Ontario Geological Survey
Permanent Link to this Record:
MDI31C16NW00035
| Record Name(s) | South Sheridan - 1986, Map Area 746 - 1986 |
|---|---|
| Related Record Type | Simple |
| Record Status | Discretionary Occurrence |
| Date Created | 1990-Nov-09 |
| Date Last Modified | 2022-Jan-05 |
| Created By | Q Unknown |
| Revised By | A Wilson |
Primary Commodities: Marble (Building Stone)
Township or Area: Dalhousie
Latitude: 44° 57' 32.95" Longitude: -76° 27' 8.61"
UTM Zone: 18 Easting: 385448 Northing: 4979439 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31C16NW
Point Location Description: Point 1.8 km south of Sheridans Rapids.
Location Method: Data Compilation
Access Description: 3-4 kilometers west of Playfairville on County Road 12.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Sharbot Lake
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Marble | 1 | Dolomitic , Tremolite-Bearing | Is |
|---|
Sep 15, 2015 (A Wilson) - Marble in this detailed map area is predominantly light and dark grey laminated, with lesser amounts of dolomitic and white calcitic marble. Fine-grained grey marble in the area has minor visible impurities while coarser grained white marble contains visible pyrite, biotite, and minor amphibole. Outcrop is sparse in this area making it impossible to determine by examination of the surface geology alone the extent of white versus grey marble. Map area 746 tends to be dominated by fine-grained grey marble of high purity but low brightness. Map area 1912 has both white and light grey marble with only minor impurities occurring over a large area. It is possible that further investigation across strike would show an even larger amount of white marble. Up to 20 percent tremolite occurs in some outcrops and may be of interest as a by-product of marble extraction.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Tremolite | Economic | Ore |
Sep 15, 2015 (A Wilson) - Map area 746 tends to be dominated by fine-grained grey marble of high purity but low brightness. Map area 1912 has both white and light grey marble with only minor impurities occurring over a large area. It is possible that further investigation across strike would show an even larger amount of white marble. Up to 20 percent tremolite occurs in some outcrops and may be of interest as a by-product of marble extraction.
| Rank | Classification |
|---|---|
| 1 | Industrial |
| Rank | Characteristic |
|---|---|
| 1 | Stratiform |
Mono - Geochemistry of Grenville marble in southeastern Ontario
Publication Number: MDC028 Scale: Date: 1989
Author: Grant W.T., Papertzian V.C., Kingston P.W.
Publisher Name: Ontario Geological Survey
Map - Clarendon-Dalhousie-Darling area, counties of Frontenac and Lanark
Publication Number: M1956-04 Scale: 1:63,360 Date: 1997
Author: Peach P.A., Smith B.L.
Publisher Name: Ontario Dept. of Mines
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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office