 | Thompson, R., Smith, P., Gibson, S., Mattey, D., Dickin, A. (2002) Ankerite carbonatite from Swartbooisdrif, Namibia: the first evidence for magmatic ferrocarbonatite. Contributions to Mineralogy and Petrology, 143 (3) 377-396 doi:10.1007/s00410-002-0350-0 | Journal (article/letter/editorial) | | basement at Swartbooisdrif, adjacent to the NW Namibia-Angola border. Their age is uncertain but probably 1...mass-balance considerations. Sodalite from the fenite is REE poor. Geothermometry, using either the calcite-dolomite...ferrocarbonatite lacks a silicate mineral (excluding fenite xenocrysts) and apatite. It has unusually low (basalt-like)...Geological formations are not differentiated in Angola, and the Dwyka sediments are not discussed in this...carbonatites – which extends for 800 km northwards into Angola (Issa Filho et al. 1991; Alberti et al. 1999). |  | | Report (issue) | | carbonatite and associated fenite at 11 localities in the Chilwa Province of Malawi. Remarkably, in that...name Alternative name Continent Country State/Province/Territory Latitude Longitude Carbonatite type...number of occurrences per country. Africa Algeria Angola Burundi Congo (DR) Egypt Gabon Kenya Libya Malawi...Canada, United States, Russia, and China), the province, state, or territory in which the occurrence lies...associated silicate extrusive rocks are cited. Fenite, if present, is usually also listed. Excel™ file |  | Le Bas, M. J., Xueming, Y., Taylor, R. N., Spiro, B., Milton, J. A., Peishan, Z. (2007) New evidence from a calcite-dolomite carbonatite dyke for the magmatic origin of the massive Bayan Obo ore-bearing dolomite marble, Inner Mongolia, China. Mineralogy and Petrology, 90 (3) 223-248 doi:10.1007/s00710-006-0177-x | Journal (article/letter/editorial) | | sodic amphibole needles evidently derived from the fenite (Yang and Le Bas, 2004). Collected one metre and...and ten metres to the north of the contact are fenite samples B242 and B243 (Fig. 2b). They are petrographically...and seen in carbonatites elsewhere e.g. at Bailundo, Angola, Chilwa, Malawi, and Chishanya, Zimbabwe (Woolley...carbonatites across the Zhang dyke, H8 dolomite and fenite Sample locality SiO2 [wt%] TiO2 Al2O3 Fe2O3 MnO...carbonatites rarely exceeding 1 km diameter, but Bongo in Angola is one that exceeds 3 km diameter (Lapido-Loureiro |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., Gonçalves, Antonio O., Neto, Andrés B. (2012) Subsolidus processes as a key factor on the distribution of Nb species in plutonic carbonatites: The Tchivira case, Angola. Lithos, 152. 187-201 doi:10.1016/j.lithos.2012.06.024 | Journal (article/letter/editorial) | | species in plutonic carbonatites: The Tchivira case, Angola Joan C. Melgarejo a, Alessandra Costanzo b,⁎, Aurora...Geologia, Universidade Agostinho Neto, Luanda, Angola a r t i c l e i n f o Article history: Received...Tchivira carbonatite, located 400 km south of Luanda (Angola), is a good example of a carbonatite body produced...Geological setting Most of the carbonatite complexes in Angola are found in the Lucapa structure (deVries Lapido-Loureiro...1200 km set of faults oriented NE–SW that cut the Angola–Congo craton (Issa Filho et al., 1991). Different |  | | Journal (article/letter/editorial) | | Agostinho Neto, Av. 4 de Fevereiro 7, 815 Luanda, Angola Earth and Ocean Sciences, School of Natural Sciences...exsolution in the volcanic carbonatites. K EY WORDS : Angola, carbonatite, zonation in pyrochlore, fluorine,...carbonatites in Africa (Le Bas, 1971) extends into Angola where the majority of carbonatites crop out along...belong to the Paraná Angola Etendeka F IN CARBONATITIC PYROCHLORE Province and occur as ring complexes...by the Angola Namibia gabbro-anorthosite complex (Issa Filho et al., 1991) (Fig. 1). In Angola, carbonatites |  | | Book (edition) | | Finland, Guyana, Venezuela, Brazil, Paraguay, Angola and South-West Africa, i.a. Carbonatites are now...Brogger’s term Sovite Rauhaugite Kasenite Hollaite Fenite Tveitasite Nearly pure calcitic carbonate, max...nomenclature Generalnames Alvikite Beforsite Sovite-fenite or sOvite-tveitasite hybrids. 100-90% Calcite...Silicocarbonatite Rocks Silicates 90-100% Ljolitemelteigite Fenite = Sdvitic or calcitic ijolite ljolite Carbonatitic...wall-rock alterations brand the area as an alkalic province. The types of carbonatite occurrences may be grouped |  | | Book | | . . . . . . . . . . . . . . . 4.13 Rheomorphic Fenite near Ås Jetty . . . . . . . . . . . . . . 4.14...Hartungsvägen) . Farm North of Hartung: Banded Fenite with Migmatite Domains . . . . . . . . . . . ....the Canary Islands, the North Atlantic Igneous Province and the Sunda Arc with a focus on magmatic crystals...Farthest to the east massive syenitic high-grade fenite is found . . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . . . Rheomorphic fenite is exposed near Ås jetty and shows potassium feldspar |
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