 | | 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...diathreme. Internal StructureoI ColumbiumCarbonatites.-Lueshe: 1. core of busorite (canefinite syenite) 2. intermediatering...camptonite,nephelinite,foyaite, phonolite,ijolite, trachyte, aln6ite, dolerite, albite-calcite pegmatite 10 |  | | 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...zone, accompanied by dikes of carbonatite and trachyte. The carbon and oxygen isotopic compositions measured...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 |  | | 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) | | type in the Dicker Willem carbonatite complex is trachyte, forming, in places, an anastomosing array of...predominantly composite breccias, composed of trachyte clasts, commonly in the form of ellipsoidal pellets...carbonatite magma or ¯uid. Mixed carbonatite and trachyte were emplaced in a ¯uidised system as contemporaneous...southwest Namibia, showing outcrop of the trachyte/trachyte breccia bodies in the peripheral part of the...varieties of carbonatite, but bodies of highly felsic trachyte, commonly in the form of breccias, ranging from |  | Moore, K.R., Wall, F., Divaev, F.K., Savatenkov, V.M. (2009) Mingling of carbonate and silicate magmas under turbulent flow conditions: Evidence from rock textures and mineral chemistry in sub-volcanic carbonatite dykes, Chagatai, Uzbekistan. Lithos, 110 (1) 65-82 doi:10.1016/j.lithos.2008.11.013 | Journal (article/letter/editorial) | | in the magmatic enclaves is similar to that of trachyte dykes in the Chagatai Complex. Using primarily...interpreted as a hydrous trachyte magma that had assimilated upper crustal material. The trachyte magma was entrained...varieties of silicocarbonatite plus sövite and also trachyte dykes. There is, as yet, no consensus as to the...110 (2009) 65–82 The outcrop of carbonatite and trachyte in the same carbonatite complex has generally...quartz syenite and even granite (Woolley, 2003) and trachyte is the fourth most common silicate rock in association |  | | Report (issue) | | and Carbonatites of the World’, namely Part 1: North and South America (Woolley, 1987), Part 2: Former...compilation. This is clearly illustrated by the first (North and South America) volume, to which 32 new localities...(alkali gabbro), phonolite (feldspathoidal syenite), trachyte (syenite), kimberlite, lamprophyre, carbonatite...occurrences for the world, including separate maps for North America (including Greenland), South America, Europe...Alternative name Continent Country State/Province/Territory Latitude Longitude Carbonatite type Magmatic style |  | | 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 |  | | Book | | View of the Oldoinyo Lengai stratovolcano from the north. The volcano is rising 2000 m above its surroundings...Oldoinyo Lengai, Tanzania. Lithos 91: 173–190 Sherrod DR, Magigita MM, Kwelwa S (2013) Geologic map of Oldonyo.... . . . . . . . . . . . . . . . . Route 1: The North Coast . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . . . . . . . 4.2 Road-Cutting North of Hartung (close to the Coastal Road) . . . . .... . . . . . . . . . . . . . . . . 4.11 Old Iron Mine at Stavsätt Farm in Släda . . . . . . . . . 4.12 |  | | Journal (article/letter/editorial) | | Lake Break and most notably at the Kerr-Addison mine (Fig. i) have for many years been attributed to...Larder 0: o I LakeI I I I ° BOSTON Addison mine I 0I SKEAD j~o~ ONTARIO !QUEBEC 110km Legend...flows of trachyte, leucitie trachyte, mafic trachyte, andesite with minor basalt, and quart~ trachyte, in...Nkombwa Hill, Zambia. Breunnerite is also recorded at Lueshe (Zaire) and Kovdor (Kola, U.S.S.R. ), in all cases...interpretations presented are thQse of the author. Dr. R.W. Hodder of the University of Western Ontario |  | | Journal (article/letter/editorial) | | and mineralogy clearly show it is a carbonatite. mine its