Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001082

Record: MDI000000001082

General

Commodities

Primary Commodities: Gold, Silver

Secondary Commodities: Lead, Copper

Location

Township or Area: Duckworth

Latitude: 48° 33' 35.75"    Longitude: -90° 7' 22.64"

UTM Zone: 15    Easting: 712271   Northing: 5382534    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52B09SE

Point Location Description: Field visit with GPS Confirmed with Google Earth

Location Method: Field Visit with GPS

Access Description: The occurence is easily accessible through the all-weather gravel road, the Duckworth road, which branches from the paved road leading to the former Inco Shebandowan Mine, some 2 kilometers from Highway 11. Access to area via the ATV driveable 518 road to the I Zone. After the I Zone trenches the trails may be accessible to the area of the occurence.

Exploration History

1896: In the Gold Creek area, gold was first reported by government geologist on the shores of Gold Creek. 1943-44: Gunflint Iron Mines Ltd. completed a surface work program of prospecting, channel sampling and 2,796 feet (852 m) of diamond drilling (12 holes) to test the Matawin iron formation, it was found that some gold mineralization was found in the general area of the I-Zone. 1956-57: Monpre Mining Company Ltd. explored a block of claims along the Matawin iron formation in central Duckworth and Laurie townships. Ground geophysics, geological mapping and 10,592 feet (3,228 m) of diamond drilling delineated 100 million tons of 30% Fe and an open pit mining pre-feasibility plan was prepared (Litchtblau 1997 and OGS 1995). The property went dormant until 1983 when the patented claims lapsed. 1967: M. Penziwol carried out trenching, sampling, and minor pack-sack drilling. 1977: Umex optioned the property and carried out sampling, VLF-EM surveys, and drilled 2 DDH totalling 152.4 m. 1982: M Penziwol restaked the property. 1983: J. Woynarski optioned the property as a joint venture and carried out prospecting and sampling. 1985: M. Penziwol carried out magnetometer and VLF-EM surveys. 1987: INCO Gold completed a geological and magnetometer survey over a large portion of Duckworth and Laurie Townships identifying fifteen areas of anomalous gold mineralization and/or strong alteration. 1988: Noranda optioned the property and carried out geological mapping, rock and humus sampling, and a radiometric survey. 1990: Inco carried out stripping and sampling. 1995: E. Fournier carried out prospecting and sampling. 2000: E. Fournier and M. Nantel carried out prospecting and sampling. 2006: 6531199 Canada Inc carried out line cutting, EM and Beep mat surveys, prospecting and sampling. 2007: Golden Share Mining Corp. conducted line cutting, IP and magnetometer surveys, prospecting, and sampling. 2008: Golden Share carried out prospecting, mapping, sampling, drilled 8 DDH totalling 485 m, and analyzed a 75 kg samples from channels at the U Zone. 2010: Golden Share conducted IP and resistivity surveys. 2011: Golden Share drilled 1 DDH totalling 252 m. 2019: First Minerals Exploration Ltd carried out a VLF-EM survey. 2020: Portofino Resources Inc. acquired the property and carried out prospecting and sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Shebandowan

Geological Age: Archean  

Geology Comments

Mar 16, 2011 (J Scott) - gold and chalcopyrite in quartz vein system intruding Temiskaning-type metasedimentary rocks. Veining is related to small felsic intrusive stocks.

Lithology

Mineralization

Mineralization Comments

Aug 22, 2016 (Andrew Tims) - Qtz veins up to 1.5 m and veinlets (mm to 8 cm) carry trace to 8% Py with minor Py pods, Cp and 1-3% fine galena. 1-3% disseminated Py in altered country rock.

Feb 01, 2023 (Therese Pettigrew) - Samples taken by OGS staff in 1972 returned 1.02 oz/t Au, 12.42 oz/t Ag from a quartz vein in a quartz and quartz feldspar porphyry. Galena (4.03%) and minor amounts of pyrite and chalcopyrite occur in some of the veins (Srivastava and Fenwick, 1973). Channel sampling in 2008 returned 0.92 g/t Au over 12 m including 1.84 g/t Au over 4 m, and 1.98 g/t Au over 7.8 m including 4.74 g/t Au over 3 m. The zone is a strong to intense, white, milky, weakly brecciated quartz vein structure with granodiorite xenoliths. It contains trace to 1% disseminated fine grained pyrite and galena and locally up to 3-5% over 10 to 20 cm sections. Visible gold was noted at one location, at 18, 8 m in hole EL-08-01. DDH EL-08-01 returned 2.38 g/t Au over 8.3 m (Assessment report 20000004304). Sampling in 1983 returned 0.328 o/z Au and 3.94 oz/t Ag over 5 feet. A high grade sample from blast rubble returned 1.128 oz/t Au and 11.7 oz/t Ag (Assessment report 52B09SE0046). In 2008, Golden Share Mining analyzed a 75kg sample from channels at the U Zone on the property. Four 1 kg charges averaged 0.61 gpt Au head grade (Assessment report 20000005508).

Mineral Record Details

References

Map - Geological series, Duckworth Township, District of Thunder Bay

Publication Number: P0825 Scale: 1:15,840    Date: 1973

Author: Srivastava P., Fenwick K.G.

Publisher Name: Ontario Division of Mines

Location:

Mono - Property visits and reports of the Atikokan economic geologist, 1979-1983, Atikokan geological survey

Publication Number: OFR5539 Page: 208-211  Date: 1985

Author: Schnieders B.R., Dutka R.J.

Publisher Name: Ontario Geological Survey

Location:

Map - Precambrian Geology, Duckworth Township

Publication Number: M2621 Scale: 1:20,000    Date: 1995

Author: Rogers M.C.

Publisher Name: Ontario Geological Survey

Location:

Map - Geological series, Precambrian geology, Laurie Township, District of Thunder Bay

Publication Number: P3083 Scale: 1:15,840    Date: 1987

Author: Carter M.W.

Publisher Name: Ontario Geological Survey

Location:

Mono - Geology of Adrian, Marks, Sackville, Aldina and Duckworth Townships, District of Thunder Bay

Publication Number: OFR5896 Date: 1994

Author: Rogers M.C., Berger B.R.

Publisher Name: Ontario Geological Survey

Location:

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