 | | Journal (article/letter/editorial) | | Monte Verde CarbonatiteāAlkalineāAgpaitic Complex (Angola) Sandra Amores-Casals 1,2, *, Antonio Olimpio GonƧalves...Universidade Agostinho Neto, Luanda, Caixa Postal 815, Angola; tonygoncalves72@hotmail.com Institut de CiĆØncies...agpaitic minerals; eudialyte; rinkite; loparite; Angola 1. Introduction Undersaturated alkaline rocks...between Huambo and Kwanza Sul provinces, is one of the least studied carbonatite complexes in Angola. As...Tchivira [25,26], Bonga [26ā30], Virulundo [31], Bailundo [32], and Catanda [33]. Therefore, an accurate |  | Amores-Casals, , Melgarejo, , Bambi, , GonƧalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in CarbonatitesāThe Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | Concentration in CarbonatitesāThe Bonga Complex (Angola) Sandra Amores-Casals 1,2, *, Joan-Carles Melgarejo...Universidade Agostinho Neto, Luanda, Caixa Postal 815, Angola; aurorabambi@hotmail.com (A.B.); tonygoncalves72@hotmail...is one of the largest carbonatitic outcrops in Angola and worldwide [75], with well-known resources in...carbonatite, located SE of Quilengues, Huila Province, Angola (Figure 1), is a carbonatite-alkaline complex...graben, a megastructure cutting Congo, Kasai and Angola Cratons and reactivated during the opening of the |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., GonƧalves, Antonio O., Neto, AndrĆ©s 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,ā, Aurora...Geologia, Universidade Agostinho Neto, Luanda, Angola a r t i c l e i n f o Article history: Received...associated with Sr-, Ba- and Pb-pyrochlores include hematite, strontianite, barite and REE-ļ¬uocarbonates and...Tchivira carbonatite, located 400 km south of Luanda (Angola), is a good example of a carbonatite body produced...a coarse-grained magnetite, partly replaced by hematite. The outcrop conditions do not allow establishing |  | 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...Geological formations are not diļ¬erentiated in Angola, and the Dwyka sediments are not discussed in this...carbonatites ā which extends for 800 km northwards into Angola (Issa Filho et al. 1991; Alberti et al. 1999)....outermost zones. Sample Ankerite Stron- Magnetite Hematite tianite PB27 29 27 27 27 27 27 29 27 27 29 27...partially replaced by small irregular areas of hematite. This is pure Fe2O3 (Table 1), except for trace |  | | Journal (article/letter/editorial) | | Tundulu 1 0, 07 Chilwa 2 X 2 [Longonjo 4.5 Bailundo 5 Arax& 4 RESERVES Core, miles Lueshe 1...deposit thorire. Magnetite may be replaced by hematite. .41teration.--Iron oxidesand silicatesalter...Turkey, with arsenopyrite;in the U.S.S.R., with hematite,ilmenorutile, and magnetite. In the Kalba-Narym...Depositsin Kazakhstan, in the Pacific Maritime Province and in Manjuria are related to granitic rocks..., 1957, On the central-African metallogenetie province: Geol. Rdsh. 46. 6. de Kun, N., 1959, Les gisements |  | Giovannini, Arthur L., Bastos Neto, Artur C., Porto, Claudio G., Pereira, Vitor P., Takehara, Lucy, Barbanson, Luc, Bastos, Pedro H.S. (2017) Mineralogy and geochemistry of laterites from the Morro dos Seis Lagos Nb (Ti, REE) deposit (Amazonas, Brazil) Ore Geology Reviews, 88. 461-480 doi:10.1016/j.oregeorev.2017.05.008 | Journal (article/letter/editorial) | | (predominant in the lower and upper varieties) and hematite (predominant in the intermediate types, formed...Craton, in the southeastern part of the Rio Negro Province (Santos et al. 2000). The basement is represented...of 700 Āµm. Some crystals are broken and present hematite at the edges and in fractures (Fig. 4A). Barite...siderite crystals are partially dissolved, the hematite is much more abundant (Fig. 4D) and the texture...abundant. The crystals present hematite at the edges or along fractures. The hematite zone at the edge of siderite |  | | Book (edition) | | Finland, Guyana, Venezuela, Brazil, Paraguay, Angola and South-West Africa, i.a. Carbonatites are now...wall-rock alterations brand the area as an alkalic province. The types of carbonatite occurrences may be grouped...Larsen (1940) has pointed out, a petrographic province must be defined not only with respect to space...assignment of some occurrences to a particular province rests on geographic, geologic, or petrologic affinities...