 | | Report (issue) | | MINISTRY OF MINES Al'TD ENERGY GEOLOGICAL SURVEY NAMIBIA -jl i 1990 ,.1 Open File Report :MRS 09 -~I...MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY NAMIBIA 1990 Open File Report MRS 09 2 Abstract A number...number of fluorite deposits occur in Namibia. These belong to the replacement-, vein- and breccia pipe...one is at Okorusu Fluorite Mine, a replacement-type deposit that is associated with the Okorusu Alkaline...56% CaF2. With the exception of the Garub Fluorite Mine, a breccia pipe deposit, all other fluorite occurrences |  | 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 |  | | Journal (article/letter/editorial) | | carbonatite-related fluorspar ore deposits are located at Okorusu (Namibia), Amba Dongar (India), and Mato Preto (Brazil)...in the form of apatite. In the beneficiation products from those ore deposits, apatite occurs as free...particles locked with fluorite. The presence of apatite in fluorite concentrates may contribute significant...karbonatitischen Fluoritlagerst~itten sind Okoruso (Namibia), Amba Dongar (Indien) und Mato Preto (Brasilien)...Currently fluorspar deposits are mined at Okorusu (Namibia), A m b a Dongar (India), and Mato Preto (Brazil) |  | | Journal (issue) | | Westcott copper mine, comprised three separate collecting sites in two short adits and the mine dump. Nearby...Nearby was the Badger Level section of the Huglith mine complex, which was our other location. We were too...a layby in the forestry surrounding the Huglith mine. When we did so later in the day there were some...more interesting of the. sites at the •Westcott mine, though a few good finds were made in the two ad...• • •, :. • I Originally started as a copper mine in the latter part of the 1800s, the workin·gs at |  | | 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 |  | | Catalog/List | | it collected when the Tsumeb Mine (as well as other mines of the region) were still in production in...engineering work took him to the Tsumeb Mine in Namibia. This mine is renowned for producing what are arguably...desert-like "Sperrgebiet" area of the southern coast of Namibia, with its fabulous wealth of gem diamonds. One...Ian’s interest stems from the family trips to Namibia, including the mines of Tsumeb. He worked with... 57001 Azurite Level 8, Tsumeb Mine, Tsumeb, Otjikoto Region, Namibia If the attachment point on the |  | | 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...substantial resources of W, Sn, REE, U-Th and phosphate (apatite), and potential exists for Ni-Cu, PGE and gold |  | | 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 |  | Bühn, B., Rankin, A.H., Schneider, J., Dulski, P. (2002) The nature of orthomagmatic, carbonatitic fluids precipitating REE,Sr-rich fluorite: fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chemical Geology, 186 (1) 75-98 doi:10.1016/s0009-2541(01)00421-1 | Journal (article/letter/editorial) | | luid-inclusion evidence from the Okorusu f luorite deposit, Namibia B. Bühn a,*, A.H. Rankin b, J. Schneider...March 2001; accepted 7 December 2001 Abstract The Okorusu fluorite deposit occurs in Pan-African carbonaceous...northern Namibia. The epigenetic mineralization formed from fluids expelled from the Cretaceous Okorusu carbonatite...70458 – 0.70459, which are close to those of the Okorusu carbonatite. Primary and secondary aqueous fluid...than recorded for the fluorites and associated Okorusu carbonatite. Crush analysis of the bulk quartz |  | | 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 |  | Bühn, B, Schneider, J, Dulski, P, Rankin, A.H (2003) Fluid–rock interaction during progressive migration of carbonatitic fluids, derived from small-scale trace element and Sr, Pb isotope distribution in hydrothermal fluorite. Geochimica et Cosmochimica Acta, 67 (23) 4577-4595 doi:10.1016/s0016-7037(03)00392-2 | Journal (article/letter/editorial) | | Abstract—Associated with the Cretaceous Okorusu carbonatite complex (Namibia) is a hydrothermal fluorite mineralization...Bühn et al. Fig. 1. Geology of the Okorusu carbonatite complex, Namibia (after Van Zijl, 1962). modification...country rock marbles of the Cretaceous Okorusu carbonatite complex, Namibia. Here, vein-type fluorite mineralization...magmatic activity in the Damaraland igneous province, Namibia, lasted from ⬃137 to 124 Ma, and is thought to...metaluminous silicate rocks and peralkaline granite. The Okorusu carbonatite complex consists of alkaline silicate |  | | 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) | | magmas: implications from natural carbonatites, Namibia B. Bühn Instituto de Geoci^encias, University... Summary Two bimodal carbonatite complexes in Namibia of Cretaceous age are explored as to the presence...clinopyroxene, perovskite= titanite, melanite, calcite, apatite, spinel and wollastonite (Hamilton and Kjarsgaard...geochemical evolution of low-Si carbonatite bodies in Namibia, and addresses the response of carbonatite compositions...Kalkfeld and Ondurakorume carbonatites in northern Namibia, which are part of the Cretaceous Damaraland Igneous |  | | Catalog/List | | ◄-S~~----- 1 CHRYSOBERYL, Espirito Santo, Southeast Region, Brazll. Sixling twinned crystal. 38x30x19mm. ...locality. 