Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Feldspar Group from
Tanco Mine, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada


Locality type:Mine
Classification
Species:'Feldspar Group' (not an IMA approved species)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Feldspar Group data
Locality Data:Click here to view Tanco Mine, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
Data Identifiers
Mindat Occurrence Record ID:1017486
Long-form Identifier:1:3:1017486:3
GUID (UUID V4):0
Nearest other occurrences of Feldspar Group
4.0km (2.5 miles) ⓘBuck claim, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.2km (2.6 miles) ⓘPegmatite No. 7, Coe claim, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.3km (2.7 miles) ⓘUnnamed pegmatites, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
4.5km (2.8 miles) ⓘPegmatite No. 2, Buck claim, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.6km (2.8 miles) ⓘPegmatite No. 3, Buck claim, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.7km (2.9 miles) ⓘRush group, Rush Lake, Lac-du-Bonnet area, Manitoba, Canada
4.8km (3.0 miles) ⓘPegmatites 5&6 (Pegli 2), Pegli pegmatite, Bernic Lake, Lac-du-Bonnet area, Manitoba, Canada
4.9km (3.0 miles) ⓘDyke 5 claim, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
5.0km (3.1 miles) ⓘRL3 pegmatite, Rush Lake, Lac-du-Bonnet area, Manitoba, Canada
5.1km (3.2 miles) ⓘDyke 12 claim, Shatford Lake pegmatites, Shatford Lake, Lac-du-Bonnet area, Manitoba, Canada
References
Černý, P., Harris, D. C. (1978) The Tanco pegmatite at Bernic Lake, Manitoba. XI. Native elements, alloys, sulfides and sulfosalts. The Canadian Mineralogist, 16 (4) 625-640
Bannatyne, B.B. (1985) Industrial Minerals in Rare-element Pegmatites of Manitoba. Economic Geology Report ER84-1, Manitoba Energy and Mines Geological Services.
Grice, Joel D. (1989) Bernic Lake, Manitoba: Mining for Space-age Elements. In Famous Mineral Localities of Canada. Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences. p.64-67.
Alexandre, Paul, Salvi, Stefano (2025) Mineral Chemistry of Li-Bearing Minerals at the Giant Tanco Pegmatite, Canada. Minerals, 15 (3). doi:10.3390/min15030221
Breasley, Catriona M., Martins, Tânia, Linnen, Robert L., Deveau, Claude, Groat, Lee A., Koopmans, Lot, Landry, Emilie, Moser, Desmond (2025) The geochemistry, origins and metallurgical implications of different textural types of spodumene-quartz intergrowths (SQUI) from the Tanco pegmatite, Manitoba, Canada. Ore Geology Reviews, 180. 106577 doi:10.1016/j.oregeorev.2025.106577
 
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