 | | Journal (article/letter/editorial) | | 15:29 06 November 2014 Spessartine Marienfluss, Northern Namibia I n a recent issue of this magazine...end, a fine spessartine specimen from Marienfluss, northern Namibia, has been chosen. Spessartine, because...spessartine crystal on matrix from Marienfluss, northern Namibia. Houston Museum of Nature and Science...commonly associated minerals are beryl, apatite, albite, muscovite, potassic feldspar, and quartz in the...spessartine masses to 2 cm across occur in blocky albite in the Keith quarry at Auburn, Maine. Analyses |  | | 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...Complex and sodalite is a constituent of rocks of the Kunene Anorthosite Complex. The Namibian output of semi-precious...Introduction Since the German colonial period Namibia has been well known for the occurrence of semiprecious |  | | Journal (article/letter/editorial) | | 480-Million-Year-Old Host Rock, T. Moxon, 66–72 Albite, Quebec, 498 Allanite–(Ce), New York, 162 Almandine...Bahmann, U., Raspite from the Erongo Mountains, Namibia, 272–74 Baileychlore, 319 Bailey, D. G., see Thirty-sixth...Cairncross, B., Raspite from the Erongo Mountains, Namibia, 272–74 Calaverite, Cripple Creek, Colorado, R...Collector’s Note, Raspite from the Erongo Mountains, Namibia, B. Cairncross, H. Van Niekerk, C. Reineke, U....Autonomous Region, China, R. B. Cook, 242–48; Spessartine, Marienfluss, Northern Namibia, R. B. Cook |  | | 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 (issue) | | the world 's m ost important diam ond-producing region . Certainly. African sources contin ue to produce...continuing role as the most important dia mond-producing region in the world , surpassing in overall impact even...discovered in 19 10 (Kunz, 1911i Cobba, 1989), in the region south of Lake Victoria. In 1925, Tangan yika Dia...Kenya Lesoth o Liberia Malawi Mali Mozambique Namibia Nigeria Sierra Leone South Africa Swaziland Tanzania...fSouthern Alrica encompasses: Botswana, Lesotho, Namibia, South Africa, Swaziland, and Zimbabwe. gCentral |  | | Book | | Republic, 6 cm). Figure 1.2 Halite crystals (Namibia, 5.8 cm). 6 section devoted to the display of...in groups 8–12, show marked deviation. In this region of the Periodic Table, electronegativity increases...bonded substances, the electrons are confined to the region between the nuclei of the bonded atoms and they...showing stepped, cubic crystal faces (Erongo, Namibia, 5.8 cm). hence occurs less commonly. Figure 4...to produce interlayered lamellae of NaAlSi3O8 (albite) and KAlSi3O8 (orthoclase). At high temperature |  | | Book | | coppercrystals co1ne from many localities like Tsumeb, Namibia and Chessy, France. Crystals up to 140mm (5½ in)...15 mm (1 9h2 in) come from Konder in Khabarovsk Region, small crystals, but mainly nuggets, weighing up...aggregates are found in Sri Lanka (Radegara, Galle region). Accumulations in Buckingham and Grenville, Quebec...Bor, Serbia; Bisbee, Arizona, USA and Tsu1neb, Namibia. Application: important Cu ore. Djurleite Cu31S16...Montana; Bisbee, Arizona, USA), also in Tsumeb, Namibia, together with chalcopyrite, pyrite and other minerals |  | | Book | | coppercrystals come from many localities like Tsumcb, Namibia and Chessy. France. Crystals up to 140mm (5'A in)...to 15 mm ("/» in) come from Konder in Khabarovsk Region, small crystals, but mainly nuggets, weighing up...aggregates are found in Sri Lanka (Radegara, Galle region). Accumulations in Buckingham and Grenvillc, Quebec...(Diamantina, Minas Gerais), Congo. Angola and Namibia were found in placer deposits. Diamonds of industrial...Bor. Serbia; Bisbee, Arizona. USA and Tsumeb, Namibia. Application: important Cu ore. Djurleite Cu |  | | Journal (issue) | | idealized diagram of the occurrence of opal in this region).The sandstone is usually overlain by a silcrete...Photomicrograph by Shane F. McClure; magnified 30x. plus the region beneath, where less of the chromium has penetrated...Riissia. The ddferent rapalzivi granites in the region vary between 1,650 and 1,700 million years (My)old...addition to quartz, are reddish brown inicrocline, albite, quartz, biotite, and, locally, muscovite. The...crystals of quartz, Notes and New Techniques albite, microcline, orthoclase, and gem beryl; locally |  | | Journal (issue) | | 11 DTCsightholder manufacturing facilities in Namibia. However, these are supplied from all DTC sources...of cutting factories throughout South Africa, Namibia, and Botswana, such as this facility in South Africa...with the opening of a new mine in the Nova Era region and technological developments at established mines...created potential for unrest in an already volatile region of the country, formulated a stimulus package (Golan... Tanzania, works a tsavorite mine in the rural region of Lemshuko. To serve the needs of the miners’ |  | | Journal (issue) | | water pools and scorching soil: This marvelous region (Plutonian realm) was discovered in 1847 by Mr...Great Valley sequence in The Geysers-Clear Lake region of northern California. In Field Trip Guide to...magnetic studies o f The Geysers-Clear Lake geothermal region, California. U.S. Geological Survey Open File Report...reminiscent of the color of the rhodochrosite from the region. A few tightly packed sprays are a deep wine red...occurrence of well crystallized specimens from the region although the mineral has been observed as massive |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Huantaya(*), Chanarcillo(*), and Chanca, Chile; Tsumeb, Namibia. BM DI:96, R:313, P&J:71, ABI:475. 1.1.1.3 Copper...Broken Hill mine, Zambia; Onganja mining district, Namibia. Andacolla, near Coquimbo, and Chuquicamata, Chile;...nm); weakly anisotropic. Bolshoi Anyui R.., Kolyma region, Russia, in gold-bearing alluvium. sm MZ 11(4):88(1989)...VHNjo9 = 260. R = 55.3 (540 nm). Magnetic. Kumak region, Southern Ural Mts., Russia, in quartz veins with...VHNjo9 = 900. R = 58.8 (540 nm). Magnetic. Kumak region, Southern Ural Mts., Russia, in quartz veins with |
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