Biotite from
Mrima Hill Mine, Kwale County, Kenya

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Predictive Mineralogy

Classification
Locality type:	Mine
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 Mrima Hill Mine, Kwale County, Kenya
Data Identifiers
Mindat Occurrence Record ID:	715003
Long-form Identifier:	1:3:715003:6
GUID (UUID V4):	0
Nearest other occurrences of Biotite

7.1km (4.4 miles)	ⓘ Jombo Hill, Kwale County, Kenya
77.4km (48.1 miles)	ⓘ Lasamba Hill, Kwale County, Kenya
References
Caswell, P. V., & Baker, B. H. (1953). Geology of the Mombasa-Kwale Area Report No. 24. Nairobi, Geological Survey of Kenya. Coetzee, G.L., Edwards, C.B. (1959) The Mrima Hill Carbonatite, Coast Province, Kenya. South African Journal of Geology, 62:1, 373-397. Rock, N. M. S. (1976) The comparative strontium isotopic composition of alkaline rocks: New data from Southern Portugal and East Africa. Contributions to Mineralogy and Petrology, 56 (2) 205-228 doi:10.1007/bf00399605 Dindi, E. W., & Swain, C. J. (1988). Joint three-dimensional inversion of gravity and magnetic data from Jombo Hill alkaline complex, Kenya. Journal of the Geological Society, 145(3), 493-504. doi.org/10.1144/gsjgs.145.3.0493 *Woolley, A. R. (2001) Alkaline Rocks and Carbonatites of the World, Part 3: Africa* - Alkaline Rocks and Carbonatites of the World. The Geological Society of London.*p.138 Berger, Vladimir I.; Singer, Donald A.; Orris, Greta J. (2009) Carbonatites of the World, Explored Deposits of Nb and REE—Database and Grade and Tonnage Models . Open-File Report* 2009-1139. US Geological Survey doi:10.3133/ofr20091139 *Harmer, R.E., Nex, P.A.M. (2016) Rare Earth Deposits of Africa. Episodes, 39 (2) 381-406 doi:10.18814/epiiugs/2016/v39i2/95784*

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Biotite from Mrima Hill Mine, Kwale County, Kenya

Biotite from
Mrima Hill Mine, Kwale County, Kenya