 | | 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...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) | | 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) | | leptynite, quartzite and granulite in this area. C0,-bearing fluid inclusions occur in quartzite, leptynite...inclusions are also seen. The CO, inclusions in quartzite yield moderate to low densities (0.86-0.88g/cm3)...temperature-pressure condition of fluid inclusions in quartzite. Reference Dasgupta, S. (1995) Pressure-temperature...system (Africa) and the Grenvillian orogenic belt (North America). The Kibaran belt is the oldest Mesoproterozoic...evolution of the Grenvillian orogenic cycle of North America (e.g. Mc Lelland and Chiarenzelli, 1990; |  | | 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) | | 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...facies schists with quartzite bands. Kibaran sediments (conglomerate, quartzite, pelites) are clearly |  | 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) | | rocks of the Nya-Ngezie and Bugarama groups (D.R. Congo): A key for the evolution of the Mesoproterozoic...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 ...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...and Bugarama groups. Both of them occur along the Congo, Rwanda and Burundi borders and have frequently |  | | 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 |  | | Catalog/List | | Whcal Basset, Carnkie, Cornwall. 5x3.8x2.6cm. A quartzite and rock matrix has a botryoidal bed or small...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...13ORNITE, Tincrort mine, Redruth, Cornwall. 8x6x4.6cm. I\ sandy coloured 6. quartzite matrix has many black...David New label. £275. 7. IJOURNONITE, Herodsfool mine, Lanreath, Cornwall. 6.5x5x3.Jcm. A quartz matrix |  | | Book | | Buttgenbach H. (1 947) Les Mineraux de Belgique et du Congo Beige. 573 p. Paris: Ed. Dunod. Cesbron, F. (1985)...the government of the Democratic Republic of the Congo introduced a new admin istrative subdivision for...Haut-Loma mi Province. What formerly was called the Bas-Congo Province is known today by the name of Central Kongo...abbreviated (B = Belgium; D.R. Congo = Democratic Republic of the Congo; F = France). 4. The biographical...dumontite). At this place, the country rock is a quartzite. In his publication, Dumont (1848) often mentions |  | | Book (volume) | | years. The Precambrian of the R epublic of the Congo and of the tvvo small adjoining states, Rwanda and...during brief field trips under the expert guidance of Dr. H ENRI BESAIRIE. The similarity between the metamorphosed...em·i Besairie . . 133 The P RECA1\1BRIAN OF THE CONGO, RWANDA, AND BURUNDI by L. Cahen and J . Lepersonne... the 111onntain bolt of the H in1alayas in the north, is called the Extrapeninsular region. The I ndo-...Vn1clh)~a Range, north of the Narbada, and its eastward continuation in the same direction north of the Son |  | | Journal (article/letter/editorial) | | that I worked at one of the Copperbeltminesas a mine geologistfor over two years, had the opportunityof...considerhis ten pointsindividuallyas they apply to the mine where I worked, Mufulira, which is one of the largestof...feet, and over this entire length it occursin a quartzite immediatelyunderlying an excellent marker horizon...iron crystallizingin magnetitealso at Aln5 and Lueshe, Bukusu, Sukulu, Oldonyo Dili, Hanang, Kwaraa |  | Guowu, Li, Guangming, Yang, Fude, Lu, Ming, Xiong, Xiangkun, Ge, Baoming, Pan, de Fourestier, Jeffrey (2016) Fluorcalciopyrochlore, A New Mineral Species From Bayan Obo, Inner Mongolia, P.R. China. The Canadian Mineralogist, 54 (5) 1285-1291 doi:10.3749/canmin.1500042 | Journal (article/letter/editorial) | | dolomite that is part of a 2000 m thick sequence of quartzite, carbonate rock, and shale. These sedimentary...sequence deposited in easttrending grabens along the north edge of the Archean crystalline Sino-Korean craton...Williams, CNMNC Chairman, for his help and advice, and Dr. Adam Pieczka for his advice. This study was supported...(2000) Pyrochlores from the Lueshe carbonatite complex (Democratic Republic of Congo): A geochemical record |  | | Journal (article/letter/editorial) | | sandstone and a shale sequence with intercalations of quartzite and concordant dolerite dikes. The core of the...