 | Torró, 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. TORRÓ1, 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 |  | 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 Carbonatites—The Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | Concentration in Carbonatites—The 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 |  | Campeny, Marc, Kamenetsky, Vadim S., Melgarejo, Joan C., Mangas, José, Manuel, José, 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) | | Monte Verde Carbonatite–Alkaline–Agpaitic Complex (Angola) Sandra Amores-Casals 1,2, *, Antonio Olimpio Gonçalves...Universidade Agostinho Neto, Luanda, Caixa Postal 815, Angola; tonygoncalves72@hotmail.com Institut de Ciències...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 [26–30], Virulundo [31], Bailundo [32], and Catanda [33]. Therefore |  | 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 |  | 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) | | calcite-dominated with varying proportions of fluorapatite, phlogopite, magnetite, forsterite/chondrodite, and accessory...fine banding of mainly magnetite, apatite, and phlogopite in BCB to large patchy crystallization of the...thorianite (Figs. 3a–3e). Subsequent formation of phlogopite (with higher abundance in BCB; Figs. 3d–3f) is...Ca2(REE)3(SiO4)3(F,OH) olivine ol (Mg,Fe)SiO4 phlogopite phl KMg3(Si3Al)O10(OH,F)2 serpentine srp Mg6Si4O10(OH)8...chondrodite (Fig. 4g), occasional chloritization of phlogopite (Figs. 4h), and the formation of secondary apatite |  | | Journal (article/letter/editorial) | | Vuoriyarvi is one of the Devonian Kola Alkaline Province massifs [32]. Its concentrically zonal structure...Petyayan-Vara carbonatites are spatially associated phlogopite glimmerites metasomatically formed after pyroxenites...pyroxenites. The orientation and morphology of with phlogopite glimmerites metasomatically formed after pyroxenites...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 |  | | Journal (article/letter/editorial) | | REE- fluorocarbonates, pyrochlore, fluorite, and phlogopite of a dolomitic carbonatite’ was reported at the...carbonatites are: (1) British Columbia Alkaline Province, Canada (Pell 1994, Millonig et al. 2012); (2)...and one occurrence in Zambia); (b) Namibia and Angola; (c) Eastern Russia (East Tuva, Enisei, East Sayan...example the Ontario and Southwest Quebec carbonatite province covered by Woolley and Bailey (2012). Although...one of the silicates, forsterite, diopside, or phlogopite’. According to Krasnova et al. (2004), most of |  | | Journal (article/letter/editorial) | | (nepheline–clinopyroxene) or melilitoid (olivine– melilitite–phlogopite–clinopyroxene) suites. Some carbonatites have...(see below), and carbonatites in the East Sayan province, especially the Nizhnesayanskii and Bolshyetaginskoye...(Kogarko et al., 1995). Although the Kola Alkaline Province contains many carbonatites which have Nbpotential...carbonatites with country rocks are characterized by phlogopite-rich fenites (glimmerites). The Nb oxides in...pyrochlore, zirconolite etc.) and silicates (olivine, phlogopite), or apatite, grade into layers dominated by |  | | Journal (article/letter/editorial) | | et al. [37] report an age of 571 ± 5 Ma from phlogopite in the carbonatite while Kamenetsky et al. [38]...high temperatures (1000–1150 °C, C,using apatite-phlogopite main carbonatite crystallized at high temperatures...temperatures (1000–1150 using the the apatite-phlogopite geothermometer the Mg-carbonatite. Mg-carbonatite...2018, 8,higher x FOR PEER REVIEW presence of phlogopite [29,30] and chlorite [29]. The (Table S1) S1)...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineral. Mag. 2012, 76, 393–409 |  | | Journal (article/letter/editorial) | | dike composed of calcite and phlogopite (Phl), note bending of the phlogopite crystals indicating their... d Cumulate aggregate of apatite, magnetite, phlogopite and dolomite; Aley, Canada (SB 1 mm). e Primary...dominated by apatite, silicates (major olivine, phlogopite, diopside, nepheline, calcic amphibole or andradite...xenoliths and precipitation of silicate minerals (phlogopite, diopside, feldspars, amphiboles, titanite, andradite...Amp1 by fluororichterite (Amp2). f Magnetite-phlogopite-calcite carbonatite intersected by a veinlet |  | Starikova, Anastasia E., Bazarova, Ekaterina P., Savel’eva, Valentina B., Sklyarov, Eugene V., Khromova, Elena A., Kanakin, Sergei V. (2019) Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia, Russia. Minerals, 9 (8) 490 doi:10.3390/min9080490 | Journal (article/letter/editorial) | | standards: albite (Na, Al, Si); diopside (Ca); F-phlogopite (F, K, and Mg); garnet (Fe, Mn); (LiNbO3 (Nb);...arfvedsonite granite, Ririwai Complex, Younger Granites province of Nigeria. J. Asian Earth Sci. 2006, 44, 372–382...II carbonatitic complex (Alto Paranaíba Igneous Province, Brazil): Implications for regional-scale heterogeneities...