Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52O02NW00003

Record: MDI52O02NW00003

General

Commodities

Primary Commodities: Gold

Location

Township or Area: Duffell Lake Area

Latitude: 51° 13' 34.35"    Longitude: -90° 52' 44.65"

UTM Zone: 15    Easting: 648092.782   Northing: 5677117.968    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O02NW

Point Location Description: Hole #4 located 560 m southeast of junction of creeks southeast of pond on Amoco grid map.

Location Method: Data Compilation

Access Description: This occurrence is located about 56 km southwest of Pickle Lake. It is approximately 3.5 km west of Duffell Lake and 4.4 km southeast of Dempster Lake. The occurrence can only be accessed by appropriately equipped aircraft to a nearby lake, and then an overland traverse. There is a small lake about 400 m south of the occurrence where it may be suitable for a helicopter to land.

Exploration History

Prior to 1983, Amoco Canada Petroleum Company Ltd. conducted reconnaissance exploration which identified anomalous concentrations of glacially distributed gold in an esker near this occurrence. 1983-84: Amoco Canada Petroleum Company Ltd. conducted 2 reverse circulation (RC) drilliing programs. Till samples from several holes indicated anomalous gold concentrations. Hole F-205 had 3 consecutive samples from the base of a single till unit return assays of 7.0 oz Au/ton 0.087 oz Au/ton and 0.202 oz Au/ton. The 3 samples totalled 3.9 m in length. The second program consisted of 24 tightly spaced RC drill holes to detail the area around hole F-205. Three holes returned till samples assaying over 1000 ppb Au. Amoco then followed up with a fence of 7 diamond-drill holes, which failed to find the source of the gold in the till. 1986: Milner Consolidated Silver Mines Ltd. optioned a group of 44 claims from Amoco Canada Petroleum Company Ltd. which included the area with the anomalous gold in till. !986: St. Joe Canada Inc. commissioned an airborne VLF-EM, HLEM, magnetometer and geological surveys on the optioned claims. Napoleon Petroleum Corporation obtained an interest in the property around this time. 1988: Napoleon Petroleum Corporation conducted a 9 hole diamond-drilling program on the optioned claims testing several geophysical anomalies and extending the fence of holes drilled by Amoco in the 'up-ice' direction.

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (B Nelson) - Outcrop in the area around this occurrence is scarce. The area is underlain by the Dempster Lake Gabbro in the west and by the Knupp Lake Stock to the east. The diamond-drilling and the geological mapping completed by the exploration companies indicate the area to be underlain by mafic-metavolcanic flows with metasedimentary interlayers including iron formation. These rocks are cut by felsic, often quartz and/or feldspar porphyritic dykes. The presence of the Knupp Lake Stock in the east was confirmed with the 1988 diamond-drilling. The glacial till which hosts the gold mineralization is composed of up to 60 percent volcanic pebbles, 30 percent granitic pebbles and 10 percent sedimentary pebbles in a light-grey clayey matrix. The gold grains in RC drill hole F-205 are described in the assessment files as extremely delicate in nature. This suggests a proximal source for the gold grains.

Lithology

Lithology Comments

Dec 07, 2005 (B Nelson) - Host rock to the gold is unknown. Mineralization of this occurrence found only in till, thus far.

Mineralization

Mineralization Comments

Dec 07, 2005 (B Nelson) - RC hole F-2053: samples totalling 3.0 m assaying 7.0 oz Au/ton, 0.087 oz Au/ton and 0.202 oz Au/ton. RC hole 4: 4990 ppb Au over 1.3 m from 7.0 m to 8.3 m. RC hole 18: 1395 ppb Au over 1.2 m from 4.0 m to 5.2 m. RC hole 24: 1185 ppb Au over 2.1 m from 0.0 m to 2.2 m.

Alteration Comments

Dec 07, 2005 (B Nelson) - Not known.

Mineral Record Details

References

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: 45  Date: 1993

Author: Seim G.Wm.

Publisher Name: Ontario Geological Survey

Location:

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