relationship to carbonatite or other potentially...calcite-bearing dolomite carbonatite dykes of Veseloe, North Transbaikalia (Doroshkevich et al., 2007a) (Fig...Manitoba (Chakhmouradian et al., 2009) and Veseloe, North Transbaikalia, Russia (Doroshkevich et al., 2007a)...Complex, Kola, Zaitsev et al., 2004; Lueshe, Democratic Republic of Congo and Kangankunde, Malawi, Buckley...low-grade metamorphic fluids, but muscovite-rich trachyte sills investigated in the vicinity of the pipe |  | | Journal (article/letter/editorial) | | suite', comprising a complete K-basanite to K-trachyte differentiation series is derived. The isotopic...MUHAVURA O O GAHING~/Z o NYIRAGONGO RWANDA LAKE KIVU EAST AFRIC~ -ORO-'A.KOL~-t RU~GA t\ .;.-! r 0...African Rift System. Adjacent Toro-Ankole and South Kivu fields are also shown. 1983; Vollmer and Norry...the caldera (Figs. 2 and 3 ). The very thick K-trachyte flows and related pumice deposits originate from...extremes are Bufumbira lavas of the basanite-hawaiite-trachyte series (e.g., Karisimbi, Mikeno) that suffered |  | | Book | | HongKong Barcelona Budapest Professor Dr. A. B. KAMPUNZU Professor Dr. R. T. LUBALA Laboratoire de Petrologie...thank Springer-Verlag, the publishers, especially Dr. W. ENGEL (Geosciences Editorial) for the prompt...Permian times in Thdhak province (Fig. 2) along the north-south trending Tesoffi trough, on the eastern margin...northeastern Africa, especially in the Nile River valley, north from Khartoum towards the Egyptian frontier, the...continental trough on the southern borders of the Congo and Thnzania cratons, though comparable in size |  | | Journal (article/letter/editorial) | | hydrothermal ore; ns, nepheline syenite; s, syenite; tp, trachyte-porphyry. GEOLOGY OF ORE DEPOSITS Vol. 62 No...Mount Weld deposit (2.03 Ga), Yilgarn Craton. The mine operating here at the moment extracts only rare-earth...carbonatitic type, formed in the marginal part of the North China Craton (Zhang et al., 2017). Its complex ores...Mabouni foidolite–carbonatite massif (0.66 Ga), Congo Craton, hosting a Nb–REE–P–Ta deposit that has been...carbonatite massif (0.54 Ga) is located in the central North American Platform, beneath the 200-m cover of Phanerozoic |  | Amores-Casals, , Melgarejo, , Bambi, , Gonçalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in Carbonatites—The Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | related to the Lucapa graben, a megastructure cutting Congo, Kasai and Angola Cratons and reactivated during...Kimberlite occurrences are concentrated at the north-eastern part of the graben whereas carbonatites...diameter) in the proximities of the complex, 3 km north or 1 km west of the plug (Figure 1). These intrusions...apatite, magnetite, phlogopite and richterite. Late trachyte dykes cut the central units and basaltic dykes...dykes trending NE–SW were emplaced in Late trachyte dykes cut the central units and basaltic dykes trending |  | Thompson, R., Smith, P., Gibson, S., Mattey, D., Dickin, A. (2002) Ankerite carbonatite from Swartbooisdrif, Namibia: the first evidence for magmatic ferrocarbonatite. Contributions to Mineralogy and Petrology, 143 (3) 377-396 doi:10.1007/s00410-002-0350-0 | Journal (article/letter/editorial) | | Center 1991). GPS co-ordinates for the Swartbooisdrif Mine are 1720¢26.0¢¢ south and 1346¢59.5¢¢ east (using...underlain by Archaean-Proterozoic basement of the Congo craton. Carbonatites and syenites are emplaced in...carbonatites, during the final stabilisation of the Congo craton. Small quarries at Swartbooisdrif expose...omitted. One complex, Lupongola, is only 25 km north of Swartbooisdrif (Verwoerd 1993). We have labelled...complex, Angola? The Lupongola complex, 25 km north of EpembeSwartbooisdrif, resembles the latter, in |  | | Journal (article/letter/editorial) | | crystallization. Greenville, Canada3 Range Average Lueshe, Zaire4 A The new two-feldspar inclusion is noteworthy...Province, Canada (8 analyses, after Ercit 1994), 4 Lueshe carbonatite, Zaire (A Ferrocolumbite, 1 analysis...pyrochlore-beta®te from carbonatites and fenites (e.g. Lueshe, Zaire; Wall et al. 1996) and high values are also...