 | TorrĂł, L., Villanova, C., Castillo, M., Campeny, M., Gonçalves, A. O., Melgarejo, J. C. (2012) Niobium and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineralogical Magazine, 76 (2) 393-409 doi:10.1180/minmag.2012.076.2.08 | Journal (article/letter/editorial) | | and rare earth minerals from the Virulundo carbonatite, Namibe, Angola L. TORROÌ1, C. VILLANOVA1, M. CASTILLO1...Agostinho Neto, Av. 4 de Fevereiro 7, 815 Luanda, Angola [Received 27 January 2011; Accepted 7 July 2011;...Editor: Hilary Downes] ABSTRACT The Virulundo carbonatite in Angola is one of the largest in the world...WORDS : Angola, carbonatite, pyrochlore, REE, magmatic, hydrothermal, weathering, Virulundo. Introduction...Introduction THE Virulundo carbonatite is one of the largest in the world (Woolley, 2001). Its remote location |  | | 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...one of the least studied carbonatite complexes in Angola. As a few studies have reported, the Monte Verde...structure, such as Tchivira [25,26], Bonga [26â30], Virulundo [31], Bailundo [32], and Catanda [33]. Therefore |  | 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...Sr-, Ba- and Pb-pyrochlores include hematite, strontianite, barite and REE-ïŹuocarbonates and phosphates...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 |  | 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...Verde [69,70]), hypabyssal (Bonga [67,68,70]; Virulundo [71]) and extrusive (Catanda; [67,68,72]). The...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 |  | Giebel, R. Johannes, Gauert, Christoph D.K., Marks, Michael A.W., Costin, Gelu, Markl, Gregor (2017) Multi-stage formation of REE minerals in the Palabora Carbonatite Complex, South Africa. American Mineralogist, 102 (6) 1218-1233 doi:10.2138/am-2017-6004 | Journal (article/letter/editorial) | | carbocernaite cordylite-(Ce) dolomite parisite-(Ce) strontianite synchysite-(Ce) barytocalcite Abbr. Formula...(Figs. 6aâ6c) and is associated with fluorite, strontianite (Fig. 6d), or ancylite (see below). These rods...type is frequently intergrown with magnetite or strontianite and contains inclusions of thorianite and rarely...with REEFC-I). ANC-I is often associated with strontianite and cordylite (see below). A second type (ANC-II)...associated with magnetite, thorite (Figs. 7d and 7e), strontianite, and baryte Fig. 6 GIEBEL ET AL: REE MINERALIZATION |  | | Journal (article/letter/editorial) | | Vuoriyarvi is one of the Devonian Kola Alkaline Province massifs [32]. Its concentrically zonal structure...them unique both massif and for the Kola Alkaline Province in general. Magnesiocarbonatites are widespread...the Vuoriyarvi massif and for the Kola Alkaline Province in general. Magnesiocarbonatites are Petyayan-Vara...Medium-grained dolomitic carbonatites with barite, strontianite, and ancylite-(ĐĄĐ”) (hereinafter called titaniferous...dolomitic carbonatites with consisting barite, strontianite, (3) Breccias of dolomitic carbonatites with |  | | 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,...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...by the Angola Namibia gabbro-anorthosite complex (Issa Filho et al., 1991) (Fig. 1). In Angola, carbonatites |  | Kozlov, Evgeniy, Fomina, Ekaterina, Sidorov, Mikhail, Shilovskikh, Vladimir, Bocharov, Vladimir, Chernyavsky, Alexey, Huber, MiĆosz (2020) The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry. Minerals, 10 (1) 73 doi:10.3390/min10010073 | Journal (article/letter/editorial) | | ancylite and baryte and, to a lesser extent, strontianite, bastnĂ€site, and synchysite. Varieties of carbonatite...quartz-bastnĂ€site matrixes were formed. Simultaneously, strontianite, quartz, calcite, monazite, HREE-rich thorite...bastnĂ€site; metasomatism; Vuoriyarvi; Kola alkaline province 1. Introduction Rare-earth elements (REEs) are...earth carbonatites (RETherefore, carbonatites) in Angola [5,6], Australia for more 50% of the global resources...subjectNamibia of rare earth carbonatites (RE carbonatites) Angola [5,6], Australia [7â9], Brazil Mongolia [52,53] |  | | Journal (article/letter/editorial) | | al. 1998; Castor 2008; Kynicky et al. 2013); strontianite, SrCO 3 , and barytocalcite, CaBa(CO 3) 2 (Konev...compounds forming the witherite-strontianite and