 | | 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) |  | 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 |  | | 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 |  | | 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) | | border between Zambia and the Democratic Republic of Congo (DRC), is the largest sediment-hosted stratiform...Katanga Supergroup in the Democratic Republic of Congo, compiled after Cailteux et al. (2005) and Batumike... Three such phases were identified at the Nkana mine in Zambia (Brems et al. 2009). They are characterized...the Lower Orebody and Upper Orebody at the Nchanga mine in Zambia (McGowan et al. 2003). The Cu–Co mineralization...Tombolo deposits; Selley et al. 2005) to upper amphibolite facies (Lumwana and Kalumbila deposits in the |  | | Journal (article/letter/editorial) | | 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...where dynamothermal metamorphism reaches upper amphibolite or granulite facies, at which point many distinguishing...related to alkaline silicate gneiss, blue–green amphibolite (preserved fenitisation zone), or pyroxenite...Greenland carbonatites (Bell and Simonetti 2010) North American carbonatites (Bell and Simonetti 2010)...several carbonatites metamorphosed to upper amphibolite facies in the British Columbia Alkaline province |  | | 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 |  | 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) |  | 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) | | with the granulites (Fig. 1B). It consists of amphibolite-grade gneiss-migmatites. The Mesoproterozoic...main facies, aegirine nepheline syenites to the north and biotite nepheline syenites to the south, with...Francisco–Congo region around 1.0–0.9 Ga (Brito-Neves et al., 1999). In the western Congo craton, a continuation...tectonique du bassin protérozoïque supérieur de Comba (Congo): Stratigraphie séquentielle du Supergroupe Ouest-Congolien...ages of the Lueshe, Kirumba and Numbi igneous complexes (Kivu, Democratic Republic of Congo) and the break-up |  | 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) | | zone extends approximately 400 km in length from north to south (Fig. 1). It is confined to the Hardagasky...regional metamorphic events (epidoteamphibolite and amphibolite facies) reworked the basement rocks, and there...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...carbonatite intrusion is elongated from south to north-west and is in contact with the metamorphic rocks |  | 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 |  | | 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...Hadoto, 1990). G4 granite intrude Buganda Toro amphibolite facies schists with quartzite bands. Kibaran |  | | Journal (article/letter/editorial) | | African Orogen (EAO) which encompasses the ANS in the north and the Mozambique Belt in the south (Fig. 1). The...reverse and strike-slip faulting farther to the north. Structural history in the Eastern Desert of Egypt...melting of lower crustal mafic material (e. g., amphibolite), (3) partial melting of lower crustal materials...equilibrate with garnet-bearing rocks. Melting of amphibolite results in granitic magmas that are too low in...shallow-level crustal magma chamber. Acknowledgement I thank Dr. F. H. Mohamed for his assistance during the XRF |  | | Journal (article/letter/editorial) | | fenites are obtainable, one, at Curral do Touril north of Monchique village, shows features similar to...cordierite, andalusite, corundum and biotite. (ii) Lueshe, Congo This carbonatite complex intrudes amphibolitefacies...association occur here, intruding folded pelites of amphibolite grade. Sturt & Ramsay concluded that the extensive...Monchique are great compared with Magnet Cove and Lueshe. (c) Fenitisation around carbonatite complexes...has been induced in the known examples from the Congo, U.S.A., and Norway. Carbonatite intruding granitic |  | | Journal (article/letter/editorial) | | continues the series of 21 published triennially by Dr. L. J. Spencer between 1897 and 1958. Such lists...MHHepa~orM~ecKoro O6~eCTBa; the eorttinuation of Dr. Speneer's series seems desirable since it differs...fumarole on Cerro Pululus, north-west Argentina, appear to be F%As20 n. Named after Dr. V. Angelelli, Director...a fissure mineral at Lhngban, Sweden. Named