Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52O02NW00004

Record: MDI52O02NW00004


Mineral Record Identification
Record Name(s) Duffell Lake # 2 - 1990, Noranda Duffell Lake - 9999, Bazinet No. 8 - 2000
Related Record Type Simple
Related Record(s)
Record Status Occurrence
Date Created 1990-Nov-27
Date Last Modified 2022-Sep-27
Created By
Revised By


Primary Commodities: Gold


Township or Area: Duffell Lake Area

Latitude: 51° 12' 19.82"    Longitude: -90° 50' 54.69"

UTM Zone: 15    Easting: 650292.774   Northing: 5674878.039    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O02NW

Point Location Description: Centre of 8 trenches 325 m south of creek junction with beaver pond on Noranda grid map.

Location Method: Data Compilation

Access Description: The occurrence is located about 52 km southwest of Pickle Lake. There is a small lake (pond) located 2 km southwest of Duffell Lake. The mineral occurrence is located about 175 m south of the small lake. The best means of access is by an appropriately equipped aircraft to an unnamed lake located 2 km south of Duffell Lake. On the north shore of the lake is an old diamond-drill camp and core storage area. Diamond-drill trails lead from the camp to the small lake located north of the mineral occurrence. Midway along the south shore of the small lake , one traverses south to the mineral occurrence.

Exploration History

1969: Newconex Canadian Exploration Ltd. staked a large claim group that bordered to the north and east of the Duffell Lake #2 gold occurrence. Newconnex conducted an exploration program consisting of a Crone JEM survey and geological mapping. 1983: Noranda Exploration Company Ltd. staked a block of claims which extended over the occurrence. 1984: Noranda conducted an exploration program consisting of magnetometer, VLF-Em and geological surveys on a flag line grid. A test humus sampling survey was conducted over the mineral occurrence area and a second area of the claim group. 1986: Noranda cut a grid on the property and conducted magnetometer, HLEM surveys and a second geological survey. 1988-2001: Prospecting, trenching, geological and geophysical surveys and diamond drilling by E.W. Bazinet, Milner Consolidated Silver Mines and Iron Lake Minerals.


Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Meen-Dempster

Geological Age: Neoarchean  

Geology Comments

Dec 07, 2005 (B Nelson) - The Duffell Lake #2 mineral occurrence is a 12 cm to 24 cm wide quartz vein that is exposed in an outcrop, and at one time was probably exposed in a series of shallow trenches over a strike length of up to 30 m. The host rock to the vein is a pillowed metabasalt. The southern end of the vein, as exposed, trends northeast (~030) and dips vertically. To the north, the vein turns to trend east-northeast (~070). The vein is cut off to the north by a 1.5-2.5 m breccia zone that strikes 115 degress through the pillowed metabasalt. The vein contains up to 35 percent arsenopyrite masses in tension fractures and disseminated euhedral pyrite. About 50 m west-northwest of the quartz vein is an outcrop where a 1 m wide feldspar porphyry dyke intruded the metabasalt and the breccia zone. The feldspar-porphyry dyke contains quartz-filled tension fractures up to 60 cm in length and 15 cm wide. The dyke trends 090 degrees. The breccia zone can be traced a further 50 m west-northwest to another outcrop. At the southern edge of this outcrop is a narrow(~45 cm) shear zone.


Lithology Data
Rock Type Rank Composition Texture Relationship
Vein 1 Quartz Host
Breccia-unsubdivided 2 Adjacent
Feldspar Porphyry 3 Near
Mafic pillowed flow 4 Pillowed Adjacent


Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Alteration Style

Mineralization Comments

Dec 07, 2005 (B Nelson) - Mineralization occurs in quartz vein, breccia zone and shear zone. A chip sample across the shear zone assayed 2810 ppb Au. Noranda Exploration Company Ltd. reported the following assay results: 0.10, 0.18, 0.25 oz Au/ton, 0.07 oz Au/ton over 6.0 feet and 0.43 oz Au/ton over 2.0 feet. The Sioux Lookout Staff Geologist examined the occurrence in 1988. He took several grab and chip samples in an attempt to confirm the Noranda results. His results are as follows: GWS-88-59: A composite grab of the arsenopyrite bearing quartz vein ran 3690 ppb Au. GWS-88-60: 2 m chip of breccia zone ran 1220 ppb Au. GWS-88-61: Grab of feldspar porphyry ran 3 ppb Au. GWS-88-62: Grab from quartz filled tension fracture in feldspar porphyry ran 4 ppb Au. GWS-88-63: Grab of breccia zone near feldspar porphyry ran <2 ppb Au. GWS-88-63: 45 cm chip of shear zone 100 m west-northwest of arsenopyrite bearing quartz vein ran 2810 ppb Au.

Alteration Comments

Dec 07, 2005 (B Nelson) - No alteration observed

Mineral Record Details

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


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


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


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


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


Mono - Mineral Deposits of the Central Portion of Uchi Subprovince, Volume 1, Meen Lake to Kesagiminnis Lake Portion

Publication Number: OFR5869 Page: 48  Date: 1993

Author: Seim G.Wm.

Publisher Name: Ontario Geological Survey


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For detailed information regarding this mineral record please contact the Thunder Bay North Resident Geologist District Office