Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI52K15NE00014

Record: MDI52K15NE00014

General

Commodities

Primary Commodities: Granite

Location

Township or Area: Slate Lake Area

Latitude: 50° 56' .67"    Longitude: -92° 33' 30.62"

UTM Zone: 15    Easting: 531023.632   Northing: 5642524.766    UTM Datum: NAD83

Resident Geologist District: Red Lake

NTS Grid: 52K15NE

Point Location Description: Outcrop

Location Method: Data Compilation

Access Description: GENERAL LOCATION: This site is located 63.1 km northeast of Ear Falls on the Wennesaga Road. ACCESS: The site is accessible from Ear Falls by an all-weather logging road.

Exploration History

The area has undergone little exploration or prospecting. 1994: this occurrence was held by the Economic Development Office of Ear Falls.

Geology

Province: Superior

Subprovince: Winnipeg River

Terrane: Winnipeg River

Geological Age: Archean  

Geology Comments

Dec 07, 2005 (W Bellinger) - Hinz and Lucas (1992) described the general geology: The area is underlain by rocks of the Winnipeg River (to the south), the English River (the centre) and Uchi Lake (to the north) subprovinces. The Winnipeg River Subprovince is composed of granitic intrusives and gneissic domes. The English River Subprovince consists of primarily metasedimentary migmatitic rocks. The Uchi Subprovince contains metasedimentary and metavolcanic belts with gneissic-intrusive complexes between the belts.

Lithology

Mineralization

Mineralization Comments

Dec 07, 2005 (W Bellinger) - A pinkish-brown (tan), medium-grained 'granite'. The body is very uniform in texture and colour with black, elongated crystals of amphibole (hornblende). The mineral constituents are: orthoclase (70%), plagioclase (15%), quartz (5%) and hornblende (10%). The outcrop was traversed several times and all samples were identical in composition and texture. JOINTING: Raoul (1992) provided a petrographic description of the stone: The northern and central portions of the area mapped were massive, with widely spaced (>5 m) joints (Figure 9). Two main joint directions were measured, 170 to 190 degrees and 234 degrees. Sheet joints ranged in thickness from 0.5 to 2.0 m. In the southern portion jointing ranged from 048 to 050 degrees and 330 to 340 degrees and were also widely spaced, sheeting was not observed. COLOUR: In outcrop the stone displays a pinkish-brown colour. When polished the stone is pink with a slight hint of brown (see Photo 10, Appendix A). TEXTURE: The stone has an equigranular, medium-grained texture. Typical grain sizes are no larger than 6 mm.

Mineral Record Details

References

Map - Geological series, Operation Kenora-Ear Falls, Papaonga-Wapesi lakes sheet, District of Kenora

Publication Number: P1200 Scale: 1:63,360    Date: 1997

Author: Breaks F.W., Bond W.D., Stone D., Harris N., Desnoyers D.W.

Publisher Name: Ontario Division of Mines

Location:

Mono - Dimensional Stone Occurrences and Deposits in Northwest Ontario

Publication Number: OFR5890 Date: 1994

Author: Hinz P., Landry R.M., Gerow M.C.

Publisher Name: Ontario Geological Survey

Location:

File - Industrial minerals geologist files

Publication Number: IMF Date: 1996

Author:

Publisher Name:

Location: Kenora RGP

Book - BUILDING STONE POTENTIAL,EAR FALLS AREA, UNPUBLISHED REPORT

Publication Number: UNP RPT Date: 1992

Author: Raoul, A.J.

Publisher Name:

Location: ECON DEV OFFICE, EAR FALLS

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Ministry Contact Information

For detailed information regarding this mineral record please contact the Red Lake Resident Geologist District Office