 | | Journal (article/letter/editorial) | | Mineralogy andgeochemistry of theLueshe deposit, Kivu, BelgianCongo... 734 Geochemical characterof ca...geochemical study of carbonatitesamplesfrom Lueshe,Kivu, Belgian Congo,by the combinedX-ray diffraction-flu...discoveringa niobium-bearingcarbonatitein Kivu, Belgian Congo. INTRODUCTION TEE ore minerals of nlobium...from the niobium-bearing carbonatiteof Lueshe,Kivu, Belgian Congo. characterized by a markedimpoverishment...typesof carbonatites. The simple carbonatiteof Lueshe, Kivu occursin the graben area where severalnephe |  | | Journal (article/letter/editorial) | | Pyrochlore from weathered carbonatite at Lueshe, Zaire F. WALl.,C. T. WILLIAMS,A. R. WOOIJ.EY Department...pyrochlore in the laterite above carbonatite at Lueshe, NE Zaire, has been made in order to determine...variations. Pyrochlore in fresh carbonatite at Lueshe is close to an ideal formula of (Ca,Na)2Nb206(OH...worldwide. As a result weathered pyrochlore at Lueshe has a large apparent A cation deficiency with A...remain stable. Abundant kalipyrochlore is unique to Lueshe and is thought to be related to the abundance of |  | | 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 |  | 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 |  | | 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 |  | | Journal (article/letter/editorial) | | border between Zambia and the Democratic Republic of Congo (DRC), is the largest sediment-hosted stratiform...Katanga Supergroup in the Democratic Republic of Congo, compiled after Cailteux et al. (2005) and Batumike... Three such phases were identified at the Nkana mine in Zambia (Brems et al. 2009). They are characterized...the Lower Orebody and Upper Orebody at the Nchanga mine in Zambia (McGowan et al. 2003). The Cu–Co mineralization...carbonatitic complexes in eastern central Africa (Kivu, DRC), which are interpreted to date the breakup |  | | Journal (article/letter/editorial) | | geographically separated areas, comprising the Shaba and Kivu provinces west of the Central African Rift and...In the west, the Kibara belt is limited by the Congo (Zaire) craton (although the border area is not...occurrences are known from Greenland, Scandinavia, India, Congo and Australia. Towards the later middle Proterozoic...of collision belts are the Grenvillean belts of North America and western South America, the Albany-Fraser...1986; Pinna et al., 1993:950-800 Ma). Towards the North, however, Mozambiquian collision is younging (in |  | | Report (issue) | | ~port- - - - -- - - - - - - - - Graph showing world mine production of niobium concentrate, for selected...larger, than was established when the decision to mine was made. Experts with a sound knowledge of a deposit...1970 1975 1980 1985 1990 • Year 2. World mine production of niobium concentrate, for selected...production is dominated by three producers that mine pyrochlore; the Araxa open pit in Minas Gerais,...state, also in Brazil, and the Niobec underground mine in Quebec Province, Canada. The Brazilian position |  | | Journal (article/letter/editorial) | | magnesio-arfvedsonite), sulfides (predominantly pyrrhotite and sphalerite), and less frequent olivine are...luorapatite, tetraferriphlogopite, magnetite, and pyrrhotite) some minerals carrying Zr, Nb, REE, Th, and...(ilmenorutile), (Ap) hydroxyl-fluorapatite, (Po) pyrrhotite. cases, a high UO2 content (up to 20 wt %) was...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 |  | Downes, Peter J., Dunkley, Daniel J., Fletcher, Ian R., McNaughton, Neal J., Rasmussen, Birger, Jaques, A. Lynton, Verrall, Michael, Sweetapple, Marcus T. (2016) Zirconolite, zircon and monazite-(Ce) U-Th-Pb age constraints on the emplacement, deformation and alteration history of the Cummins Range Carbonatite Complex, Halls Creek Orogen, Kimberley region, Western Australia. Mineralogy and Petrology, 110 (2) 199-222 doi:10.1007/s00710-015-0418-y | Journal (article/letter/editorial) | | magmatism, including carbonatites, in the Kimberley and North Australian Cratons over the Nuna–Rodinia supercontinent...peridotite. Complex, North Australian Craton, Northern Territory Mud Tank, North Australian Carbonatite...the Kimberley Craton with the remainder of