 | | Journal (article/letter/editorial) | | discoveryof pyrochlore in carbonatites (Arax/t, 1947; Lueshe,1956) whichset up columbiumas one of the major...major depositsand especially Messrs.Bradford,A. Burne,Dr. de Neve, Major Farrington,Dr.Ing. Hermann, Messrs...The writer is indebted to Dr. Charles H. Behre,to Dr. RichardH. Jahnsand Dr. KennethBurke who kindly...diathreme. Internal StructureoI ColumbiumCarbonatites.-Lueshe: 1. core of busorite (canefinite syenite) 2. intermediatering...carbonatites with abundant mineralization (ex. Lueshe). 5. Concordant carbonatite bodies(ex. Kaluwe |  | | Journal (article/letter/editorial) | | Similar supergene occurrences occur at Lueshe and Bingo (D.R. Congo), Mabounié (Gabon), Sukulu (Uganda)...date, all major operating and former (Oka, Fen, Lueshe) Nb mines have been developed in primary carbonatites...only operating Nb mine in under-saturated peralkaline syenites is the Karnasurt mine (Kremenetsky et al...units presents in carbonatites e.g. the Loolekop mine at Phalaborwa (Fig. 250 of Woolley, 2001), Catalão-I...(Parsons, 1961; Pell, 1996) and a low grade niobium mine was operated by St. Lawrence Columbium at Oka (Quebec) |  | 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) | | lesser extent, amphibole. When the passive margin of North America became the zone of plate convergence in...covering the Precambrian basement rocks of the North American craton (Price, 1994 and references therein)...Neoproterozoic to Jurassic on the passive margin of the North American protocontinent and in the adjacent ocean...20% Nb2O5 cutoff Foreland belt (rifted margin of North America) ~370 Ma Dolomite carbonatites (calcite...Disputed between Société Lueshe, Rutshuru Dist., North Kivu, Democratic Minière du Kivu (Somikivu) and Krall |  | 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) | | set of faults oriented NE–SW that cut the Angola–Congo craton (Issa Filho et al., 1991). Different types...Mitchell, 2002). 6.6. Niobium-rich rutile (“ilmenorutile”) Crystals of niobium-rich rutile are zoned...systems, such as in a weathering profile in Lueshe, Congo (Wall et al., 1996). Oliveira et al. (2007,...studies in Barcelona were supported by an AECI grant. Dr. Xavier Llovet helped during EPMA analyses at the...Científico-Tècnics, Universitat de Barcelona. A. Crespi and Dr. J. Rius acquired in situ X-ray microdiffraction |  | 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) | | related to the Lucapa graben, a megastructure cutting Congo, Kasai and Angola Cratons and reactivated during...Kimberlite occurrences are concentrated at the north-eastern part of the graben whereas carbonatites...diameter) in the proximities of the complex, 3 km north or 1 km west of the plug (Figure 1). These intrusions...less than 10 microns in diameter, along with ilmenorutile and synchysite-(Ce). Tiny radial aggregates...During late stages, fine-grained aggregates of ilmenorutile and lucasite-(Ce) replace ilmenite and magnetite |  | | Journal (article/letter/editorial) | | strontianite, ancylite-(Ce), and Nb-bearing rutile (“ilmenorutile”). The chemical compositions of some minerals...magnetite, (Clb) columbite, (Ilrt) Nb-rutile (ilmenorutile), (Ap) hydroxyl-fluorapatite, (Po) pyrrhotite...Chuktukon massif, Chadobets upland, Krasnoyarsk territory, in Shchelochoni magmatizm Zemli, (Alkaline Magmatism)... Pyrochlores from the Lueshe carbonatite complex (democratic republic of congo): a geochemical record...Nasraoui, M., Pyrochlore from