 | | Journal (issue) | | maand worden specimens van hydropyrochloor van Lueshe, Congo aangeboden. Meer details hierover vind je elders...staat, waarvoor uiteraard onze excuses. Onze spreker, Dr. Ernst Burke, is geen "Noorderbuur", maar een ras-echte...vice-voorzitter was gedurende een paar jaren een Belg, namelijk Dr. Frédéric Hatert uit Luik. Wie aanwezig was op de...MINERAL HS XV, 2009 Themanummer : "Les minéraux de la Mine des Farges, Ussel (Corrèze), France" - 84 pp. ...Vielflächige Phantome in Fluoritkristalle (Okorusu mine, Namibia) 30-31 Perowskit im Steirisch-Bürgenländischen |  | | Journal (article/letter/editorial) | | Petrology and geochemistry of the carbonatite and syenite complex of Lueshe (N.E. Zaire) H. v. MARAVIC& G...complex of Lueshe (N E. Zaire). Lithos 13, 159-170. Oslo. ISSN 0024-4937. The Lueshe carbonatite is intr~lded...show a weak fenitisafion at the contact to the carbonatite complex. Petrographical and chemical investigations...I vol. % are typical. The carbonat;,ies ot the Lueshe alkal;ne complex are mainly s6vites with some alvikites...135, D-IO00 Berlin 12. Tyskland. The carbonatite complex of Lueshe like those of Monbadio, Bingo, Kirumba |  | | 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) | | IN WEATHERED PYROCHLORE-GROUP MINERALS FROM THE LUESHE AND ARAXÁ (BARREIRO) CARBONATITES BY 57Fe MÖSSBAUER...Nb ore deposits in laterite: Lueshe in the Democratic Republic of Congo, and Araxá in Brazil. In contrast...oxidation state in the kalipyrochlore sample from Lueshe. Spectra of both samples are consistent with the...coordinated by 6 O2– is observed in both cases. In the Lueshe sample, it is also coordinated by 5 O2– and 1 OH–...gisements latéritiques à Nb, celui de Lueshe en République Démocratique du Congo et celui d’Araxá au Brésil, l’idée |  | | Journal (article/letter/editorial) | | Pyrochlore from weathered carbonatite at Lueshe, Zaire F. WALl.,C. T. WILLIAMS,A. R. WOOIJ.EY Department...weathered pyrochlore in the laterite above carbonatite at Lueshe, NE Zaire, has been made in order to determine...textural 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...carbonatites:s/Svite,rauhaugite, alvikite, ankeritic carbonatite b. fenites: pyroxene fenitc, feldspathicfenitc...carbonatitetype 4. Pneumatolytic-hydrothermal a. carbonatite b. carbonate-silicate veins c. quartz-mica |  | | Report (issue) | | 519(1) c = 5.505(1) Z=8 X-ray Powder Pattern: Lueshe, Congo. 3.91 (100), 2.77 (69), 1.955 (43), 1.96 (34)...46] 100.00 Na2 O TiO2 3.62 12.23 18.91 (1) Lueshe, Congo; Fe2 O3 and TiO2 on a separate sample, SiO2...the contact of cancrinite syenite with carbonatite (Lueshe, Congo); in sodalite xenoliths associated with...(Ilı́maussaq intrusion, Greenland). Association: Mica (Lueshe, Congo); sodalite, ussingite, villiaumite, steenstrupine...Distribution: From the Lueshe carbonatite, 150 km north of Goma, Kivu Province, Congo (Zaire). At Gem Park |  | | Journal (article/letter/editorial) | | production of Nb, with the primary St. Honoré carbonatite and other sources accounting for only for 7 and...individual petrographically-defined units of carbonatite contain distinct suites of pyrochlore. Bulk rock...10 times or more above those of the primary carbonatite. Commonly, pyrochlores in laterites are fine grained...and 1%, respectively. Mining at the Catalão-I carbonatite was discontinued in 2001, although there is a...(Cordeiro et al., 2011). Many other occurrences of carbonatite are currently being evaluated [e.g. Aley and |  | | Journal (article/letter/editorial) | | been found in the Kirumba syenitic massif, Kivu, Rep. of Congo (Kinshasa). Its properties are described...massif and the alkaline complex with carbonatites of Lueshe. Une seconde occurrence de davidite non-metamicte...dans le massif sy4nitique des Kirumbas, Kivu, R4p. du Congo (Kinshasa). Ses propri4t4s sont d4crites...Kirumbas et le complexe alcalin ~ carbonatites de Lueshe. Since its first description by Mawson in 1906...minerals of the Kirumba massif, in the north-eastern Kivu, Rep. of Congo (Kinshasa), non-metamict davidites |  | Mitchell, Roger H., Burns, Peter C., Knight, Kevin S., Howard, Christopher J., Chakhmouradian, Anton R. (2014) Observations on the crystal structures of lueshite. Physics and Chemistry of Minerals, 41 (6) 393-401 doi:10.1007/s00269-014-0657-1 | Journal (article/letter/editorial) | | perovskite-group mineral