 | | 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...sodalite, soapstone, topaz, tourmaline and turquoise. Tourmaline, rose quartz and smoky quartz are...the most important semi-precious stones found in Namibia. The major deposits of these semi-precious stones...morganite, dumortierite, milarite, topaz and turquoise. An extensive deposit of amethyst occurs in quartz-calcite |  | | Report (issue) | | potassically altered parts of the system are exposed (Sinclair, 1995). Likewise, bands 4/5 and 7/9 of ASTER satellite...Clark and others, 2007). In the thermal infrared region, quartz and hydrous silica contain emission minima...the magma is largely inherited from the source region (Carmichael, 1991). Other parameters, such as magma...and so forth) are also inherited from the source region. The compositional features and degree of magma...(Cooke and others, 1998, 2005; Richards, 2003; Sinclair, 2007; Sillitoe, 1998; Sillitoe and Perelló, 2005 |  | | Report (issue) | | with the University of New Mexico, with the State Mine Inspector and with other departments of State Government...------------Tyrone PowELL STACKHOUSE, JR., Coal Mine Operator ____________________________San Antonio...Washington, D. C. U.S. Geog. and Geol. S. Rocky Mt. Region (Powell). United States Geographical and Geological...Geological Surveys of the Rocky Mountain Region (in charge of J. W. Powell). U. S. Geog. S. West looth Mer...(Copyright, 1895). (A perspective drawing of the region NE of Taos and NW of Elizabethtown). Anderson, |  | | Report (volume) | | William C. 5. Pre-Wisconsin glacial drift in the region of Glacier National Park, Montana (with discussion...mineral resources of-Keekeek and Kewagama lakes region: Quebec (Province), Mines Branch, Rept. on mining...peculiar hematite ore on the tract of the Durham mine, Durham, Penna.: Econ. Geology, vol. 7, no. 2, pp...geologic structure. Booth, William M. The Ontario iron mine, New York. See Taylor and Booth, no. 1070. Bosworth...the stratigraphy arid geologic structure of the region. , ^ , Mineral resources of the United States |  | | Journal (issue) | | News International • Australia’s Ellendale diamond mine opens • Aquamarine and spessartine from Tanzania...Jeremejevite from the Erongo Mountains, Namibia • New morganite mine in Madagascar • Namibian gem localities...encountered in Namibia • Plastic and steel pearl imitations • Gem cutting factories in Namibia • Conference...diamonds shown here are from Canada’s Ekati Diamond Mine™, which started production in 1998. The necklace...the opening of Canada’s first diamond mine, the Ekati Diamond Mine™, in 1998, but a number of other projects |  | | Journal (issue) | | n d to the east of the well-known U m b a River mine producing pastel shades of gem corundum. T h e precise...strong b a n d is prominent in the 4350Â-4300Â region, b u t it was difficult to penetrate the gloom...centred in t h e 4610Â region a n d there is another broad b a n d in the 4850Â region. These bands are all...garnets and virtually all of the other gems from this region h a d their origins in the Basement Complex rocks...More than one ultrabasic intrusion is known in the region a n d the possibility of their continuity at depth |  | Hezel, D. C., Kalt, A., Marschall, H. R., Ludwig, T., Meyer, H.-P. (2011) Major-element and Li, Be compositional evolution of tourmaline in an S-type granite-pegmatite system and its country rocks: an example from Ikaria, Aegean Sea, Greece. The Canadian Mineralogist, 49 (1) 321-340 doi:10.3749/canmin.49.1.321 | Journal (article/letter/editorial) | | several other localities around the world (e.g., Sinclair & Richardson 1992, Jiang et al. 2003, Marschall...Pleochroism changes from light brownish yellow to turquoise-green in the core, and to olive-brown in the...quartz–tourmaline rocks shows zoning, with a turquoise core and a brown to reddish brown rim. The brown...Tourmaline shows variable patterns of zoning, with a turquoise to green core and a rim with fine oscillatory...dykes from Ikaria island in the Aegean back-arc region: geodynamic implications. Geodinamica Acta 22, |  | Drivenes, Kristian, Larsen, Rune B., Müller, Axel, Sørensen, Bjørn E., Wiedenbeck, Michael, Raanes, Morten P. (2015) Late-magmatic immiscibility during batholith formation: assessment of B isotopes and trace elements in tourmaline from the Land’s End granite, SW England. Contributions to Mineralogy and Petrology, 169 (6) doi:10.1007/s00410-015-1151-6 | Journal (article/letter/editorial) | | Rozendaal and Bruwer 1995; Shewfelt et al. 2005; Sinclair and Richardson 1992; Taylor et al. 1992; Trumbull...separation of an immiscible hydrous borosilicate melt (Sinclair and Richardson 1992; Trumbull et al. 2008), that...early nineteenth century cassiterite–tourmaline lode mine at Carn Cravah, just above Nanjizal (Mill Bay) along...