Ontario Geological Survey
Permanent Link to this Record:
MDI52K13NW00018
| Record Name(s) | Madsen No. 1 Shaft - 1935, Madsen No. 1 Vein - 1935 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1991-Mar-10 |
| Date Last Modified | 2022-Oct-13 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Baird
Latitude: 50° 57' 32.7" Longitude: -93° 54' 48.99"
UTM Zone: 15 Easting: 435836.58 Northing: 5645672.01 UTM Datum: NAD83
Resident Geologist District: Red Lake
NTS Grid: 52K13NW
Point Location Description: NO. 1 SHAFT on KRL 11505
Location Method: Data Compilation
Access Description: The Madsen gold project is accessible from Red Lake by road via Highway 618. The Madsen mine site is 10 km southwest of Red Lake.
1927-1935: Prospecting and trenching carried out by X. Hahn, and M. Madsen. 1935: Madsen Red Lake Gold Mines Inc. sunk a 2-compartment shaft in two stages to a depth of 175 m. Levels were established at 30 m, 64.66 m, 99.1 m, 133.3 m, and 167.75 m horizons. A total of 932.08 m of underground development was completed. 14 drill holes were completed on surface totalling 751 m. Work on the No. 1 vein was suspended in 1936. 1938: The Madsen mill at the No. 2 shaft began operating. 1972: 775 m of drilling was completed. 1974: Bulora Corp. acquired the property and completed a 240 m decline to the 64.66 m level. 1976: Bulora went bankrupt. 1980-88: Red Lake Buffalo Resources acquired the property. 1991: Red Lake Buffalo reorganized into Madsen Gold Corp. 1998-2000: Claude Resources Inc. acquired the property and compiled information on the historic geophysical, geological, geochemical and drilling on the Madsen gold project including the No. 1 Vein. Claude conducted trenching, channel sampling, bulk sampling (7920 metric tonnes), and drilled 15 DDH totalling 1296 m on the No. 1 zone. 2001-05: Placer Dome Ltd. optioned the property from Claude. 2006: Claude reacquired the property. 2014: Laurentian Goldfields acquired the property from Claude. Laurentian changed the company name to Pure Gold Mining Inc.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 63.3002 | 52N04SW0216 | 52N04SW0216 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Red Lake
Geological Age: Archean
Metamorphism Grade: Amphibolite
Dec 07, 2005 (K R Kettles) - The rocks in the area of Madsen Mines can be grouped into two sequences: a lower tholeiitic to komatiitic sequence and an upper calc-alkalic sequence. The tholeiitic-komatiitic sequence contains two parts as well: a lower part composed of tholeiitic pillowed basalt, which contains the Austin Shear Zone, the host for the gold deposits; and an upper part of tholeiitic-komatiitic felsic to intermediate volcanics with minor interspersed mafic volcanics. Gabbro sills and dikes are present throughout the tholeiitic-komatiitic sequence. The calc-alkalic sequence is composed of rhyolitic flows, tuffs, and breccias. The rocks vary in strike across the area. Near the Madsen Mine the strike of the rocks is 030 deg and the dip is 65 deg to the southeast. One kilometre NE of Madsen the strike is 45 deg dipping 70 deg southeast. Foliation generally strikes 45 to 60 deg and dips 70 deg southeast. The rocks are metamorphosed to amphibolite facies, and the gold mineralization occurs in quartz veins in a granite dike cutting a gabbro sill. The vein varies from a few cm to 1.8 m wide, and has been traced along strike for 210 m. It strikes N65 degrees E and dips 60 degrees to the SW.
| Rock Type | Rank | Composition | Texture | Relationship | Vein | 1 | Quartz, Tourmaline | Banded | Host |
|---|---|---|---|---|
| Granite | 2 | Dike | Contains | |
| Gabbro | 3 | Gabbro | Sill | Adjacent |
Dec 07, 2005 (K R Kettles) - The country rocks for the Madsen gold deposits are altered and sheared tholeiitic to komatiitic pillowed basalt. These rocks contain the Austin Shear zone which hosts the gold deposits in the area. They are overlain by tholeiitic felsic to intermediate volcanic rocks previously thought to be part of the upper calc-alkalic sequence. The tholeiitic -komatiitic mafic volcanics are cut by gabbro sills and dikes. The No. 1 vein occurs in quartz veins in a granite dike cutting a gabbro sill. The vein is composed of dull white to smokey grey quartz with tourmaline banding common.
