 | | Journal (issue) | | Articles Famous mineral localities: The Erongo Mountains, Namibia . . . . . . . . . . . . . . . . . . ....cm, with schorl and feldspar, from the Erongo Mountains, Namibia. Desmond Sacco collection; Bruce Cairncross...on the mineralogical treasures of the Erongo Mountains in Namibia. Uli’s financial support made possible...Rhodesia (Zimbabwe) and Tsumeb, Southwest Africa (Namibia). He had a mini-van-like truck loaded with minerals...SMALE Famous Mineral Localities: g{x Erongo Mountains Namibia Bruce Cairncross Department of Geology |  | Falster, Alexander U., Simmons, William B., Webber, Karen L., Boudreaux, Andrew P. (2018) Mineralogy and Geochemistry of the Erongo Sub-Volcanic Granite-Miarolitic-Pegmatite Complex, Erongo, Namibia. The Canadian Mineralogist, 56 (4) 425-449 doi:10.3749/canmin.1700090 | Journal (article/letter/editorial) | | GEOCHEMISTRY OF THE ERONGO SUB-VOLCANIC GRANITEMIAROLITIC-PEGMATITE COMPLEX, ERONGO, NAMIBIA ALEXANDER U. FALSTER§...early Cretaceous anorogenic, sub-volcanic Erongo Granite, Namibia, was emplaced into metasedimentary rocks...Neoproterozoic to Cambrian Damaran Orogeny. The Erongo Granite contains pegmatitic miaroles containing...quartz-tourmaline orbicules and the geochemistry of the Erongo Granite. Erongo miarolitic pegmatites are famous for spectacular...spectacular mineral specimens of schorl, foitite, aquamarine, topaz, fluorite, and jeremejevite. Mineral |  | Lensing-Burgdorf, Martina, Watenphul, Anke, Schlüter, Jochen, Mihailova, Boriana (2017) Crystal chemistry of tourmalines from the Erongo Mountains, Namibia, studied by Raman spectroscopy. European Journal of Mineralogy, 29 (2) 257-267 doi:10.1127/ejm/2017/0029-2607 | Journal (article/letter/editorial) | | Crystal chemistry of tourmalines from the Erongo Mountains, Namibia, studied by Raman spectroscopy 1 4 ...morphologies from miarolitic cavities in pegmatites of the Erongo granite are analysed by Raman spectroscopy and...addition, XNa-rich foitite with a composition close to the midpoint of the schorl–foitite join was found...tourmaline with longitudinal zoning. Near-endmember foitite was only found as the last stage of crystallization...Key-words:: tourmaline; Raman spectroscopy; Erongo granite; schorl; foitite. EC 5 1. Introduction 25 26 27 |  | | Book | | AiAiba / farm Anibib 136 8 Grosse Spitzkoppe, Erongo 9 , .,/, loringa tree . Khomas Highland...Aus Nature conservation, Erongo 16 Welwitschia, Goboboseb Mountains 17 . :~~..,-::__ ::...,.;_...Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...Desertand Escarpment The Spitzkoppen The Erongo Mountains The RossingMountains The Central Escarpment- The ...Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and the Diamonds 44 49 241 254 272 275 |  | | Journal (article/letter/editorial) | | Kèshíkèté Qi County, Inner Mongolia Autonomous Region, China. Limpid complex fluorite crystals displaying...coloration. The fluorite mines of the Asturias region, in Spain, have produced some incredibly striking...often at shows as they once were. The Asturias region has three districts that are the most productive...Konrad 1984). Fluorite specimens from the Piemonte region of Italy are little known to most collectors in...(in German) or Krušné Hory (Czech), the Ore Mountains region that straddles the border between Germany |  | | Journal (article/letter/editorial) | | green tourmaline (hat morphology). Here, Na-rich foitite fibers initially develop acicular morphology and...fluor-elbaite X-site vacant group foitite ‘‘A-Fe-O root name’’* magnesio-foitite ‘‘A-Mg-O root name’’* (X)...activityactivity diagrams that include magnesio-foitite in this diagenetic environment. The occurrence...oxydravite for high Na (and Cl)fluid and magnesio-foitite for low Nafluids. For the tourmaline-albite-chlorite...1998), and is classified as a Na-rich, W O-rich foitite (XFe ¼ 0.74) with a composition of (A 0.69 Na 0 |  | Keller, Paul, Roda Robles, Encarnación, Pesquera Pérez, Alfonso, Fontan, François (1999) Chemistry, paragenesis and significance of tourmaline in pegmatites of the Southern Tin Belt, central Namibia. Chemical Geology, 158 (3) 203-225 doi:10.1016/s0009-2541(99)00045-5 | Journal (article/letter/editorial) | | in pegmatites of the Southern Tin Belt, central Namibia Paul Keller a , Encarnacion ´ Roda Robles b,) ...distinct belts within the Damara orogen of central Namibia. Many of the pegmatites have been mined extensively...Granitic pegmatites; Mineral chemistry; Central Namibia 1. Introduction The importance of tourmaline