Ontario Geological Survey
Permanent Link to this Record:
MDI31E01SE00198
Record Name(s) | Highland Mercury Occurrence - 1976, Desmont Mining Corporation - 1955, B.E. MacDougall - 1942 |
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Related Record Type | Simple |
Related Record(s) | |
Record Status | Discretionary Occurrence |
Date Created | 1981-Sep-17 |
Date Last Modified | 2023-Jun-12 |
Created By | |
Revised By |
Primary Commodities: Molybdenum
Secondary Commodities: Uranium, Thorium, Rare Earth Elements
Township or Area: Monmouth, Monmouth
Latitude: 45° 2' 24.97" Longitude: -78° 14' 24.22"
UTM Zone: 17 Easting: 717373 Northing: 4991130 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31E01SE
Point Location Description: Precise
Location Method: Data Compilation
Access Description: The occurrence is located in the northeastern part of the township.
1942: B.E. MacDougall - stripping and shallow test pits for molybdenum. 1954: Homer Yellowknife Mines, Limited - surface prospecting, scintillometer survey, trenching, DD-17-2810 ft. 1955: Desmont Mining Corporation -, stripping and trenching. 1965: Molybdenum Corporation of Canada - geochemical survey and DD-13-3200 ft. 1976-77: Highland Mercury Mines, Limited - pitting, trenching, sampling, geological survey. 1979: Lacana Mining Ltd. - geophysical survey (radiometric). 1998-1999: Christopher Fouts, Bancroft and District Chamber of Commerce - Trenching, radiometric survey, geological mapping for mineral specimens
Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
---|---|---|
#108 Monmouth - 2.2997 | 31E01SE0201 | 31E01SE0201 |
#143 Monmouth - 2.18994 | 31D16NW2002 | 31D16NW2002 |
#146 Monmouth 2.19831 | 31E01SE2003 | 31E01SE2003 |
#18 | 31E01SE0162 | 31E01SE0162 |
#36 | 31D01SW0061 | 31D01SW0061 |
OP92-244 | 31F07SW0001 | 31F07SW0001 |
2.18985 | 31E01SE2001 | 31E01SE2001 |
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Bancroft
Geological Age: Mesoproterozoic
Rock Type | Rank | Composition | Texture | Relationship | Marble | 1 | Skarn | Contains |
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Gneiss-Unsubdivided | 2 | Micaceous | Contains | |
Pegmatite | 3 | Granitic | Intrudes |
Feb 11, 2017 (A Wilson) - The property is underlain by marble containing interbands of diopside rock, lime-silicate rock, and rusty mica gneisses. These rocks strike north-northwest and dip 45-60º E. They are cut by irregular bodies of granite pegmatite. The main zone extends 900 m.
Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
---|---|---|---|---|---|---|---|
1 | Uraninite | Economic | Ore | ||||
3 | Thorianite | Economic | Ore | ||||
4 | Graphite | Economic | Ore | ||||
5 | Goethite | Economic | Ore | ||||
6 | Molybdenite | Economic | Ore | ||||
7 | Monazite | Economic | Ore | ||||
8 | Pyrrhotite | Economic | Ore | ||||
9 | Pyrite | Economic | Ore | ||||
10 | Sphalerite | Economic | Ore | ||||
11 | Uranothorite | Economic | Ore | ||||
12 | Titanite | Economic | Ore | ||||
2 | Garnet | Economic | Gangue | ||||
3 | Allanite | Economic | Gangue |
Feb 11, 2017 (A Wilson) - Uranothorite occurs in diopside or diopside-calcite rock within marble. Uraninite is sparsely disseminated in lime-silicate bands in marble or in micaceous marble. Allanite, molybdenite, pyrrhotite and pyrite are present. Traill reports terminated dravite crystals in disintegrated green diopside rock at the east showing of Desmont Mining Corporation. Radioactive mineral occurrences of two types have been found on the property. The first type is in the bands of pale-green diopside rock or diopside-calcite rock in the marble. These bands contain erratic and sparse disseminations of uranothorite. This type is represented by the main and east showings. The second type consists of sparse disseminations of uraninite in lime-silicate bands in marble or in micaceous marble as at the west showings. The main showing is on a high ridge on lot 31, concession XVII. Along this ridge bulldozed areas and trenches expose a sugary pale-green diopside rock or diopside-calcite rock as an interbed in marble at intervals for 2,700 feet. This assemblage is cut in places by dikes of granite pegmatite. Geiger readings on the diopside band were 5x-7x, with spot-highs of 25x-40x. The workings indicate a series of disconnected bands of diopside rock containing irregular lenses and stringers of salmon-pink calcite. Accessory minerals are uranothorite, molybdenite, pyrite, and pyrrhotite. The west showing is on the east slope of a ridge in lot 30, concession XVII, and has been explored by trenches and bulldozed strippings. These trenches expose deeply weathered micaceous marble, rusty paragneiss, and a vertical lime-silicate band about four feet wide trending N. 20º W. over a length of 200 feet. Geiger readings on the micaceous marble were slightly above back ground. On the silicate horizon spot-high readings of 3x to 4x were recorded and a little uraninite in irregular grains, ¼ to ½ inch across, was found in one trench. Assays average approximately 0.004% U3O8 (chemical). MoS2 values range from 0.016% to 0.44% in the main zone.
Dec 07, 2005 (D Laidlaw) - Also stillwellite, hydroxylbastnaesite.
Jun 12, 2023 (Therese Pettigrew) - The main zone extends 900 meters, the east zone 400 meters. Assays average approximately 0.004% U3O8 (chemical). MoS2 values range from 0.016% to 0.44% (Gordon et al., 1981).
Rank | Classification |
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1 | Pegmatite |
Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
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Tabular | 400 |
Shape | Length | Thickness | Depth | Strike | Dip | Plunge | Trend | Age | Reference |
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Unknown | 900 |
File - Resident Geologist file #152 Monmouth (OP99-117)
Publication Number: Date:
Author:
Publisher Name:
Location: Tweed RGP office
Map - Monmouth Township, Haliburton County
Publication Number: M2174 Scale: 1:31,680 Date: 1970
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Radioactive mineral occurrences in the Bancroft area
Publication Number: ARV65-06 Page: 86-88 Date: 1998
Author: Satterly J., Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: MDC004 Page: 28 Date: 1967
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Geology of Glamorgan and Monmouth townships, Haliburton County
Publication Number: OFR5021 Page: 154-157 Date: 1997
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: OFR5311 Page: 138-139 Date: 1981
Author: Gordon J.B., Rybak U.C., Robertson J.A.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Algonquin region
Publication Number: OFR5425 Page: 287 Date: 1983
Author: Martin W.
Publisher Name: Ontario Geological Survey
Location:
Mono - Molybdenum deposits of Ontario
Publication Number: MDC007 Page: 35 Date: 1968
Author: Johnston F.J.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Metallogeny of the Grenville Province, southeastern Ontario
Publication Number: OFR5515 Page: 136 Date: 1984
Author: Carter T.R.
Publisher Name: Ontario Geological Survey
Location:
Part - Mineral occurrences in the Haliburton area
Publication Number: ARV52-02 Page: 69 Date: 1998
Author: Satterly J.
Publisher Name: Ontario Dept. of Mines
Location:
Publication - Molybdenum deposits of Canada; Geological Survey of Canada, Economic Geology Report 20
Publication Number: Econ Geol 20 Page: 142 Date: 1963
Author: Vokes, F M
Publisher Name: Geological Survey of Canada
Location: https://doi.org/10.4095/103994
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