 | | 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...particle 273-283 Distribution of rare earths in lunar zircon 382-385 Aiolosite, a new sulfate isotypic to apatite...MINERAL HS XV, 2009 Themanummer : "Les minéraux de la Mine des Farges, Ussel (Corrèze), France" - 84 pp. |  | | 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) | | 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...niobiumis distributedin pyrochlore,pyroxene, and zircon. Strontium is also characteristic of these carbonatites...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 |  | | 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...alkaline complexesdeficientin columbiumand calcite. Zircon is also the main ore-mineralof metallogenetic granites...diathreme. Internal StructureoI ColumbiumCarbonatites.-Lueshe: 1. core of busorite (canefinite syenite) 2. intermediatering |  | | 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 |  | 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) | | associated heavy minerals (apatite ± magnetite ± zircon ± baddeleyite) precipitated early in the magmatic...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 |  | | Report (issue) | | biotite, apatite, “hornblende”, titanite, muscovite, zircon, xenotime (Vishnevy Mountains, Russia); columbite...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) | | 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) | | Of the 322 entries*, the Democratic Republic of Congo (formerly Zaire) comes out on top with 88; Namibia...indebted to Dr.Joseph Mandarino of Toronto, Canada, and Dr. Werner Krause of Hiirth, Germany, who supplied dates...briartite shares with the Democratic Republic of Congo and Namibia, and both djerfisherite and niningerite...Localities (1) Kanemite: Kanem region, Lake Chad. CONGO(3) People (2) Fornacite: Lucien Louis Fourneau (18671930)...(18671930), colonial governor, French Congo. Plunchkite: Mr. PlanchC, French explorer. Localities (1) |  | | 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) |  | | Journal (article/letter/editorial) | | system (Africa) and the Grenvillian orogenic belt (North America). The Kibaran belt is the oldest Mesoproterozoic...rock, mineral isotopic data and multigrain U-Pb zircon dating established that the Kibaran orogenic system...evolution of the Grenvillian orogenic cycle of North America (e.g. Mc Lelland and Chiarenzelli, 1990;...Ga; Kampunzu et al., 1998a) yielded SHRIMP U-Pb zircon ages indicating a peak of magmatic activity between...within the margin of errors, similar to the U-Pb zircon age of 1393+22 Ma for a remnant of Mesoproterozoic |  | | 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....SID:RIT~: St. Hilairo, Quebec, Canada, crystals ALBITE, ZIRCON: St. Hilaire, Quebec, Canada. crystals ,;LEXANDRITE:Takawaja...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 |  | Geisler, T., Berndt, J., Meyer, H.-W., Pollok, K., Putnis, A. (2004) Low-temperature aqueous alteration of crystalline pyrochlore: correspondence between nature and experiment. Mineralogical Magazine, 68 (6) 905-922 doi:10.1180/0026461046860230 | Journal (article/letter/editorial) | | has been discussed in great detail by considering zircon as an example for which numerous mineralogical...the physicochemical conditions. To our knowledge, zircon is the sole mineral so far for which it has recently...experimental study has surprisingly shown that 238Pu-doped zircon behaved fundamentally differently in an acidic...hydrothermal solution when compared to natural zircon with a low actinide concentration but with a similar...Nb; Hogarth, 1977) from Lueshe near Lake Kivu of the Democratic Republic of Congo obtained from the Mineralogical |  | | 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,...7), ceriopyrochlore (Lueshe specimen BM 1966/232 – rim) and kalipyrochlore (Lueshe specimen BM 1966/232 |  | 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...(Pcl3) and type IV pyrochlores (Pcl4) hosted in zircon crystals (Zrn). The association also include restites...quartz, strontianite [SrCO3] and hematite. Finally, zircon crystals may overgrow all the pyrochlore generations...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 |  | | 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 |  | 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) | | magnetite are common accessory minerals; phlogopite and zircon are less common. Apatite occurs as euhedral millimetresized...~47% Fe 2+ in secondary pyrochlore from the Lueshe mine in Congo. However, the total amount of iron, Fet...hydrothermal alteration were described at Lueshe mine in Congo by Nasraoui et al. (1999) and Nasraoui and...Uganda (Williams et al., 1997), the Lueshe carbonatite in Congo (Nasraoui et al., 1999; Nasraoui and...position of the pyrochlore in the lateritic profile. At Lueshe, moreover, Ba- and Srbearing pyrochlore is found |  | 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) |  | Villeneuve, M., Gärtner, A., Kalikone, C., Wazi, N., Hofmann, M., Linnemann, U. (2019) U-Pb ages and provenance of detrital zircon from metasedimentary rocks of the Nya-Ngezie and Bugarama groups (D.R. Congo): A key for the evolution of the Mesoproterozoic Kibaran-Burundian Orogen in Central Africa. Precambrian Research, 328. 