Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI000000001961

Record: MDI000000001961

General

Commodities

Primary Commodities: Copper, Zinc, Silver, Gold

Location

Township or Area: Mussy Lake Area

Latitude: 48° 35' 17.26"    Longitude: -86° 5' 50.33"

UTM Zone: 16    Easting: 566567   Northing: 5382065    UTM Datum: NAD83

Resident Geologist District: Thunder Bay South

NTS Grid: 42D09NE

Point Location Description: 20000003728/20005618

Location Method: Based on Assessment

Access Description: The property is accessible by helicopter from the Marathon airport and by the Umbada Falls road from Highway 17 east of Marathon. A powerline transects the centre ofthe property in a northwest-southeast direction. The CPR mainline is located a short distance south of Trans-Canada Highway 17, approximately 6 km north of the property

Exploration History

2003: property was staked by MetalCORP Ltd. 2004: MetalCORP flew an airborne EM and magnetometer survey, carried out prospecting, and drilled 1 DDH totalling 210.33 m, discovering the B14 Zone. 2005: MetalCORP drilled a number of DDH and carried out a helicopter-borne EM and magnetometer survey. 2006: MetalCORP carried out prospecting, mapping, and drilled 23 DDH totalling 3771.5 m. 2007: MetalCORP drilled 15 DDH totalling 3474 m, and carried out mapping and sampling. 2008: MetalCORP carried out IP and mag surveys.

Assessment Work on File

Geology

Province: Superior

Subprovince: Wawa

Terrane: Wawa-Abitibi

Belt: Schreiber-Terrace Bay

Geological Age: Archean  

Lithology

Lithology Comments

Dec 21, 2018 (Andrew Tims) - An overturned, south-facing sequence with very strongly hydrothermally altered package of mafic/ultramafic metavolcanic rocks and minor interflow clastic metasedimentary rocks capped by a variably silicified siltstone unit. The altered and mineralized sequence is located immediately below the base of the younger, north-facing Big Lake Ultramafic Complex.

Mineralization

Mineralization Comments

Jul 11, 2016 (Andrew Tims) - The BL14 Zone closely resembles high temperature, Cu-rich, VMS stringer zones andis composed of a highly variable chlorite-brown mica-talc+/-anthophyllite+/-cordierite breccia containing from <5 to locally >80% stringers, pods, and semi-massive bands of chalcopyrite and pyrrhotite, up to 20% disseminated to streaked sphalerite, and minor galena. Typical intersection: 7.5% Cu, 2.2% Zn, 138.0 g/t Ag and 9.2 g/t Au over 4.0 m.metres

Dec 21, 2018 (Therese Pettigrew) - The BL14 Zone is variable in thickness, and the mineralized horizons consist of highly metamorphosed and altered ultramafic flows that contain disseminated, blebby and semi-massive sulfides. The sulfides occur entirely as disseminated and stringer-type mineralization. Most are in the footwall highly altered basaltic sequence but some seem to also occur within the sedimentary “cap rock”. The assemblage consists predominantly of pyrrhotite and chalcopyrite, with lesser sphalerite. The sulfide assemblage locally contains an unusually high gold content, and in examining the distribution of copper and zinc, it is not apparent that there is any well-developed zoning. The BL14 Zone closely resembles high temperature, Cu-rich, VMS stringer zones and is composed of a highly variable chlorite-brown mica-talc+/-anthophyllite+/-cordierite breccia containing from <5 to locally >80% stringers, pods, and semi-massive bands of chalcopyrite and pyrrhotite, up to 20% disseminated to streaked sphalerite, and minor galena. The footwall alteration zone consists of strongly to intensely altered mafic/ultramafic rocks, possibly komatiitic basalts, now composed of a diffusely banded package of chlorite-talc schists with highly variable, sometimes dominant amounts of green anthophyllite and brown mica (transitional between biotite and phlogopite). The discovery hole (drilled in 2006) of the BL14 VMS Zone assayed 7.5% Cu, 2.2% Zn, 138.0 g/t Ag and 9.2 g/t Au over 4.0 metres in hole 24. The massive sulphide zone was discovered while testing an EM conductor. Follow-up drilling (2006) to the discovery yielded even higher-grade base metal mineralization with the intersection of 4.4 metres (true width) assaying 8.2% Cu, 2.7% Zn, 140.0 g/t Ag, and 1.0 g/t Au from 107.0 to 111.4 metres in hole 32 from this zone. Further drilling in 2006 intersected 5.1 metres (true width) of high grade mineralization assaying 4.2% Cu, 1.2% Zn, 67.1g/t Ag, and 2.1 g/t Au from 91.3 to 96.4 metres in hole #34. This section included a higher-grade zone of 7.7% Cu, 2.2% Zn, 123.8 g/t Ag and 3.9 g/t Au (Assessment file 200000037280).

Mineral Record Details

References

Map - Geological Compilation of the Eastern Half of the Schreiber-Hemlo Greenstone Belt

Publication Number: M2614 Scale: 1:50,000    Date: 2000

Author: Muir T.L.

Publisher Name: Ontario Geological Survey

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Ministry Contact Information

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