Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001999

Record: MDI000000001999

General

Mineral Record Identification
Record Name(s)	I Zone - 1986, Dyke 10 - 1987
Related Record Type
Related Record(s)
Record Status	Prospect
Date Created	2016-Aug-18
Date Last Modified	2023-Feb-03
Created By
Revised By

Commodities

Primary Commodities: Gold

Location

Township or Area: Duckworth

Latitude: 48° 33' 31.59" Longitude: -90° 5' 23.54"

UTM Zone: 15 Easting: 714716.5 Northing: 5382498 UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52B09SE

Point Location Description: Sample A685565 in I Zone trench from Assessment report 20000019257

Location Method: Based on Assessment

Access Description: The prospect is easily accessible through an 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.

Exploration History

1896: In the Goldcreek 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. 1983-84: Jalna Resources Ltd completed a significant exploration over a large area of Duckworth and Laurie Townships including ground and airborne surveys, geological mapping, geochemical surveys, trenching, sampling and overburden drilling. Prospecting verified earlier anomalous gold showings in the area of the I Zone. 1984-85: Anaconda Canada Exploration Ltd. (“Anaconda”) followed up the work completed by Jalna with 3,665 feet (1117 m) of diamond drilling, in 13 holes and confirmed the anomalous gold values over the I-Zone. 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. The I Zone was target "I". 1988: Stripping and trenching was undertaken. 1989: A 1 km gravel road was constructed to the I-Zone. Further stripping and trenching, detailed mapping and detailed channel sampling (238 samples) over 150 linear feet (46 m) on the I–Zone and other parts of the syenite. A 1273 m of diamond drilling program consisting of 11 holes were carried out on the I-zone. A bulk cyanide test from the channel samples collected on the I-Zone and leached with cyanide over a 110 hour period demonstrating a recovery of 96.2% with an average grade of 1.05 g/t Au. 1995-97 Landore Resources Inc. carried out ground and airborne geophysics, mapping, stripping, channel sampling and a seven diamond drill hole program totalling 304.8 m. A cyanide leach of pulp from drill core returned an average of 6,75 g/t Au for a recovery of 92% confirming the leach test conducted by Inco in 1989. 2003: Landore completed a small mapping and prospecting program. 2006 HELM Resources Inc. completed a 498 line km airborne VTEM and total field magnetic survey over the Property. Scodnick and Allard completed a Beep Mat Survey over the I-Zone. 2007: Mengold Resources Inc. optioned the property and did reconnaissance geology, stripping and channel sampling in the South and the I Zones. Abitibi Geophysique completed 92.1 line-km of magnetometric (“Mag”); 75.1 line-km of Horizontal Loop Electromagnetic (“HLEM”) also referred to as MaxMin; and 22.8 line-km of Induced Polarization (“IP”) for Mengold. 2008: A stripping was done over Dyke #1 on the I Zone to extend the area already uncovered by Inco in the 1980s. 2020: Portofino Resources Inc. carried out prospecting and sampling.

Assessment Work on File

Assessment Work on File
Office File Number	Online Assessment File Identifier	Online Assessment File Directory
2.17721	52B09SE0093	52B09SE0093
2.36379	20000002517	20000002517
2.10955	52B09SE0032	52B09SE0032
2.35050	20000002677	20000002677
2.40426	20000003869	20000003869
2.39442	20000003511	20000003511
3880, 3881	20000019257	20000019257
22	52B09SE0016	52B09SE0016
2.18110	52A12SW2006	52A12SW2006
18	52B09SE0037	52B09SE0037
2.16790	52B09SE0041	52B09SE0041

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Shebandowan

Geological Age: Archean

Geology Comments

Aug 19, 2016 (Andrew Tims) - The I-Zone has a syenite to quartz-syenite dyke trending 070º with widths of 1.0 m to 5.0 m orange-grey, fine to medium grain, massive, equigranular, feldspar rich, with less than 1% disseminated pyrite. The syenite contacts with the argillaceous rhythmically banded iron formation are sharp and there may be some BIF xenoliths in the dykes as well having the dykes split. The syenites are well fractured and penetrated bynorth-northwest trending quartz-veins that generally have more pyrite (2% to 5%) adjacent to the veins.

Lithology

Lithology Data
Rock Type	Rank	Composition	Texture	Relationship
Syenite	1			Host
Ironstone-unsubdivided	2	Pyritic argillite and chert of BIF		Adjacent

Mineralization

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

Mineralization Comments

Aug 23, 2016 (Andrew Tims) - Two samples were collected from the I-Zone (dyke 10) within a syenitic dyke with a 5 cm wide quartz vein (5 cm) mineralized with 3% to 5% pyrite yeilding and assay of 6.46 g/t Au. Diamond drill hole 95-04 intersected 3.92 g/t Au over 41 m. JF Scott Field Visit: NAD27 15U 715112/5382523 Inco Dike 10 @ 18.7 g/ Au; NAD27 15U 714739/5382444 Inco X Zone Dike 26 @ 20.9 g/t Au; NAD27 15U 714701/5382498 Inco I-zone Qtz ladder veins in a syenitic dike intruding Temiskaming-type metaseds. Dyke 10 (I-Zone) was tested in 1987 and the hole DDH-74874 intersected a syenite dyke cut by quartz veining with traces of pyrite at 141.47 m assaying 1.98 ppm Au over 0.87 m. A second hole DDH-74875 intersected a syenite dyke with a pyrite band at 137.78 m assaying 2.47 ppm Au over 0.43 m and a third hole DDH-74876 intersected a syenite dyke cut by quartz veins with visible gold and traces of pyrite and chalcopyrite at 69.19 m assaying 3.28 ppm Au over 5.64 m. 2008: at the exposed western end of the syenite dyke the company produced a mini-bulk sample of approximately 1000 kg that returned an average gold grade of 9.9 g/t. Some selected samples throughout the dyke returned gold values between 22.3 and 234.0 g/t.

Jan 31, 2023 (Therese Pettigrew) - Sample A685565 collected in 2020 returned 45.6 g/t Au from a weakly silicified syenite with a 1 cm wide quartz vein and 1% pyrite (Assessment report 20000019257).

Mineral Record Details