after Dr. Ragnar Blix. [M.A. 14-416.] Bobkowit. Gerlnan transliteration...List), named by J. de Lapparent (1927) in honour of Dr. Johann Bahm of Berlin; corrected in ~r Jahrb. Min |  | | 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) | | isotope compositions of fenites derived from amphibolite and granite plot in the enriched quadrant of...Simonetti & Bell, 1994; Spitskop: Harmer, 1992; Lueshe: Kramm et al., 1997). The petrology, the geochemistry...plains (samples OL16) and gullies (samples OL18) north of the 1998 KRAMM AND SINDERN FENITES FROM OLDOINYO... In contrast, the four samples of fenitized amphibolite are homogeneous and more coarse grained compared...differ considerably between granite gneisses and amphibolite wall rocks. Likewise, a larger isotopic variance |  | | 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 |  | | Report (chapter) | | region. Orogenesis in the same time frame farther north is recorded by the Kibaran and Irumide Belts, which...culminating at 575-505 Ma in the Mozambique and West Congo-Kaoko-Gariep-Saldania Belts along the present eastem...basement are blanketed by Phanerozoic deposits in the Congo Basin in Central Africa and in the Kalahari Desert...some insight into the basement geology beneath the Congo Basin (e.g. Daly et al. 1992), but the Precambrian...Archaean crust is also exposed on the flanks of the Congo Basin, including the Angola-Kasai Craton, parts |  | Conceicao, H., de Lourdes da Silva Rosa, M., Moura, C. A.V., Macambira, M. J. B., Galarza, M. A., Rios, D. C., Marinho, M. M., Menezes, R. C. L., Cunha, M. P. (2009) PETROLOGY OF THE NEOPROTEROZOIC ITARANTIM NEPHELINE SYENITE BATHOLITH, SAO FRANCISCO CRATON, BAHIA, BRAZIL. The Canadian Mineralogist, 47 (6) 1527-1550 doi:10.3749/canmin.47.6.1527 | Journal (article/letter/editorial) | | two phases of deformation. They host lenses of amphibolite, marble and remains of mafic– ultramafic complexes...tholeiitic rocks in the SBAP. In the western part of the Congo Craton, where a continuation of the Araçuaí belt...ages of the Lueshe, Kirumba and Numbi igneous complexes (Kivu, Democratic Republic of Congo) and the break-up... C.M. & Pinto, C.P. (2001): The Araçuaí – West-Congo Orogen in Brazil: an overview of a confined orogen...(eastern Brazil) and correlation with the West Congo Belt (central Africa). Simpósio 40 anos de Geocronologia |  | | Journal (article/letter/editorial) | | Deformation of both rock units took place under amphibolite-facies metamorphic conditions. Fluid inclusions...and garnet-bearing quartzites. Small layers of amphibolite are also present, intercalated with the meta-sediments...xenoliths consist of metagabbro, amphibolite and partly migmatised amphibolite, which have basalt to basaltic...migmatisation and formation of ductile fabrics in the amphibolite lenses. This migmatitic texture is absent in...and S3 normal fault planes dipping gently to the north and south planes (NNF, foliation of northern normal |  | | Journal (article/letter/editorial) | | carbonatite of Western Tanganyika and the Lueshe carbonatite, Congo. A small plug of albitite is found associated...It is bounded in general by Wadies Samra in the north-eastern portion and Tarr in the south-west. The...IM~mr,o,ph,e) M~,. suacm,ol to mid-amphibolite facies towards the north-east near the Samra albitite. About...University of Glasgow, where the kind assistance of Dr. D. Bowes, other colleagues and the technical staff...gratefully acknowledged. The author is most grateful to Dr. B. Leake for preparing the norm and formula calculations |  | | Journal (article/letter/editorial) | | Archean cratons, such as the Kalahari craton, the Congo craton, and the West African craton (Fig. 1, inset)...the east and the Archean continental crust of the Congo craton in the south. The region of the Saharan metacraton...African Orogen (EAO) which encompasses the ANS in the north and the Mozambique Belt in the south (Fig. 2). The...extends from Jordan and southern Israel in the north to Eritrea in the south and from Egypt in the west... Sultan et al. 1986) are marked, except in the north Eastern Desert and Sinai, where their occurrence |  | | 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 |  | | 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 |
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