Mineral Deposit Inventory for Ontario

Ministry of Energy, Northern Development and Mines

Permanent Link to this Record: MDI31F12SW00040

Deposit: MDI31F12SW00040


Mineral Deposit Identification
Deposit Name(s) Plexman - 2000
Related Deposit Type None
Deposit Status occurrence
Date Created 1985-Nov-04
Date Last Modified 2005-Dec-07
Created By Q Unknown
Revised By C Papertzian


Primary Commodities: feldspar (nonmetals)


Township or Area: Dickens

Latitude: 45° 31' 47.14"    Longitude: --77° 52' 28.27"

UTM Zone: 18    Easting: 275543   Northing: 5045823    UTM Datum: NAD83

Resident Geologist District: Southeastern Ontario

NTS Grid: 31F12SW

Point Location Description: Diamond symbol ' P 32 ', just S of Hwy 60.

Location Method: conversion from mdi


Sources Map Scale: 1:125 000

Access Description: Reached by a 390 m traverse through the bush from Hwy 60, at a point 780 m W of the Spectacle Lake road.

Exploration and Mining History

Pre 1954 : the history and procuction of this deposit is unknown. 1954 : old feldspar pits in the immediate vicinity of the deposit were prospected by A.E.Plexman.


Province: Grenville

Geology Comments

8/21/2000 (C Papertzian) - The area is underlain by rocks of the Algonquin Batholith. A zoned pegmatite dyke, hosted in gneiss, with a width of 0.6 m (SE end) to 6 m and a probable length of 38 m, has been worked for feldspar. It is similar to the Madawaska River deposit and has a spur of graphitic granite that extends to the NE. Where the dyke has been trenched it contains about 20 % feldspar. See MDC 22 for a detailed description and section. Aeschynite is associated with biotite in the pegmatite over a 2 m sq area.

Mineral Deposit Lithology

Lithology Data
Rock Type Rank Composition Texture Relationship
felsic intrusive 1 pegmatite contains


Deposit Mineralization and Alteration
Rank Mineral Name Class Economic Mineral Type Alteration Mineral Type Alteration Ranking Alteration Intensity Habit Description
1 microcline economic ore n/a
2 quartz economic ore n/a


Book - OGS 1981, MDC 22, P159-61+MAP P2209

Publication Number: N/A    Date: 1996

Book - OGS 1981, MDC 23, P44-46+MAP P2210

Publication Number: N/A    Date: 1996

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Ministry Contact Information

For detailed information regarding this mineral deposit please contact the Southern Ontario Resident Geologist District Office