 | | Journal (article/letter/editorial) | | 277 Pandaite from the Mrima Hill niobium deposit (Kenya) By P. M. HARRIS, B.A. Warren Spring Laboratory...(pandaite) has been found at Mrima Hill (Kenya) in a residuum consisting mainly of goethite/limonite and gorceixite...physical, chemical, X-ray, and thermal properties the Mrima pandaite is similar to pandaites described from...niobium in the weathered residuum of the Mrima Hill (Kenya) carbonatite in association with Overseas...several samples t h a t had been collected b y the Kenya Mines and Geological Department. As a result it |  | | Journal (article/letter/editorial) | | mineralization at the Buru carbonatite centre, Western Kenya I. O. ONUONGA1,* AND P. BOWDEN2 1 Department...centre at Buru hill is located towards the eastern end of the Nyanza rift, western Kenya. As revealed by...the Buru carbonatite centre is characterized by goethite, hematite, psilomelane, baryte, fluorite with...possible to use a modern sample of water from the Kenya rift to estimate the equilibration temperature at...at which Buru carbonatite in western Kenya has recrystallized. Temperatures of ~60 to 908C suggest that |  | | Report (issue) | | IRELAND ISRAEL ITALY JAMAICA JAPAN JORDAN KAZAKHSTAN KENYA KOREA, REPUBLIC OF KUWAIT KYRGYZSTAN LAO PEOPLE’S...China (2), Egypt, Ghana, Islamic Republic of Iran, Kenya, Madagascar, Mongolia, the Philippines, Ukraine...FROM SELECTED ALKALINE CARBONATITE COMPLEXES OF KENYA ..................................................characterizing and evaluating national uranium resources; Kenya focused on development of analytical techniques;...INVESTIGATORS FOR CRP IAEA Institute Member State City Kenya University of Nairobi Nairobi Title Multimodal |  | | Journal (article/letter/editorial) | | sideronatrite, 983. Sandford Hill, Weston-super-Mare, Somerset: beudantite, cerussite, goethite, mimetite, 1013....wo]framite, 995. Pengenna mine, St. Kew: meneghinite, 424. South Terras mine, St. Stephen-in Brannel:...argentojarosite, li. WALES Benallt mine, Rhiw, Caernarvonshire: celsian, 508. Clogau mine, Dolgelly, ~ier.ionethshire:...ionethshire: tellurbismuth, 424. Vigra mine, Dolgelly, Merionethshire: tellurbismuth, 424. SCOTLAND Morar...feldspars, 693. Kilrean: prehnite, 234. Meenlargan Hill: prehnite, 234. Rosses granite: feldspars, 975. |  | | Journal (article/letter/editorial) | | of Newcastle, New South Wales, Australia, 2Broken Hill Proprietary Company Limited, Central Research Laboratories...Weld, Western Australia Finland, Brazil, Guyana, Kenya, Tanzania, Zaire and Uganda (McNeil, 1979; Erdosh...hydrous Fe - Nb degradation product (?Nb-bearing goethite), whereas others are partly or totally replaced...assumptions are valid because the abundance of goethite, lepidocrocite, hematite and maghemite and the...Appreciation is expressed to the Management, Broken Hill Proprietary Company Limited, Central Research Laboratories |  | | Journal (article/letter/editorial) | | Baerzhe; 35, Bonga; 36, Kaluwe; 37, Mrima Hill; 38, Panda Hill; 39, Oka 40, Araxa; 41, Catalao I; 42...interest, along with local Nb–brookite and Nb–goethite. All DOKLADY EARTH SCIENCES Vol. 487 Part 1...(discovered here), and Nb-containing rutile and goethite [14]. The Ti–REE–Nb Afrikanda deposit (0.38 Ga...Bonga (the Congo craton); the Kaluwe, Panda Hill, and Mrima Hill (East African rift); and the Oka (Grenvillian...pyrochlore are weakly-weathered ones. Only the Mrima Hill massif has a thick laterite crust with the REEs |  | 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) | | pyrochlore crystals by goethite, as well as the occurrence of Nb-rich goethite and Fe–Mn oxyhydroxides...by a fine-grained mixture of calcite (Cal2) and goethite (Gth). d) Ankerite (Ank) replaced by quartz (Qtz)...by brownish mixtures of calcite and fine-grained goethite. 5.4. Fluoritized and silicified units Fluoritized...of sequences of radial aggregates of goethite and Nb-rich goethite, hollandite [BaMn2+Mn4+7O16], 16], coronadite...coronadite, gorceixite and gibbsite [Al(OH)3]. Nb-rich goethite may develop fine blades, less than 50 μm in length |  | | Book (edition) | | localities as inclusions in the limestone”’ (italics mine). Actually, the first published description of...most of the field work on the Iron Hill complex of Gunnison County, Colorado, in 1912-1913. Although his...accepted the idea of an igneous origin for the Iron Hill carbonatite. In 1924 Bowen, who had visited the...