 | | Report (issue) | | IRELAND ISRAEL ITALY JAMAICA JAPAN JORDAN KAZAKHSTAN KENYA KOREA, REPUBLIC OF KUWAIT KYRGYZSTAN LAO PEOPLEāS...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) | | High, Yorkshire: azurite, lxxxvi Cornwall Geevor mine, Pendeen, St. Just-inRoseland: uraninite, xc Hingston...1081 South Crofty mine, Illogan, Redruth: coffinite, uraninite, xc South Terras mine, St. Stephen-inBrannel:...Derbyshire Calton Hill: olivine, ortho- and clinopyroxene, spinel, 483 Golconda mine, Hopton: auricha]cite...Edge: aurichalcite, 441 Masson Hill, Matlock: cinnabar, xc Nestus mine, Matlock Bath: aurichalcite, 441...Wood: coffini~e, uraninite, xe Staffordshire Ecton Hill, Wetton: aurichaleite, celesfine, hydrozincite, |  | | 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...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...carbonatite magmatic processes. K EY WORDS : Nyanza rift, Kenya, ferrocarbonatite, ferruginous calciocarbonatite |  | | Book (edition) | | localities as inclusions in the limestoneāā (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 (article/letter/editorial) | | NR NR Subtotal 8 115 NR NR 1.41 7,557 NR NR NR Kenya Carbonatite 2 163 3.6(1) 0.27(1) 3.9 6,286 450(1)...types. Ore Grade (%TREO+Y) 10 1 0.1 Allanite Apatite BastnƤsite Eudialyte 0.01 Monazite Ionic Clay...Carbonatite Low NR Chilwa Island Malawi Carbonatite Low Apatite, bastnƤsite, ā florencite, fluorite, ā...churchite Bou Naga Mauritania Carbonatite Low Apatite, barite, bastnƤsite, ā fluorite, monazite Kangankunde...High Monazite, apatite Muluozhai China Carbonatite Low BastnƤsite Ruri Complex Kenya Carbonatite Low |  | | Book | | RESOURCES OF KENYA By WILLIAM PULFREY. M.Sc., Ph.D., F.G .. , Assoc.Inst.M.M. Sniior Geolo!list, Kenya Colony...RESOURCES OF KENYA By WILLIAM PULFREY, M.Sc., Ph.D., F.G.S., Assoc.lnst.M.M . . Senior Geologist, Kenya Colony...282 283 283 284 285 Production of Minerals in Kenya Gold and Silver . Soda Products Other Minerals of... ā¢ ILLUSTRATIONS PlaJe No. I. Rosterman Gold Mine, Kakamega . facing p. 288 Lake Magadi and the... 289 p. 289 II. Simplified Geological Map of Kenya ( In pocket) Mineral Map of.Kenya ( Map Showing |  | | Journal (article/letter/editorial) | | References BAKER (B. H.), 1954. Rept. Geol. Surv. Kenya, no. 27. BO~LEu (G. D.), 1963. Min. Mag., vol. 33...few small crystals of aegirine, and accessory apatite, zircon, and iron ore. Scattered irregularly through... 15 %; biotite, 15 %; phosphate mineral, 4 %; apatite, 3 %; rutile, 2 %; aegirine, 0.5 %; iron ore, 0...the weathered rocks surrounding the Mrima Hill carbonatite, Kenya, (Coetzee and Edwards, 1960), where...considered to have formed from weathered baryte, apatite, and aluminous material. In the Tanzanian rock |  | | 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... Fe-hydroxides and clays commonly overlies an apatite-rich residuum (Fig. 2). Both horizons possess minor...CaO and Na20 (samples D). Pyrochlore from the apatite/crandallite group interface (samplesC) shows the...and Ca with reoccupation by Sr and Ce. From the apatite-rich horizon to the crandallite-rich zone at the |  | | Journal (article/letter/editorial) | | together with published analyses from fenites of Kenya, Uganda and Tanzania, include those of co-existing...Other minerals that sometimes occur are biotite, apatite, calcite and fluorite. Fenites of this type are...formed from pyroxene-gneiss (Napak), sandstones (Mrima Hill [BAKEI~, 1953]), acid volcanics (I{oma) and even...complexes of eastern Uganda and the Nyanza area of Kenya, the author and colleagues selected specimens from...KiLorneU-es I Fig. 2. Map of eastern Uganda and western Kenya, showing main ijolite-carbonatite intrusive complexes |  | | Report (issue) | | Report No. 45 COLONY AND PROTECTORATE OF KENYA MINISTRY OF COMMERCE Ć 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...anomalies and associated columbium deposits (2) Apatite 3. Other minerals (1) Limestone (2) Vermiculite...Rusinga Island 49 Fig. 6āGeological section of Kiahera hill, Rusinga Island 52 Fig. 7āSketch section of the |  | | Journal (article/letter/editorial) | | the weathered rocks surrounding the Mrima Hill carbonatite, Kenya, (Coetzee and Edwards, 1960), where...considered to have formed from weathered baryte, apatite, and aluminous material. In the Tanzanian rock |  | | Journal (article/letter/editorial) | | considered to be attractive targets by Mountain Pass mine in California. Mountain Pass was for companies and...