 | 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 |  | 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...carriers for critical raw materials such as Nb, REE, fluorite and phosphate but also of Cu, Mo, Fe, barite,...Verde [69,70]), hypabyssal (Bonga [67,68,70]; Virulundo [71]) and extrusive (Catanda; [67,68,72]). The...the largest in the world and are mineralized in fluorite [73], iron and pyrochlore [74], with many mining |  | 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...Geological setting Most of the carbonatite complexes in Angola are found in the Lucapa structure (deVries Lapido-Loureiro...1200 km set of faults oriented NEâSW that cut the AngolaâCongo craton (Issa Filho et al., 1991). Different |  | | Journal (article/letter/editorial) | | calorimetry, heat of formation, pyrochlore, defect fluorite, rare earth minerals Introduction The rare earth...containing small rare earth cations exhibit the fluorite Fm3m structure, microdomains of pyrochlore phase...belongs to the intrinsically disordered defect fluorite structure, while for bigger RE cations the structure...exothermic formation enthalpies. In the pyrochlore and fluorite compounds containing a large A cation and a smaller...enthalpies of formation of the niobates with defect fluorite structure can be compared to those of compounds |  | | Journal (article/letter/editorial) | | during supergene alteration of the Virulundo carbonatite, Angola, but this phase has not been approved...Superprovince, the Palaeogene Hebridean Igneous Province (Emeleus & Bell, 2005), consists of igneous centres...granites but the common occurrence of accessory fluorite in the Palaeogene granites (Thompson, 1983) suggests...The acid igneous rocks of the British Tertiary Province. Bull. Geol. Surv. G.B, 70, 10â22. Melluso, L...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineral. Mag, 76, 393â409. Vilalva |  | 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) | | pegmatite formation: evidence from the Keivy alkaline province, Kola peninsula, NW Russia Dmitry R. Zozulya 1...Springer-Verlag Wien 2017 Abstract The Keivy alkaline province, Kola Peninsula, NW Russia, consists of vast alkali...saturation resulted in precipitation of abundant fluorite due to a temperature drop. Variations in REE and...fluid of CO2 and/or H2O. Keywords Keivy alkaline province . Kola peninsula . Nepheline syenite . Pegmatite...pegmatite from the Late Archean Keivy alkaline province in the Kola Peninsula, NW Russia. It is noteworthy |  | Lorenz, Melanie, Altenberger, Uwe, Trumbull, Robert B., Lira, RaĂșl, LĂłpez de Luchi, MĂłnica, GĂŒnter, 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) | | fluorcarbonates, and is associated with hydrothermal fluorite, quartz, albite, zircon, and titanite. The REE...the major phase was discovered in the San Luis province of Argentina during follow-up of an aerial radiometric...studies and stable isotope ratios in associated fluorite. In this contribution, we present the results...composite [REE fluorcarbonates, fluorapatite, fluorite ± fluorbritholite-(Ce)] within the fenite. (d)...sample further contains late stage quartz (Qz), fluorite (Flr), and carbonate (Cb) veins cross-cutting |  | 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) | | ap mnz Ca5(PO4)3(F,OH) (REE,Ca)PO4 HALIDES: fluorite fl CaF2 PCC belongs to the Ce-enriched, Nd-dominated...dolomite (Figs. 6aâ6c) and is associated with fluorite, strontianite (Fig. 6d), or ancylite (see below)...(d) the additional presence of strontianite and fluorite. (e and f) Relics of monazite around apatite with...low-temperature phase in the Virulando carbonatite (Angola) where it formed during late-stage supergene alteration...may form strontianite, parisite/synchysite and fluorite in the interstices of the REEFC-I interdigitation |  | | 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 |  | | Report (volume) | | 1920-77 14 15 16 TABLES Page TABLE 1. 2. 3. 4. Fluorite in Africa------------------------------------------Selected...from Angola, Kenya, Morocco, Mozambique, Namibia, South Africa, Tanzania, and Uganda. Fluorite has been... contributed fluorine to the basins. Possibly fluorite will be found in Cenozoic tuffaceous lake beds...mineral fluorite (CaF 2), usually more than 20 percent, to be of commercial interest. Fluorite is 48.7...ENVIRONMENTS AND TYPES OF FLUORSPAR DEPOSITS Fluorite is a fairly soft (hardness of 4 on the Mobs scale) |  | Zozulya, Dmitry, Lyalina, Lyudmila, Macdonald, Ray, BagiĆski, BogusĆaw, Savchenko, Yevgeny, Jokubauskas, Petras (2019) Britholite Group Minerals from REE-Rich Lithologies of Keivy Alkali GraniteâNepheline Syenite Complex, Kola Peninsula, NW Russia. Minerals, 9 (12) 732 doi:10.3390/min9120732 | Journal (article/letter/editorial) | | Background and REE-Rich Occurrences The Keivy alkaline province consists of 2.67â2.65 Ga aegirine-arfvedsonite...map of the western part of the Keivy alkaline province, Kola Peninsula, Figure 1. Simplified map of the...the western of the Keivy alkaline associated province, with Kola NW Russia, showing geological the location...rocks Peninsula (boxed area). The of the Keivy province are extremely enriched in Zr (300â5000 ppm), Y...phases. Dozens of pegmatite bodies from the Keivy province are confined to the inner and outer apical parts |  | Starikova, Anastasia E., Bazarova, Ekaterina P., Savelâeva, 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) | | abbreviated as Bsn = bastnĂ€site, Clm = columbite, Fl = fluorite, Gg = gagarinite-(Y), Pcl 1 = primary abbreviated...abbreviated as Bsn = bastnĂ€site, Clm = columbite, Fl = fluorite, Gg = gagarinite-(Y), Pcl1 = primary = secondary-I...arfvedsonite granite, Ririwai Complex, Younger Granites province of Nigeria. J. Asian Earth Sci. 2006, 44, 372â382...II carbonatitic complex (Alto ParanaĂba Igneous Province, Brazil): Implications for regional-scale heterogeneities...