Ontario Geological Survey
Permanent Link to this Record:
MDI42E12NW00048
| Record Name(s) | Dajaty (Watson Lake) Gold Occurrence - 9999, Central Manitoba Mines - 9999, Watson Lake Gold Occurrence - 9999, Undersill Gold Claims - 9999, Watson Lake - 1980, S. Cowan - 1980 |
|---|---|
| Related Record Type | Partial |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1980-Feb-26 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Secondary Commodities: Iron
Township or Area: Irwin
Latitude: 49° 40' 31.09" Longitude: -87° 46' 59.07"
UTM Zone: 16 Easting: 443502.45 Northing: 5502824.934 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 42E12NW
Point Location Description: Trenches and diamond-drill holes.
Location Method: Conversion from MDI
Access Description: The property is located in southeastern Irwin Township and northwestern Mccomber Township at Watson Lake. Drive east along Highway 11 from Beardmore 13.3 km to the Windigokan Lake Road. Proceed north approximately 3.2 km to the Watson Lake area.
1917: International Mining Development Co. conducted trenching and shaft sinking to a depth of 11 m on the iron formation. 1920s: A.E. Tyson conducted trenching and prospecting on the eastern portion of the property. An irregular zone of auriferous replacement sulphides was outlined in iron formation between Watson and Doris Lake. 1946: D. Macleod conducted trenching, prospecting, mag and IP surveys on the western portion of the iron formation. 1957: Central Manitoba Mines Ltd., exploring for iron, worked the entire Watson Lake area and completed 4 diamond-drill holes, totalling 308 m. 1983: Normine Resources Ltd. optioned the entire block and contracted Bema Industries Ltd. to conduct linecutting, geological, geochemical and geophysical surveys to examine a gold-bearing quartz vein and other patented target areas. 1984: Normine dropped the option. E. Rentz and O. Theriault optioned claims covering the Watson-Doris Lake (east) portion to Canamax Resources Inc. Canamax conducted mechanical, mag and VLF surveys. 1985: Diamond-drilling commenced on auriferous vein sulphide-related iron formation at Watson Lake and the volcanic sediment contact to the north.
Province: Superior
Geological Age: Archean
Dec 07, 2005 (B Nelson) - The Watson Lake property is underlain by sedimentary rocks consisting of wacke, feldspathic and quartzose sandstone, siltstone, phyllite-argillite, conglomerate and oxide ironstone.The metasediments are in fault contact to the north with mafic metavolcanics. The metavolcanics included massive, amygdaloidal and pillowed metavolcanics, breccia tuff and tuffaceous schist. The iron formation is located south of and is conformable with the Watson Lake Fault. The ironstone unit is a significant marker unit that is spatially associated with gold production at Beardmore and Geraldton. The ironstone unit east of Watson Lake consists of two specific units. The northern is strongly magnetic iron formation consisting of beds of fine-grained, thinly bedded magnetite and hematite from 1-3 cm intercalated with thin beds of chlorite slate and quartz. The southern iron formation consists mainly of chloritic phyllite with thin interbeds of hematite-jasper chert averaging 1-2 m thick. It has been sheared along the phyllite-iron formation contacts with injection of irregular quartz-carbonate-sulphide veins. The two iron formations may represent limbs of an isoclinally folded syncline. There are two main zones of quartz-carbonate veining and auriferous sulphide mineralization. The 'Watson Lake Grid' is a 24 cm wide zone of pyrite replacement in sheared phyllitic iron formation on Line 28+00 E to 31+50 N. The zone assays ).148 oz/ton Au and has been prospected by a shallow pit. The 'Doris Lake Grid' is a qtz-carb-auriferous sulphide vein and replacement present along sheared contacts with jasper-hematite-chert iron formation along an irregular zone at 14+50 E and from L16+00 E to L16+50 E. The weighted average grade of samples take from this zone is 0.25 oz/ton Au.
| Rock Type | Rank | Composition | Texture | Relationship | Sandstone | 1 | Wacke | Near |
|---|---|---|---|---|
| Siltstone | 2 | Near | ||
| Ironstone-unsubdivided | 3 | Mg-Hm-Jasper | Host | |
| Intermediate Tuff | 4 | Andesite | Tuffaceous | Near |
| Mudstone | 5 | Phyllite-Argillite | Near | |
| Conglomerate | 6 | Near |
Dec 07, 2005 (B Nelson) - Nordin (1984) described three lithological units specifically on the Watson Lake property: 1) andesite tuff; 2) thin bedded magnetite-hematite-jasper phyllite iron formation; 3) massive to phyllite greywacke.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Hematite | Economic | Ore | ||||
| 2 | Magnetite | Economic | Ore | ||||
| 3 | Pyrite | Economic | Ore | ||||
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Carbonate | Economic | Gangue | ||||
| Quartz | Alteration | Silicification | 1 | ||||
| Unspecified | Alteration | Sulphidation | 2 |
Dec 07, 2005 (B Nelson) - Unspecified sulphides also constitute ore minerals. Bema Industries' samples had a weighted average assay result of 0.25 oz/ton Au and 0.07 oz/ton Ag. One 50 cm interval assayed 1.144 oz/ton Au and 0.18 oz/ton Ag. The shear zone continues to the east and west and is sporadically mineralized with pyrite, as on L14+50--trench 14, where a 50 cm sample assayed 0.84 oz/ton Au.
Date: Dec 31, 1996
Geologist: B Nelson
Notes: The Beardmore-Geraldton Economic Geologist visited this occurrence June 12, 1985.
Map - Sturgeon River gold area, District of Thunder Bay, Ontario
Publication Number: ARM45A Scale: 1:63,360 Date: 1998
Author: Bruce E.L., Laird H.C.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Irwin Township, District of Thunder Bay
Publication Number: P0481 Scale: 1:15,840 Date: 1997
Author: Mackasey W.O.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Tashota-Geraldton sheet, geological compilation series, Thunder Bay and Cochrane districts
Publication Number: M2102 Date: 1997
Author: Pye E.G., Harris F.R., Fenwick K.G., Baillie J.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Dorothea, Sandra, and Irwin townships, District of Thunder Bay
Publication Number: R122 Date: 1975
Author: Mackasey W.O.
Publisher Name: Ontario Division of Mines
Location:
Book - GDIF 42E12NW (unpublished)
Publication Number: GDIF Date: 1988
Author: Ontario Geological Survey
Publisher Name: Ontario Geological Survey
Location: Thunder Bay RGP
Map - Dorothea, Sandra and Irwin townships, Thunder Bay District
Publication Number: M2294 Scale: 1:31,680 Date: 1974
Author: Mackasey W.O.
Publisher Name: Ontario Division of Mines
Location:
File - Resident Geologist Mineral Deposit Files
Publication Number: Min Dep Date:
Author:
Publisher Name:
Location: Thunder Bay RGP
Part - The western part of the Sturgeon River area (Sturgeon R.-Beardmore section)
Publication Number: ARV45-02.002 Date: 1998
Author: Laird H.C.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Gold occurrences, prospects, and deposits of the Beardmore-Geraldton area, districts of Thunder Bay and Cochrane
Publication Number: OFR5630 Date: 1986
Author: Mason J.K., White G.D.
Publisher Name: Ontario Geological Survey
Location:
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