 | | 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...2.2.3.7 Pistelwitz pegmatites 2.2.4 Sandamap - Erongo pegmatite belt 2.2.4.1 Gossow pegmatites 2.2.4...4.8 Davib South 2.2.4.9 Brabant (van der Made, Erongo Schlucht) pegmatite 2.2.4.10 Okawayo pegmatites |  | | Book | | Twyfelfontein 7 AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree ...station Garub near Aus Nature conservation, Erongo 16 Welwitschia, Goboboseb Mountains 17 ....Northwest Region including Damaraland The Central Namib Desertand Escarpment The Spitzkoppen The Erongo Mountains...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 |  | | Report (issue) | | MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY NAMIBIA I 1990 Open File Report MRS 05 2 Abstract A...wide variety of semi-precious stones occur in Namibia, namely amazonite, the beryl varieties, chrysocolla...the most important semi-precious stones found in Namibia. The major deposits of these semi-precious stones...Introduction Since the German colonial period Namibia has been well known for the occurrence of semiprecious...throughout Namibia. 1. AMAZONITE The most important occurrences of amazonite in Namibia are those in |  | | Field Trip Notes | | the Geological Society & Geological Survey of Namibia II I -Ā· --Ā· ...... ----Ā·----, Editor: M. Niall...the Geological Society & Geological Survey of Namibia -- - -- .. --- ----ā¢ ā¢ Ā·- ā¢ā¢ -1 Ā· ~. ,. :...DAMARA OROGEN G.LC. Schneider Geological Survey or Namibia, P O Box 2168, Windhoek 1.0 Day 1 - Monday, 22...Windhoek - Otjihase Mine 1.2 08:00 - 12:00 Otjihase Mine 1.3 12:00 - 12:30 Otjihase Mine - Windhoek 1.4 12:30-...16:00 Windhoek-Karibib 1.6 16:00 - 17:00 Capra Hill Marble Quarry 1.8 Overnight: Karibib 3 4 7 7 7 8 9 |  | | 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 |  | | Report (issue) | | Wet Shaft, Tsumeb mine (photograph by Dr Gabi Schneider, Geological Survey of Namibia) MINISTRY OF MINES...GEOLOGICAL SURVEY OF NAMIBIA Director: B.G. Ho al BULLETIN 1 Type mineralogy of Namibia by Vaughan C. Daltry...the Geological Survey P.O. Box 2168, Windhoek, Namibia Price Local (+GST) Abroad (Post Free) R20.00 R25... ______ ........ Abstract The type mineralogy of Namibia is reviewed. One hundred and thirty-nine (139)...Twenty-three (23) unnamed phases are also listed. Namibia ranks second to Zaire as the most productive African |  | | Journal (article/letter/editorial) | | Lincoln] at 19:55 09 April 2015 Apatite LOCALITIES Figure 1. Apatite, back row (from left) 7.06, 6.20...report on every locality that has ever produced apatite gemstones. 260 ROCKS & MINERALS Although no hard...localities are added where warranted. documented apatite gemstones in the GIA Museumās collection are recorded...about parcels of āgreenish blue to bluish greenā apatite they had observed at the Tucson Show that year...with the name ParaĆba, either labeled āParaĆba apatiteā or simply as āParaĆba.ā The same article (p. 161) |  | | Journal (article/letter/editorial) | | K-Ca decay branch. Lepidolite of the Rubikon pegmatite, Namibia, was dated with Rb-Sr at 504.7 Ā± 4.2...2 Ma and the phlogopite and apatite from the Phalaborwa carbonatite complex, South Africa, yielded a Rb-Sr... 45%), apatite (ca. 35%), diopside (ca. 14%), ilmenite (ca. 5%) and calcite (ca. 1%). Apatite forms both...intergranular boundary spaces (Fig. 2.). Inclusions of apatite and calcite make it difficult to achieve highly...lepidolite from the Rubikon mine, located within the Karibib pegmatite belt, Namibia. The Rubikon pegmatites intruded |  | | Book | | .,,., ..,,.... w + ..... . Ā·. .... . - Namibia Zauberwelt edler Steine und Kristalle ooa Dieses...Erdgeschichte 8 Zur Geschichte des Bergbaus in Namibia 17 Der Brandberg und die Mineralfunde in seiner...blaue Wunder vom Erongo - Auf Aquamarin-Jagd im Innern Namibias 72 Miarolen im Erongo-Granit- ein Eldorado...110 Auf Turmalinsuche in Namibia Die Demantoide von Tubussis in Zentral-Namibia 112 116 Sodalith von...Zeolithe vom GrootbergpaĆ in Namibia Kamphaugit-(Y) von der Rƶssing-Mine 120 124 126 136 Das Gahnit-Vorkommen |  | | Journal (issue) | | Colorado and Russia. Having trave led oft en in Namibia, I was thrilled to see the recently identified...Mineralien Welt 14(6). p.15) and metanovacekite from the Erongo Complex. (Continues on page 2) Occurrence of Irhtemite...Occurrence of irhtemite and adelite at the Mercur Mine, Tooele Co., Utah; the western hemisph ere's first...specimens. not just the spectacular show pieces. The "Erongo Complexā¢Ā· is huge and you do no t j ust back up...good specime ns do exist. Maybe nex t year ... Namibia had also produced some dioptase specimens from |  | Melcher, Frank, Graupner, Torsten, GƤbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, OberthĆ¼r, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalumā(niobiumātin) mineralisation