 | | 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...characterized by goethite, hematite, psilomelane, baryte, fluorite with minor calcite, bastnaĚsite and significant...calciocarbonatite containing siderite, baryte and fluorite, a greater proportion of bastnaĚsite replacing...possible to use a modern sample of water from the Kenya rift to estimate the equilibration temperature at |  | | Report (issue) | | IRELAND ISRAEL ITALY JAMAICA JAPAN JORDAN KAZAKHSTAN KENYA KOREA, REPUBLIC OF KUWAIT KYRGYZSTAN LAO PEOPLEâS...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 |  | | Book (edition) | | (Jacupiranga, Brazil). In addition deposits of fluorite, magnetite, vanadium, and vermiculite occur associated...phosphate, Fe, Cu, barite, vermiculite, CaCOs;, fluorite, Ti, nepheline, and Zr. HISTORY OF CARBONATITE...localities as inclusions in the limestoneââ (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 |  | | 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)...Carbonatite Low Apatite, bastnäsite, â florencite, fluorite, â pyrite Mount Weld Australia Carbonatite...Carbonatite Low Apatite, barite, bastnäsite, â fluorite, monazite Kangankunde Malawi Carbonatite High...Complex Kenya Carbonatite Low Bastnäsite, eudialyte, â fluorite, monzite Mrima Hill Kenya Carbonatite...Carbonatite High Apatite, magnetite, barite, â fluorite Chuktukonskoye Russia Carbonatite Medium Apatite |  | | Report (volume) | | obruchevite Yttrocerite - - - - Cerian yttrian fluorite - - - - Yttrocolumbite - - (Y, U, Fe) (Nb, Ta)...dominant. Poorly defined names. - Also yttrian fluorite. YF 3 may be 15-20 percent. Poorly defined. Synonym:...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 |  | | 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... ⢠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) | | considered to be attractive targets by Mountain Pass mine in California. Mountain Pass was for companies and...(Australia), AraxĂĄ and CatalĂŁo I (Brazil), Mrima Hill (Kenya), Mabouni (Gabon), and several other carbonatite...mineralogy ⢠24 Llano, Baringer Hill, TX Xenotime, etc. ⢠25 Harding Mine, NM Xenotime, etc. ⢠26 Maw...Beatty River, SK Xenotime Fluorite and REE mineralization ⢠28 Snowbird Mine, MT Parisite Hydrothermal...Benjamin River, NB REE substituting in apatite Fluorite and REE mineralization in carbonatite environments |  | | Journal (article/letter/editorial) | | Baerzhe; 35, Bonga; 36, Kaluwe; 37, Mrima Hill; 38, Panda Hill; 39, Oka 40, Araxa; 41, Catalao I; 42...CaF2 resources in China; however, pyrochlore and fluorite are released into tailings. NbâZr ores (pyrochlore...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 |  | | Journal (article/letter/editorial) | | together with published analyses from fenites of Kenya, Uganda and Tanzania, include those of co-existing...sometimes occur are biotite, apatite, calcite and fluorite. Fenites of this type are developed from a wide...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 Ă 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. 6âGeological section of Kiahera hill, Rusinga Island 52 Fig. 7âSketch section of the...1,400 square miles of South Nyanza, in western Kenya, on the shore of Lake Victoria! The land area is |  | Melgarejo, Joan C., Costanzo, Alessandra, Bambi, Aurora C.J.M., Gonçalves, Antonio O., Neto, AndrĂŠs 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) | | inclusions of euhedral type IV pyrochlore (Pcl4). Fluorite crystals are mantled by hollandite (Hol), gibbsite...remnants can be replaced by gibbsite [Al(OH)3]. Fluorite is also produced after ankerite or other carbonates...rocks following the contact between these rocks. Fluorite is generally deep violet in colour, less than...âpandaitesâ from Panda Hill in Tanzania (Jager et al., 1959), Mrima Hill in Kenya (Harris, 1965) and AraxĂĄ...(Eds.), Phoscorites and Carbonatites from Mantle to Mine: Mineralogical Society Series, 10, pp. 293â337. |  | | 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) CatalĂŁo I;...Fir Chuktukon Toongi Baerzhe Bonga Kaluwe Mrima Hill Panda Hill Oka Araxa CatalĂŁo I CatalĂŁo II Salitre Tapira...means baddeleyite; bi, biotite; Ń, cassiterite; f, fluorite; k, K-feldspar; mo, molybdenite; mz, monazite;...Mount Weld deposit (2.03 Ga), Yilgarn Craton. The mine operating here at the moment extracts only rare-earth...in terms of niobium (pyrochlore) and fluorine (fluorite) reserves, although these components are not extracted |  | | Journal (article/letter/editorial) | | suggested for the deeply weathered Mrima Hill carbonatite laterite, Kenya, that 5-10 volumes of carbonatite... 