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineral. Mag. 2012, 76, 393â409 |  | | Journal (article/letter/editorial) | | polycrystalline clusters, commonly associated with barite, fluorite, hematite, quartz, strontianite and sulphidesâ...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 |  | | 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...interactions. However, unlike most similar massifs, fluorite was not formed. This preserved niobium in the...Salpeterkop carbonatite complex, Western Cape Province, South Africa. J. Afr. Earth Sci. 1995, 21, 171â186 |  | | Journal (article/letter/editorial) | | Nature and genesis of a carbonatiteassociated fluorite deposit at Speewah, East Kimberley region, Western...Editorial handling: L. Gwalani Summary The Speewah fluorite deposit (>2.28 Mt at 25.5% CaF2) is sited adjacent...Yungul carbonatite. The deposit comprises mainly fluoriteâquartz veins associated with lesser barite, sulfides...relationships indicate that the fluorite veins were deposited post Early Cambrian. Fluoriteâquartz vein textures...data from primary fluid inclusions, indicate that fluorite was deposited by the incremental infill of open-space |  | | Journal (article/letter/editorial) | | present, include apatite, barite, monazite and fluorite (Figs. 5e and 7a, b). Very limited data are available...inclusions of calcite, burbankite, apatite and fluorite (Fl); Chipman Lake. b Calcite oikocryst containing...associated with dolomite, strontianite, barite, fluorite, ancylite, REE fluorocarbonates, chlorite, titanite...and Sr, Pb isotope distribution in hydrothermal fluorite. Geochim Cosmochim Acta 67:4577â4595 Buob A (2003)...to mine: the key example of the Kola Alkaline Province. Min Soc, London, pp 247â291 Chakhmouradian AR |  | Sun, Zhenghao, Qin, Kezhang, Mao, Yajing, Tang, Dongmei, Wang, Fangyue, Evans, Noreen J., Zhou, Qifeng (2022) Mineral Chemistry of Pyrochlore Supergroup Minerals from the Boziguoer Nb-Ta-Zr-Rb-REE Deposit, NW China: Implications for Nb Enrichment by Alkaline Magma Differentiation. Minerals, 12 (7) 785 doi:10.3390/min12070785 | Journal (article/letter/editorial) | | trophyllite, thorite, monazite, bastnasite, xenotime and fluorite. Most form either granular astrophyllite, thorite...thorite, monazite, bastnasite, xenotime and fluorite. Most form either granular aggregates, single crystals... Hefei University of Technology, Hefei, Anhui Province, China. These analyses were undertaken using an...and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Miner. Mag. 2012, 76, 393â409....arfvedsonite granite, Ririwai Complex, Younger Granites province of Nigeria. J. Afr. Earth Sci. 2006, 44, 372â382 |  | 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) | | 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]...alkaline complexes of the Devonian Kola Alkaline Province [84]. The geological structure of this The Vuoriyarvi...alkaline complexes of the Devonian Kola Alkaline Province [84]. The geological structure of this geochemically |  | 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) | | monazite, baddeleyite, thorianite, barite and rutile. Fluorite, allanite, pentlandite, bradleyite [Na3Mg(PO4)(CO3)]...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 |  | 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...carbonatite complex (for example, Tchivira carbonatite, Angola [127]). As known, oscillatory zoning in pyrochlore...apatite, barite, hematite, ilmenorutile, quartz, and fluorite. These data support the model of formation of... NbâTaâP NeskeVaara deposit (Kola carbonatite province) and some others). REE specialization is typical...carbonatite complexes Minerals 2021, 11, 711 province (EACL) [32], Siberia [121,172,173], Aldan [40 |  | | 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... and Maguire, P.K.H., eds., The Afar Volcanic Province within the East African Rift System: Geological |  | | Book | | the Canary Islands, the North Atlantic Igneous Province and the Sunda Arc with a focus on magmatic crystals...various dykes of âborengiteâ, a dyke rock with a fluorite-rich potassic trachyte composition (see text for...(ac) and Alnö (acl) in Sweden; the Kola alkaline province (acl) in Russia; Sokli (cl) and Iivara (a) in...trachytes contain blebs of violet, greenish or grey fluorite and/or calcite e.g. at the type occurrence of...present, but in smaller quantities are calcite, fluorite (white, yellow, greenish, and violet), pyrite |  | | 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...beryl, chrysoberyl, tourmaline, corundum, apatite, fluorite, relict chromium spinel, and zircon. The 248 Ma...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 |
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