(Australia), AraxĆ” and CatalĆ£o I (Brazil), Mrima Hill (Kenya), Mabouni (Gabon), and several other carbonatite...dissolution present a problem in chemical processing. Ā Apatite [Ca5 (PO4) 3 (F,Cl,OH)] can contain substantial...substituting for Ca. The best economic grades of apatite, with as much as 6 wt% REE, are rare. Examples...Khudag (Mongolia). The Hoidas Lake (Saskatchewan) apatite contains as much as 5 wt% REE. In all cases, with |  | | Report (volume) | | - - - - - Resembles bastnaesite Belovite- - - Apatite group - (Sr, Ce, Na, Ca)5 (P04)a (OH)- - - RE varieties...Alma-ata, U.S.S.R. Kenya Geol. Survey Bull.-Geological Survey of Kenya Bulletin. Nairobi, Kenya. Khim Anal.... Oak Ridge, Tenn. Nucleonics-Nucleonics. McGraw-Hill Publishing Co. New York, N.Y. Nuevo Cimento-11 Nuevo...Monazite deposits in calcareous rocks, Northern Lehmi County, Idaho: Idaho Bur. Mines and Geology Pam ph. 99...Beryllium deposits of the Mount Antero region, Chaffee County, Colorado: U.S. Geol. Survey Bull. 982-D, p. 95-119 |  | | 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 ā¢ 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) | | preservation of a residuum rich in primary igneous apatite. After decalcification of the profile, acid solutions...(Fig. 1 ). A residuum rich in primary igneous apatite and immediately overlying the carbonatite, is overlain...the progressive accumulation of primary igneous apatite and minor oxides, sulphides and silicates (Willett.... . . . . . . . . . . . maghemite apatite calcite dolomite hollandite cryptomelane kaolinite... . . . . . . . . . . . . . . . apatite goethite . . . . . . . . . . . . |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., GonƧalves, Antonio O., Neto, AndrĆ©s 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) | | association with accessory amounts of magnetite and apatite as well as minor amounts of pyrochlore, baddeleyite...correlation is observed between the pyrochlore and the apatite contents. Magmatic banding with millimetre thickness...(Cal1). Late veinlets of anhedral hydrothermal apatite (Ap2) are also visible throughout the sample. b)...To notice the presence of some euhedral primary apatite (Ap1) crystals. Minor replacement of dolomite by...electron microscope, in BSE mode. a) Secondary apatite (Ap2) veined by calcite (Cal2), barite (Brt) and |  | | 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) |  | Taylor, Ryan D., Shah, Anjana K., Walsh, Gregory J., Taylor, Cliff D. (2019) Geochemistry and Geophysics of Iron Oxide-Apatite Deposits and Associated Waste Piles with Implications for Potential Rare Earth Element Resources from Ore and Historical Mine Waste in the Eastern Adirondack Highlands, New York, USA. Economic Geology, 114 (8) 1569-1598 doi:10.5382/econgeo.4689 | Journal (article/letter/editorial) | | 1569ā1598 Geochemistry and Geophysics of Iron Oxide-Apatite Deposits and Associated Waste Piles with Implications...Earth Element Resources from Ore and Historical Mine Waste in the Eastern Adirondack Highlands, New York...Montpelier, Vermont 05602 Abstract The iron oxide-apatite (IOA) deposits of the eastern Adirondack Highlands...concentrations of rare earth element (REE)-bearing apatite crystals. The majority of the deposits are hosted...mined in the United States since the Mountain Pass mine, California, was put on care and maintenance at |  | | Report (issue) | | able.pdf. Cover. The Mountain Pass Mine, San Bernardino