Ontario Geological Survey
Permanent Link to this Record:
MDI52A06SW00004
| Record Name(s) | Mount McKay Shale - 1918 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1983-Sep-06 |
| Date Last Modified | 2022-Apr-27 |
| Created By | |
| Revised By |
Primary Commodities: Shale (Structural Material)
Township or Area: Pie Island Area
Latitude: 48° 20' 43.23" Longitude: -89° 17' 3.63"
UTM Zone: 16 Easting: 330743.97 Northing: 5357206.29 UTM Datum: NAD83
Resident Geologist District: Thunder Bay South
NTS Grid: 52A06SW
Point Location Description: General
Location Method: Conversion from MDI
For a short time, a brickmaking plant was operated at the base of Mount McKay, using for its materials Animikie shales and greywackes in the talus nearby. Operations were suspended in 1919.
Province: Southern
Formation Group: Animikie Group
Geological Age: Paleoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Wacke | 1 | Is |
|---|---|---|---|---|
| Ironstone-unsubdivided | 1 | Gunflint Formation Is Underneath Rove Shales | Footwall | |
| Clayey Siltstone | 1 | Rove Shale | Medium Grey To Oxidized Yellow-Buff | Is |
Mar 01, 2018 (Therese Pettigrew) - The Animikie shale is the oldest shale that has been used for clay products in this area. It is brittle and grades in places to slate. Animikie rocks are relatively flat-lying and overlie Early Precambrian granite and older basement rocks. Rocks of the Animikie Group are divided into three formations: The Kakabeka Conglomerate is the thin basal formation. It is overlain by the Gunflint Formation consisting of taconite (iron formation), carbonate rock, and some shale. The Rove Formation overlies the Gunflint and consists largely of shale; it is known to exceed 360 m in thickness. Shales of the Rove Formation are grey-black, medium- to very thin-bedded, fissile weathering, brittle rocks, interbedded in some places with layers of siltstone and greywacke. The shales weather to medium grey, except in the upper few feet of outcropping sections where they are oxidized to yellow-buff (Guillet, 1977). At this locality, the Rove sediments are capped by a 61 m thick, flat-lying diabase sill. A 4.6 m tick diabase sill is also interlayered with the shales 122 m below the top and about 244 m of shales and greywackes are exposed (Vos et al., 1982).
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Quartz | Economic | Gangue | ||||
| 2 | Dolomite | Economic | Gangue | ||||
| 3 | Illite | Economic | Gangue | ||||
| 4 | Chlorite | Economic | Gangue |
Mar 01, 2018 (N Bennett) - Flattenned spheroidal concretions up to 2m in diameter and 1m thick are locally common in the Rove Shale. They are composed mainly of calcium carbonate, apparently leached from limy layers in the shale, and have formed since the deposition of the shale, distorting the bedding both above and below. Quartz constitutes one-third of the average sample and dolomite is a very minor constiuent. Iron ranges between 5-8% (Fe2O3), except in the siliceous iron-rich varieties more properly called taconites. Of the clay minerals, illite is abundant and chlorite occurs in moderate amount. Animikie rocks also contain various layered minerals structurally relatd to the clays. (Guillet, 1977. p.43)
| Rank | Classification |
|---|---|
| 1 | Sedimentary |
Publication - Preliminary Report on the Clay and Shale Deposits of Ontario; Geological Survey of Canada, Memoir 142
Publication Number: GSC Mem 142 Page: 125-129, 134 Date: 1924
Author: Keele, J.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100854
Publication - Fort William and Port Arthur, and Thunder Cape Map-area, Thunder Bay District, Ontario; Geological Survey of Canada, Memoir 167
Publication Number: GSC Memoir 167 Page: 200 Date: 1931
Author: Tanton, T.L.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100799
Mono - Industrial minerals of northern Ontario-supplement 1
Publication Number: OFR5388 Page: 42 Date: 1982
Author: Vos M.A., Abolins T., Smith V.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Clay and shale deposits of Ontario
Publication Number: MDC015 Page: 44 Date: 1977
Author: Guillet G.R.
Publisher Name: Ontario Geological Survey
Location:
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