53x42x13mm. £38 3 VESUVIANITE, Jeffrey Mine, Richmond County, Quebec, Canada. Apple green crystals..., . ·~, ~- .. ,;. _,,\ 4 EPIOOTE, Xichang Mine, Sichuan Province, China. Attractive gemmy olive...sulphide xtls. 55x48x34mm £28 6 APATITE, C-Francolite"), Simm's Lode, Geevor Mine, St Just, Cornwall. Gemmy...mineral. 102x74x5.5mm. £32 10 FLUORITE, Okorusu Mine, Erongo, Namibia. Attractive purple green cubes to 30mm |  | | Journal (article/letter/editorial) | | minerals, particularly certain species from Tsumeb in Namibia and the Kalahari manganese field in South Africa...shown here for the first time. Examples are from Namibia, South Africa, Zimbabwe, and Tanzania. All the... Reproduced with permission Reproduced with permission Namibia Reproduced with permission Reproduced with permission...Blue willemite and white dolomite, 6.5 cm, Tsumeb mine. The blue willemite fluoresces bright yellow, and...the UV source; Tsumeb mine. Field of view is 2.2 cm. Figure 3. The Skorpion mine is located close to the |  | | 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, |  | 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) | | carbonatite, Malawi: HREE-enrichment in late-stage apatite Sam Broom-Fendley a,b,⁎, Aoife E. Brady c,1, Frances...2016 Available online 24 October 2016 Keywords: Apatite Carbonatite Rare earth elements Heavy rare earth...heavy (H)REE concentration of any carbonatite apatite described so far. A combination of this fluorapatite...particularly important to understand. Multiple apatite crystallisation stages have been differentiated...types (Ap-0–4). While Ap-0 and Ap-1 are typical of apatite found in fenite and calcite-carbonatite, Ap-2, |  | | Journal (article/letter/editorial) | | small-scale REE mineralisation at the Okorusu carbonatite, Namibia, demonstrating that the formation of...principal ore mineral for Nb, associated with apatite in clasts from the Good Hope carbonatite, Canada...texture of these clasts, the authors suggest the apatite and pyrochlore did not form from the same melt...of two different magmas. The occurrence of the apatite-pyrochlore rocks in clasts is an attractive indication...exist at depth in this complex. Given that both apatite and pyrochlore are minerals of economic interest |  | 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...Fenites 247 Cross-cutting vein textures and zoned apatite crystals (see Fig. 5A and 5B) ob- 248 served...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 |  | | Journal (article/letter/editorial) | | carbonatite complexes are commercially mined for apatite (P), fluorite (F), barium, and strontium. They...in India [9]; Kangankunde in Malawi [10]; Okorusu in Namibia [11]; Barra do Itapirapuã in Brazil [12];...alkaline syenites, shonkinites, and magnetite–apatite rocks, as well as several small dikes of fine-grained...Two independent stocks of ore-bearing apatite and magnetite–apatite rocks are present in the area (Figure...(Figure 1d). The age of the magnetite–apatite rocks is estimated to be within the range of 138-121 Ma [49] |  | | Report (issue) | | sulfides, cassiterite, topaz, wolframite, scheelite, apatite. Distribution: Notable occurrences include: in...Switzerland. From Wölsendorf, Bavaria, and in the Clara Mine, near Oberwolfach, Black Forest, Germany. Around...Berbes, Asturias Province, Spain. At the Nikolaev mine, Dal’negorsk, Russia. From Kara Oba, Kazakhstan...Naica, Chihuahua; Musquiz, Coahuila; and the Ojuela mine, Mapimı́, Durango. In the USA, from Macomb, St....Illinois; at the Elmwood mine, Smith Co., Tennessee; in the Sunnyside mine, San Juan Co., Colorado; from |  | | Journal (article/letter/editorial) | | Pan‑African lithospheric mantle beneath the Damara Belt, Namibia, by the Tristan mantle plume: geochemical evidence...mantle and variably enriched mantle beneath this region. Clinopyroxenes showing geochemical depletion have...continental breakup. Keywords Mantle · Northwest Namibia · Trace elements · Isotopes · Amphibole · Metasomatism...latter process include amphibole, phlogopite, apatite, zircon and clinopyroxene. The role of mantle metasomatism...within the Pan-African Damara belt in northwestern Namibia, provides an excellent opportunity to evaluate |  | | Book | | 21 Metasomatic formation and replacement of apatite (Bamble sector, South Norway) Engvik, AK, Ihlen...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...characterization Hartner, R, Walters, SG, and Berry, R 319 Apatite–biotite–carbonatite (Stjernøy, N-Norway) – potential...oxidation and mobilization of arsenic in the Ketza River mine tailings Paktunc, D, Thibault, Y, and Weisener, |  | | Journal (article/letter/editorial) | | from experimental studies on apatite/¯uid (Ayers and Watson 1993) and apatite/phosphate±¯uoride melt systems...of structural aspects of REE incorporation into apatite have been investigated (Hughes et al. 1991; Fleet...the ``average carbonatitic apatite'' derived from 111 carbonatitic apatite analyses by Fleischer and Altschuler...1995); open squares Oka carbonatite, mean of eight apatite analyses (Eby 1975); open stars Oka carbonatite...Except for one complex analyzed for comparison (Okorusu), all other complexes contain ¯uorapatite of magmatic |
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