1979. Complex formation of trace elements in fluorite bearing geochemical systems, II. Stability of...and Edwards, C.B., 1959. The Mrima Hill carbonatite, Coast Province, Kenya. Trans. Geol. Soc. S. Afr.,...deeply-weathered perrierite-bearing pegmatite, Bedford County, Virginia. Southeast. Geol., 18: 3747. Moeller |  | | 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 |  | | 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) |  | | Journal (issue) | | GAMBIA GIBRALTAR GOLD COAST HONG KONG JAMAICA KENYA LEEWARD IS. MALAYA MALTA MAURITIUS NIGERIA NORTH...Resources of Kenya. By William Pulfrey, M.Sc., Ph.D., F.G.S., Assoc. Inst. M.M., Senio,y Geologist, Kenya Colony...Edition. Pp. xvi + 312, 81 x 5f. (London : Leonard Hill, Ltd., 1947.) Price 35s. Tl1is work was first published...xviii 494, gÂź X 6. (New York and London: McGraw-Hill Book Co., Inc., 1947.) Price $5.00. In view of the...Pp. xi 326, 9 X 6. (New York and London: McGraw-Hill Book Company, Inc., 1947.) Price 27s. THE SKYSCRAPER |  | | 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 |  | | 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 ⢠Tanganyika . ⢠⢠⢠⢠⢠⢠Northern...Resources COLONIAL GEOLOGICAL ABSTRACTS Part I .-Kenya . ⢠⢠⢠⢠â˘â˘ Vll â˘â˘â˘ Vlll CONTENTS PAGE...selection of these abstracts deals exclusively with Kenya. Papers published since 1950 have been abstracted...Depths of the Earth.'' 598 pp. (New York~ McGraw-Hill Book Company.) 1944. '' Volcanism and petrogenesis...northern Kavirondo." Rep.. No. 9, Min. geol. Dep. Kenya. 54 pp. THE PETROLOGY OF MAURITIUS 33 M. A |  | | Report (issue) | | More. Also, 877 ft of strata were examined in a mine drift. Inquiries : The number of inquiries has now...of Hydro logical Research Committee on climatic (hill) peat. Dr. W. Bullerwell served on the R.S. Jolin...maintained with Cumberland, Westmorland and West Riding County Councils on the M6 (where the I 11stitt1te carried...M l and Trans-Pennine motorways. Worcestershire County Cou11cil and the Droitwich Developrnent Authority...Reservoir, and the highway engineers of Glamorgan County Council were assisted in their i11vestigations |  | | Journal (article/letter/editorial) | | and Nb from its ores and there are attempts at fluorite and Sc extraction. Seis Lagos (Amazonas Craton)...(Zandkopsdrift, 0.13 Ga), East African rift zone (Mrima Hill and others, 0.11â0.13 Ga), Sino-Korean Shield |  | Mott, A. V., Bird, D. K., Grove, M., Rose, N., Bernstein, S., Mackay, H., Krebs, J. (2013) KARRAT ISFJORD: A NEWLY DISCOVERED PALEOPROTEROZOIC CARBONATITE-SOURCED REE DEPOSIT, CENTRAL WEST GREENLAND. Economic Geology, 108 (6) 1471-1488 doi:10.2113/econgeo.108.6.1471 | Journal (article/letter/editorial) | | characterized by abundant calcite, ankerite, and fluorite (>50% modal), with lesser amounts of grunerite...Carbonate Amphibolite, Fgs = fergusonite, Fl = fluorite, Ilm = ilmenite, LBLC = Light Biotite Layered...unit is composed primarily of calcite, ankerite, fluorite, cummingtonite, grunerite, biotite, 1480 SCIENTIFIC...Carbonate. and magnetite. Calcite, ankerite, and fluorite collectively account for 50 to 90% of the unit...allanite, monazite, fergusonite, and bastnasite. Fluorite and magnetite occur throughout the assemblage |  | 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) | | Earth Element Resources from Ore and Historical Mine Waste in the Eastern Adirondack Highlands, New York...mined in the United States since the Mountain Pass mine, California, was put on care and maintenance at...boulder-sized clasts pulled from the mine and deposited near the mine openings, and tailings piles, which...Library - Acquisitions user REE RESOURCES FROM MINE WASTE, EASTERN ADIRONDACK HIGHLANDS, USA 73°40â...Fisher Hill Cookshaft N Orchard pit Barton Hill gate 6 Barton Hill gate 7 Arch pit Welch pit County pile |  | | Journal (article/letter/editorial) | | provided space for REE precipitation and (2) high ore fluorite and barite contents resulting in high Fâ and SO4...production came entirely from the Mountain Pass mine (California), which provided ~4% of the worldâs...in Brazil [17,18]; Tomtor in Russia [19]; Mrima Hill in Kenya [20]; Mabouni in Gabon; and several other...is 18 km southeast of Zaozhuang City in Weishan County, Shandong Province, within the Luxi tectonic block...brecciated Brecciaed, barite, fluorite, bastnäsite, celestine, fluorite, bastnäsite, stringer, massive |
|