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...Nasraoui, M., Pyrochlore from weathered carbonatite at Lueshe, Zaire, Mineral. Mag., 1996, vol. 60, pp. 731–750 |  | | 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...2x3 £25 Ampibole 1140 ERYTHRITE Sl-a1tterud Cobalt Mine. Vikersund Norway 970 MAGNESIOHASTINGSITE Langban |  | | 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 |  | | 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 |  | | 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 |  | | Book (edition) | | co-author, teacher, mentor, colleague and friend, Dr. Joseph A. Mandarino. -Malcolm E. Back Fleischer's...they are: Dr. Peter Bayliss, Dr. Ernst A.J. Burke, Dr. Anton and hakhmouradian,Robert Gault, Dr. Julian...Låszl6 Horvåth, Dr. Uwe Kolitsch, Locock,Gaspare Malet.to,Dr. Roger Mitchell, Renato Pagano. Dr. Ole Petersen...Robert Ramik,Andy Roberts, hallit, Dr. Chris Stanley,Tony Steede and Dr. ThomasWitzke. upport and encouragementof...Abernathyitc, K[(UO 2 )(AsO,)](HP) 3, tet., Fumerole No. 2 mine, Temple Mountain. on the southeast flank of the |  | | Report (issue) | | for foreign countries, if a given name refers to a mine or deposit, a nearby location or administrative...names may be used to refer to a single deposit or mine. For large deposits or mineralized areas, a 3 single...is meant to identify the area, deposit, district, mine, or occurrence to which the geologic, economic,...Detterman, R.L., 1989, Triassic phosphate deposits, north-eastern Alaska, USA, in Notholt, A.J.G., Sheldon... M.P., 1993, Digital metallogenic data set for North America and South America: U.S. Geological Survey |  | | 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 |  | | Book | | Figures Springer-Verlag Berlin Heidelberg GmbH Prof. Dr. PETER MöLLER Hahn-Meitner-Institut Berlin GmbH Bereich...Reaktor Postfach 390128, D-1000 Berlin 30 FRG Prof. Dr. PETR CERNY Department of Earth Science University...Manitoba, Winnipeg Manitoba R3T 2N2 Canada Prof. Dr. FRANCIS SAUPE Centre de Recherehes Petrographiques...1950. The seeond is still oeeasionally used in North Ameriea. Thus, the entire suite of elements dealt...partial patterns of lanthanite(Ce) from the Britannia Mine, Wales, UK (Bevins et al. 1985) and oflanthanite-(N |  | Starikova, Anastasia E., Bazarova, Ekaterina P., Savel’eva, Valentina B., Sklyarov, Eugene V., Khromova, Elena A., Kanakin, Sergei V. (2019) Pyrochlore-Group Minerals in the Granite-Hosted Katugin Rare-Metal Deposit, Transbaikalia, Russia. Minerals, 9 (8) 490 doi:10.3390/min9080490 | Journal (article/letter/editorial) | | mafic schists, quartzite and magnetite mafic schists, quartzite and magnetite quartzite); 20 = Kalar sequence...sequence (garnet-biotite plagiogneiss quartzite); 20 = Kalar sequence (garnet-biotite plagiogneiss with...clac-silicate rocks, quartzite, and magnetite mafic granulite, clac-silicate rocks, quartzite, and magnetite...magnetite quartzite; 21 = metamorphic igneous quartzite; 21 = metamorphic and igneous complexes of the Selenga-Stanovik... Pyrochlores from the Lueshe carbonatite complex (Democratic Republic of Congo): A geochemical record |  | | Journal (volume) | | Minerals Diamonds in Basutoland Carbonatite in Kivu, Belgian Congo Forthcoming Increase in Price of this Bulletin...CORRESPONDENCE The Itiaso Series of Western Tanganyika. From Dr. R. B. McConnell and C. B. Bisset 249 , 497 PERSONALIA...COLONIAL OFFICE PUBLICATION Geology of the Colony of North Borneo BY MAX REINHARD , PH.D. , AND EDUARD WENK...Special Reference to Work in the Colonies " , by Dr. F. Dixey 85 Colonial Mineral Production 85 Mineral...London and the field geologists in a Colonial territory. The investigation started in the Photo geological |  | | Journal (article/letter/editorial) | | % from tin slag refining and 10 % from secondary mine concentrates. Due to rapid industrialisation and...Canada account for about 92 and 7 % of Nb world mine production, respectively. Since the bulk of the...the start-up time for new operations. The Kenticha mine (Ethiopia) is a past producer that may re-enter...studies on new developments) are required in any mine as price levels vary for each deposit and are dependent...concentrate buyers. In western countries, a typical mine may take more than 3 years to put into production |
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