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Biotite from
Mount Tchivira, Quilengues, Huíla Province, Angola


Locality type:Mountain
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:138 Ma
Minimum recorded age:138 Ma
Sample ages:
Recorded ageGeologic TimeSampleDating method
1138 MaEarly/Lower Cretaceous - K-Ar
Sample references:
1 -
Issa Filho, A. B. R. M. D., Dos Santos, A. B. R. M. D., Riffel, B. F., Lapido-Loureiro, F. E. V., & McReath, I. (1991). Aspects of the geology, petrology and chemistry of some Angolan carbonatites. Journal of Geochemical Exploration, 40(1-3), 205-226. doi.org/10.1016/0375-6742(91)90039-W
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Biotite data
Locality Data:Click here to view Mount Tchivira, Quilengues, Huíla Province, Angola
Data Identifiers
Mindat Occurrence Record ID:317605
Long-form Identifier:1:3:317605:4
GUID (UUID V4):8d76c12b-bb82-499d-a6db-2012f7776034
Nearest other occurrences of Biotite
11.2km (6.9 miles) ⓘMount Bonga, Quilengues, Huíla Province, Angola
55.1km (34.3 miles) ⓘChicacimo occurrence, Camacuio, Namibe Province, Angola
71.9km (44.7 miles) ⓘMacula occurrence, Benguela Province, Angola
72.2km (44.9 miles) ⓘNejoio Complex, Camacuio, Namibe Province, Angola
References
Eur. J. Mineral. , 1993, 5, pp. 1001-1024.
Alves, C.A.M. 1968. Estudo geologico e petrologico do macico alcalino-carbonatitico do Quicuco. Junta de Investigacoes do Ultramar, Lisboa.
Lapido-Loureiro, F.E. 1973. Carbonatitos de Angola. Memorias e Trabalhos do Instituto de Investigacoes Cientifica de Angola, 11.
Alves, C.A.M. 1968. Estudo geologico e petrologico do macico alcalino-carbonatitico do Quicuco. Junta de Investigacoes do Ultramar, Lisboa.
Lapido-Loureiro, F.E. 1973. Carbonatitos de Angola. Memorias e Trabalhos do Instituto de Investigacoes Cientifica de Angola, 11.
Lapido-Loureiro, F. D. V. (1968). Sub-volcanic carbonatite structures of Angola. In Proceedings of the International Geological Congress, Report of the twenty-third session, Prague (Vol. 2, pp. 147-161).
Torquato, J. R. (1977). GEOTECTONIC OUTLINE OF ANGOLA. Cahiers de l'Office de la Recherche Scientifique et Technique Outre-Mer. Paris, Serie Geologie, 9, 15-34.
Allsopp, H. L., & Hargraves, R. B. (1985). Rb-Sr ages and palaeomagnetic data for some Angolan alkaline intrusives. Transactions of the Geological Society of South Africa, 88(2), 295-299.
Issa Filho, A. B. R. M. D., Dos Santos, A. B. R. M. D., Riffel, B. F., Lapido-Loureiro, F. E. V., & McReath, I. (1991). Aspects of the geology, petrology and chemistry of some Angolan carbonatites. Journal of Geochemical Exploration, 40(1-3), 205-226. doi.org/10.1016/0375-6742(91)90039-W
Alberti, A., Castorina, F., Censi, P., Comin-Chiaramonti, P., & Gomes, C. B. (1999). Geochemical characteristics of Cretaceous carbonatites from Angola. Journal of African Earth Sciences, 29(4), 735-759. doi.org/10.1016/S0899-5362(99)00127-X
 
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