(generation 2 and 3). 2. Acicular grains with turquoise to pale beige pleochroism associated with cassiterite...Blue 4 Brown 2 (g) CarnCravah Brown 2 Turquoise 1 0 0 -12 -10 -8 -6 -4 -2 δ11B 6 -4 |  | | Book | | Mountain lakes are often incredible shades of turquoise blue. This is because of the rock flour fed into...November December Peridot Sapphire Opal Topaz Turquoise 27 Precious metals Gems are not the only treasures...from the mine below will be used to make copper pipes. Let’s make a hole Boom! An open-cast mine is a noisy...breakdown of rock by the weather. Open-cast mine a mine with an open top, instead of tunnels under the...15 mine 30-31 minerals 5, 30, 44-45 in art 32-33 Mohs scale 42-43 obsidian 10, 11 open-cast mine 30-31 |  | | Journal (issue) | | sources are pegmatites of the central highland region of the Malagasy Republic, the states of Cearâ and...microanalyzer. Examination of x-ray spectra in the region 1-10Â A showed that the only major elements present...refractive index in sodium SPESSARTINE RUTHERFORD MINE No.2, Amelio, Virginia 40 MnO 35 MnO 30 ~ 25...colour graduation. 129 SPESSARTINE RUTHERFORO MINE No.2, Amelio, Virginia 1.810 REFRACTIVE INDEX...SPESSARTINE END MEMBER (1830) <, <, RUTHERFORD MINE No 2 <, 1.825 Amelio, Virginia <, <, <, < |  | | Journal (issue) | | H. Pough 282 Your birthstone may be either turquoise or lapis lazuli The Rise of the Dimosaurs......Artemia, which you'll find in the Great Salt Lake region. For Artemia represents life in its toughest form...History Savages the world over have prized the turquoise, while its fame for beauty and magic resound through...DECEMBER, I94I reay er ap (Above) A VEIN of turquoise cuts through the matrix rock. From Los Cerrillos...Mines in New Mexico — the dawn of civilization, turquoise has played an important role in the lives of primitive |  | | Journal (issue) | | Labradorite of the Greelz term.] from the Poiiderosa Mine! Oregon," seems to be that The famous Russian niineralogist...operating in Kimberley, South Africa; the Mwadui mine in Tanzania),and the significant secondary alluvial...alluvial deposits on shore in South Africa and Namibia approach depletion. Thus, to ensure an adequate supply...supply of fine-quality diamonds from the mine to the marketplace (figure 11, it is necessary to locate...whether a newly discovered pipe could become a viable mine. On the basis of these critical factors, we predict |  | | 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) | | from 1900 to the middle 1940s; but the Mariposa mine, which produced most of the rare minerals, ceased...wrote for Rocks & Minerals on "The Weeks Pegmatite Mine, Wakefield, Carroll County, New Hampshire" (March/April...(Zeitner, 1972). Altuda Mountain district, Bird mine, 8 miles E of Alpine on a N projecting ridge. Worked...Standen, 1983). Altuda Mountain district, Bissett mine, 14 miles E of A l pine on E slope of Bissett...Bend National P a r k , Mariscal mine ( = Ellis, Viviana, or Lindsey mine), 26 miles S E of Study Butte |  | | Catalog/List | | (Ukrainian Institute of America at the Fletcher-Sinclair Mansion) Friday, October 2 – Sunday, October 4...“rough” directly from mine owners. Over the years, he befriended many of these mine owners and would travel...occurring. The stone exhibits a native cut as the mine owner would not let the “rough” leave the country...incredible color, it most likely comes from the Mogok region. This gem was cut into a cushion shape with a brilliant... 72016 Gemstone: Rhodochrosite - 2.02 Cts. Sweet Home Mine, Mount Bross Alma District, Park Co. Colorado, USA |  | | Journal (issue) | | moving products from mine to consumer. The main cover image was taken at the AnahÌ mine in Bolivia, a major...of the company (Even-Zohar, 2007). Because of the mine closures, De Beers’s market share by volume fell...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...pink diamonds (0.51 and 0.55 ct) from the Argyle mine in Australia were part of the 2007 Argyle pink diamonds |  | | Journal (issue) | | Bob Jones Field Trip Little Hatch et Mountains Turquoise 20 Run to the border for a wealth of collecting...Show and found some beautiful blue-green Chinese turquoise cabs. The stones were squares roughly ¾ inch on...