 | 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 |  | 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...galena and cerussite, fluorapatite, cryolite, burbankite, pyrite, fluorite, barite and kyanite (?), amongst |  | | Journal (article/letter/editorial) | | country rocks of the Kalkfeld carbonatite complex, Namibia. The fluid inclusion population provides a unique...of solid phases comprising nahcolite, halite, burbankite, sylvite, fluorocarbonate (rouvilleite ?), cryolite...crust-derived complexes (open) in north central Namibia. their host rock composition (Rankin and Le Bas...Dongar, India; Simonetti and Bell, 1995; Okorusu F deposit, Namibia; Van Zijl, 1962), or for alteration of...encountered at the Kalkfeld carbonatite complex (Namibia), where a volatile- and alkali-rich carbonatitic |  | | 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 |  | 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) | | Canada; Huanglongpu and Huayangchuan, China; Lofdal, Namibia; Pivot Creek, New Zealand; and Bear Lodge, USA;...standard errors derived for each integration. after burbankite (Wall and Mariano, 1996; Zaitsev et al., 2002;...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...Granitoid 3 edge 0.1 Y (ppm) Tundulu 1 10 Okorusu 100 La/Yb Fig. 15. Composition of Songwe fluorite |  | | Journal (article/letter/editorial) | | cores and fluid inclusion-poor rims. Sylvite and burbankite, apatite, pyrite, chalcopyrite and ilmenite are...norsethite, pyrophanite, baddeleyite, zirconolite, burbankite, magnesian siderite and allanite (Fig. 3). The...most common mineral was sylvite but calcite and burbankite were also present, and non-carbonate minerals...sequestered into solid phases. The presence of burbankite (Na,Ca)3(Sr,Ba,Ce)3(CO3)5, indicates that REE...strontium- and barium-bearing carbonates such as burbankite and carbocernaite, present at Jacupiranga, are |  | 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) | | due to the management and staff of the Bayan Obo mine for their hospitality during field work. REFERENCES...Radtek, M., Haller, M., and Knöchel, A., 1999, Burbankite, a (Sr,REE,Na,Ca)-carbonate in fluid inclusions...Fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia: Chemical Geology, v. 186, p. 75–98 |  | 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) | | magnesiocarbonatites are composed of dolomite with burbankite and are rich in REE (up to 2.0 wt. %), Sr (up...(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...Sr(CO3 ) Ancylite-(Ce), Sr(Ce,La)(CO3 )2 (OH)·H2 O Burbankite **, (Na,Ca)3 (Sr,Ba,Ce)3 (CO3 )5 Carbocernaite |  | 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 |  | Chakhmouradian, A. R., Cooper, M. A., Medici, L., Hawthorne, F. C., Adar, F. (2008) FLUORINE-RICH HIBSCHITE FROM SILICOCARBONATITE, AFRIKANDA COMPLEX, RUSSIA: CRYSTAL CHEMISTRY AND CONDITIONS OF CRYSTALLIZATION. The Canadian Mineralogist, 46 (4) 1033-1042 doi:10.3749/canmin.46.4.1033 | Journal (article/letter/editorial) | | refined previously is spessartine from the Henderson mine in Colorado (Smyth et al. 1990). The data presented...characteristic “carbonatitic” phases as nyerereite, burbankite, ancylite-(Ce), rare-earth- and Nb-rich perovskite...hydrothermal Mo mineralization at the Henderson mine (Smyth et al. 1990) and Jaguaruna (Barbanson & Bastos...fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chem. Geol. 186, 75-98. Bühn, B.... In Phoscorites and Carbonatites from Mantle to Mine: the Key Example of the Kola Alkaline Province (F |  | Gwalani, L. G., Rogers, K. A., Demény, A., Groves, D. I., Ramsay, R., Beard, A., Downes, P. J., Eves, A. (2010) The Yungul carbonatite dykes associated with the epithermal fluorite deposit at Speewah, Kimberley, Australia: carbon and oxygen isotope constraints on their origin. Mineralogy and Petrology, 98 (1) 123-141 doi:10.1007/s00710-009-0102-1 | Journal (article/letter/editorial) | | Yungul carbonatite dykes at Speewah in the Kimberley region of Western Australia were emplaced along a north-trending...carbonatites of the Speewah area in the Kimberley region, Western Australia (Fig. 1), located about 110...diamondiferous lamproite diatreme of the Argyle mine (see Jaques et al. 1986). The