for...pegmatites from the Southern Tin belt of central Namibia, examining the petrographic characteristics and...Geology of the pegmatites The geology of central Namibia is dominated by metasedimentary and igneous rocks |  | | Journal (issue) | | Thirty-three, Number Four Articles Jeremejevite from Namibia . . . . . . . . . . . . . . . . . . . . . . . ...22/#6 Wagholi cavansite (India), Kombat mine (Namibia), Madan mines (Bulg.),Beltana mine $12 v.23/#1...Seravezza Marble (Italy) $12 v.27/#2 Onganja mine (Namibia), Lac Nicolet mine (Quebec), Afghanite $12 v.27/#3...Platinum (Russia), District! Special Otavi Mtn. Land (Namibia), OUT SOLD Issue $12 Repair & Restoration $12 v...minerals, pegmatite minerals 287 Jeremejevite from Namibia Wendell E. Wilson Mineralogical Record 4631 Paseo |  | | Journal (article/letter/editorial) | | Si6O18 Ca Ca Ca X-site vacant group Foitite Oxy-foitite Magnesio-foitite Rossmanite Fe2+3 Li2Al Li2Al Al5Mg...and ion activities (e.g. B(OH)3) in the critical region. Growth of the oscillatory-zoned tourmaline is...core of schorl (XMg = 0.78, Na = 0.56 apfu) to a foitite rim (X-site vacancy = 0.5, Na = 0.44, Ca = 0.6...g. Duchoslav et al. 2017). In the Erongo granitic complex, Namibia, tourmalines are found within granitic...distinct compositions (Fig. 3b): the earliest is foitite, followed by schorl, the elbaite/fluor-elbaite |  | | Journal (issue) | | the high mountains of Afghanistan and Pakistan; Minas Gerais in Brazil; Mozambique and Namibia in Africa;...source of some amazing gem material. --.In fact, the region was one of the world's leading sources of gem tourmaline...(emeralds may be found in the exometasomatic contact region of some pegmatites with mafic country rocks), most...aquamarine and topaz crystals from the Erongo pegrnatites, Namibia. Figure 7 (right). Gem-quality elbaite...anatectic melts segregate and accumulate in the source region, ascend rapidly, and are emplaced quickly into |  | | Show/Event (guide) | | Frederick A. Canfield 4 4 Minerals from the Erongo Mountain, Namibia by Georg Gebhard 6 3 We warmly welcome...1010+/-7 to 1007+/-4 Ma) in the Hudson Highlands region of New York. Many shear zones with widths of 1-2...Fe-REE), developed in the New York Hudson Highlands region and extend to New Jersey and to Pennsylvania's...Italy 3, Japan 3, Mongolian People's Republic 1, Namibia 1, Norway 2, Peru 1, Republic of South Africa 2...Kommune structure to what is simply Tunu Admistrative Region/East Greenland (Werner Bjerge alkaline complex) |  | Watenphul, Anke, Malcherek, Thomas, Wilke, Franziska D. H., Schlüter, Jochen, Mihailova, Boriana (2017) Composition–thermal expandability relations and oxidation processes in tourmaline studied by in situ Raman spectroscopy. Physics and Chemistry of Minerals, 44 (10) 735-748 doi:10.1007/s00269-017-0894-1 | Journal (article/letter/editorial) | | 53(OH)0.25O0.22 Watenphul et al. (2016a) S44 Foitite ☐0.61Na0.35Ca0.03 2+ Fe2+ 1.28 Al1.03 Mn0.41...of F e2+-bearing dravite (S61) in the spectral region of the a framework and b OH-stretching vibrations...whether YR is Fe2+ in the case of fluor-schorl and foitite, Mg in the case of dravite, or Li and Al in the...R AlZAl-2YAlZAlZAl (a) elbaite dravite schorl foitite buergerite 4 0 0.56 0.60 0.64 ‹rYZZ-YZZ-YZZ›...(dω/dT)/ω0 | 16 (b) elbaite dravite schorl foitite 12 8 RYAlYAl-X RYRYAl-X Y Y Y R R Al-X Y Y Y |  | | Report (issue) | | last year, there were times when it seemed that mountains had to be moved if we were to progress. We are...and effort that have helped us to move those mountains. We further extend our thanks to the subscribers...values: feruvite by Grice and Robinson (1989), foitite by MacDonald et al. (1993) and rossmanite by Selway...2001 by Reznitsky et al. (see box page 9). Today, foitite is considered a very common tour maline species...the Sludyanka complex in the southern Lake Baikal region of Russia. Six New Species Today, this team has |  | | Journal (issue) | | the Columbia River. Although the surrounding mountains are heavily timbered, the immediate city area...is moderate compared to that in the adjacent mountains. Butte, a community of about 30,000, sprawls over...the largest stream in an otherwise arid mountain region. By 1867, approximately $1.5 million in gold had...description can be given here. The mineralized region around Butte, Montana, measures about 12 km east-west...lot. The Cohen tungsten mine in the Dos Cabezas Mountains, Cochise Co., opened during World War II, had |  | | Journal (issue) | | New York and Carlsbad More on jeremejevite