Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52H03NW00002

Record: MDI52H03NW00002

General

Commodities

Primary Commodities: Gold

Secondary Commodities: Iron, Zinc

Location

Township or Area: Max Lake Area

Latitude: 49° 10' .16"    Longitude: -89° 26' 39.38"

UTM Zone: 16    Easting: 321825   Northing: 5448865    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 52H03NW

Point Location Description: Fat Beagle trench

Location Method: Data Compilation

Access Description: A logging road that trends SE from Highway 527 at a point 940 m south from the Lac des Iles mine road/Highway 527 junction leads directly to the property.

Exploration History

1971: Dome Exploration Canada Ltd. conducted an airborne mag geophysical survey. 1972: Dome drilled 2 DDH totalling 167.9 m. 1990: Metalstake Resources carried out sampling and prospecting. 1995-6: D.E. Christianson conducted stripping, trenching and sampling. 2011: North American Palladium Ltd. carried out prospecting, mapping, and sampling. 2012: North American Palladium drilled 3 DDH totalling 714 with 2 DDH undercutting the Beagle trench. Minfocus Exploration Corporation conducted prospecting, geological mapping, and sampling. 2021: Transition Metals conducted an airborne magnetic survey, mapping, sampling, and MMI soil sampling.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wabigoon

Belt: Lac des Iles

Geological Age: Archean  

Geology Comments

Jun 06, 2023 (Therese Pettigrew) - The Jolly Gold Property is underlain by volcanic and metasedimentary rocks of the Lac des Iles greenstone belt within the Wabigoon subprovince, in the western Superior Province. The Wabigoon subprovince is composed of volcanic-dominated domains with a central axis of plutonic rocks of various ages that has been divided into western and eastern domains separated by rocks of Mesoarchean ancestry. The Lac des Iles greenstone belt occurs in the southeastern part of the western Wabigoon subprovince, consisting of three panels of predominantly mafic metavolcanic rocks separated by clastic metasedimentary sequences. The belt has lithological and geochemical similarities to the Beardmore-Geraldton greenstone belt, east of Lake Nipigon. Isotopic studies suggest a ~3000 Ma component to the volcanic rocks of the belt placing the belt within the Marmion terrane. The western Wabigoon is bounded to the south by metasedimentary rocks of the Quetico terrane (Percival et al., 2006; Tomlinson et al., 2003). The Jolly Gold Property is underlain by northeast-trending, south-facing metavolcanic rocks divided into a northern and southern assemblage. The northern assemblage consists of mafic metavolcanic flows overlain by intermediate pyroclastics, capped to the south by a sulphide facies iron formation. The southern assemblage consists of mafic metavolcanic flows, pyroclastic and volcaniclastic units, with minor thin intermediate pyroclastics. Gabbro sills intrude the mafic metavolcanic rocks of both assemblages, and a layered gabbro intrudes the eastern edge of the southern assemblage. A small feldspar porphyritic granodiorite intrudes the metavolcanics and felsic plutonic rocks bound the belt to the north. Conglomerates of the Quetico metasedimentary sequence bound the belt to the south. Discontinuous diabase sills of the Proterozoic Nipigon Sill Complex, and related north-trending porphyritic diabase dykes, intrude or overlie all other units in the belt. Quaternary deposits form a discontinuous cover over the belt. The metamorphic grade varies from greenschist facies for most of the belt to amphibolite facies along the northern margin with the felsic plutonic rocks (Hart and MaDonald, 2000).

Lithology

Lithology Comments

Jan 18, 2018 (Therese Pettigrew) - The trenches expose a shear zone with quartz stringers in biotite-altered metavolcanic rock, very fractured, with silica and carbonate hydrothermal alteration, and some rusty, sugary quartz (AFRI 20000007548). The trench is underlain mainly by northeast-trending basalt, with thin lenses or horizons of sandstone, and crosscut by north trending diabase dykes. The basalt appears sheared and foliated along a northeast to east-northeast-trend with moderate dip to the north and south. Cleavages trend north-south and dipping steeply. Bedding trends northeast dipping 31°- 46° southeast (Assessment report 20000020390).

Mineralization

Mineralization Comments

Jan 18, 2018 (Therese Pettigrew) - Grab samples collected in 1995 returned assayed up to 2.189 opt Au (75.05 ppm Au). The highest assay from the 1996 sampling program was 38.013 ppm Au, in a sulphidic, crumbly metavolcanic rock (Assessment report 20000007548). There is mention in Pye (1968) of a test pit at this location, with 5 feet of chlorite schist mineralized with about 10% pyrrhotite and pyrite concentrated in thin but closely-spaced streaks and lenses. The iron formation contains up to 40% pyrrhotite, pyrite, and magnetite, and assayed up to 0.1% Zn (Assessment report 52H03NW0017). In 2021, analytical results for the Fat Beagle returned up to 146.5 g/t Au over 0.41 m, and 24.4 g/t Au over 0.61 m associated with east-west-trending, quartz ± carbonate veins and veinlets, structural intersections, and gossanous zones (Assessment report 20000020224).

Assay Samples

Mineral Record Details

References

Journal - Tectonic evolution of the western Superior Province from NATMAP and Lithoprobe studies; Canadian Journal of Earth Sciences, V.43

Publication Number: CJES v.43 Page: 1085-1117  Date: 2006

Author: Percival, J.A., Sanborn-Barrie, M., Skulski, T., Stott, G.M., Helmstaedt, H., and White, D.J.

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MonoMap - Geology of Lac des Iles area, District of Thunder Bay

Publication Number: R064 Page: 34  Date: 1968

Author: Pye E.G.

Publisher Name: Ontario Dept. of Mines

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Journal - U–Pb age and Nd isotopic evidence for Archean terrane development and crustal recycling in the south-central Wabigoon subprovince, Canada; Contributions to Mineralogy and Petrology v.144

Publication Number: CMP v.144 Page: 684-702  Date: 2003

Author: Tomlinson, K.Y., Davis, D.W., Stone, D., and Hart, T.R

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