 | | Journal (article/letter/editorial) | | 20013 pohwatp@si.edu FLUORITE Part 2 Huanggang Mine, Inner Mongolia, China T he first part of this...northern England, particularly from the Rogerley mine, has made these classic specimens available once...Kèshíkèté Qi County, Inner Mongolia Autonomous Region, China. Limpid complex fluorite crystals displaying...made of the complex crystals from the Trevaunce mine, St. Agnes. The crystals on the Smithsonian specimens...crystals to 2 cm have been recorded.The East Pool mine has produced crystals to 6 cm in colors ranging |  | Cangelosi, Delia, Broom-Fendley, Sam, Banks, David, Morgan, Daniel, Yardley, Bruce (2020) Light rare earth element redistribution during hydrothermal alteration at the Okorusu carbonatite complex, Namibia. Mineralogical Magazine, 84 (1) 49-64 doi:10.1180/mgm.2019.54 | Journal (article/letter/editorial) | | during hydrothermal alteration at the Okorusu carbonatite complex, Namibia Delia Cangelosi a,*, Sam Broom-Fendley...7th May 2019 Abstract The Cretaceous Okorusu carbonatite, Namibia, includes diopside-bearing and pegmatitic...fluorite replaced the calcite carbonatites at Okorusu and resulted in extensive chemical change, suggesting...KEYWORDS: REE, carbonatite, hydrothermal transport, Okorusu. * ee12dac@leeds.ac.uk 1. Introduction The rare...metals’ — metals which are sourced from a restricted region and have low substitutability and recyclability |  | | Report (volume) | | fluorspar have been worked in South Africa and Namibia. Stockworks of fluorspar in granite are mined extensively...reported from Angola, Kenya, Morocco, Mozambique, Namibia, South Africa, Tanzania, and Uganda. Fluorite has...carbonatites have been reported only in the Okorusu district of Namibia. Fluorspar production from Africa through...young rifts in eastern and central Africa, in Namibia (South West Africa), and in Angola and is associated...deposit of Namibia. Stockworks of fluorspar in granite are mined extensively at the Buffalo Mine in South |  | | Book | | Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...s Onganja Mine and Surrounding Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and... Encyclopedia of the Mineralsof Namibia 443 Meteorites in Namibia Bibliography Index Photo credits...__ Republic of Namibia The President State House W°Ntdhoek FOREWORD Namibia is endowed with an...from near and far. Fine mineral specimen from Namibia are displayed in all the famous natural science |  | | Journal (article/letter/editorial) | | resources of anorogenic alkaline complexes in Namibia: A review F. Pirajno a a Geological Survey of...resources of anorogenic alkaline complexes in Namibia: A review, Australian Journal of Earth Sciences:...resources of anorogenic alkaline complexes in Namibia: A review F. PIRAJNO Downloaded by [Dalhousie...Plain Street, East Perth, WA 6004, Australia. In Namibia there are numerous anorogenic alkaline complexes...carbonatites, mineralization, Namibia. INTRODUCTION In southwestern Africa (Namibia, southern Angola and northwestern |  | | Book | | REPUBLIC OF NAMIBIA - MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY THE MINERAL RESOURCES OF NAMIBIA FIRST...ENERGY Of the several hundred minerals present in Namibia, around sixty have been exploited. some, such as...base metals and industrial minerals have helped Namibia rank amongst the top five mining countries in Africa...terms of production and reserves. In this context, Namibia is a major producer of copper, lead, zinc, cadmium...unpublished. It is evident that mineral exploration in Namibia, as elsewhere. has changed from serendipitous discoveries |  | | Journal (article/letter/editorial) | | (Pasero et al., 2019), yet only four (xenotime, monazite, bastnäsite and loparite) are presently processed...incorporation of sulfur into the structure of monazite-group minerals. Sulfur is potentially an important...2016). BroomFendley et al. (2020) demonstrate that monazite accommodates sulfur as sulfate, but can also incorporate...sulfur-bearing