from Namibia In response to “Jeremejevite: A gemological update”...about the recent production of jeremejevite from Namibia. From December 1998 to February 2001, I was the...mm) was recently recovered from the Erongo Mountains in Namibia. Courtesy of C. Johnston. the first...jeremejevite in the Erongo Mountains (see, e.g. figure 1). Given the extent of the Erongo production, gemologists...significantly. Christopher L. Johnston Johnston-Namibia C.C. Omaruru, Namibia chris@johnston.com.na GEMS & GEMOLOGY |  | | Book | | localities for good ilmenite crystals exist in the region (Brunet, I 977b ). NEW YORK Amity, Orange County...in Switzerland, it is only in the Maderanertal region of east-central Canton Uri that clefts bearing...clefts are found fairly commonly throughout this region, such that only a handful of notable finds during...Discoveries, 1960-2015 ILMENITE AFRICA (Cherry) Mountains (Drnitriy Belakovskiy, personal communication...contact-metamorphic skarn rocks in the High Atlas mountains around the town of Imilchil began in the 2000s |  | | Journal (issue) | | finally revealed. I have studied many maps of the region explored by Fernão Dias Paes Leme, and have concluded...northeastern part of the state, cutting through a region rich in deposits of precious stones. According...with carminite in chalcocite, 7 cm, from Tsumeb, Namibia (JJT Collection, NMNH specimen 137643 and photo)...while George pressed on to Southwest Africa (now Namibia) and Brazil. Jack showed us what it takes to be...gold deposits located in northeast Nevada. This region of the state, known as the “Nevada high desert |  | | Journal (issue) | | 1997. Die Edelsteinvorkommen in Tansania: Die Region Tunduru-Songea. Zeitschrift der Deutschen Gemmologischen...companies in the region were available, but it can be assumed that pearls from harvests in the region were marketed...Yanase are situated behind a dam in the southern region of the lake, in the connecting branches of the...most intense band, near 1434 cm-1 (v3) and in the region of 711 cm-1 (ν4). The Raman spectrum of vaterite...impurities were present, peaks in the ν3 - and ν4 - region would also have to be present, but were not found |  | | Journal (issue) | | 167 RESEARCH ON GEM FELDSPAR FROM THE SHIGATSE REGION OF TIBET RESEARCH TRACK POSTER SESSION 1 Ahmadjan...diamond reportedly from India’s fabled Golconda region, estimated at $1.4–$1.6 million, went for just...dramatically reduce the absorption in the visible region of the spectrum and change the luminescence characteristics...have selective absorption in the visible light region of the electromagnetic spectrum. Various treatment...occurrences in California and the Appalachian Mountains remain a mystery. Explanation of the sources of |  | | Journal (issue) | | Argentina. Ahlfeld surveyed the mineral deposits of the region and published a book on the mineralogy of Argentina...man in this very steep and remote sub-tropical region. Figure 1. Friedrich Ahlfeld as a young man. Photo...Kempff National Park in eastern Bolivia. This remote region was discovered by the legendary British explorer...new sulphostannate]. (1926) Los minerales de la region metalifera de la cordillera del norte, Bolivia...minerals of the northern Cordillera Metalliferous Region, Bolivia]. 228 (1926) Die Antimonitlagerstätte |  | | Book (edition) | | an inner solid region of diameter 2440 km and density about 8 gcm3, and an outer region about 2260 km...alumina, alkalis and the rarer elements. If the region is quiescent and all the magma solidifies in the...if about half way through crystallization, the region becomes 8 Rocks and the Processes That Formed...Miarolitic cavity in granite from the Mourne Mountains, Northern Ireland. A topaz with good crystal form...one example being Mount St Helens in the Rocky Mountains. At the felsic end of the range are rhyolites |  | | Book | | ovite Rocks within Meta-Ultramafites of Ilmen Mountains, South Urals of Russia: Evidence from Mineralogy...Enigmatic Alluvial Sapphires from the Orosmayo Region, Jujuy Province, Northwest Argentina: Insights...(Shakisso), Madagascar (Mananjary), Russia (Ural mountains), Zambia (Kafubu) and Zimbabwe (Sandawana)). Their...genesis of gem-quality sapphires from the Ilmen Mountains (South Urals, Russia) found in situ within ultramafites...on another occurrence of sapphires in the same region of the South Urals occurring in anorthosites (kyshtymites) |
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Erongo Mountains, Karibib Constituency, Erongo Region, Namibia