 | | Journal (article/letter/editorial) | | and geochemistry of the carbonatite and syenite complex of Lueshe (N.E. Zaire) H. v. MARAVIC& G. MORTEANI...and syenite complex of Lueshe (N E. Zaire). Lithos 13, 159-170. Oslo. ISSN 0024-4937. The Lueshe carbonatite...investigations show that the different types of syenite of the alke,line complex belong mainly to the miaskitic...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, |  | | Report (issue) | | 519(1) c = 5.505(1) Z=8 X-ray Powder Pattern: Lueshe, Congo. 3.91 (100), 2.77 (69), 1.955 (43), 1.96 (34)...46] 100.00 Na2 O TiO2 3.62 12.23 18.91 (1) Lueshe, Congo; Fe2 O3 and TiO2 on a separate sample, SiO2...vermiculitelike mica, at the contact of cancrinite syenite with carbonatite (Lueshe, Congo); in sodalite xenoliths associated...associated with an intrusive alkalic gabbro-syenite complex (Mont Saint-Hilaire, Canada); a common accessory...(Ilı́maussaq intrusion, Greenland). Association: Mica (Lueshe, Congo); sodalite, ussingite, villiaumite, steenstrupine |  | | 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 |  | Mitchell, Roger H., Burns, Peter C., Knight, Kevin S., Howard, Christopher J., Chakhmouradian, Anton R. (2014) Observations on the crystal structures of lueshite. Physics and Chemistry of Minerals, 41 (6) 393-401 doi:10.1007/s00269-014-0657-1 | Journal (article/letter/editorial) | | perovskite-group mineral lueshite from the type locality (Lueshe, Kivu, DRC) and pure NaNbO3 demonstrate that lueshite...crystal structures of lueshite (2 samples) from Lueshe, Mont Saint-Hilaire (Quebec, Canada) and Sallanlatvi... Conventional neutron diffraction patterns for Lueshe lueshite recorded over the temperature range 11–1...Time-of-flight neutron diffraction patterns for Lueshe lueshite recorded from room temperature to 700...from the Lueshe carbonatite complex (Maravic et al. 1989), North Kivu (Democratic Republic of Congo) by Safianikoff |  | | Journal (article/letter/editorial) | | been found and analysed in carbonatites from the Lueshe, Newania, Kangankunde, and Chipman Lake complexes...siderite. Material analysed and results Lueshe, Zaire. Lueshe is a complex of carbonarites, including...including dolomitic and calcitic varieties, and cancrinite syenite, situated at the northern end of the western...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...is interest in the evaluation of several A-type syenite/granitoid complexes for their Nb potential. These...only operating Nb mine in under-saturated peralkaline syenites is the Karnasurt mine (Kremenetsky et al...niobium–yttrium–fluorine-rich (NYF) peralkaline granite/syenite-hosted Nb deposits it is apparent that mineralogically |  | | 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...ijoliteurtite-melteigite series, nepheline syenite, fenitized syenite and quartz syenite, and finally fenitized granite...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 |  | | 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) | | 8 , * ~ 0 . 2 , w = 0 and 0 . 2 < n < l ) from Lueshe, Zaire is a defect pyrochlore species whose A-site... powder pattern I. INTRODUCTION The Lueshe cancrinite syenite/carbonatite complex is located in the...pyrochlore subgroup, from the residual soils of the Lueshe carbonatite deposit. The calculated density is...London show that the kalipyrochlore from the Lueshe deposit (Kivu, Zaire) has a formula lying between the |  | | Journal (article/letter/editorial) | | Z:8. The mineral occurs at Lueshe, 150 km. north of Goma, Belgian Congo, as incrustations on a compact...heated. The mica occurs at the contact of cancrinite syenite lvith carbonatite containing pyrochlore. |  | | Book (edition) | | nepheline-syenite bodies which occur at some localities as inclusions in the limestone”’ (italics mine). Actually...‘‘fine-grained but crystalline,” (5) that they were 1] thank Dr. G. R. Udas for bringing this historic description...entstanden sind.” The notion that the parent nepheline syenite magma had been enriched through limestone syntexis...gneisses, and invaded as elsewhere by nepheline-syenite” (Fig. 1-2). This was the initial (1934) identification...