high as 1.582% Co. Production from this property was just over one million ounces of silver along with some cobalt and very minor nickel. The bulk of this production came from the Wood’s vein in No. 1 shaft and No. 2 vein. The best assay from the drilling reportedly returned 73 oz./t Ag over 18 inches. The best assay from the drilling reportedly returned 73 oz/t Ag over 18 inches.
| Rank | Classification |
|---|---|
| 1 | Vein (Cobalt-Type) |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1924 | 22784 | ore and concentrate shipped 22,784 tonnes ; ore 22,405 tonnes |
File - Resident Geologist files CO-1897
Publication Number: Date:
Author:
Publisher Name:
Location: Kirkland Lake RGP office
Map - South Lorrain Township, Timiskaming District
Publication Number: M2194 Scale: 1:31,680 Date: 1970
Author: McIlwaine W.H.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Silver cobalt calcite vein deposits of Ontario
Publication Number: MDC010 Page: 418-419, 438 Date: 1968
Author: Sergiades A.O.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of south Lorrain Township, District of Timiskaming
Publication Number: R083 Page: 80-81 Date: 1970
Author: McIlwaine W.H.
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 - South Lorrain Township (north part), District of Timiskaming
Publication Number: P0289 Scale: 1:15,840 Date: 1997
Author: McIlwaine W.H.
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: 236 Date: 1998
Author: Knight C.W.
Publisher Name: Ontario Dept. of Mines
Location:
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