 | | 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) | | been found and analysed in carbonatites from the Lueshe, Newania, Kangankunde, and Chipman Lake complexes...carbonatitic liquid generated by partial melting of phlogopite-carbonate peridotite in the mantle at pressures...siderite. Material analysed and results Lueshe, Zaire. Lueshe is a complex of carbonarites, including...carbonates from Lueshe, Newanla, Kangankunde and Chipman Lake c a r b o n a t i t e s Lueshe ..............no. 10) gave an analysis of a carbonatite from Lueshe described as "Rauhaugite a 90% de magnesite"; unfortunately |  | | 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...(nepheline–clinopyroxene) or melilitoid (olivine– melilitite–phlogopite–clinopyroxene) suites. Some carbonatites have...units presents in carbonatites e.g. the Loolekop mine at Phalaborwa (Fig. 250 of Woolley, 2001), Catalão-I |  | 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) | | rutile, phlogopite and, to a much lesser extent, amphibole. When the passive margin of North America...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 |  | | 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) | | 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...Kfs:potassiumfeldspar; Mag:magnetite; Ol :olivine; Phl =phlogopite; Pl :plagioclase; Pyx : pyroxene; Qtz : quartz; |  | | 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 |  | | 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...is enveloped successively by magnetiteapstite-phlogopite-carbonate rock, a mixed rock zone with feldspathoidal...layered light and dark grey sdvite soda-pyroxene-phlogopite sbvite 8.5 12.3 m.g. buff s&&e e.g. buff magnetite-s&&e...one of the satellite ring-dikes is not specified. North of these older, deepIy eroded complexes there is |  | 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) | | deposit consists of two plug-shaped orebodies named Mine II and East Area, respectively emplaced in carbonatite...dikes near the center of the complex (East Area and Mine II orebodies). The direct relationship between phoscorite-series...(our data) while mining focused on the Boa Vista mine in Catalão II. Recent modeling of the fresh rock...Area orebody and 7.2 Mt at 1.23 wt.% Nb2O5 for the Mine II, adding up to a total reserve of approximately...I pyrochlore chemical composition with that of Lueshe (Nasraoui and Bilal, 2000), Oka (Gold et al., 1986; |  | | Journal (article/letter/editorial) | | typical development is a mica zone 1-10 cm wide but phlogopite is also developed in a more pervasive manner...by Verwoerd, 1966) and metasedimentary schists (Lueshe in Zaire (Meyer & Bethune, 1958)) but the mineralogy...metasomatism have been held to change diopside into phlogopite and calcite, thereby generating carbonatite (e...C. to spend a year at the University of Toronto. Dr C. J. Sullivan and Kennco Explorations Canada Ltd...Bethune, P. de. 1958. La carbonatite Lueshe (Kivu). Bull. Congo Beige Serv. geol. 8, fasc 5. Morey, G |  | | Journal (article/letter/editorial) | | hydrous silicates in the Kvaløya lamproite dyke, North Norway Kåre Kullerud & Dmitry Zozulya & Erling J...fluoro-potassic-magnesio-arfvedsonite, fluoro-phlogopite, Editorial handling: G. Hoinkes K. Kullerud (*)...a range of 146 high-F minerals, including phlogopite (up to 4.6 wt%F; Kullerud et al. 2011), fluo...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 |  | | 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 |  | Zozulya, D. R., Savchenko, E. E., Kullerud, K., Ravna, E. K., Lyalina, L. M. (2010) Unique accessory Ti-Ba-P mineralization in the Kvalöya ultrapotassic dike, Northern Norway. Geology of Ore Deposits, 52 (8) 843-851 doi:10.1134/s1075701510080167 | Journal (article/letter/editorial) | | Ga in age are 0.1–1.0 m thick and consist of phlogopite phenocrysts in a fine grained groundmass of...9.2–10.7 wt % Al2O3 and 2.1–2.6 wt % TiO2 in phlogopite) and its bulk chemical composition (K/Na = 2...porphyritic, with phlogopite phenoc rysts 1–5 mm in size (up to 5 vol %). Phlogopite is Corresponding...9.2– 10.7 wt % Al2O3 and 2.1–2.6 wt % TiO2 in phlogopite (Table 1)) and the bulk chemical composition...arfvedsonite Orthoclase Kmagnesio arfvedsonite Phlogopite 65.22 0.00 16.64 57.07 2.28 0.08 63.97 0.00 |  | 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 magnetite are common accessory minerals; phlogopite and zircon are less common. Apatite occurs as...~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 |  | 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...pyrochlore, baddeleyite, pyrite, chalcopyrite and phlogopite. A positive correlation is observed between the...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 |  | | Journal (article/letter/editorial) | | groundmass in association with olivine, zoned spinel, phlogopite, carbonates (dolomite, calcite, magnesite), apatite... minerals; Srp–serpentine; Dol–dolomite; Phl–phlogopite; Mgt–zoned spinel; Ol–olivine; Tfp–tetraferriphlogopite...not typical of olivine of this generation. Rare phlogopite phenocrysts (2–5 vol.