 | | 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 |  | 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) | | hydrothermal clay minerals (possibly montmorillonite and cookeite; Fig. 2). The ferrotapiolite may volumetrically...specify its P–T–X conditions. The presence of cookeite and clay minerals in pores indicates that ferrotapiolite...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 |  | Graupner, T., Melcher, F., Gäbler, H.-E., Sitnikova, M., Brätz, 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...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...(Tecklenberg) pegmatite, SW of Uis, Cape Cross-Uis belt, Namibia a/b/c columbite-(Fe), tantalite-(Fe), tantalite-(Mn) |  | | Report (issue) | | crystal weighed 455 kilograms. 2m: The Queen Anne mine in Zimbabwe has produced crystals up to 2 meters...evolved members of the columbite-tantalite group, cookeite, tourmaline, lepidolite, topaz, and spessartine...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 |  | | Journal (article/letter/editorial) | | out is called saprolite. Examples from the Weiss Mine, Germany, show this transition. There are types...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...valleys and eventually to a dissected peneplain. The region most closely resembling the valley- and plain- |
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