 | | 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...pegmatites 2.1.1.1 Witkop pegmatite 2.1.1.2 White City pegmatite 2.1.1.3 Homestead pegmatite 2.1.1.4 Lepidolite...Lepidolite pegmatite 2.1.2 Sandfontein - Ramansdrift pegmatites 2 1 3 Aukam-Heigums pegmatites 2.2 Rare metal |  | | 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...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 |  | Baldwin, J. R., Hill, P. G., von Knorring, O., Oliver, G. J. H. (2000) Exotic aluminium phosphates, natromontebrasite, brazilianite, goyazite, gorceixite and crandallite from rare-element pegmatites in Namibia. Mineralogical Magazine, 64 (6) 1147-1164 doi:10.1180/002646100549940 | Journal (article/letter/editorial) | | and crandallite from rare-element pegmatites in Namibia J. R. BALDWIN1,*, P. G. HILL2, O. VON KNORRING3...rare-element pegmatites from the KaribibUsakos area, Namibia, have been investigated using the electron microprobe...F) is reported from the Daheim pegmatite. In the Okatjimukuju pegmatite, montebrasite has been replaced...post-magmatic fluids in these pegmatites. K EY WORDS : Namibia, exotic aluminium phosphates, lithium pegmatites...common in most of the Li pegmatites in the Karibib area, Namibia, and in many instances they are the only |  | | Report (issue) | | MINISTRY OF MINES Al'TD ENERGY GEOLOGICAL SURVEY NAMIBIA -jl i 1990 ,.1 Open File Report :MRS 09 -~I...MINISTRY OF MINES AND ENERGY GEOLOGICAL SURVEY NAMIBIA 1990 Open File Report MRS 09 2 Abstract A number...number of fluorite deposits occur in Namibia. These belong to the replacement-, vein- and breccia pipe...distributed in various types of deposits throughout Namibia (Figure 1), only a few have so far been exploited...entire body. Limited exploration executed during 1956-57 has indicated reserves of 2.7 M t of fluorite with |  | | 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 |  | | Book | | triangular agate, polygonal umgrentzte Achate (Ger.), pegmatite agates, quasicrystals, angle-plated quartz, Zwickelfülling...seen in aragonite (light and dark orange). (A þ D) Region A exhibiting polycrystalline calcite within the...calcite overgrowth crystal in the inset. (B þ E) Region B with a crack running through the crystal with...observed in the outer parts of the fracture. (C þ F) Region C shows calcite crystals (light blue color) extending...orientation of the reaction front in that particular region. The crystallographic directionality of the apatite |  | | Book | | VULCANICITY AND CONTINENTAL EVOLUTION IN THE BARBERTON REGION, TRANSVAAL 27 M. J. Viljoen and R. P. Viljoen... particularly the Ivory Coast, the Upper Volta region, Mali, Senegal, Mauritania and, perhaps, southern...ages of 1850-2050 m.y. have been obtained for pegmatite minerals (Cahen, 1961, p. 546; Cahen and Snelling...Orogenic Episode is older than 1900+ 100 my. The region of the largely metasedimentary Buganda-Toro sequence...Kasai region, a belt of folding affects the Lukoshi Formation (Fig. 2); muscovite from a pegmatite cutting |  | | Report (issue) | | formed in the Supai Group rocks of the Grand Canyon region in Arizona, an occurrence with which the author...Santa Barbara Permian Supal Group Grand Canyon Region Arizona Trlassic Lower Triassic Buntsandsteln...Watahomlgl and Manakacha Formations, Grand Canyon region, Arizona Upper Missiaslppian Southern Illinois... Reykjanes geothermal area, Iceland Dernburg pegmatite Karibib, S.W. Africa Formation Locality "post-glacial"...glass, plagioclase, montmorillonite, chlorite beryl, albite, Li-bearing mica, amblygonlte, tantalite |  | | Book (chapter) | | triangular agate, polygonal umgrentzte Achate (Ger.), pegmatite agates, quasicrystals, angle-plated quartz, Zwickelfülling...seen in aragonite (light and dark orange). (A þ D) Region A exhibiting polycrystalline calcite within the...calcite overgrowth crystal in the inset. (B þ E) Region B with a crack running through the crystal with...observed in the outer parts of the fracture. (C þ F) Region C shows calcite crystals (light blue color) extending...orientation of the reaction front in that particular region. The crystallographic directionality of the apatite |  | | Journal (volume) | | Mn-rich naujakasite, manganonaujakasite, in a pegmatite from the Lovozero complex of the Kola Peninsula...surprise that rinkite-looking crystals in a naujaite pegmatite were found to be hiortdahlite (the paper by E...and tugtupite, whereas common Be minerals such as beryl, euclase and chrysoberyl are absent. The paper by...zone Aegirine lujavrite Kakortokite and marginal pegmatite Naujaite Sodalite foyaite Naajakasik Søndre Siorarsuit...rated from the augite syenite rim by a marginal pegmatite zone (cf. Bohse et al. 1971; Bohse & Andersen |
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