 | | 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...foundin potash-rich pegmatites especially in the quartz-perthite-plagioclase-muscovite zone and may be...somesodalithia pegmatitesprincipallyin cleavelandite-quartz-spodumene zone or less commonlyin replacementbodiesof |  | | Journal (article/letter/editorial) | | geochemistry of the carbonatite and syenite complex of Lueshe (N.E. Zaire) H. v. MARAVIC& G. MORTEANI I/triOS...syenite complex of Lueshe (N E. Zaire). Lithos 13, 159-170. Oslo. ISSN 0024-4937. The Lueshe carbonatite is...I vol. % are typical. The carbonat;,ies ot the Lueshe alkal;ne complex are mainly s6vites with some alvikites...Berlin 12. Tyskland. The carbonatite complex of Lueshe like those of Monbadio, Bingo, Kirumba, Kibvy,...(Fig. I). Some of these carbonatites, particularly Lueshe and Bingo, are of economic interest on account |  | | 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 |  | | 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) | | 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...carbonatite b. carbonate-silicate veins c. quartz-mica formations d. quartz-veins e. greisens 5. Metamorphicor...cut most of the complex. h. Finally hydrothermal quartz-sulfideveins appear in the upper part of the diathreme |  | | 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) | | 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...deposits observed also at Araxa, Brazil, and at Lueshe, Congo. Pandaite and Associated Crandallite A series...deposit. This mineral, not previously found in the Congo, is known from Panda Hill, Tanzania and from Araxa...analysis has shown that these veinlets are composed of quartz and, in particular, of an aluminium phosphate containing |  | | Journal (issue) | | net NOVEMBER–DECEMBER 2022 Articles The Laohuan mine, Goncheng, Zhuang, Guangxi, China................. Wilson & T. P. Moore Reichenstein-Grieserntal Quartz Twins: Two Angles Named in a single Twin Law.....Type Mineralogy of the Democratic Republic of the Congo...................................................yellow pyromoprhite crystals, 9 cm, from the Laohuan mine, Gongcheng County, Guangxi, China. Federico Pezzotta... Hickox, Jr. Wally Mann Keith and Diane Brownlee Dr. Nikolas Golosow William B. (Bill) Wray Herb & Monika |  | | 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 |  | 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...crystals associated with hydrothermal dolomite, quartz and chlorite. Progressive enrichment of the deformed...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 |  | | Report (issue) | | synchysite, cordylite, ancylite, calcite, fluorite, quartz. Distribution: Many localities, most minor. Fine...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. |  | | 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) |  | | Catalog/List | | Italy. massive, green 2 variety ADAMITE: Ojuela Mine, Mapimi, Durango, Mexico. crystals ADAMITE,variety...Index, Washington, USA. crystals ALBITE: Jeffrey Mine, Asbestos, Quobcc, Canada. crystals ALBITE: St....good crystal sections AS ,'\BOVE ALGOOONITE:Calumot Mine, Michigan, USA. massive ALL'\NITE: . Quadeville...in feldspar /\LLEGHi'.NYITE:/\llcgheny County, North Carolina, USA, crudG crystals to massive ALLOPHANE:Juanita...1-:incrva .i'l Mine, Cavo-ln-Rock, Illinois, USA. good crystals ALT/1ITE: Hilltop Mine, Organ Mountain |  | | Report (issue) | | Russia); columbite, monazite, ancylite, barite, quartz, apatite (Ravalli Co., Montana, USA). Distribution:...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 |  | | Journal (article/letter/editorial) | | Uganda-Kenya border, and a western one along the Uganda-Congo border associated with the Western Rift system.... Three carbonatites from the eastern, north-south trending belt were sampled: Sukulu Hill, Tororo Hill...series, nepheline syenite, fenitized syenite and quartz syenite, and finally fenitized granite. In the...one of the satellite ring-dikes is not specified. North of these older, deepIy eroded complexes there is...1958). From west to east the complexes are Rangwa, North and South Ruri, Homa Hountain, Buru Hill and the |  | | 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...Meteoric weathering; Rare-earth elements; Republic of Congo 1. Introduction Among the chemical characteristics...large quantities of Fig. 1. Geological map of the Lueshe complex Žmodified after Maravic et al., 1989.. |  | | Journal (article/letter/editorial) | | rock type Brevik, Norway; nephelinesyenite Lueshe, Lake Kivu, Zaire; carbonatite Hybla, Ontario, Canada;...Panda Hill, Mbeya, Tanzania; carbonatite Woodcox mine, Hybla, Ontario; granitic pegmatite MacDonaldmine...Leushe, Lake Kivu, Zaire; carbonatite Fredricksvarn,NoMay; nepheline syenite Lueshe, Lake Kivu, Zaire; carbonatite...carbonatite Lueshe, Lake Kive, Zaire; carbonatite Jacupiranga,Sao Paulo, Brazil; carbonatite Araxe, Minas...