weathered carbonatite at Lueshe, Zaire, Mineral. Mag., 1996, vol. 60, pp. 731–750 |  | | Journal (article/letter/editorial) | | spinel Spinel (hercynite) Columbite (Nb-rich) Ilmenorutile Uranopyrochlore Ilmenite/rutile Uraninite...contains <3 wt% FeO. Nb-Ta oxides Columbite, ilmenorutile and uranopyrochlore-beta®te are common in BGY...crystallization. Greenville, Canada3 Range Average Lueshe, Zaire4 A The new two-feldspar inclusion is noteworthy...Province, Canada (8 analyses, after Ercit 1994), 4 Lueshe carbonatite, Zaire (A Ferrocolumbite, 1 analysis...England NSW, Australia Columbite Uranopyrochlore Ilmenorutile Ilmenite-rutile Spinel Hercynite Magnetite |  | | Book (edition) | | localities as inclusions in the limestone”’ (italics mine). Actually, the first published description of...‘‘fine-grained but crystalline,” (5) that they were 1] thank Dr. G. R. Udas for bringing this historic description...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted...G. B. Du Bois (1956, 1959), B. C. King (1949). Congo (Belgian): A. Meyer and P. de Bethune (1958, 1960)...) around a “core” of alkalic silicate rock: Lueshe, Congo, and Chishanya, Southern Rhodesia. In some cases |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | Ma) 4.1.1. Man Shield (Sierra Leone) NU 4.1.2. Congo Craton (DRC) 4.1.3. Zimbabwe Craton (Zimbabwe) ...Côte d'Ivoire) 4.2.2. North-eastern DRC (Ubendian, Orientale and northern North Kivu) D 4.3. Neoproterozoic...provinces MA 5.1. Archean 5.1.1. Man Shield 5.1.2. Congo Craton 5.2. Paleoproterozoic CE P 5.2.1. Birimian...Kaapvaal Craton D 5.1.3. Zimbabwe Craton 5.2.2. North-eastern DRC 5.3. Neoproterozoic 5.3.1. Kibara Belt...Shield (Sierra Leone), the Congo Craton TE (Democratic Republic of the Congo), the Kamativi Belt (Zimbabwe) |  | 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) | | orogenic belts, China [11,17–19]). In the Russian territory, such complexes are found in the Altai-Sayan fold...miaskite-syenite body (“saddle deposit”), lying 50 m north of the Vishnevogorsk massif, and is composed of...Baidashevskoe (Nb), 10—Ishkulskoe (Nb), 11—Ilmenskoe, 97 mine (Nb and REE), 12—Khaldikhinskoe, 13—Sungulskoe....9—Baidashevskoe (Nb), 10—Ishkulskoe (Nb), 11—Ilmenskoe, 97 mine (Nb and The REE),largest 12—Khaldikhinskoe, 13—Sungulskoe...monazite, bastnäsite, ortite, barite, thorite, ilmenorutile, apatite, titanite, magnetite, ilmenite, and |  | | Journal (article/letter/editorial) | | close in mineralogy to that of Li–F granites: ilmenorutile, monazite, yttrofluorite, niobium-bearing wolframite... Pyrochlores from the Lueshe carbonatite complex (Democratic Republic of Congo): a geochemical record...A.R., Pyrochlore from weathered carbonatite at Lueshe, Zaire, Mineral. Mag., 1996, vol. 60, pp. 731–750 |  | | Journal (article/letter/editorial) | | Mount Weld deposit (2.03 Ga), Yilgarn Craton. The mine operating here at the moment extracts only rare-earth...resources is contained in Nb-rich hypergene rutile (ilmenorutile), and, partially, in Nb– brookite, Nb–goethite...carbonatitic type, formed in the marginal part of the North China Craton (Zhang et al., 2017). Its complex ores...Mabouni foidolite–carbonatite massif (0.66 Ga), Congo Craton, hosting a Nb–REE–P–Ta deposit that has been...carbonatite massif (0.54 Ga) is located in the central North American Platform, beneath the 200-m cover of Phanerozoic |  | 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) | | deposit is located within the Balaio Indigenous Territory, within the