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Ontario Geological Survey
Permanent Link to this Record:
MDI31F01NW00028
| Record Name(s) | West Almonte - 1990 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1991-Jun-11 |
| Date Last Modified | 2022-Dec-06 |
| Created By | |
| Revised By |
Primary Commodities: Marble (Structural Material)
Township or Area: Ramsay, Ramsay
Latitude: 45° 13' 9.96" Longitude: -76° 15' 44.33"
UTM Zone: 18 Easting: 400890.94 Northing: 5008101.98 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F01NW
Point Location Description: General, point 5.0 km west of Almonte.
Location Method: Data Compilation
Access Description: Sample site 1745 is 800 m west of Concession Road 7 on County Road 21, which runs west from Highway 29 about 3 km north of Almonte. Sample site 1758 is located on County Road 9, about 700 m south of the western end of County Road 21, at the junction with the Clayton Lake Road.
Province: Paleozoic and Mesozoic Basins
Subprovince: Central St. Lawrence Lowland
| Rock Type | Rank | Composition | Texture | Relationship | Dolomite Marble | 1 | Host |
|---|
Oct 13, 2017 (A Wilson) - The area is underlain by a belt of marble which extends through Lanark and Dalhousie townships to the southwest and beneath Paleozoic cover (Ordovician sandstone,limestone, and dolostone) to the northeast in the eastern half of Ramsay township. The marble belt contains both calcitic and dolomitic varieties and intercalated layers of amphibolite and gneiss. It is flanked to the northwest and southeast by amphibolitic and granitic gneisses and migmatites (Reinhardt and Liberty 1973). Marbles at the two sample locations in this area are pale grey to white, medium-grained, massive dolomite containing minor amounts of calcite, hematite, tremolite, mica, pyrite, and graphite. Samples 1745 and 1758 from Papertzian and Kingston (1982) are high-purity dolomites as indicated by the analyses below.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Dolomite | Economic | Ore | ||||
| 2 | Graphite | Economic | Gangue | ||||
| 3 | Tremolite | Economic | Gangue |
Mono - Precambrian dolomite resources in southeastern Ontario
Publication Number: OFR5712 Page: 105-107 Date: 1990
Author: LeBaron P.S., MacKinnon A.
Publisher Name: Ontario Geological Survey
Location:
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For detailed information regarding this mineral record please contact the Southern Ontario Resident Geologist District Office