monazite formed in a weathering environment. However, sulfur is known to occur in monazite in some...small-scale REE mineralisation at the Okorusu carbonatite, Namibia, demonstrating that the formation of |  | | Journal (issue) | | Sterne und Rosetten • Die Fluorit-Lagerstätte Okorusu in Namibia Die Neufunde aus der Vulkaneifel 2013 • ...Rosetten 41 Neues über die Fluorit-Lagerstätte Okorusu in Namibia 48 Die Jagd auf die grünen Fluorite 62...dieses Foto einer Scheibe vom Vorkommen in Okorusu in Namibia . Wir berichten über Neuigkeiten und Funde...größte zusammenhängende Waldgebiet Deutschlands. Die Region ist Rückzugsgebiet für seltene Tier- und Pflanzenarten...eine Gondel der Materialseilbahn der Sorte-Engel-Mine bei der Siedlung Maarmorilik. Beim Abbau des Marmors |  | | Journal (article/letter/editorial) | | Damaraland Lamprophyres and Carbonatites, Northwestern Namibia: Evidence for Plume–Lithosphere Interactions ANTON...igneous complexes in Damaraland, northwestern Namibia. Lamprophyres, emplaced as late-stage dykes, stocks...WORDS: geochemistry; lamprophyre carbonatite; Namibia; Tristan plume ∗Corresponding author. Telephone:+27-21-650-2921...complexes extend through Damaraland in northwestern Namibia (Fig. 1) and provide an example of the contiguous... 1. Simplified geological map of northwestern Namibia, showing the main outcrop regions of the Etendeka |  | | Book | | .,,., ..,,.... w + ..... . ·. .... . - Namibia Zauberwelt edler Steine und Kristalle ooa Dieses...Erdgeschichte 8 Zur Geschichte des Bergbaus in Namibia 17 Der Brandberg und die Mineralfunde in seiner...110 Auf Turmalinsuche in Namibia Die Demantoide von Tubussis in Zentral-Namibia 112 116 Sodalith von...Zeolithe vom Grootbergpaß in Namibia Kamphaugit-(Y) von der Rössing-Mine 120 124 126 136 Das Gahnit-Vorkommen...Gahnit-Vorkommen von Okahua, Otjiwarongo-Gebiet 140 Tsumeb: ein Name geht um die Welt ... 143 Guchab, |  | | Journal (article/letter/editorial) | | in India [9]; Kangankunde in Malawi [10]; Okorusu in Namibia [11]; Barra do Itapirapuã in Brazil [12];...newly formed hydrothermal ore minerals (e.g., monazite) crystallize [31–37]. Aggressive acidic fluids...except for Fe-Ti oxides: 20 nA and 15 kV, for monazite: 40 nA and 20 kV, for apatite: 10 nA and 20 kV...inclusions in carbonatites of the Central Tuva region is described in [37]. The concentrations of Na...crystal–fluid inclusions in the Western Transbaikalia region were collected from Yuznoe and Arshan REE-carbonatites |  | Broom-Fendley, Sam, Brady, Aoife E., Wall, Frances, Gunn, Gus, Dawes, William (2017) REE minerals at the Songwe Hill carbonatite, Malawi: HREE-enrichment in late-stage apatite. Ore Geology Reviews, 81. 23-41 doi:10.1016/j.oregeorev.2016.10.019 | Journal (article/letter/editorial) | | extracted from carbonatites (REE-fluorocarbonates, monazite) are typically LREE-rich (La–Sm) and HREE-poor...Canada; Huanglongpu and Huayangchuan, China; Lofdal, Namibia; Pivot Creek, New Zealand; and Bear Lodge, USA;...For example, fluorite REE distributions at Okorusu, Namibia, have La/Yb (i.e. degree of HREE enrichment)...fluorite from Daluxiang, Maoniuping, Bayan Obo and Okorusu), as are roof-shaped MREE enriched distributions...silicate melts show that it is more soluble than monazite and solubility increases with increasing NaCl |  | | Journal (article/letter/editorial) | | Gross Spitzkoppe and Klein Spitzkoppe stocks in Namibia: Topaz-bearing A-type granites related to continental...Geological Survey of Namibia, P.O. Box 2168, 1 Aviation Road, Windhoek, Namibia c Rosh Pinab Zinc Corporation...Corporation (Pty) Ltd, P.O. Box 115, Rosh Pinab, Namibia Received 3 February 2006; accepted 4 December...The anorogenic Damaraland intrusive complexes in Namibia belong to the bimodal Paraná–Etendeka Large Igneous...granites with columbite, zircon, magnetite, and monazite as typical heavy accessory minerals. A bimodal |  | Elliott, H.A.L., Wall, F., Chakhmouradian, A.R., Siegfried, P.R., Dahlgren, S., Weatherley, S., Finch, A.A., Marks, M.A.W., Dowman, E., Deady, E. (2018) Fenites associated with carbonatite complexes: A review. Ore Geology Reviews, 93. 