Ontario Geological Survey
Permanent Link to this Record:
MDI52O02NW00007
| Record Name(s) | Duffel Lake #6 - 1984 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2003-Aug-15 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Gold
Township or Area: Duffell Lake Area
Latitude: 51° 14' 47.51" Longitude: -90° 57' 36.09"
UTM Zone: 15 Easting: 642377.773 Northing: 5679217.691 UTM Datum: NAD83
Resident Geologist District: Thunder Bay North
NTS Grid: 52O02NW
Point Location Description: Sample ED-R-19 located 20 m south of Beardrum Lake (AF 52O06SE-0032).
Location Method: Data Compilation
Access Description: This occurrence is located about 57 km southwest of Pickle Lake. The occurrence is 20 m south of a small lake locally known as Beardrum Lake which is between Dempster Lake and Mousetrap Lake. Access to Dempster Lake or Mousetrap Lake is by appropriately equipped aircraft.
1984: Dunlop Explorations working for the Ontario Gold Joint Venture (Northern Dynasty Explorations Ltd. and Newfield Minerals Inc.) conducted a prospecting and sampling program in the Dempster Lake area. 1985-1988: The Ontario Gold Joint Venture (Northern Dynasty Explorations Ltd. and Newfield Minerals Inc.) conducted an exploration program on a large block of claims in the Dempster Lake area. The multi-phased program included geological mapping, stripping and trenching, rock and soil geochemistry and airborne mag and EM surveys, ground mag and EM surveys and diamond-drilling.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| 52O06SE0032 | 52O06SE0072 | 52O06SE0072 |
Province: Superior
Subprovince: Uchi
Terrane: North Caribou
Domain: Uchi
Belt: Meen-Dempster
Geological Age: Neoarchean
| Rock Type | Rank | Composition | Texture | Relationship | Porphyry-unsubdivided | 1 | Contains |
|---|---|---|---|---|
| Intermediate lava flow-unsubdivided | 2 | Dacite | Near | |
| Mafic lava flow-unsubdivided | 3 | Near |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Chalcopyrite | Economic | Ore |
Jun 21, 2007 (Mark Puumala) - This gold occurrence is described by Youngman (1985) as an outcrop of feldspar porphyry containing quartz-tourmaline stringer veins. The geological compilation map included in Youngman (1985) also indicates the presence of chalcopyrite mineralization in the veins. This occurrence is interpreted by Youngman (1985) to be one of a number of gold occurrences that are found within a well-foliated to sheared metadacite unit along a total strike length of 8.2 km. Other occurrences associated with this horizon include the North Dempster Lake gold occurrence to the northeast (MDI52O07SW00006), and the South Dunlop Lake occurrence (MDI52O03NE00005) to the southwest. The foliation orientation in the sheared metadacite unit varies from northeast-striking in the vicinity of Dempster Lake, to southeast-striking in the Dunlop Lake area as it wraps around the southern margins of the Graniteboss Stock. Foliation in the vicinity of the Duffel Lake #6 occurrence is indicated by Youngman to be oriented approximately 060/90. The variability in the foliation orientation is likely to be related to emplacement of the Graniteboss Stock, which is a 2700 Ma late- to post-tectonic intrusion (Stott 1996). Mineralization in the area of this occurrence is likely to be related to a nearby major southeast-striking deformation zone that was identified by Stott and Wallace (1984) in the area between Billett and Teevin Lakes. The most notable assay value reported by Youngman (1985) from this occurrence was a grab sample result of 1680 ppb Au.
| Rank | Classification |
|---|---|
| 1 | Lode (Gold) |
| Rank | Characteristic |
|---|---|
| 1 | Vein |
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 - The Geology and Tectonic History of the Central Uchi Subprovince
Publication Number: OFR5952 Date: 1996
Author: Stott G.M.
Publisher Name: Ontario Geological Survey
Location:
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