Ontario Geological Survey
Permanent Link to this Record:
MDI31F04NW00023
| Record Name(s) | MacDonald Mine - 1919 |
|---|---|
| Related Record Type | Simple |
| Related Record(s) | |
| Record Status | Developed Prospect Without Reported Reserves or Resources |
| Date Created | 1985-Nov-29 |
| Date Last Modified | 2023-Jun-16 |
| Created By | |
| Revised By |
Primary Commodities: Feldspar (Nonmetals), Niobium, Uranium, Mineral Specimen
Secondary Commodities: Copper, Titanium, Zircon, Thorium, Rare Earth Elements, Molybdenum
Township or Area: Monteagle
Latitude: 45° 9' 56.42" Longitude: -77° 49' 10.7"
UTM Zone: 18 Easting: 278411 Northing: 5005223 UTM Datum: NAD83
Resident Geologist District: Southern Ontario
NTS Grid: 31F04NW
Point Location Description: centroid of hazards
Location Method: AMIS Site Visit
Access Description: East from Cross Country Road on MacDonald Mine Road for 0.9km then north for 200m to parking lot on old dump.
1919-1920: Pennsylvania Feldspar Company - mine opened. 1920-1922: Verona Mining Company Limited - mine in operation. 1922-1928: Genesee Feldspar Company - mine in operation. 1929 -1935: P. MacDonald - some production from dumps and from pits on lot 19. 1954-55: Phillips-Doubt Grubstake Syndicate - prospecting, 42.5 m drifting and cross cutting; DD-7-213 m, 40-ton bulk sampling of ellsworthite-bearing material. 1956: Cloudmont Mines Limited - radiometric and ground geophysical surveys. 2000 - mineral collecting site visited by groups arranged through the Bancroft Chamber of Commerce.2012 - MNDM rehabilitation of site; adits backfilled; removed from Chamber of Commerce guidebook.
Province: Grenville
Subprovince: Central Gneiss Belt
Geological Age: Mesoproterozoic
| Rock Type | Rank | Composition | Texture | Relationship | Pegmatite | 1 | Host |
|---|---|---|---|---|
| Paragneiss | 2 | Contains |
Feb 23, 2012 (A Wilson) - The deposit consists of several zoned, pink pegmatite dikes, dipping to the north, cutting a group of paragneiss units that trend east northeast and dip moderately to the south. There is evidence of a fault trending northwest, 2 km east of the deposit, and possibly one closer (<1 km to the east). The main dike is lens-shaped. At its western end it has a width of 5 feet and rapidly widens to the east and with depth, until a maximum width of about 70 feet is reached towards the centre of the workings. At the eastern end in the lower cut, the dike is not well exposed but does not appear to exceed about 25 feet in width.
| Rank | Mineral Name | Class | Economic Mineral Type | Alteration Mineral Type | Alteration Ranking | Alteration Intensity | Alteration Style |
|---|---|---|---|---|---|---|---|
| 1 | Andradite | Economic | Ore | ||||
| 2 | Allanite | Economic | Ore | ||||
| 3 | Betafite | Economic | Ore | ||||
| 4 | Cyrtolite | Economic | Ore | ||||
| 5 | Ellsworthite | Economic | Ore | ||||
| 6 | Plagioclase | Economic | Ore | ||||
| 7 | Microcline | Economic | Ore | ||||
| 8 | Pyrite | Economic | Ore | ||||
| 9 | Titanite | Economic | Ore | ||||
| 10 | Uraninite | Economic | Ore | ||||
| 11 | Uranothorite | Economic | Ore | ||||
| 12 | Zircon | Economic | Ore | ||||
| 13 | Magnetite | Economic | Gangue |
Feb 23, 2012 (A Wilson) - Cyrtolite occurs in single crystals or masses of crystals that are up to 1 inch in size and are frequently covered with hematite. A typical analysis of pink feldspar from the mine is 64.60% SiO2, 19.3% Al2O3, 0.09% Fe2O3, nil CaO, 12.35% K2O, and 2.67 Na2O. A 40-ton bulk sample collected by the Phillips-Doubt Syndicate graded 3.9% U3O8
Dec 07, 2005 (D Laidlaw) - Large allanite crystal (approx. 30 cm long) in feldspar showing radial fractures. Uranopyrochlore in smoky quartz with radial fractures. (field visit 2000).