Pico da Neblina National Park, and...years, mainly under its currently varietal name ilmenorutile. Nb-rich rutile occurs in all laterites, with...strontiopyrochlore (Lapin and Kulikova, 1989). At Lueshe (Wall et al., 1996), the most K-Nb-rich pyrochlore...carbonatites was described at Lueshe (Democratic Republic of the Congo) by Wall et al. (1996), who noted...Jr., 2012. Rare earth mining and exploration in North America. Elements 8, 369-375. Mitchell, R.H., 2005 |  | | Book | | Figures Springer-Verlag Berlin Heidelberg GmbH Prof. Dr. PETER MöLLER Hahn-Meitner-Institut Berlin GmbH Bereich...Reaktor Postfach 390128, D-1000 Berlin 30 FRG Prof. Dr. PETR CERNY Department of Earth Science University...Manitoba, Winnipeg Manitoba R3T 2N2 Canada Prof. Dr. FRANCIS SAUPE Centre de Recherehes Petrographiques...1950. The seeond is still oeeasionally used in North Ameriea. Thus, the entire suite of elements dealt...partial patterns of lanthanite(Ce) from the Britannia Mine, Wales, UK (Bevins et al. 1985) and oflanthanite-(N |  | | Report (issue) | | whereas the niobium-poor pegmatites of FranklinSylva, North Carolina, have muscovites that average only 94 ppm...pyrochlore group and aeschynite, and in ilmenite, ilmenorutile, fersmite, sphene, zircon, biotite, and rarely...in the independent niobiumtantalum minerals, ilmenorutile and pyrochlore. Higher concentrations of niobium...sornowhat modified here to include more examples of North American deposits. It is beyond the scope of this...tantalum from pegmatites (pegmatitic type) of the Congo region, Africa, and Brazil is the world's principal |  | Vrublevskii, V.V., Bukharova, O.V., Nebera, T.S., Sveshnikova, V.L. (2019) Composition and origin of rare-metal (Nb–Ta, REE) and sulfide mineralization in magnesiocarbonatites from the Yenisei Ridge, Central Siberia. Ore Geology Reviews, 111. 102949 doi:10.1016/j.oregeorev.2019.102949 | Journal (article/letter/editorial) | | of the geikielite component (MgO ~1.2 wt. %). Ilmenorutile from fenite has a high Nb enrichment with 6...thoughtful and encouraging reviews by Dr. Shuan-Hong Zhang and Dr. Jindrich Kynicky are gratefully acknowledged...Palaeoproterozoic Fengzhen carbonatite from the North China block. International Geology Review 58 (15)... Pyrochlores from the Lueshe carbonatite complex (Democratic Republic of Congo): a geochemical record...2004. Phoscorites and Carbonatites from Mantle to Mine: the Key Example of the Kola Alkaline Province. |  | | Book | | minerals were named when Zaire was called the Belgian Congo; this old term and similar ones are retained in...chemist and mineralogist; student of Torbern Bergman; mine owner and mineral analyst; trained J. J. Berzelius...and naturalist; professor at the University of North Carolina (1818—1857); author of Elements of Geology...California), perloffite (Louis Perloff, Tryon, North Carolina), yedlinite (Neal Yedlin, New Ha¬ ven,...made the first nonstop flight from Moscow via the North Pole to the United States, 1937. Francisco Vasquez |  | | Book | | View of the Oldoinyo Lengai stratovolcano from the north. The volcano is rising 2000 m above its surroundings...Oldoinyo Lengai, Tanzania. Lithos 91: 173–190 Sherrod DR, Magigita MM, Kwelwa S (2013) Geologic map of Oldonyo.... . . . . . . . . . . . . . . . . Route 1: The North Coast . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . 4.2 Road-Cutting North of Hartung (close to the Coastal Road) . . . . .... . . . . . . . . . . . . . . . . 