Calcite from
Mount Tchivira, Quilengues, Huíla Province, Angola

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Predictive Mineralogy

Classification
Locality type:	Mountain
Species:	Calcite
Formula:	CaCO₃
Comments:	Primary calcite interstitial in ijolite. Replaces forsterite in tephritic dykes surrounding the alkali-carbonatite complex.
Confirmation
Validity:	Believed Valid
Data
Mineral Data:	Click here to view Calcite data
Locality Data:	Click here to view Mount Tchivira, Quilengues, Huíla Province, Angola
Data Identifiers
Mindat Occurrence Record ID:	317610
Long-form Identifier:	1:3:317610:8
GUID (UUID V4):	0
Nearest other occurrences of Calcite

11.2km (6.9 miles)	ⓘ Mount Bonga, Quilengues, Huíla Province, Angola
55.1km (34.3 miles)	ⓘ Chicacimo occurrence, Camacuio, Namibe 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. 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., 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) 205-226 doi: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:10.1016/s0899-5362(99)00127-x

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Calcite from Mount Tchivira, Quilengues, Huíla Province, Angola

Calcite from
Mount Tchivira, Quilengues, Huíla Province, Angola