\e ā: ! | Figure 2-1] The Arkansas alkalic province (Erickson and Blade, 1963). rather than on temporal |  | | Report (issue) | | Atomic Energy Agency: AFGHANISTAN ALBANIA ALGERIA ANGOLA ANTIGUA AND BARBUDA ARGENTINA ARMENIA AUSTRALIA....................................... 49 6.5.1. Angola..................................................Details on the geology and formation of the alkaline province in northern Karelia (Kola Peninsula) are described...investigated area is located near Sivrihisar, province of Eskisehir, ~150 km W of Ankara. The deposit...pegmatites in the Mont Laurier area of the Grenville Province may be classified as results of high grade metamorphic |  | | Report (issue) | | Bailey and S. Kearns 12. Post-Paleozoic magmatism in Angola and Namibia: A review . . . . . . . . . . . . ...provinces of the Saharan zone, Cameroon volcanic line, Angola and Namibia, and the East African Rift system....and the Ethiopian-Yemenite āAfarā flood basalt province (compiled from Schandelmeier and Reynolds, 1997;...compositionally related to the mainly alkaline province of intraplate magmatism in north Sudan and south...pyroxenite has ~16ā21 mol% geikielite and ~9ā21 mol% hematite and ~16ā26 mol% and ~3ā8 mol% in garnet websterite |  | | Book | | the Canary Islands, the North Atlantic Igneous Province and the Sunda Arc with a focus on magmatic crystals...(ac) and Alnƶ (acl) in Sweden; the Kola alkaline province (acl) in Russia; Sokli (cl) and Iivara (a) in...Nature 195:1075ā1076 Doig R (1970) An alkaline rock province linking Europe and North America. Can J Earth...and carbonatitic magmatism in the Kola Alkaline Province: a review. Lithos 85:48ā75 Fischer T, Burnard...Dahlgren S (1998) Tectonic Signiļ¬cance of the Fen Province, S. Norway: constraints from geochronology and |  | | Book | | Sinian Reservoirs of the Weiyuan Area, Sichuan Province: The Oldest Gas in China y. Xu, P. Shen, Y. Li...isotopically fractionated sulphides in Superior Province, Canada. Chern GeoI65:341-358 Campbell SE (1979)...in some Oxisols and paleosols (McFarlane 1976). Hematite in these soils and paleosols is remarkably stable...These sediments also contain paleo placers rich in hematite and other heavy minerals. Only sparse analytical... 6), which is rich in hematite that appears to be clastic. Excluding hematite, both units consist of |  | | Book (volume) | | 2893 laka language USE Yaka language (Congo and Angola) lAkovlev (Fighter plane) USE Yak (Fighter plane)...River (Netherlands) Ijsel Rivers River (Utrecht Province-South Holland, Netherlands) USE Hollandsche IJssel...language Ikumama Campo Piazza del ā Quebec (Province) USE Bizard Island (Quebec) He Bonaventure (Quebec)...people) (May Subd Geog) UF Awa (Southern Highlands Province New Guinea people) Ibo Ugu (Papua New Guinea people)...language L'F Awa language (Southern Highlands Province. Papua New Guinea) Ibo Ugu language Imbon Ggo |  | | Book (volume) | | of a geographic feature, the name of a state or province, or the name of a city, then the name of the country...(Ont. and Quebec) BT Lakes Ontario Lakes Quebec (Province) Abitibi Greenstone Belt (Ont. and Quebec) BT...Greenstone belts Ontario Greenstone belts Quebec (Province) ā ā ā ā USE Abkhaz Abkhazians philology ...Abraham, Plains of (Quebec) BT Plateaus Qu6bec (Province) Abraham, Plains of (Quebec), Battle BT Quebec...works dealing collectively with the countries of Angola, Cape Verde, Guinea-Bissau, ā Politics and government |  | | Journal (volume) | | found in the caverns of Mount Chauvaux in the province of Namur, Belgium. | 1 Pascalis, an Exposition...the basin of the Cunene and the districts about Angola and Benguela. 6. Finally, in the east, the region...distance west of BihĆ©, near that of the Cunene at Bailundo. The streams flowing to the west directly to the...hand, the potters wheel being unknown. In the province of Para, among the Indians, and to a considerable...The common ware of the civilized Indians of the province of Para is usually very plain and rarely ever |
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