 | | Journal (article/letter/editorial) | | petrography of the Portuguese West African colony of Angola, and of its three provinces that of Benguella is...descriptions of rocks from Angola, and especially of its northern province, Loanda, have been given by...shonkinite respectively. * BERG, G., "Gesteine von Angola, Sao Thome, und St Helena," Tscher, min. u. petr...Contribution to the Petrology of North-western Angola," Oeol. Mag., dec. vi, vol. ii, pp. 228-232 ; 267-272... P. DE, and MATTOS, A. A. DE, A Golonisagao de Angola, Lisbon, 163 pp., 1912. TRANS. ROY. SOC. EDIK, |  | | Journal (article/letter/editorial) | | Monte Verde CarbonatiteâAlkalineâAgpaitic Complex (Angola) Sandra Amores-Casals 1,2, *, Antonio Olimpio Gonçalves...Universidade Agostinho Neto, Luanda, Caixa Postal 815, Angola; tonygoncalves72@hotmail.com Institut de CiĂšncies...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 [26â30], Virulundo [31], Bailundo [32], and Catanda [33]. Therefore, an accurate |  | Amores-Casals, , Melgarejo, , Bambi, , Gonçalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in CarbonatitesâThe Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | Concentration in CarbonatitesâThe 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 |  | Campeny, Marc, Kamenetsky, Vadim S., Melgarejo, Joan C., Mangas, JosĂ©, Manuel, JosĂ©, Alfonso, Pura, Kamenetsky, Maya B., Bambi, Aurora C.J.M., Gonçalves, Antonio O. (2015) Carbonatitic lavas in Catanda (Kwanza Sul, Angola): Mineralogical and geochemical constraints on the parental melt. Lithos, 232. 1-11 doi:10.1016/j.lithos.2015.06.016 | Journal (article/letter/editorial) | | Carbonatitic lavas in Catanda (Kwanza Sul, Angola): Mineralogical and geochemical constraints on...O., Carbonatitic lavas in Catanda (Kwanza Sul, Angola): Mineralogical and geochemical constraints on...MANUSCRIPT Carbonatitic lavas in Catanda (Kwanza Sul, Angola): mineralogical and geochemical constraints on...Geologia, Universidade Agostinho Neto, Luanda, Angola. Pura Alfonso, Dept. Enginyeria Minera i Recursos...Luanda, Angola. Antonio O. Gonçalves, Depto. Geologia, Universidade Agostinho Neto, Luanda, Angola. Abstract |  | | 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, ïŹuorine,...(Mariano, 1989a; Woolley and Kempe, 1989). Apatite magnetite mineralization is associated with the early stages...carbonatites in Africa (Le Bas, 1971) extends into Angola where the majority of carbonatites crop out along...belong to the ParanaÌ Angola Etendeka F IN CARBONATITIC PYROCHLORE Province and occur as ring complexes |  | | Journal (article/letter/editorial) | | 26 Sdvite a magnetite Kasenite a pyroxene et nepheline Sijvite B biotite et magnetite Siivite a biotite...biotite et magnetite Rauhaugite a apatite et feldspath Rauhaugite a apatite et feldspath Carbonatite 8....apatite et phlogopite Carbonatite 8. apatite et magnetite Carbonatite a apatite et phlogopite Rodbergite...Norvege Fen Cap Vert Ile de Fogo Maroc Tamazert Angola #sO/SMOW 7,15 6=C/PDB -6,6 8,OO f 0,2 7,75 f...brune Carbonatite a magnetite Sovite a pyroxene et apatite Sovite brechique a magnetite et apatite Sovite |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., Gonçalves, Antonio O., Neto, AndrĂ©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,â, 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...also present and consists of a coarse-grained magnetite, partly replaced by hematite. The outcrop conditions...Geological setting Most of the carbonatite complexes in Angola are found in the Lucapa structure (deVries Lapido-Loureiro |  | 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...those of silicate layered intrusions; ankerite, magnetite and occasionally calcite are cumulus phases, joined...abundant, tiny exsolved strontianite grains. Magnetite is close to pure Fe3O4. Pyrochlore has ïŹnescale...and light-REEenriched rims. ICP-MS analysis of magnetite and pyrochlore from the carbonatite allows calculation...oxygen isotope fractionation between calcite and magnetite, gives temperatures in the range 420â460 C. Initial |  | 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) | | oxygen isotope composition of the dolomite and magnetite in the dykes is lower than that in the fine-grained...other geochemical characteristics. The carbonate-magnetite thermometric pairs of the fine-grained dolomite...