 | 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 |  | | Journal (article/letter/editorial) | | interbedded with the Etjo Formation, Northeast Namibia J.S. Marsh Department of Geology, Rhodes University...National Petroleum Corporation of Namibia, PB 13196, Windhoek, Namibia e-mail: roger@namcor.com.na D....sandstones south-southwest of Grootfontein in northeast Namibia. This indicates that the Early Jurassic Karoo flood...sequence extended from Botswana into northeast Namibia at least as far as 18 east and that this may mark...of the Etjo Formation of the Waterberg Plateau, Namibia with the Clarens Formation of the Karoo Sequence |  | | 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 |  | | 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 | | 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) | | anorogenic complexes of Damaraland, northwest Namibia: evidence for crustal contamination and its effect...anorogenic complexes of Damaraland in northwest Namibia have been used to estimate the d18O values of the...crust. Introduction The Damaraland region of northwest Namibia (Fig. 1) contains numerous anorogenic...Spitzkoppe Plutonic Granite Erongo Volcanoplutonic Okorusu Plutonic Cape Cross Plutonic Etaneno Plutonic...76 6 26 60 155 25 637 38 2 10 2.31 0.39 1.17 Okorusu: OKU3 OKU5 Etaneno: ETA1 ETA2 Cape Cross: CCR10 |  | | Journal (issue) | | (Dodecahedron) with Quartz, Erongo Mountains, Namibia, 2.5 x 2.6 x 2.4 cm, Jeff Scovil photo, Alex Schauss...Club. This led to all kinds of field trips in the region, including one of my first trips to collect Herkimer...track, to collect specimens underground at the Kelly mine, famous for exceptional blue-green botryoidal smithsonite...nearby Graphic mine, noted for azurite and malachite crystals, and visit the Blanchard mine to collect fine...included that of Ms. Blanchard at the Blanchard mine, who greeted someone she didn’t know with a shotgun |  | | 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...1. Introduction The Paraná (Brazil)–Etendeka (Namibia) flood volcanic and associated plutonic rocks represent |  | 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 |  | | 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) | | A fluorite specimen from the Number 1 (Minerva) Mine, Cave-in-Rock subdistrict, Illinois-Kentucky fluorspar...............................................G31 Mine Waste Characteristics.........................................................................G36 Mine Closure...........................................a fluorite specimen from the Number 1 (Minerva) Mine, Cave-in-Rock subdistrict, Illinois-Kentucky fluorspar...Selected examples of the chemistry and mineralogy of mine waste generated at fluorspar mines............. |  | Lustrino, Michele, Melluso, Leone, Brotzu, Pietro, Gomes, Celso B., Morbidelli, Lucio, Muzio, Rossana, Ruberti, Excelso, Tassinari, Colombo C.G. (2005) Petrogenesis of the early Cretaceous Valle Chico igneous complex (SE Uruguay): Relationships with Paraná–Etendeka magmatism. Lithos, 82 (3) 407-434 doi:10.1016/j.lithos.2004.07.004 | Journal (article/letter/editorial) | | VC and the coeval Paresis granitoids (Etendeka, Namibia) are evidenced in this paper. The genetic similarities...latites (s.l.) of the Awahab Formation (Etendeka region, Namibia). D 2005 Elsevier B.V. All rights reserved...are located in Angola (Marzoli et al., 1999) and Namibia (Etendeka; Ewart et al., 1998a,b, 2004a,b; Thompson...mostly concentrated in the coastal Etendeka region in Namibia (Marsh et al., 2001; Ewart et al., 2004b)...Brazil, Bolivia, Paraguay, Uruguay, Angola and Namibia (Darbyshire and Fletcher, 1979; Almeida, 1983; |  | | 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 |  | | Journal (article/letter/editorial) | | intrusives with and without associated carbonatite, Namibia B. Bühn a,b,*, R.B. Trumbull c a Institut fur...from the Cretaceous Damaraland igneous province (Namibia), one with and one without associated carbonatite...and contain a cumulate component (nepheline, plagioclase). The Kalkfeld nefoidites (ijolites) and ne-syenites...Ijolite; Nepheline foidite; Nepheline syenite; Namibia * Corresponding author. Instituto de Geociências...Early Cretaceous Damaraland igneous province in