aragonite-strontianite series [(Ba, Sr)CO 3 and (Ca,Sr)CO...multistep unmixing to calcite, barytocalcite and strontianite (Fig. 1b). Because the above-described phase...planes or fractures (see the next section); (2) strontianite (SrCO3), which is the most common product of...precipitated interstitially as non-luminescent strontianite and ancylite. f Diffusion-induced zoning in |  | | Report (volume) | | Fluoritebearing carbonatites are reported from Angola, Kenya, Morocco, Mozambique, Namibia, South Africa...Africa, in Namibia (South West Africa), and in Angola and is associated with major fault zones in the...with alkaline intrusive rocks are reported from Angola, Kenya, Malawi, Morocco, Mozambique, Namibia, South...---------------------------- DeKun, 1965. trJ Angola Coola -------------------- 12°31' s. 15°16'E...complex also containing calcite, celestite, strontianite, witherite, barite, apatite, vermiculite, pyrochlore |  | | Journal (article/letter/editorial) | | associated with barite, fluorite, hematite, quartz, strontianite and sulphidesâ. This third process accounts...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineral. Mag. 2012, 76, 393â409...species in plutonic carbonatites: The Tchivira case, Angola. Lithos 2012, 152, 187â201. [CrossRef] Verplanck...Saguenay-Lac-Saint-Jean region of the Grenville province, Canada. Precambrian Res. 1996, 79, 327â346. [CrossRef]...Quebec (central granulite terrain of the Grenville province): A working hypothesis. Can. J. Earth Sci. 1981 |  | Nedosekova, Irina, Vladykin, Nikolay, Udoratina, Oksana, Belyatsky, Boris (2021) Ore and Geochemical Specialization and Substance Sources of the Ural and Timan Carbonatite Complexes (Russia): Insights from Trace Element, RbâSr, and SmâNd Isotope Data. Minerals, 11 (7) 711 doi:10.3390/min11070711 | Journal (article/letter/editorial) | | SiberiaâWhite Winter, Middle Winter (East Sayan province); the NbâREE Chuktukonskoe deposit (Chadobetsky...columbite, fersmite, apatite, ilmenite, zircon, strontianite, and other accessory minerals. The largest Vishnevogorsk...synchysite-(Ce), röntgenite(Ce), ankylite-(Ce), strontianite, barilite, burbankite, chevkinite-(Ce), xenotime-(Y)...sphene, ilmenite, pyrochlore, [56], ankylite, strontianite, carbocernaite, thorite/hattonite, anglesite...(Ce), burbankite) as well as carbocernaite, strontianite, and barite are present as bonates (ankylite-(Ce) |  | Chakhmouradian, Anton R., Reguir, Ekaterina P., Kressall, Ryan D., Crozier, Jeremy, Pisiak, Laura K., Sidhu, Ravinder, Yang, Panseok (2015) Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): Mineralogy, geochemistry and petrogenesis. Ore Geology Reviews, 64. 642-666 doi:10.1016/j.oregeorev.2014.04.020 | Journal (article/letter/editorial) | | calcite, late-stage apatite, barite, celestine, or strontianite. In addition to the aforementioned minerals...also apply to the MianningâDechang carbonatite province in China (Hou et al., 2006; Wang et al., 2001;...Kola Alkaline Province in the context of a Scandinavian North Atlantic Alkaline Province. In: Wall, F...to Mine: the Key Example of the Kola Alkaline Province. Mineral. Soc., London, pp. 1â43. Bush, V.A.,...to Mine: the Key Example of the Kola Alkaline Province. Mineral. Soc., London, pp. 293â340. Chakhmouradian |  | | Book | | the Canary Islands, the North Atlantic Igneous Province and the Sunda Arc with a focus on magmatic crystals...(ac) and Alnö (acl) in Sweden; the Kola alkaline province (acl) in Russia; Sokli (cl) and Iivara (a) in...Nature 195:1075â1076 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 85:48â75 Fischer T, Burnard...Dahlgren S (1998) Tectonic SigniïŹcance of the Fen Province, S. Norway: constraints from geochronology and |  | | Journal (volume) | | February 1987 in Luc Yen (a small city in Yen Bai province, N- Vietnam), this country is an important source...from Burma. On the way from the capital of the province, which is also named Yen Bai, to Luc Yen, a new...and rose quartz from the Borborema Pegmatitic Province (Brazil) irradiated with high gamma doses Barreto...granitic pegmatities located in Borborema Pegmatite Province (BPP, Brazil), it is common to find areas of rose...â about 150,000 km2. The Timan zeolite-bearing province dominated by analcime was discovered in the second |
|
