 | | Report (issue) | | SURVEY NAMIBIA 1990 Open File Report MRS 12 2 Abstract Niobium-tantalum mineralisation in Namibia occurs...niobium-tantalum pentoxides of the columbite-tantalite series, or as niobium-tantalum minerals of the...pyrochlore group. Minerals of the columbite-tantalite series are associated with rare metal pegmatites...by-products of Tin-mining operations in central Namibia (Uis, Nainais, De Rust). Prominent niobium-tantalum...mineralised pegmatites occur in the Tantalite Valley in southern Namibia and have been mined for a long time |  | | Thesis/Dissertation | | regular NYF-type pegmatites from the Namaqualand pegmatite belt, Northern Cape, South Africa by Minenhle...40-50 km wide Namaqualand pegmatite belt, synonymous with the Orange River pegmatite belt (ORPB), consists...as mineralised, herewith referred to as complex (Witkop, Koegab, Sidi-Barrani) and regular, referred to...crystals and consists of the Witkop, Koegab and Sidi-Barrani pegmatite-1 complex pegmatites which were...our findings demonstrate the possibility of the pegmatite groups being derived from different sources, which |  | Ballouard, Christophe, Elburg, Marlina A., Tappe, Sebastian, Reinke, Christian, Ueckermann, Henriette, Doggart, Shane (2020) Magmatic-hydrothermal evolution of rare metal pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Ore Geology Reviews, 116. 103252 doi:10.1016/j.oregeorev.2019.103252 | Journal (article/letter/editorial) | | pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Christophe Ballouard...pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa), Ore Geology...pegmatites from the Mesoproterozoic Orange River pegmatite belt (Namaqualand, South Africa) Authors: Christophe...geochronology Abstract The 450 km long Orange River pegmatite belt intruded the Namaqua Sector of the Mesoproterozoic...Kokerboomrand I pegmatite emplaced at ca. 985 Ma during the main stage of pegmatite emplacement in the |  | | Book | | Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275... 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 |  | | 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) | | AND H.F.J. THEART 341 The exploitability of pegmatite deposits in the lower Orange River area (Vioolsdrif...Geological Society of South Africa ABSTRACT The pegmatite deposits situated in the centre of a triangular...Orange River region constitute the westernmost extension of the Northern Cape pegmatite belt. Aspects...geology, and the economic viability of these pegmatite deposits are considered here. Current ore deposit...economic mineral constituents, occurring in the pegmatite body, could only be considered when more information |  | | Report (issue) | | William "Skip" Simmons and Alexander Falster, pegmatite specialists from the University of New Orleans...pegmatites. Most ore beryl occurs in massive pegmatite zones where crystals may reach considerable size...can be found adjacent to the core margin of the pegmatite and in Suggested Chromophores for Beryl Color-generating...the world's largest known beryl crystal is a pegmatite at Malakialina, Madagascar, which produced one...the giant-sized crystals found in the massive pegmatite portions. Morphology Beryl crystals are hexagonal |  | | Book (edition) | | chapter controversial several new chapters, one on Pegmatite Deposits has been introduced to avoid repeating...eeure bes: 138 Sections through the Valentine and East O’okiep ore-bodies...... a onA a Sn ES MS AO Be...agriculture. Rapid expansion east and west of the Central Witwatersrand outcrop region took place. After the... and later by the smaller Evander field located east of Springs. Shortly thereafter the Elsburg Reefs...ire eoss UNickelit tiene. iets atin eo seaae's Tantalite (concentrates) kg Tin: Metal ere aceite sed eee |  | | Book (edition) | | 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...byssolite. Mono- coast of North America: Kobuk River Valley, Alaska, clinic, C2/m, a,b,c = 9.89, 18.20, 5.31...e.g. on Grossgreiner Mt., overlooking Zillertal Valley, Tirol, Austria, and at Passo di Vizze, Trentino-Alto |
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