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted...Cove, Arkansas (Erickson and Blade, 1963), Iron Hill, Colorado (Olson and Wallace, 1956), Mountain Pass |  | | Journal (issue) | | Number59 Lead-zinc deposits of the Coast Province of Kenya and some exploration guidelines Overseas Geology...Kinagoni Mine 7 4 Geological section, Kinagoni Mine North 8 5 Geological section, Kinagoni Mine South 9...1982 Lead-zinc deposits of the Coast Province of Kenya and some exploration guidelines S. F. BUGG ABSTRACT...Per1110-Triassic rocks of the Coast Province of Kenya several small and one large occurrence of lead mineralisation...plain. The largest of these occurrences, at Kinagoni Hill is composed of a stockwork of minor veins within |  | | Journal (article/letter/editorial) | | . . . . . . . . . . . . . . . goethite hematite plumhogummite group . . . . . ... . . . . . . . . . . . . apatite goethite . . . . . . . . . . . . . . . ...AI, Mn, Ca. K, Mg, Ba hematite, lepidocrocite, goethite, maghemite Mn-oxyhydroxides Nb, Ti, Co, Ni, Si...monazite commonly occurs as aggregates with rims of goethite and/or plumbogummites. The aggregates may contain...contain inclusions of apatite, plumbogummites, goethite, cerianite, ilmenite, quartz and Mn minerals. Investigations |  | | Journal (article/letter/editorial) | | Bearpaw Mtns., Montana, pseudoleucite, 596. Benallt mine, Rhiw, Caernarvonshire, celsian, 508. Berek compensator... 2rid edn, Vol. 2, 554; Vol. 3, 1022. Boqueirdo mine, Parelhas, Rio Grande do Norte, Brazil, leucophosphite... 200. Brazilianite, Brazil, d.t.a., 427. Brejui mine, Currais Novos, Rio Grande do Norte, Brazil, bismuth...Mechanism of decomposition of serpentine, 189. Broken Hill, New South Wales, plagioclase, 488. Bromellite,... Capo di Bavo, Rome, leucite, 596. Cariboo gold mine, Wells, British Columbia, scheelite, 995. CARN~mO |  | | 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 |  | | Journal (article/letter/editorial) | | Baerzhe; (35) Bonga; (36) Kaluwe; (37) Mrima Hill; (38) Panda Hill; (39) Oka; (40) Araxa; (41) Catalão I;...Fir Chuktukon Toongi Baerzhe Bonga Kaluwe Mrima Hill Panda Hill Oka Araxa Catalão I Catalão II Salitre Tapira...Mount Weld deposit (2.03 Ga), Yilgarn Craton. The mine operating here at the moment extracts only rare-earth...(ilmenorutile), and, partially, in Nb– brookite, Nb–goethite, and secondary pyrochlore, which all formed due...at this deposit), Nb–rich rutile, and Nb–rich goethite. 56 TKACHEV et al. Ore minerals are characterized |  | | Book | | MINERALS& GEMSTONES of East Africa Burundi, Kenya, Rwanda, Tanzania and Uganda Bruce Cairncross Published...Africa 10 East African resources 12 Burundi 13 Kenya 14 Rwanda 16 Tanzania 17 Uganda 20 Gemological properties...through Tanzania, Kenya, Ethiopia and into the Sudan - has blessed East Africa, Kenya and Tanzania, with...now mainland Tanzania) and then progressing to Kenya - I am proud to say that the coloured gemstones...fact is that both of the national gemstones of Kenya and Tanzania (tsavorite and tanzanite, respectively) |  | | Report (issue) | | Report No. 45 COLONY AND PROTECTORATE OF KENYA MINISTRY OF COMMERCE Ä N D INDUSTRY GEOLOGICAL SURVEY...of South Nyanza, in the south-western corner of Kenya. It is a most important area as in its northern...there at an earlier date. The Macalder gold-copper mine lies in the south-west part of the area, and a brief...Rusinga Island 49 Fig. 6—Geological section of Kiahera hill, Rusinga Island 52 Fig. 7—Sketch section of the...1,400 square miles of South Nyanza, in western Kenya, on the shore of Lake Victoria! The land area is |  | | Journal (article/letter/editorial) | | grained and intimately intergrown with hematite, goethite and minerals of the crandallite group. The different...re-evaluated [e.g. Oka (Canada); Fen (Norway); Panda Hill (Tanzania)] for their economic potential. Although...only operating Nb mine in under-saturated peralkaline syenites is the Karnasurt mine (Kremenetsky et al...melilitite–nephelinite complex of Kisingiri-Rangwa, Kenya (Le Bas, 1977). Here an eroded volcanic cone consisting...units presents in carbonatites e.g. the Loolekop mine at Phalaborwa (Fig. 250 of Woolley, 2001), Catalão-I |  | | 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 |  | | Report (volume) | | yielded 16,230.7 tons during 1953-56 (Pike, 1958). The mine closed in March 1959 but reportedly was reopened...Shield, Canada. Granophyre_______________ Fairfax County, Va •.. Granite (Boundary Peak California ____________...