Yungul carbonatite...Ridge (or Yungul Hill) at Speewah in the Kimberley region showing the location of the Yungul carbonatite...Cretaceous/Tertiary boundary (65 Ma) Okurusu, Namibia Carbonatite and limestone Gwalani et al. (1993) |  | | 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...located close to the Kalkfeld complex in northern Namibia. Again, a suite of carbonatitic rocks and associated...3 wt% by XRD. The Otjisazu complex in central Namibia has a very dierent genetic setting to the previous...veins. The Okorusu carbonatite belongs to the same group of carbonatites in northern Namibia as the Ondurakorume |  | 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) | | Province, China), the Lofdal complex, (north-western Namibia) and Bear Lodge, (USA) show relative HREE enrichment...parisite-(Ce) and aeschynite-(Ce) possibly with magmatic burbankite-(Ce); all these minerals are relatively enriched...Four samples were also collected from the Yuantao mine dump a few km north of the Dashigou open pit (WGS84...quartz-bearing carbonatite deposit in the north Qinling region were attributed by Song et al., (2016) to trapping...fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chemical Geology, 186, 75-98. Cangelosi |  | 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)...and strontianite, REE-rich phases (bastnäsite, burbankite), sulphides (galena, pyrite), sulfates (arcantite...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) |  | Doroshkevich, Anna G., Veksler, Ilya V., Klemd, Reiner, Khromova, Elena A., Izbrodin, Ivan A. (2017) Trace-element composition of minerals and rocks in the Belaya Zima carbonatite complex (Russia): Implications for the mechanisms of magma evolution and carbonatite formation. Lithos, 284. 91-108 doi:10.1016/j.lithos.2017.04.003 | Journal (article/letter/editorial) | | river Zima in the Tulun district of the Irkutsk region in southern Siberia. The Belaya Zima carbonatites...baotite, zirconolite, ancylite-(Ce), minerals of burbankite group, hilairite, fergusonite-(Ce), baddeleyite...strontianite, CE P ancylite-(Ce) and minerals of the burbankite group (Figs. 2g). Magnetite does not show exsolution...minerals. Pyrrhotite, fluorapatite, minerals of the burbankite group, coffinite, thorite, pyrochlore, columbite-(Fe)... accessory ancylite-(Ce) and minerals of the burbankite group. Niobium mostly resides in pyrochlore, |  | Hurai, Vratislav, Paquette, Jean-Louis, Huraiová, Monika, Slobodník, Marek, Hvožďara, Pavel, Siegfried, Peter, Gajdošová, Michaela, Milovská, Stanislava (2017) New insights into the origin of the Evate apatite-iron oxide-carbonate deposit, Northeastern Mozambique, constrained by mineralogy, textures, thermochronometry, and fluid inclusions. Ore Geology Reviews, 80. 1072-1091 doi:10.1016/j.oregeorev.2016.09.017 | Journal (article/letter/editorial) | | Prospecting Services cc, PO Box 24218, Windhoek, Namibia CE P 8 Earth Science Institute, Slovak Academy...Klippe, approximately 50 T km east of the coastal region of the Nampula Province, Mozambique (Fig. 1). The...structure has only one maximum in the first-order region at 1575-1582 cm-1 (G-band), corresponding to symmetric... AC bearing dolomitic carbonatite at Eureka, Namibia (Worley et al. 1995) and together with diamond...nahcolite (Rankin 1977, Nesbitt and Kelly 1977), burbankite, fluorite, cryolite (Bühn et al. 1999), aphthitalite |  | Czuppon, Gy, Ramsay, R. R., Özgenc, I., Demény, A., Gwalani, L. G., Rogers, K., Eves, A., Papp, L., Palcsu, L., Berkesi, M., Downes, P. J. (2014) Stable (H, O, C) and noble-gas (He and Ar) isotopic compositions from calcite and fluorite in the Speewah Dome, Kimberley Region, Western Australia: implications for the conditions of crystallization and evidence for the influence of crustal-mantle fluid mixing. Mineralogy and Petrology, 108 (6) 759-775 doi:10.1007/s00710-014-0333-7 | Journal (article/letter/editorial) | | calcite and fluorite in the Speewah Dome, Kimberley Region, Western Australia: implications for the conditions...At Yungul, in the Speewah area of the Kimberley region in north-western Australia, a spatial association...Fig. 1 Simplified geological map of the Speewah Region showing the sample localities (all of fluorite...also shown diamonds in the nearby Argyle diamond mine (Jaques et al., 1989). This is perhaps direct evidence...the structurally controlled veins in the Speewah region of the East Kimberleys in Western Australia represent |  | 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) | | Carbonates Ancylite-(Ce) Ankerite Bästnasite-(Ce) Burbankite-(Ce) Calcite Cordylite-(Ce) Dolomite Parisite-(Ce)...