Ontario Geological Survey
Permanent Link to this Record:
MDI52O03NE00006
| Record Name(s) | Drum Lake # 2 - 1990, North Dunlop Lake - 1990, Ontario Gold Joint Venture - 9999 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1990-Nov-28 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Drum Lake Area
Latitude: 51° 14' 14.28" Longitude: -91° 1' 20.11"
UTM Zone: 15 Easting: 638062.749 Northing: 5678072.411 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52O03NE
Point Location Description: Small outcrop 400 m north of small lake known locally as Dunlop Lake.
Location Method: Data Compilation
Access Description: The occurrence is located about 61 km southwest of Pickle Lake. It is about 2 km southwest of Mousetrap Lake and 400 m north of a small lake known locally as Dunlop Lake. Access to this occurrence is by appropriately equipped aircraft to Mousetrap Lake and traversing overland to the trenches. Small helicopters may be able to land near Dunlop Lake.
1972: Cochenour Willans Gold Mines Ltd. and Selco Exploration Company Ltd., in joint venture, did an airborne geophysical survey of the area and followed up with ground magnetometer and electromagnetic surveys in the Dunlop Lake area. 1978: Cominco Ltd. commissioned an airborne magnetometer survey over the Dunlop Lake area. 1979: Cominco Ltd. did ground magnetometer, electromagnetic, and gravity surveys and geological mapping on claims covering the South Dunlop Lake occurrence. 1981: Cominco Ltd. drilled a 99 m diamond-drill hole west of the South Dunlop Lake occurrence. 1984-1988: The Ontario Gold Joint Venture (Northern Dynasty Exploration Ltd., Westfield Minerals Ltd. and Newfield Minerals Inc.) conducted a multi-phased exploration program on claims covering the South Dunlop Lake occurrence. The work included airborne magnetometer and electromagnetic survey, ground magnetometer and electromagnetic surveys, geological mapping, rock and soil geochemistry, stripping and trenching, sampling and 3 diamond-drill holes totalling 144.47 m. 1986: Geocanex Ltd. commissioned airborne magnetometer and electromagnetic surveys over an area which included the South Dunlop Lake occurrence.
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Meen-Dempster
Geological Age: Neoarchean
Dec 07, 2005 (B Nelson) - This occurrence is found in a chert-magnetite iron formation contained in an intermediate to felsic-metavolcanic unit. The Billett Lake deformation zone encompasses the intermediate- to felsic-metavolcanic unit and the iron formation. Both the deformation zone and the rock units strike east-southeast. At the occurrence, the iron formation is intercalated with a chlorite-sericite schist in an 8 m exposure.
| Rock Type | Rank | Composition | Texture | Relationship | Ironstone-unsubdivided | 1 | Chert/Magnetite Iron Formation | Host |
|---|---|---|---|---|
| Schist-Unsubdivided | 2 | Chlorite/Sericite | Host | |
| Intermediate lava flow-unsubdivided | 3 | Int-Fels Metavolcanic | Near |
Dec 07, 2005 (B Nelson) - At the occurrence, the iron formation is intercalated with a chlorite-sericite schist in an 8 m exposure. Up to 3 percent pyrite is contained in the iron formation and in the chlorite-sericite schist.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Pyrite | Economic | Ore | ||||
| 2 | Magnetite | Economic | Ore | ||||
| Sericite | Alteration | Sericitization | 1 | ||||
| Chlorite | Alteration | Chloritic | 2 |
Dec 07, 2005 (B Nelson) - Up to 3 % pyrite is contained in the iron formation and in the chlorite-sericite schist. The best assay reported for this occurrence is 0.32 oz Au/ton over 0.7 m. North of Arrowhead Lake (local name), about 1.7 km along strike from this occurrence, Northern Dynasty Exploration Ltd. reported assays from a trench on the iron formation that averaged 0.037 oz Au/ton over 1.0 m from a brecciated quartz vein containing 15% pyrite.
Dec 07, 2005 (B Nelson) - Chloritie-sericite schist contains mineralization.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Sheared |
Map - Cat River-Kawinogans Lake area, District of Kenora (Patricia Portion), Ontario
Publication Number: ARM44F Scale: 1:126,720 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of the Cat River-Kawinogans Lake area
Publication Number: ARV44-06.002 Date: 1997
Author: Harding W.D.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Cat Lake-Pickle Lake, geological compilation series, Kenora and Thunder Bay districts
Publication Number: M2218 Scale: 1:253,440 Date: 1976
Author: Sage R.P., Breaks F.W., Troup W.R.
Publisher Name: Ontario Division of Mines
Location:
MonoMap - Geology of the Cat Lake-Pickle Lake area, districts of Kenora and Thunder Bay
Publication Number: R207 Date: 1982
Author: Sage R.P., Breaks F.W.
Publisher Name: Ontario Geological Survey
Location:
Map - Precambrian geology, Muskegsagagen-Bancroft lakes area, District of Kenora (Patricia Portion)
Publication Number: M2507 Scale: 1:50,000 Date: 1986
Author: Stott G.M., Wilson A.C.
Publisher Name: Ontario Geological Survey
Location:
Mono - Mineral Deposits of the Central Portion of Uchi Subprovince, Volume 1, Meen Lake to Kesagiminnis Lake Portion
Publication Number: OFR5869 Page: 65 Date: 1993
Author: Seim G.Wm.
Publisher Name: Ontario Geological Survey
Location:
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