Ontario Geological Survey
Permanent Link to this Record:
MDI31D16NW00046
| Record Name(s) | Rustystone Nepheline - 1910 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Discretionary Occurrence |
| Date Created | 1981-Dec-02 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Nepheline Syenite
Township or Area: Glamorgan, Glamorgan
Latitude: 44° 53' 11.78" Longitude: -78° 23' 11.27"
UTM Zone: 17 Easting: 706393 Northing: 4973677 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31D16NW
Point Location Description: Outcrop 2.5 km north of southern boundary and 0.96 km west of concession symbol '3'.
Location Method: Data Compilation
Access Description: Nepheline belt extends from lot 13, con 1 to lot 23, con 4, Glamorgan, and occurs in 4 well-defined localitites in this western portion of the main belt.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
Jan 26, 2017 (C Papertzian) - Nepheline-biotite-plagioclase gneiss, white-pink in colour, occurs in 4 well-defined localitites within this west portion of the main syenite gneiss belt. The syenite gneiss is about 6 chains wide at the southern boundary of the township, about 15 chains to the north. Along most of its length the nepheline rock lies on a footwall of hornblende syenite gneiss and is overlain by biotite gneiss. The southern-most occurrence is only a few small outcrops of a nepheline-poor biotite-syenite gneiss. The next occurrence, to the north, extends continuously for 45 chains, tapering from 4 chains at its central area to about 1 chain at each end. Nepheline ranges from sparse to 10 %. There is development of pyroxene-garnet skarn in the marble of the south part. The third occurrence lies about 7 chains to the northwest of the trail to the fire tower on Greens Mountain. This body is almost pear-shaped, 6 chains wide in the southwest and 1 chain wide in the northeast (25 chains long). This is also a nepheline-poor gniess. The northmost occurrence consists of a narrow belt of many outcrops extending for 100 chains. Nepheline rocks are found across a width of 1-2 chains, 8 chains in the S. The nepheline-poor rocks are mostly biotite-plagioclase gneisses containing sparse nepheline, though the content can vary. This is band 2 in the text.
| Rock Type | Rank | Composition | Texture | Relationship | Gneiss-Unsubdivided | 1 | Nepheline-Biotite-Plagioclase Gneiss | Host |
|---|---|---|---|---|
| Paragneiss | 2 | Intrudes | ||
| Marble | 3 | Phlogopite | Intrudes |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Nepheline | Economic | Ore |
MonoMap - Geology of Glamorgan and Monmouth townships, Haliburton County
Publication Number: OFR5021 Page: 40-42 Date: 1997
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Nepheline syenite deposits of southern Ontario
Publication Number: ARV69-08 Page: 36-38 Date: 1997
Author: Hewitt D.F., Armstrong H.S., Tilley C.E.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Geology of the Haliburton and Bancroft Areas; Geological Survey of Canada, Memoir no. 6
Publication Number: GSC Memoir 6 Page: 287 Date: 1910
Author: Adams, F. D. and; Barlow, A. E.
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/100481
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