 | 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...while Ba and Sr are hosted in baryte, celestine, strontianite and witherite. Hydrothermal calcite has a much...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 |  | | 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) | | 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...calcite with ferroan dolomite, fluorapatite and strontianite. The major element evolution in the bulk rocks...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 |  | | 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 |  | 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) | | (L)REE mineral assemblage of synchysite-(Ce), strontianite and baryte. Finally, late-stage Ap-4 is associated...Canada; Huanglongpu and Huayangchuan, China; Lofdal, Namibia; Pivot Creek, New Zealand; and Bear Lodge, USA;...Zircon Pyrochlore Nb-rutile Pyrite Hematite Strontianite Barite Synchysite-(Ce) Parisite-(Ce) Fluorite...Kfsp, K feldspar; syn, synchysite-(Ce) str, strontianite; hm, hematite; rtl, rutile; xnt, xenotime-(Y);...crystal aggregates can reach up to 400 μm. Strontianite and/or baryte also occur in the LREE mineral |  | | 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) | | several minerals including apatite, fluorite, strontianite, and scheelite. Information on the oxidation...Europium is preferentially incorporated into strontianite when it crystallizes together with apatite in...state of europium produces a broad line in the blue region of the color spectrum while the trivalent state...state produces several narrow lines in the red region of the color spectrum. In the light of this knowledge...give a constant energy response for the wavelength region of 400-700 nm. This adjustment has been calibrated |  | | Journal (article/letter/editorial) | | in India [9]; Kangankunde in Malawi [10]; Okorusu in Namibia [11]; Barra do Itapirapuã in Brazil [12];...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...composition containing daughter phases of calcite, strontianite, and alkaline (Na-Ca) carbonates, as well as...investigated the Carbonatites of the Central Tuva region. In this study, we present new data in conjunction |  | Doroshkevich, A. G., Viladkar, S. G., Ripp, G. S., Burtseva, M. V. (2009) HYDROTHERMAL REE MINERALIZATION IN THE AMBA DONGAR CARBONATITE COMPLEX, GUJARAT, INDIA. The Canadian Mineralogist, 47 (5) 1105-1116 doi:10.3749/canmin.47.5.1105 | Journal (article/letter/editorial) | | mineral association of quartz, florencite-(Ce), strontianite, barite and sparse bastnäsite – parisite – synchysite...primaires. L’association de quartz, florencite-(Ce), strontianite, barite et bastnäsite – parisite – synchysite...and parisite-(Ce)], florencite(Ce), barite, strontianite and columbite. In addition to our presentation...carbonatitic magma at Amba Dongar. Quartz, fluorite, strontianite, barite, florencite-(Ce), bastnäsite-(Ce), parisite-(Ce)...mona- Fig. 2. Association of barite (Brt), strontianite (Str), florencite-(Ce) (Fln) and quartz (Q) |  | | Journal (article/letter/editorial) | | Except for one complex analyzed for comparison (Okorusu), all other complexes contain ¯uorapatite of magmatic...with the Damaraland magmatic province in northern Namibia (e.g., le Roex and Lanyon 1998). The samples were...intimately intergrown with strontianite. The texture of these ¯uorapatite±strontianite intergrowths indicates...located close to the Kalkfeld complex in northern Namibia. Again, a suite of carbonatitic rocks and associated...this late-stage ¯uorapatite is intergrown with strontianite on the micrometer scale. The remaining sample |  | | 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) | | precipitated an assemblage of anhedral crystals: strontianite, carbocernaite, barytocalcite, barite and norsethite...enclosed within apatite (Fig. 3b). Crystals of strontianite, monazite-(Ce) and barite often occur in close...carbonatite. Anhedral patches