lueshite from the type locality (Lueshe, Kivu, DRC) and pure NaNbO3 demonstrate that lueshite...crystal structures of lueshite (2 samples) from Lueshe, Mont Saint-Hilaire (Quebec, Canada) and Sallanlatvi... Conventional neutron diffraction patterns for Lueshe lueshite recorded over the temperature range 11–1...Time-of-flight neutron diffraction patterns for Lueshe lueshite recorded from room temperature to 700...from the Lueshe carbonatite complex (Maravic et al. 1989), North Kivu (Democratic Republic of Congo) by Safianikoff |  | | Journal (article/letter/editorial) | | Carbonates of the magnesite-siderite series from four carbonatite complexes H. A. BUCKLEY AND A. R. WOOLLEY Department...been found and analysed in carbonatites from the Lueshe, Newania, Kangankunde, and Chipman Lake complexes...liquidus phase and it is proposed that the Newania carbonatite evolved directly from a Ca-poor, Mg-rich carbonatitic...pressures >32 kbar. K EYWO RD S: carbonate, carbonatite complexes, magnesite, siderite, breunnerite....siderite. Material analysed and results Lueshe, Zaire. Lueshe is a complex of carbonarites, including |  | | Journal (article/letter/editorial) | | Minerals from the Bingo Niobium Deposit, Kivu, Democratic Republic of Congo L. VaN WaMBZKE J o i n t Research...(Mount Home) in the north-eastern part of the Kivu, Democratic Republic of Congo (Kinshasa), was discovered...Nb-Sr-Ba-RE of carbonatite deposits observed also at Araxa, Brazil, and at Lueshe, Congo. Pandaite and...deposit. This mineral, not previously found in the Congo, is known from Panda Hill, Tanzania and from Araxa...Study of Some Niobium-Bearing Minerals of the Lueshe Carbonatite Deposit -- Rep. EUR 240e. 31 p. (1965). - |  | | Journal (article/letter/editorial) | | Northern Ireland The isotopic comp~i~on of carbonatite =a kimberlite carbonates andtheir bearing on...on the carbon isotopie composition ranges of carbonatite and kimberlite carbonates shows that they are...isotopio oomposition of carbonates from 22 selected carbonatite complexes ( --6*1yW, 8 = fl*40/, vs PDB) is indistingnishable...~~bona~s of higher @a content ( -2.4 to -4~433. If carbonatite and kimberlite carbonates ae well as diamonds...be meaningless, as the source of kimberlite, carbonatite and diamond carbon may not be isotopically uniform |  | 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) | | homepage: www.elsevier.com/locate/oregeorev Carbonatite-hosted niobium deposit at Aley, northern British...Available online xxxx Keywords: Aley niobium deposit Carbonatite Metasomatic rocks Pyrochlore-group minerals Columbite-group...lesser extent, amphibole. When the passive margin of North America became the zone of plate convergence in...this article as: Chakhmouradian, A.R., et al., Carbonatite-hosted niobium deposit at Aley, northern British...key examples are listed in Table 1. The Aley carbonatite complex in northern British Columbia, Canada |  | | Report (issue) | | [0.05] . Total [99.86] [99.89] 100.74 (1) Lueshe, Congo; original total given as 100.192%, corrected...alluvial deposits and residual soils from a carbonatite deposit, formed from pyrochlore by the leaching...Distribution: In the Lueshe carbonatite, 150 km north of Goma, Kivu Province, Congo (Zaire). Name: For |  | | Journal (article/letter/editorial) | | Brevik, Norway; nephelinesyenite Lueshe, Lake Kivu, Zaire; carbonatite Hybla, Ontario, Canada; granitic...nephelinesyenite Aln6. Sweden: carbonatite Gastineau River. Ontario. Canada; carbonatite Panda Hill, Mbeya, Tanzania;...Tanzania; carbonatite Woodcox mine, Hybla, Ontario; granitic pegmatite MacDonaldmine,Hybla,Ontaio; granitic...Panda Hill, Mbeya, Tanzania; carbonatite Leushe, Lake Kivu, Zaire; carbonatite Fredricksvarn,NoMay; nepheline...nepheline syenite Lueshe, Lake Kivu, Zaire; carbonatite Lueshe, Lake Kive, Zaire; carbonatite Jacupiranga,Sao |  | | Journal (article/letter/editorial) | | meteoric alterations of the Lueshe carbonatite complex žDemocratic Republic of Congo / identified by a REE...whole-rock samples of the Lueshe carbonatite complex ŽNE of Democratic Republic of Congo.. The fresh and hydrothermally...fluorhydric-nitric solution ŽHF q HNO 3 .. The Lueshe carbonatite complex contains a suite of REE-carriers...Science B.V. All rights reserved. Keywords: Carbonatite; Hydrothermal alteration; Meteoric weathering;...weathering; Rare-earth elements; Republic of