the North Australian Craton to the east by ~1820 Ma (Fig....calcite carbonatite also includes minor grains of pyrrhotite, magnetite (≤5 mm long), galena and rare nioboaeschynite-(Ce)...phlogopite (phl) and opaque zirconolite (zlt) and pyrrhotite (po) (CR4, CDD1 177.42–177.5 m) intensity CL |  | 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) | | late-magmatic accessories (fluorocalciopyrochlore, pyrrhotite, pyrite, Cu-Pb-Zn-Ag sulfide and hessite, monazite-(Ce)...presence of carbonates with relatively high δ18O and pyrrhotite enriched in δ34S and 207Pb may be due to continental...estimated approximately from the composition of the pyrrhotite-sphalerite assemblage, sulfide minerals crystallize...vol. % apatite, 3–5 vol. % magnetite, and minor pyrrhotite, pyrochlore, and other accessories (Lapin et...identification of crystal structure in pyrochlore and pyrrhotite was applied to powder aliquots on a PANalytical |  | | Journal (article/letter/editorial) | | Saint Honoré (Canada) and Lueshe (Zaire – now Democratic Republic of Congo) supply about 90% of world...inherited together with apatite, phlogopite and pyrrhotite from phoscorites during their assimilation by...Carbonatites from Mantle to 514 ZAITSEV et al. Mine: the Key Example of the Kola Alkaline Province,...Nasraoui, M., Pyrochlore from Weathered Carbonatite at Lueshe, Zaire, Miner. Mag., 1996, vol. 60, pp. 731–750...Khibina alkaline massif, in Alkaline Magmatism of NorthEast Part of the Baltic Shield, Apatity: Kola Science |  | Walter, B.F., Parsapoor, A., Braunger, S., Marks, M.A.W., Wenzel, T., Martin, M., Markl, G. (2018) Pyrochlore as a monitor for magmatic and hydrothermal processes in carbonatites from the Kaiserstuhl volcanic complex (SW Germany) Chemical Geology, 498. 1-16 doi:10.1016/j.chemgeo.2018.08.008 | Journal (article/letter/editorial) | | Upper Fir in Canada, Tomtor in Russia, Lueshe in Dem. Rep. Congo) or re-evaluation (e.g., Panda Hill in...Common accessories include sulfides (pyrite, pyrrhotite, galena, NU sphalerite, chalcopyrite), barite...Phoscorites and SC carbonatites from mantle to mine: the key example of the Kola Alkaline Province 10:293-340...Underground mining and pyrochlore ore processing at Niobec mine, Quebec, Canada. Niobium:79-96. D Goodenough KM...In: Phoscorites and Carbonatites from Mantle to Mine: the Key Example of the RI Kola Alkaline Province” |  | Deditius, Artur P., Smith, Frances N. (Skomurski), Utsunomiya, Satoshi, Ewing, Rodney C. (2015) Role of vein-phases in nanoscale sequestration of U, Nb, Ti, and Pb during the alteration of pyrochlore. Geochimica et Cosmochimica Acta, 150. 226-252 doi:10.1016/j.gca.2014.11.024 | Journal (article/letter/editorial) | | secondary phases from tailings of Silver Crater Mine in Bancroft, Ontario (Canada) have been studied...collected from a tailings pile at Silver Crater Mine in Bancroft, Ontario (Canada), where a carbonatite...Fe-rich biotite, zircon, apatite, fluorite, pyrite, pyrrhotite, molybdenite, and pyrochlore group minerals (Alexander...1993). The U-Pb dating of uraninite from the Faraday Mine in the Bancroft indicated ages of 1059-1020 Ma (Little...alteration of metamict betafite from Silver Crater Mine was studied by Lumpkin and Ewing (1996), which identified |  | | Catalog/List | | ___ 2x2£3 ___ - -----~ - ~014_ _ 88 ADAMITE Ojuela Mine, Mapimi, Mexico 69 ALUMOHYDROCALCITE South Bay,...- - --··---- - - - - - · . 767 AJOITE Christmas Mine, Gila County, Arizona USA 17 ANAL CITE Talisker...1009 ANDALUSITE Ultevis,North Sweden 501 ALLOPHANE New East Whcal Russell mine, Devon ,England variety...217 ANDORITE San Jose Mine, Oruro, Bolivia 1129 ■ ALMANDINE Brnstad iron Mine near Arendnl ,Norway Pure...Bcnallt Minc,Llcyn. Wales 1036 ALSTONITE Fnllowlielcl Mine, Northumberland White masses in malrix wilh micro |  | | 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 |  | | Catalog/List | | massive with minor Celsian and Bementite from Benallt Mine, Lleyn, Wales, (Recently tested by XRD) lxl £4 lx2...£15 £6 88 ADAMITE Ojuela Mine, Mapimi, Mexico 1036 ALSTONITE Fallowfield Mine, Northumberland Colourless...x2 £ 1.50 2x2 £3 Al SO/4 767 ■ AJOITE Christmas Mine, Gila County, Arizona USA 14 ALUMINITE Railway cutting...