A tantalum-lithium-cesium mine in the Tanco pegmatite. Owned by The Tantalum Mining Corp. of Canada (TANCO). Discovered 1930, opened 1954-1960. Reopened 1967 and closed 1982. Workings went to at least the 280 foot (90 meter) level.
References:- Černý, P. and Simpson, F.M. (1978): The Tanco pegmatite at Bernic Lake, Manitoba. X. Pollucite.
- Canadian Mineralogist (1978): 16: 325-333.
- Canadian Mineralogist (1980): 18: 185-190.
- Bull. Minéral. (1984): 107: 369-384.
- Mining Annual Review (1985): 97.
- Mineralogical Record: 32: 416.
- Tschernich, R. (1992): Zeolites of the World, p.51, 428.
- Ercit, T.S., Černý, P., Hawthorne, F.C. (1993) Cesstibtantite: a geologic introduction to the inverse pyrochlores. Mineralogy and Petrology: 48: 235-255.
- Canadian Mineralogist (2000): 38: 869-876; 38: 877-891.
- Canadian Mineralogist (2001): 39: 1513.
- Canadian Rockhound: 3(2).
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http://www.davidkjoyceminerals.com/htmfiles/tancomine.htm
American Mineralogist, Volume 94, pages 439–450, 2009
97 entries listed. 76 valid minerals. 6 type localities (valid minerals).