%) form round or irregular...newly formed phlogopite ± oikititic magnetite and rimmed by groundmass mica (phlogopite and/or tetraferriphlogopite)...due to macrocrystal–phenocrystal olivine and phlogopite (Fig. 1). Olivine (70–75 vol.%) occurs as rounded |  | | Journal (article/letter/editorial) | | Scotia' Aumento, F. and lriedlander, C. Zeolites from North Mountains' KIMBERLITE-CARBONATITESYMPOSIUM(H'v...partial 4. Bailey, D. K. Potash feldspar and phlogopite as indices pressure of COr in carbonatite and...columbite and the fersmite from the Lueshe carbonatite deposit (Republic of Congo). 15. Quon, S. H. and Heinrich...Y. H. and Lechance, G. R. On heterogeneity of phlogopite, feldspar and euxenite. 17' Roy, Rustum Application |  | 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) | | fluorapatite, magnetite, ilmenite, dolomite, K-feldspar, phlogopite and accessory zircon, titanite, baddeleyite and...zone extends approximately 400 km in length from north to south (Fig. 1). It is confined to the Hardagasky...the two metasomatized zones of finites and a phlogopite rim. The morphology of the Ust-Chulman ore body...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 |  | | Journal (article/letter/editorial) | | REE- fluorocarbonates, pyrochlore, fluorite, and phlogopite of a dolomitic carbonatite’ was reported at the...one of the silicates, forsterite, diopside, or phlogopite’. According to Krasnova et al. (2004), most of...sodic pyroxene; nepheline, calcite and biotite/phlogopite may also be present and typical accessories are...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...microcline), and in some cases may contain low-alumina phlogopite or biotite. Potassic fenites most commonly develop |  | 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) | | a Rb-Sr mineral isochron based on an apatite-phlogopite pair that produced an age of 905 ± 2 Ma (Sun...age of 854 ± 57 Ma (Andrew 1990),K-Ar dating of phlogopite from the carbonatite that produced an age of...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...t i c a l z o n e d st o c k i n w h i c h a phlogopite-diopside clinopyroxenite was intruded by calcite |  | | Journal (article/letter/editorial) | | potassic-ferri-katophorite), Alpoor pyroxene, phlogopite (Ti-rich, Al-poor), pseudomorphed leucite, spinel...mineralogy has been classified as a pseudoleucite-phlogopite-amphibole-lamproite. We report the presence of...Lamproites contain typomorphic minerals such as: phlogopite (alumina poor phenocrysts, tetraferriphlogopite...et al., 2013 and Gurmeet Kaur et al., 2018). Phlogopite, a minor groundmass phase, is typically tetraferriphlogopite...product of groundmass amphibole, pyroxene and phlogopite. Aggregates of quartz are common in pseudomorphed |  | | Journal (article/letter/editorial) | | of the central African mega-unit, made up of the Congo, Kasai and Angolan cratons (Goodwin, 1996). The...dolomite and ankerite. Apatite, magnetite and phlogopite are common accessory minerals and pyrochlore...mass or concentrated in millimetre-scale bands. Phlogopite is present as subhedral tabular crystals up to...values close to 0 wt.% have also been found in the Lueshe carbonatites (Nasraoui and Bilal, 2000). Betafite...particular Dr C.T. Williams for the assistance received at the Natural History Museum in London. Dr Xavier |  | 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...contain variable amounts of apatite, magnetite, phlogopite, pyrochlore-group minerals and rarely forsteritic...Nb-perovskite. In some cases, calcite ocelli, phlogopite, rare alabandine and primary barite were recognized...limit). However, strong Ba-enrichment occurs in phlogopite from the Kaiserstuhl carbonatites (up to about...Phoscorites and SC carbonatites from mantle to mine: the key example of the Kola Alkaline Province 10:293-340 |  | | Journal (article/letter/editorial) | | italics; book reviews are placed at the end. Acid-mine drainage (AMD), relationships of soluble, suspended...REE transport as evidence of metasomatism in the North Q6roq centre, South Greenland, 207 Apatites, carbonates...silicate of the lawsonite structure type, from Woods mine, New South Wales, 369; solid solution and composi-...mineral of the lawsonite structure type, from Woods mine, New South Wales, Australia, 369 BARKOV.A., 973...chemistry, 415 Carbonatite, exhibiting pyrochlore at Lueshe, Zaire, 731 ; occurrence of niobian zirconolite |  | Rampilova, Maria, Doroshkevich, Anna, Viladkar, Shrinivas, Zubakova, Elizaveta (2021) Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India. Minerals, 11 (4) 355 doi:10.3390/min11040355 | Journal (article/letter/editorial) | | minerals in dolomite carbonatite are fluorapatite, phlogopite (with a kinoshitalite component), amphibole and...such banding sodic amphibole, sodic pyroxene, phlogopite, apatite, magnetite and pyrochlore are common...the presence of silicate minerals (for example, phlogopite, aegirine and Na-amphibole) along with magnetite...crystal margins or along the cleavage planes. Some phlogopite and amphibole grains are altered to chlorite...dolomite (Dol); (c) association calcite apatite phlogopite (Phl), pyrochlore (Pcl) and dolomite (Dol)view) |
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