Ontario Geological Survey
Permanent Link to this Record:
MDI000000001256
| Record Name(s) | Highway 41 Area - 1981, Sample PM-93 - 1981 |
|---|---|
| Related Record Type | |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 2011-Jun-02 |
| Date Last Modified | 2022-Nov-08 |
| Created By | |
| Revised By |
Primary Commodities: Marble (high purity/flux)
Township or Area: Brougham, Grattan
Latitude: 45° 21' .33" Longitude: -77° 1' 8.23"
UTM Zone: 18 Easting: 341847.997 Northing: 5023824.997 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F06SE
Point Location Description: approximate
Location Method: Data Compilation
Province: Grenville
Subprovince: Central Metasedimentary Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Marble | 1 | Dolomitic | Is |
|---|
Jun 09, 2011 (A Wilson) - A northeasterly-trending belt of marble about l km wide is flanked to the southeast by the Mount St. Patrick syenite pluton and to the northwest by massive to gneissic, pink potassic syenite. The marble belt contains bands of amphibolite, quartz-feldspar gneiss, and quartz-feldspar pegmatite in addition to calcitic and dolomitic marbles. The rock at this site is described as clean white, coarse-grained dolomitic marble with a little mica. The unit is about 20 m thick. The outcrop from which samples PM-91, PM-93, and MA 13-1 were taken consists of interlayered calcitic and dolomitic marble units from 30 cm to 2 m wide. The layering is most evident on the weathered surface, where the medium-grained calcitic marble weathers slightly lower than the more coarse-grained dolomitic marble. Both types generally contain less than 3% impurities (phlogopite, diopside, muscovite, pyrite, and graphite). Sample PM-93 is from a greenish (diopside-bearing) patch in similar marble, and MA 13-1 is a coarse-grained, pale blue dolomite. This zone and a dolomitic zone of similar width about 600 m south indicate potential for narrow widths of high-purity dolomite within this area.
Jun 09, 2011 (A Wilson) - Grab sample PM-93 returned 9.59% SiO2, 0.01% Al2O3, 0.2% Fe2O3, 18.5% MgO, 33.4 CaO with a brightness of 90.1. Serpentine was noted in the sample and the carbonate is cloudy and altered around grain boundaries.
| Rank | Classification |
|---|---|
| 1 | Industrial |
MonoMap - Marbles of the Pembroke-Renfrew area
Publication Number: MP080 Page: 6-7 Date: 1979
Author: Vos M.A., Storey C.C.
Publisher Name: Ontario Geological Survey
Location:
Mono - Precambrian dolomite resources in southeastern Ontario
Publication Number: OFR5712 Page: 58-60 Date: 1990
Author: LeBaron P.S., MacKinnon A.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 177 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Pembroke-Renfrew area, part 1: marble
Publication Number: MDC021 Page: 59-61, 102 Date: 1981
Author: Storey C.C., Vos M.A.
Publisher Name: Ontario Geological Survey
Location:
Map - Khartum, Renfrew County
Publication Number: M2454 Scale: 1:31,680 Date: 1981
Author: Themistocleous S.G.
Publisher Name: Ontario Geological Survey
Location:
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