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...Fluid inclusion evidence from the Okorusu fluorite deposit, Namibia: Chemical Geology, v. 186, p. 79–98 |  | Liu, Shang, Fan, Hong-Rui, Yang, Kui-Feng, Hu, Fang-Fang, Rusk, Brian, Liu, Xuan, Li, Xiao-Chun, Yang, Zhan-Feng, Wang, Qi-Wei, Wang, Kai-Yi (2018) Fenitization in the giant Bayan Obo REE-Nb-Fe deposit: Implication for REE mineralization. Ore Geology Reviews, 94. 290-309 doi:10.1016/j.oregeorev.2018.02.006 | Journal (article/letter/editorial) | | earlier primary REE-bearing 101 minerals, such as burbankite, parisite, synchysite and bastnäsite (Andersen...present 116 around the open pits of the Bayan Obo mine (Tao et al., 1998; Fan et al., 2016). 117 Fenites...City, Inner Mongolia, China. Basement rocks in the region are part 139 of the North China Craton (NCC)...were discovered in the basement rocks of Bayan Obo region Pa ge |8 141 (Wang et al., 2001; Fan et al...are 169 similar to carbonatite dykes in this region, and δ56Fe and δ26Mg stable isotopes 170 are |  | | 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 |  | | Book (edition) | | Linopolis, Brazil, H Page 13: Gold, 35 mm.Eagle's est Mine, California, G Publi!>hed by Grdllit.u.o. Stefanikova43...abbreviated, e.g. canton (Switzerland), vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...by Mobutu, and is now the Katanga administrative region again. The former Kivu province is now divided...United States or of the Upper Silesian historical region in Poland, where the importance of ore-bearing...Rice, Dolores co., both Colorado, at the Questa mine, Taos co., New 1994. Abernathyite K2[(UOJ 2l(AsO_J2]•6HzO |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...Springfield show ( 1995: 582). Madawaska [Faraday] mine near Bow Lake, Hastings County. Some of the world's...property of, the old Madawaska uranium mine (called the Faraday mine before 1964). The mineral assemblage...Cowgill, 1977). LATINAMERICA BRAZIL Jacupiranga mine, Sao Paulo. Among the crystallized minerals in the...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing |  | | Report (issue) | | .B3 Graph showing dates associated with all the mine sites on the U.S. Environmental Protection Agency’s...production, U.S. apparent consumption, and U.S. mine production of antimony from 1900 to 2012............................F2 Graph showing world cobalt mine and refinery production and apparent consumption.....................F2 Graph showing world cobalt mine production from 1950 to 2011......................F4. Pie chart showing percentage of world cobalt mine production in 2011, by country................. |  | | Report (issue) | | Kearns 12. Post-Paleozoic magmatism in Angola and Namibia: A review . . . . . . . . . . . . . . . . . . ...propagation into the southern Tyrrhenian backarc region. . . . . . . . . . . . . . . . . . . . . . . ....Saharan zone, Cameroon volcanic line, Angola and Namibia, and the East African Rift system. This Special...studies of xenoliths from the lower crust in the region are from the Arabian plate, where juvenile Neoproterozoic...al., 2002). The upper felsic crust of the Bayuda region consists of abundant cratonic material reworked |  | | Book | | and quartz (black) which also replaces core. Bigay mine, Lachaux, Auvergne, France ( X 100) ( Geffroy and...oxides and locally much asphaltic material- Mi Vida mine, Monticello district; T emple 1'4ountain, San Rafael...sul£des of Pb, Cu, Zn, Fe, Co, and Ni- Happy Jack mine, White Canyon district; several deposits in the...ells,vorthite at the McDonald mine and hatchettolite at the Woodcox mine, both near Hybla, Ont., and in...lepidolite, notably in the United States at the Harding mine near Dixon, N.Mex. (t\vo varieties- microlite and |
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