Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52O08NE00012

Record: MDI52O08NE00012

General

Commodities

Primary Commodities: Copper, Zinc

Secondary Commodities: Nickel

Location

Township or Area: Dona Lake Area

Latitude: 51° 23' 53.2"    Longitude: -90° 1' 58.24"

UTM Zone: 15    Easting: 706396.94   Northing: 5698276.17    UTM Datum: NAD83

Resident Geologist District: Thunder Bay North

NTS Grid: 52O08NE

Point Location Description: N/A

Location Method: Conversion from MDI

Exploration History

1960: Airborne geophysical surveys, geological survey and prospecting by Monpre Mining Company. 1967: diamond drilling by N. Firth.

Assessment Work on File

Geology

Province: Superior

Subprovince: Uchi

Terrane: North Caribou

Domain: Uchi

Belt: Pickle Lake

Geological Age: Neoarchean  

Geology Comments

Feb 08, 2007 (Mark Puumala) - The supracrustal rocks of the southeastern portion of the Pickle Lake Greenstone Belt have been classified by Young (2003) as being part of the approximately 2744 Ma Confederation Assemblage (Young 2003). The rocks at the base of this east-facing assemblage are dominated by pillowed mafic volcanic flows that are geochemically distinct from those found further to the west in the Pickle Crow Assemblage (Young 2003). The Confederation Assemblage also contains significant units of intermediate to felsic metavolcanic rocks that include tuff, lapilli tuff and agglomerate. The supracrustal rocks are bounded to the southeast by granitic rocks of the Quarrier Tonalite Gneiss domain (Stott 1996). Mapping in this area by Stott et al. (1989) indicates that the dominant lithology is mafic metavolcanics, with subordinate amounts of intermediate to felsic meatavolcanics. A geophysically-inferred iron formation has also been mapped in the area. Stratigraphy and foliation generally strike northeast with steep (generally approximately 80 degrees) northwesterly dip.

Lithology

Mineralization

Mineralization Comments

Feb 08, 2007 (Mark Puumala) - This discretionary occurrence is based on the reported occurrence of significant sulphide mineralization in four diamond drill holes (67-1, 2, 3A and 4) advanced in this area by N. Firth in 1967. Assay results from these diamond drill holes were reported to contain sub-economic concentrations of copper, zinc and nickel. Diamond drill hole logs indicate the presence of significant pyrrhotite and/or pyrite mineralization (i.e., massive to semi-massive sections) within the mineralized rhyolite horizon. Chalcopyrite and sphalerite were also noted in a number of mineralized intervals which also contained anomalous copper and zinc assays (up to 0.16% Cu and 0.41% Zn). Silicification and graphite are also reported in some of the sulphide mineralized sections.

Mineral Record Details

References

Map - Geological series, Precambrian geology, Pickle Lake area, western part

Publication Number: P3056 Scale: 1:50,000    Date: 1989

Author: Stott G.M., Brown G.H., Coleman V.J., Green G.M., Reilly B.A.

Publisher Name: Ontario Geological Survey

Location:

Book - New Structural, Geochronological, and Geochemical Constraints on the Tectonic Assembly of the Archean Pickle Lake Greenstone Belt, Uchi Subprovince, Western Superior Province

Publication Number: Scale:     Date: 2003

Author: Young, M.D.

Publisher Name: unpublished thesis, Queen¿s University, Kingston, Ontario, 182p.

Location:

Mono - The Geology and Tectonic History of the Central Uchi Subprovince

Publication Number: OFR5952 Scale:     Date: 1996

Author: Stott G.M.

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