Ontario Mineral Inventory

Ontario Geological Survey
Permanent Link to this Record: MDI31F04NW00006

Record: MDI31F04NW00006

General

Mineral Record Identification
Record Name(s)	Salmon Trout Lake - 1986
Related Record Type	Simple
Related Record(s)
Record Status	Discretionary Occurrence
Date Created	1986-May-20
Date Last Modified	2023-Jun-12
Created By
Revised By

Commodities

Primary Commodities: Feldspar (Nonmetals)

Secondary Commodities: Rare Earth Elements, Cerium

Location

Township or Area: Monteagle

Latitude: 45° 11' 13.64" Longitude: -77° 48' 23.23"

UTM Zone: 18 Easting: 279530.274 Northing: 5007569.549 UTM Datum: NAD83

Resident Geologist District: Southern Ontario

NTS Grid: 31F04NW

Point Location Description: Precise

Location Method: Conversion from MDI

Access Description: The pegmatite is exposed on the top of a hill on the east side of Salmon Trout Lake. The pit is on the hydro line just past the end of the cottage road along the east side of the lake (MDC 22, p143).

Lithology

Lithology Data
Rock Type	Rank	Composition	Texture	Relationship
Pegmatite	1			Host
Amphibolite	2			Adjacent

Lithology Comments

Jun 12, 2023 (Therese Pettigrew) - At the north end of Lot 14, Concession 8, Monteagle Township, there is a small open cut on a granite pegmatite dike. This open cut is located near the top of the north face of a steep hill over looking Salmon Trout Lake. It measures 30 by 40 feet in diameter and has two steps, of 6 feet, cut into the hillside. The granite pegmatite cuts amphibolite and can be traced for 400 feet to the west along the face of the ridge (Hewitt, 1955).

Mineralization

Mineralization and Alteration
Rank	Mineral Name	Class	Economic Mineral Type	Alteration Mineral Type	Alteration Ranking	Alteration Intensity	Alteration Style
1	Feldspar	Economic	Ore
2	Allanite	Economic	Ore

Mineralization Comments

Jun 12, 2023 (Therese Pettigrew) - The pegmatite consists of potash feldspar, quartz, and soda spar, with rare allanite. There is too much graphic granite present in the dike for it to be of commercial interest as a feldspar deposit (Hewitt, 1955). :The pegmatite in the pit is a homogeneous pink quartz-feldspar pegmatite. The predominant feldspar is microcline with a little albite (5 percent). Most of the microcline crystals contain some quartz intergrowth. The microcline occurs as 0.3 to 1 m masses surrounded by quartz-feldspar intergrowth and grey quartz. Quartz in segregations is estimated at 10 percent; more is present as part of the intergrowth. There is almost continuous outcrop of pegmatite for 60 m west of the hydro line until it is lost in overburden. An old stripping on the face of the hill exposes the pegmatite. There is an irregular contact with the gneiss at the east side of the pit. The pegmatite dips to the south into the hill. The thickness of the body is not exposed, but is in excess of 4 m (Storey and Vos, 1981).

Mineral Record Details

References

Part - Geology of Monteagle and Carlow townships

Publication Number: ARV63-06 Page: 49 Date: 1998

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:

Mono - Pegmatite mineral resources of Ontario

Publication Number: IMR021 Page: 20 Date: 1997

Author: Hewitt D.F.

Publisher Name: Ontario Dept. of Mines

Location:

Map - Geological series, industrial minerals of the Pembroke-Renfrew area, southern Ontario

Publication Number: P2209 Scale: 1:126,720 Date: 1980

Author: Vos M.A., Storey C.C.