Congo 1. Introduction Among the chemical characteristics of carbonatites |  | | Journal (article/letter/editorial) | | intrusions of the rift border and lavas from Southern Kivu, Southern and Western Virunga. The intrusions have...lavas, sub-alkaline basalts, appear in Southern Kivu at the Eocene. They are followed by alkaline basalts...Miocene, and then at the lower Pleistocene. To the north, some earlier volcanic remains of alkaline sodic...alcalines situ6es en bordure du rift et des laves du Sud-Kivu, du sud et de l'ouest des Virunga. Les intrusions... des basaltes sub-alcalins, apparaissent au Sud-Kivu ~t l'Eoe~ne. Elles sent suivies par des basaltes |  | | Journal (article/letter/editorial) | | carbonatites at Argor, Carillon Dam, Chilwa Island, Fen, Lueshe, Oka, Mbeya, Meech Lake and Verity. Primary features...e veinlets and low A-ion totals (Carillon Dam, Lueshe, Myeba). K EY WORDS : zoned crystals, carbonatites...to Ce4+ in some pyrochlore from laterite (e.g. Lueshe and Mbeya of this paper; see below) it is not possible...pyrochlore pyrochlore,uranpyrochlore Mineral Lueshe, Dem. Rep. of Congo San Vicente, Cape Verde Is. Kovdor,... Russia Amba Dongar, India carbonatite, Siberia Mt. Weld, Western Australia Qaqarssuk, Greenland Dixon |  | | Report (issue) | | Madagascar. In the Lueshe carbonatite, 150 km north of Goma, Kivu Province, Congo (Zaire). At the Shirashi...Japan. In the Bayan Obo Fe–Nb–RE deposit, 130 km north of Baotou, Inner Mongolia, China. At Nam Nam Xe...Name: Honors J.J. Paris, Manager of the emerald mine at Muzo, Colombia. References: (1) Palache, C. |  | | Report (issue) | | complex, near Field, British Columbia; in the Desmont mine, Wilberforce, Ontario. In the USA, in the Sheep...Jacupiranga mine, São Paulo, Brazil. At the Lueshe carbonatite, 150 km north of Goma, Kivu Province, Congo...Congo (Zaire). Name: From the Greek for curved, in allusion to the characteristically curved crystals |  | | Journal (article/letter/editorial) | | pyroxenite; its bearing on the composition of carbonatite magmas J. GITTINS, C. R. ALLEN & A. F. COOPER...clinopyroxenites and carbonatite dikes of the Cargill ultramafic rock-carbonatite complex near Kapuskasing...intrusion of carbonatite into pyroxenite and is further testimony to the fact that many carbonatite magmas...rocks and crystallize as calcitic and dolomitic carbonatite with alkali contents restricted to the amounts...of the carbonatite magma. Abundant evidence for considerable amounts of fluorine in carbonatite magmas |  | | Report (issue) | | Co., California; at the Foote mine, Kings Mountain, Cleveland Co., North Carolina; Granite Mountain, near...Manitoba. From the Lueshe carbonatite, 150 km north of Goma, Kivu Province, Congo (Zaire). A few other |  | 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) | | Niobium and rare earth minerals from the Virulundo carbonatite, Namibe, Angola L. TORRÓ1, C. VILLANOVA1, M...Editor: Hilary Downes] ABSTRACT The Virulundo carbonatite in Angola is one of the largest in the world...mineral in all of the carbonatite units (calciocarbonatites, ferrocarbonatites, carbonatite breccias and trachytoids)...quartz-carbonate-fluorite vein formation in the carbonatite, has produced a third generation of pyrochlore...depleted in Ca and Na. K EY WORDS : Angola, carbonatite, pyrochlore, REE, magmatic, hydrothermal, weathering |  | Cordeiro, Pedro Filipe de Oliveira, Brod, José Affonso, Palmieri, Matheus, de Oliveira, Claudinei Gouveia, Barbosa, Elisa Soares Rocha, Santos, Roberto Ventura, Gaspar, José Carlos, Assis, Luis Carlos (2011) The Catalão I niobium deposit, central Brazil: Resources, geology and pyrochlore chemistry. Ore Geology Reviews, 41 (1) 112-121 doi:10.1016/j.oregeorev.2011.06.013 | Journal (article/letter/editorial) | | Available online 22 July 2011 Keywords: Catalão I Carbonatite Phoscorite Nelsonite Pyrochlore a b s t r a...a c t The Catalão I alkaline–carbonatite–phoscorite complex contains both fresh rock and residual (weatheringrelated)...plug-shaped orebodies named Mine II and East Area, respectively emplaced in carbonatite and phlogopitite. Together...unit) or magnetite-rich (P3 unit). Dolomite carbonatite (DC) is intimately related with nelsonite. Natropyrochlore...the Catalão I niobium deposit is related to carbonatite magmatism but the process that generated such |
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