4.11 Old Iron Mine at Stavsätt Farm in Släda . . . . . . . . . 4.12 |  | | Journal (article/letter/editorial) | | magnetites with atoll structure. Accessories are ilmenorutile, apatite, pyrochlore, fluorocarbonate, and zirkelite...substitution elements other than hafnium. 3q Ilmenorutile, Ž Ti 0.73 Nb 0.15 Fe 0.08 Na 0.02 Ca 0.01 Zr0...1996. Pyrochlore from weathered carbonatite at Lueshe, Zaire. Mineral. Mag. 60, 731–750. Wand, U., Stiehl |  | | Report (issue) | | ............................................M24 Mine Waste Characteristics ........................................................................M27 Mine Closure ..........................................complex in southern Quebec, Canada, and a schematic north-south crosssection along line A– A’ in A.......................M21 M13. Bar charts showing global mine production of niobium and tantalum, from 2000 to...de Metalurgia e Mineração Congo (Kinshasa) Democratic Republic of the Congo HFSE high-field-strength |  | | Journal (volume) | | Minerals Diamonds in Basutoland Carbonatite in Kivu, Belgian Congo Forthcoming Increase in Price of this Bulletin...CORRESPONDENCE The Itiaso Series of Western Tanganyika. From Dr. R. B. McConnell and C. B. Bisset 249 , 497 PERSONALIA...COLONIAL OFFICE PUBLICATION Geology of the Colony of North Borneo BY MAX REINHARD , PH.D. , AND EDUARD WENK...Special Reference to Work in the Colonies " , by Dr. F. Dixey 85 Colonial Mineral Production 85 Mineral...London and the field geologists in a Colonial territory. The investigation started in the Photo geological |  | | Book | | K(U02)As04*3H20, Tet. Vitreous yellow. Fuemrole mine, Temple Mt., Emery Co., Utah, USA. H= 2-3, Djjj=...grey, bluish-grey, yellow, light green. Langban mine, Filipstad (near), Varmland, Sweden. H= 5, Djjj=3...5As30ig, E Rhom. Translucent blue-green. Terres mine, St. Ausdell, Cornwall, England and/or Johanngeorgenstadt...804)3 •nH20, ® Hex. Transparent bluish. Lapis-lazuli mine, Sar-e-Sang, Badakshan, Afghanistan. H= 5.5-6, Djj4=...*21120, Mon. Vitreous colorless, white. Dutoitspan mine, Kimberley, South Africa. H= 4.5, Djjj= 2.630, D( |  | | Book (edition) | | This book is respectfully dedicated to the memory of Dr. John Sinkankas for his kind initiative and support...Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...by Strunz (1996). Thanks to the kind permission of Dr. E. Nagele from the E. Schweizerbart'sche Verlagsbuchhandlung...arisen with localities in Congo-Zaire: the country, named Democratic Republic of Congo since 1960, was changed...The former Kivu province is now divided to three regions: INTRODUCTION Nord-Kivu, Sud-Kivu, and Maniema |  | | Journal (article/letter/editorial) | | granular to intersertal. Accessory minerals include ilmenorutile, apatite, pyrochlore, fluoro-carbonate, and zirkelite...meteoric alterations of the Lueshe carbonatite complex (Democratic Republic of Congo) identified by REE study |  | | Book | | 1000° Mots inc. Native Gold on Quartz, Paymaster mine, South Porcupine, Ontario / Photo by Brian Boyle...Marquis imprimeur inc. Barite on Quartz, Rock Candy mine, Grand Forks, British Columbia / Photo by Ken Mayer...Mayer Publisher Pyromorphite, Society Girl mine, Moyie, British Columbia / Photo by Ken Mayer Mineralogical... Ontario Canada Diopside on Grossular, Jeffrey mine, Asbestos, Quebec / Photo by Jeffrey A. Scovil...including amateur col- lectors, company executives, mine owners, and vari- in the appropriate position. |
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