________________ _ Nepheline syenite_________ Augusta County, Va•• Phonolite and tephrite. ___ Kaiserstuhl,... U.S.S.R. Teschenite __ -------------- Augusta County, Va __ 13 8 8 (1962). ----------------------2...U.S.S.R. Picrite _____________________ Augusta County, Va __ 4 7. 8-14.1 Gottfried and others 11 (1962) |  | 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) | | Minière de l'Ogooué (COMILOG)/ ERAMET Cortec Mining Kenya Ltd./ Pacific Wildcat Resources Corp. ? 660 Ma...20% Nb2O5 cutoff Mrima Hill, JomboMrima alkaline complex, Kwale Dist., southern Kenya Disputed between...Niocan Inc.; mined in 1961– 1976 by St. Lawrence mine, Oka complex, Deux-Montagnes, Qué- Columbium and...material (Fig. 3c) containing goethite pseudomorphs after pyrite and goethite–calcite aggregates replacing...have been reported from carbonatites in Ravalli County, Montana (Hess and Trumpour, 1959), at Mbeya in |  | | Report (issue) | | of identical Institution iron oxide, possibly goethite, localized at the crystal- of Mineral Sciences...Westville, Ohio Obernkirchen, Germany St. Genevieve County, see Missouri * Buchwald and Munck cat.no. ...reported to be present in carbonatites such as Mrima Hill, Kenya, (Binge and diamond mining operations of... Hoffman and F. Mostert, Managing Director and Mine Manager of the Buffelsbank Diamante Edms. Bpk, for...The Mrima Hill Niobium Deposit, Coast Province Kenya. Information Circular No. 2 Republic of Kenya Geological |  | | Book | | sills), if they are exposed in outcrop or in the mine workings at all. The Climax Mo complex is the best...known (e.g. the Montana Tunnels deposit, Obelisk Mine). The former locality contains disseminated pyrite...km from Balkhash (city). It cropped-out in a low hill of heavily silicified rocks surrounded by Cainozoic...joints ~~jr-*~z?Z. Joint pattern ί Quarts veins ft Mine; fr-iron, Cwcefiper, m U.S. Homestead mmmww** Vehicle...accumulated in endocontact stockworks. The small Jessie mine in the Breckenridge field (about 2 t Au; Lovering |  | | Report (volume) | | based on considerations that extend far beyond the mine itself, in some instances relating to the overall...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes...government believed might someday be economic ta mine. Stratiform deposits of large areal extent, such...Zn-Mn-Fe oxide/silicate bodies at Franklin and Sterling Hill, or the Cu-U-Au at Olympic Dam, or the Cu-Zn-Pb-Ge...Name Country Name Country Carnilya E. Carnilya Hill Damba Epoch E. Scotia Hitura Hunters Road Kambalda |  | | Book | | sills), if they are exposed in outcrop or in the mine workings at all. The Climax Mo complex is the best...known (e.g. the Montana Tunnels deposit, Obelisk Mine). The former locality contains disseminated pyrite...km from Balkhash (city). It cropped-out in a low hill of heavily silicified rocks surrounded by Cainozoic...accumulated in endocontact stockworks. The small Jessie mine in the Breckenridge field (about 2 t Au; Lovering...cover sequences, and 1034 Fig. 28-14. Jessie gold mine, Breckenridge, Colorado. LITHOTHEQUE, after Ransome |  | | Journal (issue) | | Structures on a Kenya Trachyte. By B. N. Temperley, B.Sc., Ph.D., Mines and GeologicalDepartment, Kenya . . . The...425 429 438 REPORTS FROM THE GEOLOGICAL SURVEYS Kenya • • • Uganda • • • Tanganyika • Northern Rhodesia... 412 413 412 Gigantic PressureStructures on a Kenya Trachyte Text-fig. 1 • Text-fig. 2 Text-fig. 3...dominated in the north by the flat-topped hill of Nsamuzi. Between this hill and the smaller hills of Buzindere...peninsula is found on the southern flank of Nsamuzi Hill. The rock is very fine-grained, highly micaceous |  | | Book | | carbonatitic-alkaline province outcropping on the Kenya-Uganda border which have recently received significant...domain characterized East Africa from Madagascar and Kenya-Ethiopia to northeastern Sudan. It represents the...Popoff 1988a). Like the Atlantic Benue trough, the Kenya-Sudan Mesozoic trends could correspond to a failed...Segoufin and Patriat 1981; Mougenot et al. 1986). The Kenya-Sudan Mesozoic troughs hypothetized above could...East-African rift. This suggests that the Mesozoic NW-SE "Kenya-Sudan" rift-system has been reactivated, similarly |
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