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted |  | | 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) | | carbonatites elsewhere in Africa (e.g. Lueshe, Democratic Republic of the Congo), the Buru carbonatite centre...weathered crusts. It also has been reported from the Lueshe carbonatite complex, where it was observed to be...and encouragement given by Prof. A.E. Fallick and Dr A. Boyce at the Scottish Universities Research and... Morteani, G. and Roethe, G. (1989) The cancrinite -syenite/ carbonatite complex of 672 LANTHANIDE... LANTHANIDE MINERALIZATION, BURU CARBONATITE Lueshe, Kivu/NE Zaõ¨re: Petrographic and geochemical studies and |  | | 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...1986; Pinna et al., 1993:950-800 Ma). Towards the North, however, Mozambiquian collision is younging (in |  | 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) | | with evolved silicate rocks, including syenite, quartz syenite and even granite (Woolley, 2003) and trachyte...globules of calcite carbonatite within nephelinite or syenite is often interpreted in terms of liquid immiscibility...carbonatite at Lueshe, D.R. Congo where incorporation and metasomatic alteration of cancrinite syenite xenoliths...comparison with melting experiments of nepheline syenite (Millhollen, 1971): the solidus at pressures N0... Millhollen, G.L., 1971. Melting of nepheline syenite with H2O+CO2, and the effect of dilution of the |  | | Journal (article/letter/editorial) | | tantaloniobates, carbonatite, nepheline syenite, alkali granite, syenite, supercontinent cycle DOI: 10.1134/S1075701520010067...Siilinjärvi carbonatite and Saharjok nepheline–syenite (Zozulya et al., 2007). In the former, pyrochlore...as, alkali syenite; cb, carbonatite; h, hydrothermal ore; ns, nepheline syenite; s, syenite; tp, trachyte-porphyry...Mount Weld deposit (2.03 Ga), Yilgarn Craton. The mine operating here at the moment extracts only rare-earth...Craton, namely, the Montviel carbonatite–nepheline–syenite (Nadeau et al., 2015) and Argor carbonatite–pyroxenite |  | | 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 (issue) | | the collection; "Person behind the Mineral name cancrinite" - a story by German mineralogists - Joachim...Volker Count Georg Cancrin and the History of Cancrinite Discovery ..........24 Boris l. Kantor Druza...Schumacher Graphite (35 x 32 cm) of the Alibert Mine, Botogol Mt. in Siberia, rough materiaL two pencils...research in Europe. Several further expeditions to North and Central America, as well as to Africa, were...Haidinger in 1859 1842 in the Tsarevo-Alexandrovskaya mine near Tashkurganka River, Miass, Urals. The original |  | | 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 |  | | Book | | Switzerland, into an old Basel family. His father Dr Adolf Streckeisen was a Professor in Medicine. Later...petrography of the interesting and unique nepheline syenite massif of Ditro in Transylvania, on which he published...monzonite must have the same status as quartz-syenite to syenite and quartz-diorite to diorite. On this critical...the various “foid” root names, e.g. nepheline syenite; and 34 are rock terms. The Bibliography has18...kalsilite, analcime, sodalite, nosean, haüyne, cancrinite and pseudoleucite. M = mafic and related minerals |  | | 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 |  | Mikhailova, Julia, Ivanyuk, Gregory, Kalashnikov, Andrey, Pakhomovsky, Yakov, Bazai, Ayya, Panikorovskii, Taras, Yakovenchuk, Victor, Konopleva, Nataly, Goryainov, Pavel (2018) Three-D Mineralogical Mapping of the Kovdor Phoscorite–Carbonatite Complex, NW Russia: I. Forsterite. Minerals, 8 (6) 260 doi:10.3390/min8060260 | Journal (article/letter/editorial) | | Sokli, Tapira, etc.), Nb (Araxá, Catalăo, Fen, Lueshe, Mt. Weld, Oka, Panda Hill, St. Honoré, Tomtor...and veins (up to 5 m thick) of nepheline and cancrinite intrusion. Numerous dikes and veins (up to 5...5 m thick) of nepheline and cancrinite syenite, syenite, (micro)ijolite, phonolite, alnoite, shonkinite...the North) and along A-B line, after [11]. complex: (b) horizontal (−100 m, Y axis shows the North) and...part of the phoscorite-carbonatite pipe to the north-east and associates with the central part of the |  | | Book (volume) | | felspars we have been particularly fortunate in having Dr W. S. MacKenzie close at hand and are most grateful... ..... 303 Helvite, Danalite, Genthelvite CANCRINITE.310 SCAPOLITE.321 ANALCITE.338 ZEOLITE GROUP...nomenclatures we have been guided princip¬ ally by Dr. W. S. MacKenzie, whose assistance is gratefully...Sodium-rich orthoclase cryptoperthite, ijolite-nepheline-syenite, Sinkwa, Mogok, Burma (Tilley, 1954). Anal. J....2-4 30-2 1-7 9. Orthoclase (“anorthoclase”), syenite, 1-4 Supsa river, W. Georgia, Si A1 Fe+S T |
|