of ancylite and strontianite occur within dolomite crystals (a) and along...Sr by Ca so that a marked rim is visible in strontianite to the right of image (d). Strontium-, REE-rich...apatite; dol, dolomite; srp, serpentine; str, strontianite; ph, phlogopite. detected within the dolomite |  | Kozlov, Evgeniy, Fomina, Ekaterina, Sidorov, Mikhail, Shilovskikh, Vladimir, Bocharov, Vladimir, Chernyavsky, Alexey, Huber, Miłosz (2020) The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry. Minerals, 10 (1) 73 doi:10.3390/min10010073 | Journal (article/letter/editorial) | | ancylite and baryte and, to a lesser extent, strontianite, bastnäsite, and synchysite. Varieties of carbonatite...quartz-bastnäsite matrixes were formed. Simultaneously, strontianite, quartz, calcite, monazite, HREE-rich thorite...(e.g., [74–76]). Importantly, Mongolia [52,53], Namibia New Zealand Norway [58], Russia [59–64], South...Vuoriyarvi alkaline-ultrabasic carbonatite massif (Kola region, Russia) is one of more than 2. Geological Setting...Vuoriyarvi alkaline-ultrabasic carbonatite massif (Kola region, Russia) is one of more than massif is complex |  | | Journal (article/letter/editorial) | | variety of trapped solids, including calcite, strontianite, nahcolite, and mirabilite. Microthermometry...complex: the Bond zone. the Manny zone, and the Mine (Fig. I963 1964 I. M. Samson. sIIIIlalnoite...Sciences of McGill University. Samples from the Mine were collected from open pit walls and from spoil...samples which probably came from the underground mine and whose exact locations are not known. There is...there has been no localized tilting within the region (Foster and Symons, 1979). Thin sections were prepared |  | Amores-Casals, , Melgarejo, , Bambi, , Gonçalves, , Morais, , Manuel, , Neto, , Costanzo, , Molist, (2019) Lamprophyre-Carbonatite Magma Mingling and Subsolidus Processes as Key Controls on Critical Element Concentration in Carbonatites—The Bonga Complex (Angola) Minerals, 9 (10) 601 doi:10.3390/min9100601 | Journal (article/letter/editorial) | | the Atlantic, forming part of the Parana-Angola-Namibia alkaline province [78–80]. The Lucapa extensional...associated with late dolomite, ankerite and strontianite; type V and late quartz are very scarce. During...association formed by dolomite, ankerite, quartz, strontianite and REE carbonates strongly replaces the outer...contents), strontianite (Str) zoned augite, zoned phlogopite Fe, Nbphlogopite contents), strontianite filling...carbonatite complexes belonging to the Paraná-Angola-Namibia carbonatite province, Minerals 2019, 9, 601 |  | | 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 |  | | Journal (article/letter/editorial) | | responsible for the formation of related Sr (strontianite) ore deposit (Bulnaev 1997; Ripp et al. 1998)...Hydrothermal minerals related to carbonatites are strontianite, aragonite, calcite and baryte. In some places...disseminations and areas of hydrothermally altered rocks. Strontianite, aragonite, calcite, baryte and allanite are...mineralization Strontianite, calcite, aragonite, baryte and celestine are hydrothermal minerals. Strontianite is...Magnetite Zircon Monazite Pyrochlore Dolomite Strontianite Aragonite and 5.7), SO3 and Cl. The composition |  | | 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 |  | Trofanenko, J., Williams-Jones, A. E., Simandl, G. J., Migdisov, A. A. (2016) The Nature and Origin of the REE Mineralization in the Wicheeda Carbonatite, British Columbia, Canada. Economic Geology, 111 (1) 199-223 doi:10.2113/econgeo.111.1.199 | Journal (article/letter/editorial) | | Calcite Cordylite-(Ce) Dolomite Parisite-(Ce) Strontianite Synchysite-(Ce) Anc Ank Bsn Bur Cal Cor Dol...potassium feldspar 0.5 mm in width and a trace of strontianite (crystals up to 100 μm in diameter) are common...exsolved from the REE-bearing Kalkfeld carbonatite, Namibia, contained equal weight proportions of CO2 and...reached a similar conclusion for the Okorusu carbonatite, Namibia. We have therefore modeled the data...very fine grained aggregates of calcite and strontianite, in which monazite-(Ce) was the earliest phase |  | Walter, Benjamin F., Steele-MacInnis, Matthew, Giebel, R. Johannes, Marks, Michael A.W., Markl, Gregor (2020) Complex carbonate-sulfate brines in fluid inclusions from carbonatites: Estimating compositions in the system H2O-Na-K-CO3-SO4-Cl. Geochimica et Cosmochimica Acta, 277. 