~-------·-·-- ·· -·· 1077 ■■ ALLOPHANE Hawkswood Mine, Cornwall 933 ANATASE Hingston Quarry,Cornwall Black...Kola Russia 501 ALLOPHANE New East Wheal Russell mine, Devon ,England grey bleby small botryoidal with |  | | Catalog/List | | ----·-·- ---- ·- -- 1129 ALMANDINE Brastad iron Mine near Arendal ,Norway 87 ■ BERYL Evje area . South... . --- .. ------- - -· 1009 ANDALUSITE Ultevis,North Sweden 1099 CATAPLEIITE Bratthagcn, near Larvik...---·-··----·------ ·- - ---27 ANTHOPHYLLITE Kaveltorp Mine Sweden 1008 CHRYSOBERYL Kolsva. Vastmanland Sweden...--~----· ·---·-------- -- -62 COBAL TITE Bolidcn Mine, North Sweden 1003 ARSENIOPLEITE Sjogruvan,Ridd arhyllan...single cubic 4mm crystal with slight damage, in Pyrrhotite £5 CoAsS 215 ILMENITE Odegardensverk, near |  | | Catalog/List | | lllSMUTI-IINl'fE IN CI-IALCOl'YRITI!:, Fowey Consols mine, Tywardreath, Cornwall. I0.5x6.5x4. l cm. A strangely...bismuthinite present. £175. 5. BLISTER COPPER, Dolcoath mine, Camborne, Cornwall. 7x7x3cm. A chalcopyrite variety...Cornwall. Fantastic pecimen. £275. 13ORNITE, Tincrort mine, Redruth, Cornwall. 8x6x4.6cm. I\ sandy coloured...David New label. £275. 7. IJOURNONITE, Herodsfool mine, Lanreath, Cornwall. 6.5x5x3.Jcm. A quartz matrix...specimen. £ 150. CALCITE ON PYRITE, New Rosewarne mine, Gwincar, Cornwall. 8. S.7x5.5x3cm. A light coloured |  | | Journal (article/letter/editorial) | | rutile-ilmenite solid solution, calcic plagioclase, Ni-rich pyrrhotite, thorite and low-Si and Fe-rich glassy inclusions...gahnospinel, thorite, calcic palgioclase and Ni-rich pyrrhotite. The wide occurrence of primary Fe-rich spinels...(sulphides, etc.) Mineral phase Analysis wt% Pyrrhotite Ni-pyrrhotite Cu-pyrrhotiteb Mineral phase Analysis...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 |  | | Journal (article/letter/editorial) | | work in J ulianehab district and moved further north to the Frederikshab district. It was then decided...THOMSEN, to the former head of the chemical department Dr. C. F. JACOBSEN and the head of the electronic department...pyrolusite: B0GGILD (1953). pyrophanite: SEMENOV. pyrrhotite: FERGUSON (1964). quartz: UssING (1898). ramsayite:...Medd. Gr0nland 172,4, 1-81. (Antigorite, Pyrite, Pyrrhotite, Stilbite). - 1967: The alkaline igneous intrusion...niobium-bearing minerals of the Lueshe carbonatite deposit (Kivu, Rep. Congo). Euratom 2110 e, 1-31. WAGER |  | | 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 |  | | Catalog/List | | £10 2x2 £15 Ix! £3 lx2 £6 I · 88 ADAMITE Ojuela Mine, Mapimi, Mexico Colourless to yellow small crystals...£10 2x3 £15 Na Ca SiO F 7fJ 7 ■ AJOITE Christmas Mine, Gila County, Arizona USA Blue veinlets in matrix...5cm £4 no/2 feldspar 37 ANCYLITE Ce Dark Star Mine,Ravalli County, Montana U.S.A Rich pinkish fine...£7.50 Ag Sb 501 ALLOPHANE New East Wheal Russell mine, Devon ,England grey bleby small botryoidal with... lx2 £3 2x2 £6 2x3 £10 1009 ANDALUSITE Ultevis,North Sweden variety VIRIDINE (Mangan rich variety) Olive |  | LEE, MI JUNG, LEE, JONG IK, GARCIA, DANIEL, MOUTTE, JAQUES, WILLIAMS, C. TERRY, WALL, FRANCES, KIM, YEADONG (2006) Pyrochlore chemistry from the Sokli phoscorite-carbonatite complex, Finland: Implications for the genesis of phoscorite and carbonatite association. GEOCHEMICAL JOURNAL, 40 (1) 1-13 doi:10.2343/geochemj.40.1 | Journal (article/letter/editorial) | | also contains various sulfide minerals such as pyrrhotite, pyrite, chalcopyrite and sphalerite. Pyrochlore...altered parts is also reported from the Bingo and Lueshe pyrochlores (Williams et al., 1997). Comparison... Acknowledgments—The authors would like to thank Dr. Heikki Vartiainen (Ministry of Trade and Industry...Helsinki), Professor Seppo Gehör (University of Oulu) and Dr. Robert Perander (Kemira Oy Company, Finland) for...during the field work and sampling in the drill cores. Dr. L. N. Kogarko and an anonymous reviewer are acknowledged |  | 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...intergrowths along with nepheline, augite, melilite and pyrrhotite. 5.2.3. Calciocarbonatite Xenoliths Calciocarbonatite...scattered pyrrhotite (Po); (d) BG-10a. Phlogopite-rich and melilite (Mll), with scattered pyrrhotite (Po); |
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