81-98 doi:10.1016/j.precamres.2019.04.003 | Journal (article/letter/editorial) | | detrital zircon from metasedimentary rocks of the Nya-Ngezie and Bugarama groups (D.R. Congo): A key for...Dresden, Germany c Université officielle du Sud Kivu, Bukavu, Congo b A R T I C LE I N FO A B S T R A C T ...Belt Central Africa U-Pb geochronology Detrital zircon Lithostratigraphic correlations Geodynamic models...still under debate. Modern studies distinguish the north-eastern Karagwe-Angkole Belt (KAB) and the southern...distinction of the KAB and the poorly studied northwestern Kivu Belt (KVB) has to be suggested. Latest researches |  | | Journal (article/letter/editorial) | | border between Zambia and the Democratic Republic of Congo (DRC), is the largest sediment-hosted stratiform...erosion of the Nchanga Granite at 883± 10 Ma (U–Pb on zircon; Armstrong et al. 2005) and is divided into four...information for these rocks is limited. Recent detrital zircon studies suggest an age between 840 and 790 Ma years...part of the Dipeta Subgroup (Fig. 2) yield maximum zircon U–Pb SHRIMP ages of 765±5 Ma in northwestern Zambia...Katanga Supergroup in the Democratic Republic of Congo, compiled after Cailteux et al. (2005) and Batumike |  | | Journal (article/letter/editorial) | | hydrous silicates in the Kvaløya lamproite dyke, North Norway Kåre Kullerud & Dmitry Zozulya & Erling J...The mineral was first described from the Bayan-Obo mine in Inner Mongolia, China. On the type locality,...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 |  | ROSA, M, CONCEICAO, H, MACAMBIRA, M, GALARZA, M, CUNHA, M, MENEZES, R, MARINHO, M, FILHO, B, RIOS, D (2007) Neoproterozoic anorogenic magmatism in the Southern Bahia Alkaline Province of NE Brazil: U–Pb and Pb–Pb ages of the blue sodalite syenites. Lithos, 97 (1) 88-97 doi:10.1016/j.lithos.2006.12.011 | Journal (article/letter/editorial) | | Rio Pardo (714 ± 8) and Pb–Pb evaporation ages of zircon from Floresta Azul (696 ± 3 Ma) and Itarantim (722...by and in sharp contact with nepheline syenite. Zircon crystals up to 3 cm long are found in this facies...titanite, apatite, calcite, magnetite and sometimes zircon. The distribution and grain size of sodalite syenites...main facies, aegirine nepheline syenites to the north and biotite nepheline syenites to the south, with...present, the latter including nephelinolite and zircon sodalite nepheline syenite. The contact with the |  | Prokopyev, Ilya R., Doroshkevich, Anna G., Sergeev, Sergey A., Ernst, Richard E., Ponomarev, Jean D., Redina, Anna A., Chebotarev, Dmitry A., Nikolenko, Anna M., Dultsev, Vladislav F., Moroz, Tatyana N., Minakov, Alexey V. (2019) Petrography, mineralogy and SIMS U-Pb geochronology of 1.9–1.8 Ga carbonatites and associated alkaline rocks of the Central-Aldan magnesiocarbonatite province (South Yakutia, Russia) Mineralogy and Petrology, 113 (3) 329-352 doi:10.1007/s00710-019-00661-3 | Journal (article/letter/editorial) | | dolomite, K-feldspar, phlogopite and accessory zircon, titanite, baddeleyite and thorite. The hydrothermal-metasomatic...Seligdar magnesiocarbonatites is 1880 ± 13 Ma (zircon U-Pb data, Prokopyev et al. 2017). The Paleoproterozoic...zone extends approximately 400 km in length from north to south (Fig. 1). It is confined to the Hardagasky...gneisses host the Muostalaah occurrence. Most of the territory is covered by Quaternary sediments: pebble, sand...the Timpton river (Fig. 4), approximately 30 km north-east of Neryungri town in Yakutia. The ore-body |  | 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) | | 1007/s00710-015-0418-y ORIGINAL PAPER Zirconolite, zircon and monazite-(Ce) U-Th-Pb age constraints on the...suitable for U-Th-Pb age determinations, such as zircon, perovskite, monazite-(Ce), baddeleyite, zirconolite...In this study we determine the U-Th-Pb ages of zircon, zirconolite and monazite-(Ce) from the Cummins...mineral in the Cummins Range Carbonatite Complex. A zircon U-Pb TIMS age of 1012 ± 3 Ma for the carbonatites...magmatism, including carbonatites, in the Kimberley and North Australian Cratons over the Nuna–Rodinia supercontinent |  | | Journal (article/letter/editorial) | | grade metamorphic events, the U-Pb age dates on zircon and baddeleyite corroborate the original data and...from Woolley and Bailey (2012) and U–Pb dates on zircon and baddeleyite from Rukhlov and Bell (2010). Age...13.5 21.5 27.8 Okorusu 8.2 0.2 2.7 2.7 32.7 4.9 Lueshe 4.4 2.8 64.6 0.8 17.9 0.8 Sarfartôq 78.5 1.0 1...Greenland carbonatites (Bell and Simonetti 2010) North American carbonatites (Bell and Simonetti 2010)...in millimetres (d) Pyrochlore concentrate, Niobec Mine, Quebec, Canada; scale in millimetres. forming |
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