County, California, was the only active producer...............................................O21 Mine Waste Characteristics.........................................................................O22 Mine Closure...........................................Figures O1. O2. O3. O4. O5. Graph showing world mine production of rare-earth oxides, by country and...O6 Photograph of the Mountain Pass Mine in San Bernardino County, California, which was the only active |  | | Journal (issue) | | the Colonies With appende,d summary reports on: Kenya . Uganda ā¢ Tanganyika . ā¢ ā¢ ā¢ ā¢ ā¢ ā¢ Northern...Resources COLONIAL GEOLOGICAL ABSTRACTS Part I .-Kenya . ā¢ ā¢ ā¢ ā¢ ā¢ā¢ Vll ā¢ā¢ā¢ Vlll CONTENTS PAGE...selection of these abstracts deals exclusively with Kenya. Papers published since 1950 have been abstracted...of later crystallisation in the coarser rocks. Apatite too, is always abundant but only conspicuous in...coarser and fresher than that studied by Shand. Apatite and iron ore are always present but never conspicuous |  | | Journal (article/letter/editorial) | | Baerzhe; (35) Bonga; (36) Kaluwe; (37) Mrima Hill; (38) Panda Hill; (39) Oka; (40) Araxa; (41) CatalĆ£o I;...Fir Chuktukon Toongi Baerzhe Bonga Kaluwe Mrima Hill Panda Hill Oka Araxa CatalĆ£o I CatalĆ£o II Salitre Tapira...Mount Weld deposit (2.03 Ga), Yilgarn Craton. The mine operating here at the moment extracts only rare-earth...of other compositions, as well as columbite and apatite which are ubiquitously present in ores, predominantly...the Congo Craton, and the Kaluwe, Panda Hill, and Mrima Hill complexes in the influence zone of the East |  | | Report (volume) | | yielded 16,230.7 tons during 1953-56 (Pike, 1958). The mine closed in March 1959 but reportedly was reopened...is a constituent of accessory minerals such as apatite, sphene, allanite, thorite, monazite, and zircon...Shield, Canada. Granophyre_______________ Fairfax County, Va ā¢.. Granite (Boundary Peak California ____________...________________ _ Nepheline syenite_________ Augusta County, Vaā¢ā¢ Phonolite and tephrite. ___ Kaiserstuhl,... U.S.S.R. Teschenite __ -------------- Augusta County, Va __ 13 8 8 (1962). ----------------------2 |  | | Report (issue) | | INSTRUCTIONAL COURSES AND SPECIALIST Ass!STANCE KENYA UGANDA TANGANYIKA 44 NORTHERN RHODESIA. 48 57...Building, London Frontispiece Activities of the Kenya Geological Survey Jacingp. 30 Headquarters ofthe...Islands ,, 117 Text-fig. 1 Geological Mapping in Kenya page 30 Text-fig. 2 Establishment and Strength of...dealing with the individual countries concerned. In Kenya, for instance, 17,790 sq. miles had been geologically...Jur assic and Cretaceous sediments in north-east Kenya and ofKarroo to Recent sediments near the coast |  | | Journal (article/letter/editorial) | | the beforsitic (dolomite bearing) dikes at Sengeri Hill (Mbeya carbonatite, southwestern Tanzania, East...in two belts, an eastern belt along the Uganda-Kenya border, and a western one along the Uganda-Congo...trending belt were sampled: Sukulu Hill, Tororo Hill and Bukusu Hill (Fig. 2, for geology see DAVIES, 1956)...and fenitized granite. The carbonatite at Tororo Hill represents a plug along a dike. The prominent spine...BAERTSCHI (1957): 9. Chilwa Island (2); 10. Chigwakwalu Hill, Tundulu (2); 11. Kolyano Crater (1); 12. K&we Crater |  | | Journal (article/letter/editorial) | | Kimberlites and Their Ultramafic Xenoliths from Western Kenya M. Ito With 6 Figures Received December 11, 1985;...aeromagnetic anomalies in Nyanzian terrane in western Kenya. Three kimberlites, Y1B1, Y1B3 and YA17, are composed...the late stage of diatreme development. Western Kenya kimbedites are free of mantle-derived chromian garnet...YA17 kimberlite. Ultramafic xenoliths in western Kenya kimberlites consist mainly of garnet-free harzburgite...A1203, CaO and Na20. The emplacement of western Kenya kimberlite diatremes is considered to have been |
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