38-59 doi:10.1016/j.oregeorev.2017.12.003 | Journal (article/letter/editorial) | | Canada c GeoAfrica, P.O. Box 24218, Windhoek, Namibia d Telemark, Fylkeshuset, Postboks 2163, 3103 Tønsberg...One 268 example of this process is the Okorusu fenite, Namibia, which displays undulating or 269 scalloped...Willem, Namibia (Reid and Cooper, 1992); Toror Hills, Uganda (Sutherland, 1965b) 343 and Okorusu, Namibia...fluids from inclusions at the Okorusu and Kalkfeld 411 carbonatites, Namibia (Bühn et al., 2002). This...importance’, either as a past producer, an active mine or a deposit (i.e. those with 620 a quantified |  | Wall, F., Niku-Paavola, V. N., Storey, C., Muller, A., Jeffries, T. (2008) XENOTIME-(Y) FROM CARBONATITE DYKES AT LOFDAL, NAMIBIA: UNUSUALLY LOW LREE:HREE RATIO IN CARBONATITE, AND THE FIRST DATING OF XENOTIME OVERGROWTHS ON ZIRCON. The Canadian Mineralogist, 46 (4) 861-877 doi:10.3749/canmin.46.4.861 | Journal (article/letter/editorial) | | XENOTIME-(Y) FROM CARBONATITE DYKES AT LOFDAL, NAMIBIA: UNUSUALLY LOW LREE:HREE RATIO IN CARBONATITE,...1, Aviation Road, Private Bag 13297, Windhoek, Namibia Craig STOREY Department of Earth Sciences, University...very rare in carbonatite. Uniquely, at Lofdal, Namibia, xenotime-(Y) occurs in many carbonatite dykes...associated with hematite, and crystals associated with monazite-(Ce) and synchysite-(Ce) in highly oxidized iron-rich...(reaching >6 wt%) and lower Yb (below 4 wt%). A monazite-(Ce) – xenotime-(Y) geothermometer developed for |  | | Book | | relationship to beneficiation problems at Okorusu, Namibia Hagni, RD 297 Ore microscopic study of copper...losses from mining of bornite ores in the Sweetwater Mine, Viburnum Trend, Southeast Missouri Hagni, RD 307...oxidation and mobilization of arsenic in the Ketza River mine tailings Paktunc, D, Thibault, Y, and Weisener,... Understanding micro-environment development in mine tailings using MLA and image analysis Redwan, M...iron-rich sediments of Benavi Area in Kurdistan Region – Northern Iraq Yassin, AT and Mahmoud, MM 781 |  | Cangelosi, Delia, Smith, Martin, Banks, David, Yardley, Bruce (2020) The role of sulfate-rich fluids in heavy rare earth enrichment at the Dashigou carbonatite deposit, Huanglongpu, China. Mineralogical Magazine, 84 (1) 65-80 doi:10.1180/mgm.2019.78 | Journal (article/letter/editorial) | | occur mostly in magmatic REE minerals, mainly monazite-(Ce), and typically have ∑LREE/(HREE+Y) ratios...hydrothermally altered calcite carbonatites, magmatic monazite-(Ce) is partially to fully replaced by HREE-enriched...Province, China), the Lofdal complex, (north-western Namibia) and Bear Lodge, (USA) show relative HREE enrichment...hydrothermal alteration of magmatic REE phases, notably monazite-(Ce), was accompanied by growth of secondary REE...molybdenite yields Re-Os ages from 209 Ma to 221 Ma and monazite-(Ce) U-Pb and Th-Pb ages from 208.9 ± 4.6 Ma and |  | Xu, Cheng, Kynicky, Jindrich, Chakhmouradian, Anton R., Campbell, Ian H., Allen, Charlotte M. (2010) Trace-element modeling of the magmatic evolution of rare-earth-rich carbonatite from the Miaoya deposit, Central China. Lithos, 118 (1) 145-155 doi:10.1016/j.lithos.2010.04.003 | Journal (article/letter/editorial) | | contains abundant REE-rich minerals, including monazite and fluorapatite, both precipitated earlier than...framework and tectonic evolution of the Qinling region are given in Meng and Zhang (2000), Ratschbacher...carbonatites. Symbols: Cal, calcite; Ls, laser spot; Mnz, monazite-(Ce); Ap, fluorapatite; Rt, rutile; Bt, bastnäsite-(Ce);...calcite veining in the syenite (B), development of monazite and fluorapatite prior to primary calcite (D, E)...perovskite, zircon, ferrocolumbite, Nb-rich rutile, monazite-(Ce), bastnäsite-(Ce) and synchysite-(Ce). A few |  | | Journal (article/letter/editorial) | | endoskarn abundance in Cu–Zn skarns at