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineral. Mag. 2012, 76, 393–409 |  | Lorenz, Melanie, Altenberger, Uwe, Trumbull, Robert B., Lira, Raúl, López de Luchi, Mónica, Günter, Christina, Eidner, Sascha (2019) Chemical and textural relations of britholite- and apatite-group minerals from hydrothermal REE mineralization at the Rodeo de los Molles deposit, Central Argentina. American Mineralogist, 104 (12) 1840-1850 doi:10.2138/am-2019-6969 | Journal (article/letter/editorial) | | the major phase was discovered in the San Luis province of Argentina during follow-up of an aerial radiometric...fluorite, feldspar, and quartz. Aegirine-augite and phlogopite are also paragenetically associated, as they...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineralogical Magazine, 76(2),...pegmatite formation: evidence from the Keivy alkaline province, Kola peninsula, NW Russia. Mineralogy and Petrology |  | Kozlov, Evgeniy, Fomina, Ekaterina, Sidorov, Mikhail, Shilovskikh, Vladimir, Bocharov, Vladimir, Chernyavsky, Alexey, Huber, Miłosz (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) | | silicocarbonatites, composed of dolomite, microcline, Ti-rich phlogopite, and Fe–Ti oxides. Alteration by a phosphate–fluoride...bastnäsite; 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 [7–9], Brazil Mongolia [52,53]...alkaline complexes of the Devonian Kola Alkaline Province [84]. The geological structure of this The Vuoriyarvi |  | 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) | | of Nb in these rocks is contained in rutile, phlogopite and, to a much lesser extent, amphibole. When...elongate carbonate grains, apatite, amphibole and phlogopite crystals, folding and brecciation (some examples...of mechanically twinned calcite, dolomite and phlogopite with bent cleavage planes. Based on their appearance...constituent of pseudomorphs after magnetite and phlogopite (Fig. 3d–f). Most dolomite carbonatites are recrystallized...containing dolomite pseudomorphs (Dol ps) after phlogopite and magnetite (PPL); (g) XPL photomicrograph |  | 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, Rb–Sr, and Sm–Nd Isotope Data. Minerals, 11 (7) 711 doi:10.3390/min11070711 | Journal (article/letter/editorial) | | Siberia—White Winter, Middle Winter (East Sayan province); the Nb–REE Chuktukonskoe deposit (Chadobetsky...richterite–magnesioarfvedsonite series, micas of the phlogopite– tetraferriphlogopite series, and accessory red-brown...zircon, and are accompanied by thick zones of phlogopite-richterite metasomatites. In addition, dolomite...Pyrochlore carbonatites phlogopite-richterite, phlogopite-richterite, and phlogopite metasomatites bearing...carbonatephlogopite-richterite, phlogopite-richterite, and phlogopite metasomatites bearing Nb and REE |  | | 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 “Afar” flood basalt province (compiled from Schandelmeier and Reynolds, 1997;...compositionally related to the mainly alkaline province of intraplate magmatism in north Sudan and south... and Maguire, P.K.H., eds., The Afar Volcanic Province within the East African Rift System: Geological |  | | Book | | . . . . . . . . . . . . . 2.12.1 Biotite and Phlogopite . . . . . . . . . . . . . . . . . Quartz . ....the Canary Islands, the North Atlantic Igneous Province and the Sunda Arc with a focus on magmatic crystals...outcrop is (by now) rather small. Note the large phlogopite crystals and the locally developed flow banding...sheet intrusion near Ås jetty shows the large phlogopite crystals typical for alnöite. Sövite and alkaline...(ac) and Alnö (acl) in Sweden; the Kola alkaline province (acl) in Russia; Sokli (cl) and Iivara (a) in |  | | Journal (volume) | | preferred mineralised zones with amphibolite-phlogopite schists acting as the host rock for emeralds...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...pluton. The emerald-bearing rocks are composed of phlogopite and variable amounts of talc, plagioclase, tremoliteactinolite...from the 207 Ma age of the emerald mines [2]. Phlogopite occurs as brown or black flakes up to a few mm |
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