(c) that it contains clusters of apatite and magnetite crystals that are often elongate and parallel...presence of abundant clusters of apatite and magnetite is atypical of sedimentary carbonate rocks although...do rare red-brown Fe-oxide pseudomorphs after magnetite octahedra. In most respects, the calcitic portion |  | | Journal (article/letter/editorial) | | Tundulu 1 0, 07 Chilwa 2 X 2 [Longonjo 4.5 Bailundo 5 Arax& 4 RESERVES Core, miles Lueshe 1...gold. Low-temperature solutions deposit thorire. Magnetite may be replaced by hematite. .41teration.--Iron...6. transport of soils and pyrochlore,zircon, magnetite, limonite and titanate concentrates into dolinasand...Cassiterite Uranium Minerals TungstenMinerals Magnetite Ilmenite Phosphates Zircon Rutile Garnet ...the U.S.S.R., with hematite,ilmenorutile, and magnetite. In the Kalba-Narym basin,Kazakhstan,euxeniteand |  | | Report (issue) | | associated fenite at 11 localities in the Chilwa Province of Malawi. Remarkably, in that paper it was also...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...including bastnĂ€site, monazite, apatite, pyrochlore, magnetite, fluorite, vermiculite, calcite, chalcopyrite |  | 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) | | Craton, in the southeastern part of the Rio Negro Province (Santos et al. 2000). The basement is represented...typical rock-forming constituents include apatite, magnetite, and ferromagnesian silicates (Mitchell, 2005;...pyrochlore, contain abundant ferrocolumbite and magnetite together with minor niobian rutile. Another point...goethite, as described in the Longonjo carbonatite, Angola (Castellano et al. 2012). Thus, we consider that...others). Hematite is mainly formed by oxidation of magnetite (Anand and Gilkes 1984; Anand and Payne, 2002) |  | | 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 |  | | Book (edition) | | Finland, Guyana, Venezuela, Brazil, Paraguay, Angola and South-West Africa, i.a. Carbonatites are now...(Jacupiranga, Brazil). In addition deposits of fluorite, magnetite, vanadium, and vermiculite occur associated with...wall-rock alterations brand the area as an alkalic province. The types of carbonatite occurrences may be grouped...belovite), perovskite Sphene, ilmenite, rutile, Ti-magnetite, zircon, apatite, pyrochlore Volatile elements:...Larsen (1940) has pointed out, a petrographic province must be defined not only with respect to space |  | | Book | | the Canary Islands, the North Atlantic Igneous Province and the Sunda Arc with a focus on magmatic crystals...the northern end, fenites (b, c) are cut by a magnetite dyke (d). Wollastonite-rich rocks (eâh) follow...previously exploited for iron due to a high content in magnetite. It is said that Harry von Eckermann was . ....ïŹeldwork visits. c, d Pyroxenite types at SlĂ€da. eâh Magnetite at SlĂ€da . . . . Ă
sâforest road; nepheline syenite...(ac) and Alnö (acl) in Sweden; the Kola alkaline province (acl) in Russia; Sokli (cl) and Iivara (a) in |  | | 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 âAfarâ flood basalt province (compiled from Schandelmeier and Reynolds, 1997;...compositionally related to the mainly alkaline province of intraplate magmatism in north Sudan and south...Weathering is restricted to hydro-oxidation around magnetite-ilmenite grains and to thin films that do not |  | | Report (volume) | | geology âThe Making of the Earthâ Visit to Benguella, Angola The classification of coast types, the nature and...Earthquake studies. 1912. Expedition to Benquella, Angola. 1913. Publication of âThe nature and origin of...Territory and the east of Portuguese-controlled Angola to German Southwest Africa. He concluded that âEnglandâ...present and they all fell into the Indo-Pacific province. The first proofs came in July 1899, the final...declined any financial dealings as outside his province. It seemed a deadlock. There were several Melbourne |  | | 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)...greenschist-facies metamorphism. It alters to magnetite within the amphibolite and granulite facies (Thompson...of weathering profile silcretes, southern Cape Province, South Africa. In: Wilson RCL (ed) Residual deposits...Ga) forms the southern boundary of the Superior province of the Canadian Shield. Uranium-bearing conglomerate |  | | 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 â 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 |
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