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Silver Crater Mine (Basin Property), Faraday Township, Hastings Co., Ontario, Canada

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Latitude & Longitude (WGS84): 45° 1' 45'' North , 78° 0' 38'' West
Latitude & Longitude (decimal): 45.02917,-78.01083
GeoHash:G#: f2080v61z
Other regions containing this locality:Bancroft area (Bancroft district), Ontario, Canada
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate

Probably a carbonatite intrusion into biotite-amphibolites and syenitized gneisses. Famous for its betafite crystals.
"Silver Crater Mines, Limited, was incorporated in February 1951, with an
authorized capitalization of 3,000,000 shares of ftl par value, of which 2,543,215 have been issued. The head office is at 696 Yonge Street, Toronto. The mine address is Cobalt.
The company owns the Silver Banner and Ophir properties and has a lease
on the Mensilvo property, all in Coleman township, district of Timiskaming.
It also holds claims in Faraday Township, Hastings County.
The Basin property of Silver Crater Mines, Limited, comprises lot 31, concession XV, Faraday Township, Hastings County. The property was acquired in 1953. It is about 8 miles west of Bancroft and is accessible from the Monck road by a truck road 2 miles long. Silver Crater Mines, Limited, is a wholly-owned subsidiary of International Cobalt and Silver Mining Company, Limited.
In 1953-55 the company carried out exploration on a carbonate body containing crystals of betafite, a multiple oxide of niobium, titanium, and uranium.
Although the occurrence is very similar to pyrochlore-bearing carbonate bodies of igneous origin, the Silver Crater body is believed to be hydrothermal.
In 1925 the north end of the carbonate body was worked for black mica by
S. Orser and D. J. Wilson, and from 1947 to 1949 the property was operated by Bancroft Mica and Stone Products Mining Syndicate, Limited, producing scrap and trimmed mica. This production all came from an open-pit, which, in 1949, was 30 feet in diameter with a 65-foot wall against the slope of the hill, and a 12-foot wall on the outer side.
Silver Crater Mines, Limited, commenced operations in 1953 and explored the radioactive part of the carbonate body to the south of the old mica pit by a number of trenches and six shallow, X-ray drill-holes. The work was continued in 1954 by bulldozing overburden and weathered rock from the top of the carbonate body and by diamond-drilling. By the end of 1954, 14 inclined holes and 9 vertical holes, totalling 4,274 feet, had been drilled.
Drilling was continued in 1955, 11 vertical holes being completed for a total footage of 1,339 feet. The carbonate body was also explored by an adit, the underground development amounting to 435 feet of drifting and crosscutting and 94 feet of raising. The property was inactive in the latter half of 1955.
The property lies in a zone, about 3/4 mile wide, between a large area of
granite and hybrid granite gneiss to the north and an area of marble and associated metasediments to the south. This zone consists mainly of syenite, and syenite gneiss, to a lesser extent nepheline gneiss, and contains small areas of hornblende-plagioclase gneiss." (ARV65)

Mineral List

14 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: 617254
Grenville Supergroup and Flinton Group

Age: Proterozoic (541 - 1600 Ma)

Stratigraphic Name: Flinton Group

Comments: Grenville Province Central Metasedimentary Belt

Lithology: Marble, calc-silicate rocks, skarn, tectonic breccias

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]

1400 - 1600 Ma

ID: 3184637
Mesoproterozoic crystalline metamorphic rocks

Age: Calymmian (1400 - 1600 Ma)

Lithology: Crystalline metamorphic rocks

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.123-132.
Hewitt, D.F. (1967) Uranium and Thorium Deposits of Southern Ontario, Ontario Department of Mines, Mineral Deposit Circular 4, p.35.
Gordon, J.B., Rybak, U.C., and Robertson, J. A. (1981) Uranium and Thorium Deposits of Southern Ontario, Ontario Geological Survey, Open File Report 5311, p.227-228.
Steacy, H.R., Rose, E. R., Moyd, L. & Hogarth, D.D. (1982) Some classic Mineral Localities of Southeastern Ontario. Mineralogical Record 13, 197-203.

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