| Rank | Classification |
|---|---|
| 1 | Pegmatite |
| Zone | Year | Category | Tonnes | Reference | Comments | Commodities |
|---|---|---|---|---|---|---|
| MacDonald Mine - waste pile 4 | 1956 | Unclassified | 36 | MDC023 | In 1956, William Phillips Associates estimated 40 tons grading 6.0% Nb2O5 | Niobium 6.0 % |
| MacDonald Mine - wastepile 3 | 1956 | Unclassified | 36 | MDC023 | In 1956, William Phillips Associates estimated 40 tons grading 3% U3O8 (2400 lb) | Uranium 3 % |
| MacDonald Mine - wastepile 2 | 1956 | Unclassified | 5443 | MDC023 | In 1956, William Phillips Associates estimated 6000 tons grading 0.2% Nb2O5 (24000 lb) | Niobium 0.2 % |
| MacDonald Mine - wastepile 1 | 1956 | Unclassified | 5443 | MDC023 | In 1956, William Phillips Associates estimated that 6000 tons grading 0.1% U3O8 (12000 lb) | Uranium .1 % |
| Year | Tonnes | Commodities | Reference | Comment |
|---|---|---|---|---|
| 1919 | 31795 | IMR21, p. 17 | total production 1919 to 1938; 35,048 tons |
Publication - Feldspar, Canada Mines Branch Publication 731
Publication Number: CMB Pub 731 Page: 47, 103 Date: 1932
Author: Spence, H. S.
Publisher Name: Canada Mines Branch
Location: https://doi.org/10.4095/307887
Part - Mineral occurrences in the north Hastings area
Publication Number: ARV52-03 Page: 26-27 Date: 1998
Author: Thomson J.E.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Geology of Monteagle and Carlow townships
Publication Number: ARV63-06 Page: 39, 43-47 Date: 1998
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Part - Radioactive mineral occurrences in the Bancroft area
Publication Number: ARV65-06 Page: 138-143 Date: 1998
Author: Satterly J., Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Mono - Pegmatite mineral resources of Ontario
Publication Number: IMR021 Page: 17-18, 20 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
MonoMap - Columbium (niobium) deposits of Ontario
Publication Number: MDC014 Page: 48 Date: 1971
Author: Ferguson S.A.
Publisher Name: Ontario Dept. of Mines and Northern Affairs
Location:
MonoMap - Radioactive mineral deposits of the Pembroke-Renfrew area
Publication Number: MDC023 Page: 105-107, 120-121 Date: 1981
Author: Masson S.L., Gordon J.B.
Publisher Name: Ontario Geological Survey
Location:
MonoMap - Industrial minerals of the Pembroke-Renfrew area, part 2
Publication Number: MDC022 Page: 122-123 Date: 1981
Author: Storey C.C., Vos M.A.
Publisher Name: Ontario Geological Survey
Location:
Mono - Granitic pegmatites of the Bancroft area, southeastern Ontario
Publication Number: OFR5717 Page: 93-94 Date: 1990
Author: Goad B.E.
Publisher Name: Ontario Geological Survey
Location:
Mono - Uranium and thorium deposits of southern Ontario
Publication Number: OFR5311 Page: 237-238 Date: 1981
Author: Gordon J.B., Rybak U.C., Robertson J.A.
Publisher Name: Ontario Geological Survey
Location:
Map - Monteagle and Carlow townships, County of Hastings, Ontario
Publication Number: M1954-03 Scale: 1:31,680 Date: 1997
Author: Hewitt D.F.
Publisher Name: Ontario Dept. of Mines
Location:
Map - Precambrian Geology, Bancroft Area
Publication Number: P3385 Scale: 1:50,000 Date: 1998
Author: Lumbers S.B., Vertolli V.M.
Publisher Name: Ontario Geological Survey
Location:
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