Ontario Geological Survey
Permanent Link to this Record:
MDI31D16NW00237
| Record Name(s) | Trooper Lake Nepheline - 1938, Trooper Lake - 1938 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1981-Nov-26 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Nepheline Syenite
Secondary Commodities: Zircon
Township or Area: Glamorgan
Latitude: 44° 53' 32.52" Longitude: -78° 21' 4.68"
UTM Zone: 17 Easting: 709149 Northing: 4974407 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31D16NW
Point Location Description: Centre of nepheline outcrop in lot 31, con 3.
Location Method: Data Compilation
Access Description: A mile long band extending from north of Trooper Lake, and east almost to Laronde Creek.
Circa 1943 : the main nepheline occurrence in lot 32, con 3 (northeast part of the lot, 1/4 mi east of the farmhouse) was stripped over an area about 80 ft. in diameter. A pit (6 x 6 x 6 ft. deep) was sunk 10 chains east and 5 chains south of the farmhouse.
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
Jan 23, 2017 (C Papertzian) - Nepheline-bearing rocks extend in a 20 chain wide band for nearly 1 mile - from their contact with the metagabbro north of Trooper Lake, east to Laronde Creek. The predominant rock type is unusual in that it is dark in colour, due to abundant amphibole -nepheline-hornblende-plagioclase gneiss. Nepheline-bearing skarn occurs in lots 30N and 31N (where they contain grossularite and scapolite), the result of nephelinization of a gabbro-marble skarn. Nepheline-plagioclase rocks also comprise the north part and east slope of an arcuate ridge in the north half of lot 32 (continuing a few chains into the NW corner of lot 33). Two types of nepheline rock are present - firstly, a massive white albitite with variable nepheline (10-15 %) and, secondly, a nepheline-albite-pegmatite which forms irregular masses in the former type. Marble occurs as inclusions (up to several feet across) in these rocks.
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Syenitic | Contains |
|---|---|---|---|---|
| Gabbro | 2 | Metagabbro | Adjacent |
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Nepheline | Economic | Ore | ||||
| 2 | Zircon | Economic | Ore |
Jan 23, 2017 (A Wilson) - Nepheline varies from 10-50 % , averaging 25%. Theralite and theralitic canadite occur on the north shore of Trooper Lake. They are very dark in colour and display distinct laths of plagioclase. They also contain nepheline, titanaugite, hornblende, accessory apatite, magnetite and fayalitic olivine xenoliths of a pyroxene-plagioclase rock are also present. Zircons (up to 1/2 inch) occur in the nepheline-bearing albitite on the slope to the east (locally up to 5 %). The amount of nepheline in the main occurrence is so low that at the present time the deposit is of no economic importance.
Part - Mineral occurrences in the Haliburton area
Publication Number: ARV52-02 Page: 71 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
Book - Field Excursion A53-C53, p. 31,33-34
Publication Number: N/A Date: 1972
Author: International Geological Congress
Publisher Name: International Geological Congress
Location: Southeastern Ontario
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 233, 242 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Part - Nepheline syenite deposits of southern Ontario
Publication Number: ARV69-08 Page: 36, 42-43 Date: 1997
Author: Hewitt D.F., Armstrong H.S., Tilley C.E.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Glamorgan and Monmouth townships, Haliburton County
Publication Number: OFR5021 Page: 47-51 Date: 1997
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
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