(22% amphibole, 17% mica, 2% apatite) or sodic trachyte (28% amphibole, 20% mica, 3% apatite), producing...olivine ``leucitite'' xenocryst/xenolith suite, North Queensland (B.J. Barron et al. 1996). Silicic, aluminous |  | | 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 |  | | 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 | | 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 |  | | Journal (article/letter/editorial) | | Wanaka in the south to the Paringa River in the north, and is ~25 km wide (Fig 1). The swarm is almost...ED dominant camptonite, to sodalite tinguaite, trachyte and carbonatite. These evolved PT magma compositions...material for this study occurs in Pivot Creek, a north-draining PT tributary of the Haast River (Fig...between carbonatites and cancrinite syenites in the Lueshe Complex, Zaire, and reported (p 68) that “The positive...carbonatites and cancrinite ED syenites from the Lueshe alkaline complex, East Zaire. Journal of African |  | | Journal (article/letter/editorial) | | Hercynian and Alpine orogenies in the extreme north, and the Cape fold belt at the southern tip of the...syenites, with or without carbonatites, are found from Kivu Province through Tanzania to Malawi (Figure 5 )...MAGMATISM k, 1 Monbadio 2 Bingo - Mont Home 3 Lueshe L Kirumba 1. p !j i w .. ..... .. ... .. ....the relative proportion changed with time from north to south. Thus peralkaline granites and quartz syenites...dominance from north to south with volcanics and peralkaline granites dominant in the north and biotite |  | | Book | | Switzerland, into an old Basel family. His father Dr Adolf Streckeisen was a Professor in Medicine. Later...Plutonic kalsilite-bearing rocks of the Aldan and North Baikal petrological provinces of Russia, which are...recommended name. Fields 6 (alkali feldspar trachyte), 7 (trachyte), 8 (latite) — rocks with these root names...6'–8', respectively. Peralkaline trachyte, rather than alkali trachyte, should be used for trachytes containing...feldspar trachyte 20 alkali feldspar trachyte 10 35 foid-bearing alkali feldspar trachyte 65 quartz |  | | Book | | Carolina Biological Supply Company of Burlington, North Carolina. To those whose efforts made the use of...[Gk. skoria, that which is thrown off, dross]; trachyte [Gk. trachus, rough]. Third in abundance (over...rhyodacite (rhyolite-dacite), and trachyandesite (trachyte-andesite). Many of the rocks included in this...Aztecs, Bantus, Mayas, Mongols, New Zealand Maoris, North American Indians, Tartars. Although uncommon, some...serpentinized peridotite in Ontario. Miners’ term. [ Alexo mine, Dundonald Township, Ontario] algarite sed. Bitumen |  | Zhongxin, Yuan, Ge, Bai, Chenyu, Wu, Zhongqin, Zhang, Xianjiang, Ye (1992) Geological features and genesis of the Bayan Obo REE ore deposit, Inner Mongolia, China. Applied Geochemistry, 7 (5) 429-442 doi:10.1016/0883-2927(92)90004-m | Journal (article/letter/editorial) | | deposit is located on the northern margin of the North China platform. When the Proterozoic Bayan Obo Group...dolomite marble intercalated with feldspar rock, the north of the deposit are interpreted as a swarm of biotite...corresponding to that of trachyte, and resemble K-feldspar rock, potassic trachyte and pseudotrachyte devel-...geochemistry of the carbonatite and syenite complex of Lueshe (N. E, Zaire). Lithos 13, 159-170. MENG QINCHANG(1981)...carbonate formation on the northern margin of the North China platform--taking for example the Bayan Obo |  | | 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 |
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