Biotite from
Okenyenya Complex, Dâures Constituency, Erongo Region, Namibia

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Predictive Mineralogy

Classification
Locality type:	Complex
Species:	'Biotite' (not an IMA approved species)
Formula:	K(Fe²⁺/Mg)₂(Al/Fe³⁺/Mg/Ti)([Si/Al/Fe]₂Si₂O₁₀)(OH/F)₂
Confirmation
Validity:	Believed Valid
Data
Mineral Data:	Click here to view Biotite data
Locality Data:	Click here to view Okenyenya Complex, Dâures Constituency, Erongo Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:	1431845
Long-form Identifier:	1:3:1431845:6
GUID (UUID V4):	0
Nearest other occurrences of Biotite

84.4km (52.5 miles)	ⓘ Kalkfeld Complex, Kalkfeld, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
88.3km (54.9 miles)	ⓘ Lofdal-Bergville REE deposit, Khorixas, Kunene Region, Namibia
94.3km (58.6 miles)	ⓘ Amis Complex, Brandberg Complex, Brandberg Area, Dâures Constituency, Erongo Region, Namibia
97.7km (60.7 miles)	ⓘ Kameelburg Complex, Kalkfeld, Otjiwarongo Constituency, Otjozondjupa Region, Namibia
References
Simpson, E.S.W. 1954. The Okenjeje igneous complex, South-West Africa. Transactions of the Geological Society of South Africa, 57, 125-173. *Watkins, R. T.; Le Roex, A. P. (1991) Petrology and structure of syenite intrusions of the Okenyenya igneous complex. Communications of the Geological Survey of Namibia, 7. 55-70* Milner, S. C., Le Roex, A. P., & Watkins, R. T. (1993). Rb-Sr age determinations of rocks from the Okenyenya igneous complex, northwestern Namibia. Geological Magazine, 130(3), 335-343. doi.org/10.1017/S001675680002001X Watkins, R. T.; Le Roex, A. P. (1994) A reinvestigation of the Okenyenya igneous complex: a new geological map, structural interpretation and model of emplacement. Communications of the Geological Survey of Namibia, 9. 13-21 Watkins, R. T., McDougall, I., & Le Roex, A. P. (1994). K-Ar ages of the Brandberg and Okenyenya igneous complexes, north-western Namibia. Geologische Rundschau, 83(2), 348-356. doi.org/10.1007/BF00210550 Le Roex, A. P., Lanyon, R. (1998) Isotope and Trace Element Geochemistry of Cretaceous Damaraland Lamprophyres and Carbonatites, Northwestern Namibia: Evidence for Plume--Lithosphere Interactions. Journal of Petrology, 39 (6) 1117-1146 doi:10.1093/petroj/39.6.1117

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Biotite from Okenyenya Complex, Dâures Constituency, Erongo Region, Namibia

Biotite from
Okenyenya Complex, Dâures Constituency, Erongo Region, Namibia