Mar 29, 2016 (Therese Pettigrew) - No. 1 shaft area is underlain by rocks of the Balmer Confederation comprising a mixture of mafic volcanic flows and mafic to intermediate intrusive rocks. The majority of the area is underlain by a massive, medium-grained gabbro that forms an extensive sill up to 365 metres in apparent thickness at the shaft. Intruding this gabbro is a light pink, fine-grained felsic dyke that is 3 to 5.5 metres thick, oriented at 072 degrees, and dipping to the southeast at 60 degrees. The felsic dyke has been exposed on surface for a distance of 120 metres as part of a surface stripping and sampling program. Intruding the dyke at or near its contact with the enclosing gabbro is a quartz vein and veinlet system that extends more or less continuously for 130 metres. It has been delineated a further 120 metres in trenches. The quartz varies from white to dark grey and is generally not well mineralized with sulphides. Visible gold was observed in several locations. On surface, the veining pinches and swells considerably with overall widths ranging from 15 centimetres to one metre. As well, the vein is sometimes massive but is also composed of numerous narrow stringers cutting the felsic dyke. The vein occurs within the dyke for a distance of 75 metres where it passes into the gabbro and becomes more discontinuous. Historical estimates of the vein are up to 70.9 centimetres at an average grade of 17.31 gpt gold over a length of 180 metres (Weiershauser and Cole, 2014).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Gold | Economic | Ore | ||||
| 2 | Pyrite | Economic | Ore | ||||
| 3 | Arsenopyrite | Economic | Ore | ||||
| 4 | Chalcopyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Tourmaline | Economic | Gangue |
Dec 07, 2005 (K R Kettles) - The gold mineralization occurs in quartz veins in a granite dike cutting a gabbro sill. The vein varies from a few cm to 1.8 m wide, and has been traced along strike for 210 m. It extends to a depth of 100 m. The vein is comprised of dull white to smokey grey quartz with common tourmaline banding. Sulphide mineralization consists of finely disseminated pyrite. The vein strikes N65 degrees E and dips 60 degrees to the SW. The No. 2 vein occurs in a well defined cross structure of the No. 1 vein. It is traced along strike for 24 m. The No. 2 vein is similar in style of mineralization to the No.1 vein. The No. 1 vein contains an estimated 34,251 tons grading 0.36 oz/ton Au over a 1.2 m mining width.
Mar 29, 2016 (Therese Pettigrew) - Channel sampling in the No. 1 Shaft area returned results that included 10.73 gpt Au over 0.86 m in Channel 22-31, 6.17 gpt Au over 0.86 m in Channel 32-36, 30.51 gpt Au over 1.05 m in Channel 12-37, and 7.20 gpt Au over 0.88 m in Channel 43-48. Based on the results of the sampling it was decided to extract a bulk sample from the surface of the vein. Three benches were mined for approximately 7,920 metric tonnes of vein and wallrock. An additional waste stockpile of 5,440 metric tonnes was generated with a reported average grade of 4.83 gpt Au (Weiershauser and Cole, 2014).
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| 1 | Vein |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
| Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
|---|---|---|---|---|---|---|---|---|---|
| Unknown | 210 | 1 | 100 | 65 | 60 |
Date: Dec 07, 1996
Geologist: K R Kettles
Notes: N/A
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| Madsen No. 1 Vein | 1999 | Proven | 5418 | 2014 NI 43-101 report p. 39 | This is not an NI 43-101 compliant resource. Grade of 5.83 gpt Au for 1015 oz Au | Gold 5.83 Grams per Tonne |
| Madsen No. 1 Vein | 1972 | Unclassified | 31072 | OFR 5558 P. 34 | Contains 34251 tons grading 0.36 opt Au over 1.2 m mining width. | Gold 12.34 Grams per Tonne |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1972 | 2759 | OFR5558, p. 34 | In 1936, 3041 tons of ore were brought to surface and stockpiled. In 1972, this stockpiled ore was run through the Madsen mill. No recovery was reported. |
File - Resident Geologist files AF RL 1940-73 Baird #30
Publication Number: AF BAIRD30 Date: 1940
Author:
Publisher Name:
Location: Red Lake RGP
Map - Baird Township, eastern part, Kenora District
Publication Number: M2072 Scale: 1:12,000 Date: 1997
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines
Location:
File - Resident Geologist files AF RL 1944-69 Baird #42
Publication Number: AF BAIRD42 Date: 1944
Author:
Publisher Name:
Location: Red Lake RGP
Part - Gold deposits in the vicinity of Red Lake
Publication Number: ARV44-06.001 Page: 35-36 Date: 1997
Author: Hurst M.E.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology and mineral deposits of the Red Lake area
Publication Number: ARV49-02 Page: 180 Date: 1998
Author: Horwood H.C.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of the eastern part of Baird Township, District of Kenora
Publication Number: R039 Page: 23 Date: 1997
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Gold occurrences, prospects, and deposits of the Red Lake area, volumes 1 and 2
Publication Number: OFR5558 Page: 33-34 Date: 1987
Author: Durocher M.E., Burchell P.S., Andrews A.J.
Publisher Name: Ontario Geological Survey
Location:
File - 1935, Resident Geologist's Files, Red Lake
Publication Number: AF 1935 RK Date: 1935
Author: Honsberger, A.H.
Publisher Name:
Location: Red Lake RGP
Publication - Technical Report for the Madsen Gold Project, Red Lake, Ontario, Canada
Publication Number: 2014 43-101 Date: 2014
Author: Weiershauser, L., Cole, G.
Publisher Name: SRK for Laurentian Goldfields
Location: SEDAR
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