- YAG - Quartz OPAL · SPECTROLITE - LAPIS · TURQUOISE ROUGH CHRYSOPRASE 771 Boston Post Rd East, # 180...and jewelry, displays , hobby demonstrations, gem mine and hands-on jewelry for chil· dren , merit badge...mineral market as specimens. In 1973, the Wessels mine opened and much more rhodochrosite was mined . More |  | | Journal (issue) | | diamond-bearing, potassium-enriched rocks of the Kimberley region in Western Australia occur in over a hundred Miocene...investigated in some detail ( Post et al, 1 982; Sinclair and McLaughlin, 1 9 82; Pring and Jefferson, 1...ultrapotassic (lamproitic) rocks of lhe West IGmbcrley region, Western Australia in Kornprobst., J . (ed.), Kimberlites...the South Mine, Broken Hill, N.S.W., before the tum of the cenrury ( 1 894). No precise mine locality...Australia ( Gorman 1 976) and at the Beltana Broken Hill Mine. 29 km west of Beltana Station, South Australia |  | | Journal (volume) | | Johann Wolfgang von Goethe, with portfolio of 64 Turquoise: Ancient Gem Ever-popular photographs by Bob...including "Rhodochrosile," "Copper" and "The Dunlon Gem Mine and lls Tourmalines" Curren1ly he is working on...claw and re ocard, /,y L1111i> Zara and swff of MINE R A L DIGEST .. K11n�: C11no11s Lor� of Precious...in Chaffee County, Colorado. From the lase-named region, dodecahedrons have been taken in sizes up to 10-...was first taken in rolled crystals from the gold mine district ofN izhni-Tagil and the serpe ntines o |  | | Catalog/List | | (Ukrainian Institute of America at the Fletcher-Sinclair Mansion) Friday, May 1 – Saturday, May 2 • 10:00...first offered for sale. 73007 TOURMALINE Minh Tien Mine, Luc Yen, Yenbai Province, Vietnam A classic Vietnamese...online, visit HA.com/6150 73008 ELBAITE Minh Tien Mine, Luc Yen, Yenbai Province, Vietnam This unusual...2015 | 12:00 PM CT 15 73009 ELBAITE Minh Tien Mine, Luc Yen, Yenbai Province, Vietnam Clearly defined...coloration, this is a classic Vietnamese Tourmaline. The region of Luc Yen has been yielding Tourmalines since |  | | Report (issue) | | Mt. Region (Powell)-United States Geographical and Geological Survey of the Rocky Mountain Region (in...southwest [san Juan River !"*3::r_ in-Blanco-shiprock region]: carnegie Inst. lvashington ylarno'ot no. 88,...accessory minerals of the rocks of the Ground Hog mine, Vanadium, Nei,t, Mexico: Ind. Univ', A.M. thesis...locality and association, and its identity_with turquoise: Am. Jour. Sci., ld ser., v. 25, p. 227-222, lSEg...H. W., 1. The-stratigraphy of the Mount Taylor region, New Mexico, with a summary and discussion: Mass |  | Bauer, Matthias E., Seifert, Thomas, Burisch, Mathias, Krause, Joachim, Richter, Nancy, Gutzmer, Jens (2019) Indium-bearing sulfides from the Hämmerlein skarn deposit, Erzgebirge, Germany: evidence for late-stage diffusion of indium into sphalerite. Mineralium Deposita, 54 (2) 175-192 doi:10.1007/s00126-017-0773-1 | Journal (article/letter/editorial) | | granite-related Mount Pleasant deposit in Canada (Sinclair et al. 2006), in the epithermal Pb-Zn-Ag vein...200 meters Skarn units faults Hämmerlein unit mine infrastructure, adits and shafts Dreiberg unit...sampling locations 2-4, 2-6b, and 4 in the underground mine infrastructure. Modified after Schuppan and Hiller...and garnets of the andradite–grossular series (turquoise and blue). b Thin section 2-6b_10a. Chalcopyrite... Sphalerite Mount Pleasant (Sinclair et al. 2006) Sakuraiite Ikuno Mine (Shimizu et al. 1986) Ishiharaite |  | | Journal (issue) | | -benzylbenzoate- -natural (2,58-2.75) (2,58-2,75) turquoise (2,6-2,84) tab (soapstoneX2^ -2,8) l:.: •. ...turning. But spare a thought for the m e n w h o mine these essential raw materials, the intrepid adventurers...Jadeite, nephrite peridot, sphene. Some turquoise Some turquoise (less porous), (porous). plastic materials...u e turquoise a n d (a) plastic-bonded imitation of turquoise or (b) plastic-bonded real turquoise. 210...210 A STUDY OF SOME GOLD MINE DIAMONDS By F. A. RAAL Diamond Research Laboratory, Johannesburg, South |  | | Journal (issue) | | BOULANGEBITE AND ASSOCIATED MINERALS OJ' THE CLEVELAND MINE, STEVENS Co., WASH. By Charles 0. Fernquist. A...Boulangerite and Associated Minerals of the Clevelan d Mine, Ste'"ens County, Washington. By Charles O. F ernquist...diamond cu be weighing 64: carats from the W esselton Mine, Kimberly is also in the R oebling colleet ion....pyrrhotite crystals on enlc·ite from the P otosi mine, Santa Eulalia, Chihuahua, Mexico; a fine slab of...Bridgewater, Pennsylvania; a specimen of crystallized turquoise ; a beautiful large purple apatite f r om Maine |  | | Book (volume) | | joyous sounds I can think of... a second favorite of mine is the Swainson’s Thrush which occurs all around...eventually project the extracted signals to the auditory region in the forebrain, called Field L, which controls...controls how birds hear sounds. How this auditory region interacts with the forebrain’s motor regions (i.e...regulates muscles of the larynx. Field L is an auditory region in the forebrain that connects to HVc. Figure kindly...Langrand, Gérard Rocamora, Clemencia Rodner, Ian Sinclair, Aurora Solé and Barry Walker, who freely provided |
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