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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Biotite from
Hossere Nyore Granite Intrusion, North Region, Cameroon


Locality type:Intrusion
Classification
Species:'Biotite' (not an IMA approved species)
Formula:K(Fe2+/Mg)2(Al/Fe3+/Mg/Ti)([Si/Al/Fe]2Si2O10)(OH/F)2
Age information
Maximum recorded age:550 Ma
Minimum recorded age:550 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
1550 MaEdiacaran - Rb-Sr whole rock
Sample references:
1 -
Lasserre, M. (1978). MISE AU POINT SUR LES GRANITOIDES DITS" ULTIMES" DU CAMEROUN: GISEMENT, PETROGRAPHIE ET GEOCHRONOLOGIE. Bulletin du Bureau de Recherches Geologiques et Minieres, Paris, 4, 143-159.
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Hossere Nyore Granite Intrusion, North Region, Cameroon
Data Identifiers
Mindat Occurrence Record ID:1421973
Long-form Identifier:1:3:1421973:9
GUID (UUID V4):0
Nearest other occurrences of Biotite
40.4km (25.1 miles) ⓘHossere Poli Complex, North Region, Cameroon
42.1km (26.1 miles) ⓘKitongo uranium deposit, North Region, Cameroon
48.3km (30.0 miles) ⓘHossere Tchegui Intrusion, North Region, Cameroon
52.7km (32.7 miles) ⓘKokoumi, Ngong, Bénoué, North Region, Cameroon
53.0km (33.0 miles) ⓘMount Bollo, North Region, Cameroon
59.4km (36.9 miles) ⓘGoroua Group of Plugs, Bénoué, North Region, Cameroon
72.9km (45.3 miles) ⓘMayo Salah, Gamba, Tcholliré, Mayo-Rey, North Region, Cameroon
78.6km (48.9 miles) ⓘMayo Salah pluton, Tcholliré, Mayo-Rey, North Region, Cameroon
78.9km (49.0 miles) ⓘBigbal, Gamba, Tcholliré, Mayo-Rey, North Region, Cameroon
88.3km (54.9 miles) ⓘDjaba, Gamba, Tcholliré, Mayo-Rey, North Region, Cameroon
References
Lasserre, M. (1978). MISE AU POINT SUR LES GRANITOIDES DITS" ULTIMES" DU CAMEROUN: GISEMENT, PETROGRAPHIE ET GEOCHRONOLOGIE. Bulletin du Bureau de Recherches Geologiques et Minieres, Paris, 4, 143-159.
 
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