Namibia, one of which is associated with carbonatite, while |  | | 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...cause resorption of quartz, K-feldspar, and plagioclase. Such resorption has been documented in nature |  | 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...greenish-brown Fe-chlorite that have replaced plagioclase and pyroxene, respectively. The pink-orange colour |  | | Journal (article/letter/editorial) | | 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...minerals or synthetic crystals: apatite, fluorite, plagioclase, scheelite and strontianite. Spectroradiometric...cathodoluminescence in minerals Plagioclase: 655 Na,_,Ca,AI,+.Si,_,O, Although the plagioclase structure is capable |  | | 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) | | same sample area of a fluorite sample from Okorusu, Namibia showing intensity inversion effects (arrows)...Germany with apatite grains in altered zones of a plagioclase grain. The scanning electron beam in SEM-CL (right)...respectively, results in different sensitivities in the UV region of the spectrum because of the enhanced absorption...study allows spectral analyses also in the near-IR region of the spectrum. In this way, Nd3+ emission could...several related sharp emission lines in the IR region around 880 nm (Fig. 16). Spatial resolution of |  | | Journal (article/letter/editorial) | | Metamorphic rocks, exposed in the vicinity of Yıldızeli region, start at the basement with pelitic schists and...texture. They contain quartz, alkali feldspar and plagioclase with subordinate amounts of biotite and amphibole...REE reveals that most of the samples lie in the region of granitoid-hosted fluorite occurrences from the...fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. – Chem. Geol. 186: 75 – 98. Coniglio...(1990): Fluorite mineralization at Beckermet iron ore mine, Cumbria, north England. – Trans. Instn. Min. Metall |  | | Journal (article/letter/editorial) | | the Grootberg and Wereldsend quartz latites of Namibia, but the much higher Pb contents of the Namibian...Lucchetti et al., 2018). ACCEPTED MANUSCRIPT In Namibia all of the low-Ti silicic units are interpreted...been proposed to be the Messum Complex caldera in Namibia, with the deposits emplaced more than 300 km from...rocks MA from southern Brazil with those from Namibia, and evaluate petrological aspects of other Phanerozoic...rocks of the Botucatu (Brazil) and Twyfelfontein (Namibia) formations, reaching a thickness of 1500 m near |  | | Journal (article/letter/editorial) | | China, the anorogenic ~130 Ma granites of western Namibia, and the 20–15 Ma granites of the Colorado River...Paleoproterozoic or Archean continental crust, in Namibia it was continental rifting and mantle plume activity...rhyolite–quartz latite dikes. Rapakivi texture with plagioclase-mantled alkali feldspar megacrysts occurs in...remelting of newly hybridized lower crust. In Namibia, partial melting of subcontinental lithospheric...Geological Survey of Namibia, P.O. Box 2168, 1 Aviation Rd., Windhoek, Namibia. 0024-4937/$ - see front |  | | Journal (article/letter/editorial) | | correspondingly, the melting of plagioclase-bearing rocks and plagioclase fractionation produce a europium...is caused by the fractionation or melting of plagioclase under reducing conditions. Since these processes...composition to the rare-metal granites of southern Baikal region [35]. The rocks of the Sakhir–Shulutin Massif and...[15]), and in fluorites from the Okorusu carbonatite complex in Namibia [39]. Figure 7 demonstrates the...Ongonites, and Topazites of the Southern Baikal Region,” Petrologiya 7, 147–155 (1999) [Petrology 7, 147–159 |  | | Journal (article/letter/editorial) | | Sr / 86Sr Whole rock (wr), K-feldspar (kf), plagioclase (pl), quartz (q), fluorite (fl). * 2SE represents...with fluorite + white mica + epidote within plagioclase and chlorite + titanite F epidote within biotite...5121 0.5122 Whole rock (wr), K-feldspar (kf), plagioclase (pl), quartz (q), fluorite (fl). na—not analysed...of the São Pedro mine and at the Gravatal thermal station (Fig. 1b). Plagioclase, potassic feldspar...+ 0.65 mm fractions of potassic feldspar and plagioclase were separated with bromoform diluted by acetone |
|