=phlogopite; Pl :plagioclase; Pyx : pyroxene; Qtz : quartz; Srp : serpentine;Ttn : titanite; Zrn: arcon. |  | Melcher, F., Graupner, T., Sitnikova, M., Henjes-Kunst, F., Oberthür, T., Gäbler, H.-E, Bahr, A., Gerdes, A., Brätz, H., Rantitsch, G. (2009) Ein Herkunftsnachweis für Niob-Tantalerze am Beispiel afrikanischer Selten-Element Pegmatite. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 155. | Journal (article/letter/editorial) | | conflicts, especially in the Democratic Republic of the Congo, is widely discussed. In many African countries...Nationalpark in der Demokratischen Republik Kongo (DR Kongo; „Durban Process“). Die Studie basierte auf...machten sich Rebellengruppen in den Ostprovinzen der DR Kongo zu nutze. Der illegale Abbau und Handel von...trug so zur Fortsetzung bewaffneter Konflikte in der DR Kongo und in den Nachbarstaaten bei. Exportstatistiken...zumindest zwischen 2001 und 2004 Coltan aus den Kivu-Provinzen über benachbarte afrikanische Länder in |  | 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) | | In addition, veins with vugs infilled by druse quartz, carbonates and fluorite are also common. Distinct...pyrochlore generations and are present as inclusions in quartz and fluorite or as veinlets in fluoritized/silicified...set of faults oriented NE–SW that cut the Angola–Congo craton (Issa Filho et al., 1991). Different types...and goethite (Gth). d) Ankerite (Ank) replaced by quartz (Qtz) associated with barite (Brt). intrusion...infilled with large euhedral fluorite, barite and quartz crystals. The grain size in these druses may reach |  | 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 second generation pyrochlore, associated with quartz-carbonate-fluorite vein formation in the carbonatite...micrometres to a few tens of centimetres and contain quartz, baryte, calcite, ankerite and dolomite (Fig. 4c)...cutting across the carbonatite. (c) Stockwork-like quartz veinlets (qtz) cutting the carbonatite. (Fig....scattered anhedral grains, less than 0.5 mm across. Quartz, calcite, dolomite and ankerite are the dominant...veins and consist of euhedral crystals of dolomite, quartz, strontianite and fluorite which do not exceed a |  | | Journal (article/letter/editorial) | | hydrous silicates in the Kvaløya lamproite dyke, North Norway Kåre Kullerud & Dmitry Zozulya & Erling J...Bayan-Obo mine in Inner Mongolia, China. On the type locality, baotite occurs in hydrothermal quartz veins...Buryatia, Russia (Koneva et al. 2008), Lueshe, Democratic Republic of Congo (Wall et al. 1996), and Haast, New...been reported from a carbonatite in Lueshe (Democratic Republic of Congo)(Wall et al. 1996). Baotite from...shows a Fig. 1 Geological map of Kvaløya Island, North Norway, showing sampling localities. Modified from |  | | 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 |  | | Report (issue) | | ....................................... 2 World Mine Production .......................................Information Services Ltd., 2012). World Mine Production In 2011, world mine production of tantalum increased...total mine production in 2011; Brazil accounted for 20 percent; the Democratic Republic of the Congo [Congo...together accounted for 47 percent of the world’s mine production of tantalum. The locations of significant...southwestern Western Australia. The Greenbushes Mine, which is hosted by the Archean Greenbushes pegmatite |  | | Journal (article/letter/editorial) | | gneisses. Localized occurrences of pegmatitic veins, quartz veins and narrow dolerite dykes are common. Feni...carbonatites elsewhere in Africa (e.g. Lueshe, Democratic Republic of the Congo), the Buru carbonatite centre...weathered crusts. It also has been reported from the Lueshe carbonatite complex, where it was observed to be...and encouragement given by Prof. A.E. Fallick and Dr A. Boyce at the Scottish Universities Research and... LANTHANIDE MINERALIZATION, BURU CARBONATITE Lueshe, Kivu/NE Zaõ¨re: Petrographic and geochemical studies |  | | Journal (article/letter/editorial) | | t h e East African Rift system, the 1966) a n d Lueshe (a.o. Maravic a n d Morteani, carbonatic bodies...alkalic complexes emplaced a n d 110 k m to the north-west), on t h e other side of between t h e n o...are k n o w n on b o t h t h e Rift. sides of Lake Kivu. The existence of t h e Kibuye Several types of...the n e i g h b o u r h o o d of Kibuye a n d lake Kivu by B. Egoroff d u r i n g the '50s a n d they have...c a m b r i a n formations (see The Kawizi body (Kivu) h a s b e e n described a n d below) t h r o u |
|
