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 Tchegui 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:43 ± 6 Ma
Minimum recorded age:43 ± 6 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
143 ± 6 MaEocene - 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 Tchegui Intrusion, North Region, Cameroon
Data Identifiers
Mindat Occurrence Record ID:1421995
Long-form Identifier:1:3:1421995:1
GUID (UUID V4):0
Nearest other occurrences of Biotite
9.4km (5.8 miles) ⓘHossere Poli Complex, North Region, Cameroon
11.2km (6.9 miles) ⓘKitongo uranium deposit, North Region, Cameroon
31.5km (19.6 miles) ⓘMayo Salah, Gamba, Tcholliré, Mayo-Rey, North Region, Cameroon
35.6km (22.1 miles) ⓘBigbal, Gamba, Tcholliré, Mayo-Rey, North Region, Cameroon
37.7km (23.4 miles) ⓘMayo Salah pluton, Tcholliré, Mayo-Rey, North Region, Cameroon
40.4km (25.1 miles) ⓘDjaba, Gamba, Tcholliré, Mayo-Rey, North Region, Cameroon
48.3km (30.0 miles) ⓘHossere Nyore Granite Intrusion, North Region, Cameroon
51.8km (32.2 miles) ⓘMount Bollo, North Region, Cameroon
79.7km (49.5 miles) ⓘGoroua Group of Plugs, Bénoué, North Region, Cameroon
84.0km (52.2 miles) ⓘKokoumi, Ngong, Bénoué, 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.
Cantagrel, J. M., Jamond, C. & Lasserre, M. (1978). LE MAGMATISME ALCALIN DE LA LIGNE DU CAMEROUN AU TERTIAIRE INFERIEUR: DONNEES GEOCHRONOLOGIQUES K/AR. Bulletin de la Societe Geologique de France Compte Rendu Sommaire des Seances, 20, 300-303.
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.
Cantagrel, J. M., Jamond, C. & Lasserre, M. (1978). LE MAGMATISME ALCALIN DE LA LIGNE DU CAMEROUN AU TERTIAIRE INFERIEUR: DONNEES GEOCHRONOLOGIQUES K/AR. Bulletin de la Societe Geologique de France Compte Rendu Sommaire des Seances, 20, 300-303.
 
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