224-242 doi:10.1016/j.gca.2020.03.030 | Journal (article/letter/editorial) | | quartz from the country rocks at Kalkfeld and Okorusu (Namibia; Bühn and Rankin, 1999; Bühn et al., 2002)...include carbonates, such as calcite, trona, and strontianite, REE-rich phases (bastnäsite, burbankite),...fluid inclusions in pyroxenes from the Guide Copper Mine, a satellite intrusion of the Palabora igneous complex...fluorite: fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chem. Geol. 186, 75–98. Bühn B....High-pressure DTA study of the upper three-phase region in the system Na2CO3-H2O. Am. Mineral. 75(5–6) |  | | Journal (issue) | | localities like the Sweet Horne mine, Breckenridge, Mount Antero, the Sunnyside mine, Creede, Cripple Creek,...Collection" labels list the name of the lade or mine, the mining district and county, and the assay results...thread, some taken from the surface of the American mine and some from its deepest workings indicating that...that depth does not change the character of the mine. One is impressed by the money as well as the scientific...quartz, interspersed with gold, but the owner of the mine, Mr. Walker, seeing the cabinet, said that the piece |  | | Journal (article/letter/editorial) | | inclusions suggest that they comprise, calcite, strontianite, ankerite, arcanite (K2SO4), albite, K-feldspar...dominant peak for Ca or Sr, are calcite and strontianite, respectively. Ankerite, represented by a large...greenish solid in LVMS inclusions is likely strontianite, which is the only mineral among those identified...small (b1-Am diameter) Sr-rich solid, probably strontianite. This indicates that some of the inclusions...solids, like albite, K-feldspar, calcite, and strontianite, respectively. How- A.E. Williams-Jones, D |  | | Book (edition) | | localities as inclusions in the limestone”’ (italics mine). Actually, the first published description of...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted...constituents of some of the massifs in the Meimecha-Kotui region of northern Siberia. ALKALIC CARBONATITIC COMPLEXES...Mountain, Mrima Hill, Rangwa, Spitskop. In the Tuva Region, U.S.S.R., some carbonatitic complexes contain... Ontario, Bukusu and Budeda, Uganda, and Okorusu, South-West Africa); see Fig. 2-12. In this |  | | Journal (issue) | | refuse a challenge, descending into the earth in old mine workings. This was followed by many hours reading...with you and, as you might have guessed, most of mine have a mineral flavour .. • • • • • I remember...underground, but she went down into an underground mine at Trevinnick in Cornwall. Dorothy was suitably...Dorothy had a micro agardite-(Y) from Marke Valley Mine, Linkinhorne, Cornwall featured as one of SMLS mineral...His travels took him all over Scandinavia, at one mine in the far north of Norway he even had to have his |  | | Journal (article/letter/editorial) | | Simonetti, 1996; Zaitsev and Keller, in press), Okorusu in Namibia (Le Roex and Lanyon, 1998), Lower Sayan in...composition of carbonate (in the absence of calcite-strontianite exsolution), inward pattern of crystal growth...of primitive alkali-ultramafic rocks across the region, and the mineralogy of upper-mantle and lowercrust...(Eds.), Phoscorites and carbonatites from mantle to mine: the key example of the Kola Alkaline Province....K.B., 1996. Strontianite carbonatites of the Khalyuta deposit (western Transbaikal region, Russia). Geol |
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