Ontario Geological Survey
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MDI31D16NW00201
| Record Name(s) | Jesko Uranium Mines Ltd. Occurrence - 1954 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Occurrence |
| Date Created | 1981-Sep-21 |
| Date Last Modified | 2022-Sep-27 |
| Created By | |
| Revised By |
Primary Commodities: Uranium
Township or Area: Monmouth, Monmouth
Latitude: 44° 54' 27.58" Longitude: -78° 16' 8.66"
UTM Zone: 17 Easting: 715584.65 Northing: 4976321.43 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31D16NW
Point Location Description: General
Location Method: Data Compilation
Access Description: Northeast of Hadlington Lake.
1954: Jesko Uranium Mines, Limited. - surface trenching, DD-13-1,998 feet: 1969: Millmount Exploration Limited - Ground spectrometer survey.
| Office File Number | Online Assessment File Identifier | Online Assessment File Directory |
|---|---|---|
| Monmouth #28 / 13 | 31D16NW0031 | 31D16NW0031 |
Province: Grenville
Subprovince: Central Metasedimentary Belt
Terrane: Elzevir
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Paragneiss | 1 | Granitic | Adjacent |
|---|---|---|---|---|
| Terrigenous-Clastic-Unsubdivided | 2 | Footwall | ||
| Pegmatite | 3 | Leucogranite | Contains |
Jan 27, 2017 (A Wilson) - The metasedimentary unit is underlain by parsgneiss, amphibolite and marble. The metasediments strike northeast and dip 60-70º Se and are intruded by a mass of metagabbro and by a band of syenite containing patches of nepheline gneiss. Three radioactive showings occur in leucogranite pegmatite. The pegmatite bodies are up to 90 ft. wide and 450 ft. long. Showing No. 1 is on the north side of Hadlington Lake A leucogranite pegmatite forms a lenticular body at the south point of a swamp at the mouth of the northeast bay of the lake. This body has been explored by 3 trenches. Geiger counter readings in a shallow trench averaged 10x.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Uranothorite | Economic | Ore | ||||
| 2 | Allanite | Economic | Ore | ||||
| 3 | Uraninite | Economic | Ore | ||||
| 4 | Zircon | Economic | Ore |
Jan 27, 2017 (A Wilson) - Grab samples from showings 1, 2, and 3 averaged respectively 0.108, 0.09 and 0.098% U3O8. Four samples from the south part of the No. 1 showing averaged 0.108% U3O8. Geiger counter readings for No. 2 showing ranged from 4x to 6x. Four grab samples from this showing averaged 0.09% U3O8. Showing No. 3 is a dike or sill of leucogranite pegmatite striking about N 30º E which has been explored by 3 trenches and a number of shallow pits over a length of about 450 feet. Geiger readings on the granite pegmatite were 5x-12x with rarely, a few spot-high readings of 18x where magnetite is abundant. Eleven grab samples of freshly-blasted pegmatite taken at 5-50 foot intervals over a length of 200 ft. in the north part of the showing averaged 0.198% U3O8.
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: OFR5311 Page: 142 Date: 1981
Author: Gordon J.B., Rybak U.C., Robertson J.A.
Publisher Name: Ontario Geological Survey
Location:
Part - Radioactive mineral occurrences in the Bancroft area
Publication Number: ARV65-06 Page: 89-91 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: 29-30 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: 159-162 Date: 1997
Author: Armstrong H.S., Gittins J.
Publisher Name: Ontario Dept. of Mines
Location:
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:
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