in African pegmatites and rare metal granites: Constraints from TaāNb oxide mineralogy, geochemistry and UāPb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | Zimbabwe) 4.3.3. Orange River Pegmatite Belt (Namibia, South Africa) AC 4.3.3.1. Radiometric data 4...Radiometric data 4.4.3.2. Mineralogy 4.4.4. Damara Belt (Namibia) 4.4.4.1. Radiometric data 2 ACCEPTED MANUSCRIPT...Alto-Ligonha Province (Mozambique) 5.4.4. Damara Belt (Namibia) 5.4.5. Older Granites (Nigeria) 5.4.6. Madagascar...and the Tantalite Valley pegmatites (southern Namibia). Large compositional variations through Fe-Mn...Nigeria and some pegmatites in the Damara Belt of Namibia. CGM, AC tapiolite, wodginite and ixiolite accommodate |  | | Report (issue) | | crystal weighed 455 kilograms. 2m: The Queen Anne mine in Zimbabwe has produced crystals up to 2 meters...surprise. In 1997, Gary and Mary Freeman began to mine the Orchard pit, a then insignificant pegmatite...nothing more of interest seemed to come out of the region until November 2002, when people from around Mandrosonoro...Madagascar to study some pegmatites in the Betafo region. Observing the exceptional tourmaline rough arriving...(Laurs et al. 2003). A second location in the Deva mine, Paroon Valley, Kunar, Nuristan, Afghanistan has |  | Graupner, T., Melcher, F., GƤbler, H.-E., Sitnikova, M., BrƤtz, H., Bahr, A. (2010) Rare earth element geochemistry of columbite-group minerals: LA-ICP-MS data. Mineralogical Magazine, 74 (4) 691-713 doi:10.1180/minmag.2010.074.4.691 | Journal (article/letter/editorial) | | consideration (e.g. Rongi (Rwanda); Uis (Namibia); Rubikon (Namibia); Hagendorf (Germany)). References are...Homestead pegmatite, Tantalite Valley, Namaqualand, Namibia, Neoproterozoic (Kibaran) in age; (2) the Shori...of minerals incorporating REE (e.g. monazite, apatite, garnet). Badanina et al. (2006) also observed...Western Australia, Australia Volta Grande (Mibra mine), Nazareno, Minas Gerais, Brazil Sao Joao del Rei...tantalite-(Mn) G 14, Nkumua mine, Kanzambi, Shabunda, Kivu, DRC Bionga mine, Shabunda, Kivu, DRC Tanco |  | | Journal (article/letter/editorial) | | out is called saprolite. Examples from the Weiss Mine, Germany, show this transition. There are types...especially for gemstone such as topaz, chrysoberyl, apatite and beryl (only in eluvial deposits) (Mac Leod...landscape shows the well-known Rubikon (Rubicon) Nb/Ta pegmatite in Namibia (Fig. 6f) (Moore, 2000). Episodically...N-S in the area. One of them is made up of the Rubikon pegmatite which extends in NW-SE direction and...USA (80), Volta Grande, Brazil (30), Rubicon, Namibia (60), Manono-Kitolo, DR Kongo (25), Naje, Nepal |  | Novak, M., Cerny, P., Cempirek, J., Srein, V., Filip, J. (2004) FERROTAPIOLITE AS A PSEUDOMORPH OF STIBIOTANTALITE FROM THE LASTOVICKY LEPIDOLITE PEGMATITE, CZECH REPUBLIC; AN EXAMPLE OF HYDROTHERMAL ALTERATION AT CONSTANT Ta/(Ta + Nb) The Canadian Mineralogist, 42 (4) 1117-1128 doi:10.2113/gscanmin.42.4.1117 | Journal (article/letter/editorial) | | metallic Sb (SbLā£), Fe2O3 (FeKā£), Mn3O4 (MnKā£), apatite (CaKā£), pyroxene (CaKā£). The data were reduced...manganotantalite replaced by ferrotantalite from the Rubikon pegmatite, Namibia (Baldwin 1989), in holtite replaced by...from rare-metal pegmatites in South Africa and Namibia. Mineral. Mag. 53, 571-581. BERLEPSCH, P., ARMBRUSTER...(2000): Complexly zoned fibrous tourmaline, Cruzeiro mine, Minas Gerais, Brazil: a record of evolving magmatic |  | | Conference Proceedings (Volume) | | Balakrishnan S., Kooijman E., Schmitt M., Raith M.M.: Apatite and barite preserve initial 87Sr/86Sr isotope ratios:... Symposium 2: Mineralogy, Petrology, Geochemistry 72 2.5 Oxygen isotopes in white mica from the Larderello...contain biotite and/or muscovite, quartz, feldspars, apatite and minor oxides. Rare polycrystalline inclusions...barite (sediments, hydrothermal deposits) and apatite (igneous rocks) generally have near zero Rb/ Sr...mineral apatite (e.g. Tsuboi and Suzuki, 2003). In situ Sr isotope measurements of single apatite grains |  | | Book | | systematically present the geology of each country, region and continent on Earth. Each book aims to provide...(Gariep Belt) cropping out in the western borders of Namibia and South Africa. They were split up in the Mesozoic...concerning the tectonic and geodynamic evolution of this region during the Precambrian. Major tectonometamorphic...tectonostratigraphic domains and structures of the region are presented, together with implications for the... They emphasize the enormous potential of this region in terms of base (Cu, Pb, Zn, Co, Ni), precious |
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