the Empire Mine, Idaho, USA Zhaoshan Changa,*, L.D. Meinertb a ...in some Cu–Zn skarn deposits such as the Empire Mine in Idaho. Important features include: (1) quartz...localities such as the world-class Cu–Zn skarn Antamina mine, as well as some tin and rapakivi granites. D 2004...associated with some ore deposits, such as the Empire Mine, Idaho, USA, contain quartz phenocrysts that are...tin and rare-metals mineralization at the Pitinga mine, Brazil. Embayment of quartz phenocrysts also has |  | | Journal (article/letter/editorial) | | 381-390 ( I 990) Anorogenic granite evolution in Namibia -a fluid contribution PETER BOWDEN, JUDITH A. KINNAIRD...E M Geological Survey, PO Box 2 168, Windhoek, Namibia and FRANC0 PIRAJNO Exploration Geology Division...the Mesozoic anorogenic complexes of northern Namibia. The magmatic lineage of the Damaraland alkaline...stages of cooling and consolidation. KEY WORDS Namibia Damaraland granites Mesozoic mineral-layering...Atlantic can be found in Damaraland, northern Namibia. Following the widespread outpouring of the Karoo |  | Fan, Hong-Rui, Xie, Yi-Han, Wang, Kai-Yi, Tao, Ke-Jie, Wilde, Simon A. (2004) REE Daughter Minerals Trapped in Fluid Inclusions in the Giant Bayan Obo REE-Nb-Fe Deposit, Inner Mongolia, China. International Geology Review, 46 (7) 638-645 doi:10.2747/0020-6814.46.7.638 | Journal (article/letter/editorial) | | (Chao et al., 1992, 1993, 1997). Th-Pb dates from monazite for REE mineralization range from 555 to ~400...altered dolomite marble with bands of apatite, monazite, and bastnaesite. The sample shows alteration...due to the management and staff of the Bayan Obo mine for their hospitality during field work. REFERENCES...Fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia: Chemical Geology, v. 186, p. 75–98...precise 232Th-208Pb chronology of fine grained monazite: Age of the Bayan Obo REE-FeNb ore deposit, China: |  | | Journal (article/letter/editorial) | | somewhat analogous to the modern 114 western Pacific region, dominantly composed of island arcs in the absence...synthesized by Zhao (2004) for the Western Pacific region shows 233 stagnant slabs floating in the mantle...detritus will get stacked in the middle mantle region due 250 to buoyancy, generating a ‘second continent’...Atlantic 457 would explain the origin of LIP in the region (Karoo, Ferrar, Tasman and Chon Aike; 458 Gondwana...underlying superplume in the South Atlantic 462 region, forming the Weddell triple junction. 463 The |  | | Journal (article/letter/editorial) | | magmatism in the Cretaceous Paresis ring complex, Namibia: evidence for mixing of crust and mantle-derived...carbonatites and undersaturated alkaline rocks Že.g., Okorusu, Kalkfeld, Etaneno, Ondurakorume.. Geochemical...the Congo craton and related inliers in northern Namibia. The comendites are peralkaline, highly differentiated...ŽPeate, 1997.. The Damaraland Igneous Province in Namibia is a well-exposed and preserved group of some 20...with respect to other Damaraland complexes in Namibia. 4 B. Mingram et al.r Lithos 54 (2000) 1–22 |  | | Report (issue) | | SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time on a small...occurrences of niobium-tantalum mineralisation in Namibia are classified and described according to their...pegmatites occur in the Karibib area, central Namibia. Uranium mineralised alaskites carrying accessory |  | | Report (issue) | | was also suggested that limestone at Kalkfeld, Okorusu, Phalaborwa, Lokupoi Hill (Napak), Toror, and Tororo...Libya Malawi Mali Mauritania Morocco Mozambique Namibia Somalia South Africa Sudan Tanzania Uganda Zambia...beneficiated from carbonatite, including bastnäsite, monazite, apatite, pyrochlore, magnetite, fluorite, vermiculite...section it is noted if the carbonatite hosts an active mine, is a past-producer, or is considered a “deposit”...on the 330 occurrences then compiled. The only region significantly underrepresented in that compilation |
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