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Bicroft Mine (Centre Lake Mine), Cardiff Township, Haliburton Co., Ontario, Canada

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Latitude & Longitude (WGS84): 44° 59' 49'' North , 78° 2' 5'' West
Latitude & Longitude (decimal): 44.99722,-78.03500
GeoHash:G#: drbxbr2xu
Other regions containing this locality:Bancroft area (Bancroft district), Ontario, Canada
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate

Owned by Macassa Gold Mines, Ltd., Bicroft Div.

In pegmatite dykes cutting biotite gneiss and amphibolite.

"This mine was the second larges producer of uranium in the Bancroft area.

"The deposit was discovered in 1952 by G.W. Burns of Peterborough. Centre Lake Uranium Mines Limited began exploration of the deposit in 1953. By 1955 when the company was amalgated with Croft Uranium Mines Limited to form Bicroft Uranium Mines Limited, exploration work consisted of surface cuts, a 53.4-m adit and a 71.4-m shaft. The newly formed company erected a mill, sank another shaft to a depth of 562 m and brought the mine into production in 1956. From then until operations were terminated in 1963, 2,016,693 kg of U3O8 were recovered from 2,233,055 t of ore."

Mineral List

40 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Neoproterozoic - Mesoproterozoic
541 - 1600 Ma

ID: 613659
Grenville Supergroup and Flinton Group

Age: Proterozoic (541 - 1600 Ma)

Stratigraphic Name: Flinton Group

Comments: Grenville Province Central Metasedimentary Belt

Lithology: Flows, tuffs, breccias, minor iron formation, minor metasedimentary rocks; includes reworked pyroclastic units, amphibolite

Reference: Ontario Geological Survey. 1:250 000 scale bedrock geology of Ontario. ISBN 978-1-4435-5705-4. Miscellaneous Release–Data 126 - Revision 1. [1]

1200 - 1400 Ma

ID: 3185742
Mesoproterozoic sedimentary rocks

Age: Ectasian (1200 - 1400 Ma)

Lithology: Marble

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.


Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Satterly, J. (1956) Radioactive Mineral Occurrences in the Bancroft Area, Ontario Department of Mines, Annual Report ARV65, Pt.6, p.30-36.
Pouliot, g., Maxwell, J.A. and Robinson, S.C (1964): Cenosite from Bancroft, Ontario. Canadian Mineralogist 8, 1-10.
Evans, A. M. (1966): The Development of Lit-Par-Lit Gneiss at the Bicroft Uranium Mine, Ontario. Canadian Mineralogist, 8, 593-609.
Griffith,J. W. (1967) The Uranium Industry - It’s History, Technology and Prospects, Mineral Report 12, Mineral Resource Division, Department of Energy, Mines and Resources, Ottawa, Canada p. 196-217.
Sabina, A.P. (1986): Rocks and Minerals for the Collector, Bancroft-Parry Sound Area and Southern Ontario. GSC Misc. Report 39.

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