 | | Journal (article/letter/editorial) | | 20013 pohwatp@si.edu FLUORITE Part 2 Huanggang Mine, Inner Mongolia, China T he first part of this...include sphalerite, galena, siderite, and quartz. Casts of quartz after fluorite are common from here. Recent...northern England, particularly from the Rogerley mine, has made these classic specimens available once...KĂšshĂkĂštĂ© Qi County, Inner Mongolia Autonomous Region, China. Limpid complex fluorite crystals displaying...made of the complex crystals from the Trevaunce mine, St. Agnes. The crystals on the Smithsonian specimens |  | | 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...one is at Okorusu Fluorite Mine, a replacement-type deposit that is associated with the Okorusu Alkaline...56% CaF2. With the exception of the Garub Fluorite Mine, a breccia pipe deposit, all other fluorite occurrences |  | Cangelosi, Delia, Broom-Fendley, Sam, Banks, David, Morgan, Daniel, Yardley, Bruce (2020) Light rare earth element redistribution during hydrothermal alteration at the Okorusu carbonatite complex, Namibia. Mineralogical Magazine, 84 (1) 49-64 doi:10.1180/mgm.2019.54 | Journal (article/letter/editorial) | | during hydrothermal alteration at the Okorusu carbonatite complex, Namibia Delia Cangelosi a,*, Sam Broom-Fendley...7th May 2019 Abstract The Cretaceous Okorusu carbonatite, Namibia, includes diopside-bearing and pegmatitic...fluorite replaced the calcite carbonatites at Okorusu and resulted in extensive chemical change, suggesting...KEYWORDS: REE, carbonatite, hydrothermal transport, Okorusu. * ee12dac@leeds.ac.uk 1. Introduction The rare...metalsâ â metals which are sourced from a restricted region and have low substitutability and recyclability |  | | Journal (article/letter/editorial) | | an adventure of a lifetime. Spend two weeks in Namibia, a country of striking scenery, exotic animals...villages, and collected fluorite at the Okorusu mine near Otjiwarongo. We also spent two days in Etosha National...felt that additional days should be scheduled in Namibia to offset the time (and expense) spent on the long... Natural History Museum of Los Kakia, a diamond mine Angeles County manager for the Nam900 Exposition...their spouses, and four other friends. Our tour of Namibia and South Africa was now extended for a third week |  | | Report (volume) | | fluorspar have been worked in South Africa and Namibia. Stockworks of fluorspar in granite are mined extensively...reported from Angola, Kenya, Morocco, Mozambique, Namibia, South Africa, Tanzania, and Uganda. Fluorite has...carbonatites have been reported only in the Okorusu district of Namibia. Fluorspar production from Africa through...isometric mineral that is generally associated with quartz, chalcedony, calcite, or barite; sphalerite and...young rifts in eastern and central Africa, in Namibia (South West Africa), and in Angola and is associated |  | | Journal (issue) | | field divide, so we started out, encouraged by quartz in flints which were sparkling in the sun, including...Westcott copper mine, comprised three separate collecting sites in two short adits and the mine dump. Nearby...Nearby was the Badger Level section of the Huglith mine complex, which was our other location. We were too...a layby in the forestry surrounding the Huglith mine. When we did so later in the day there were some...more interesting of the. sites at the âąWestcott mine, though a few good finds were made in the two ad |  | | Book | | Mountainland The Central Northern to Northwest Region including Damaraland The Central Namib Desertand...s Onganja Mine and Surrounding Copper Deposits The South The Pegmatitesin Central Namibia Luderitz and... 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 |  | | Report (issue) | | colored arsenates (mostly adamite) from the Ojuela mine. The sterling pale purple example shown here costs...is about $615). Adamite, 2.2 cm, from the Ojuela mine, MapimĂ, Durango, Mexico. Keyâs Minerals specimen...fluorapatite/fluorite âcombinationâ piece from the Sauberg mine, Ehrenfriedersdorf, Obersachsenâi.e. Upper Saxony...rarity as time goes by. The Sauberg tin/tungsten mine closed for good when the Berlin Wall came down in...Fluorapatite and Fluorite, 2.3 cm, from the Sauberg mine, Ehrenfriedersdorf, Saxony, Germany. Keyâs Minerals |  | | Journal (article/letter/editorial) | | carbonatite-related fluorspar ore deposits are located at Okorusu (Namibia), Amba Dongar (India), and Mato Preto (Brazil)...occurs especially in the form of quartz, potash feldspar, and sericite. Quartz occurs in both free particles...in particles where it is locked with fluorite. Quartz was deposited late in the paragenetic sequence...karbonatitischen Fluoritlagerst~itten sind Okoruso (Namibia), Amba Dongar (Indien) und Mato Preto (Brasilien)...Currently fluorspar deposits are mined at Okorusu (Namibia), A m b a Dongar (India), and Mato Preto (Brazil) |  | | Catalog/List | | it collected when the Tsumeb Mine (as well as other mines of the region) were still in production in...climbing soon brought him into contact with the quartz crystals that were found on the mountain slopes...engineering work took him to the Tsumeb Mine in Namibia. This mine is renowned for producing what are arguably...desert-like "Sperrgebiet" area of the southern coast of Namibia, with its fabulous wealth of gem diamonds. One...Ianâs interest stems from the family trips to Namibia, including the mines of Tsumeb. He worked with |  | BĂŒhn, B., Rankin, A.H., Schneider, J., Dulski, P. (2002) The nature of orthomagmatic, carbonatitic fluids precipitating REE,Sr-rich fluorite: fluid-inclusion evidence from the Okorusu fluorite deposit, Namibia. Chemical Geology, 186 (1) 75-98 doi:10.1016/s0009-2541(01)00421-1 | Journal (article/letter/editorial) | | luid-inclusion evidence from the Okorusu f luorite deposit, Namibia B. BuÌhn a,*, A.H. Rankin b, J. Schneider...March 2001; accepted 7 December 2001 Abstract The Okorusu fluorite deposit occurs in Pan-African carbonaceous...northern Namibia. The epigenetic mineralization formed from fluids expelled from the Cretaceous Okorusu carbonatite...70458 â 0.70459, which are close to those of the Okorusu carbonatite. Primary and secondary aqueous fluid...H2O â CO2 fluid-inclusion population trapped in quartz which we, based on their distribution and composition |  | | Journal (article/letter/editorial) | | resources of anorogenic alkaline complexes in Namibia: A review F. Pirajno a a Geological Survey of...resources of anorogenic alkaline complexes in Namibia: A review, Australian Journal of Earth Sciences:...resources of anorogenic alkaline complexes in Namibia: A review F. PIRAJNO Downloaded by [Dalhousie...Plain Street, East Perth, WA 6004, Australia. In Namibia there are numerous anorogenic alkaline complexes...carbonatites, mineralization, Namibia. INTRODUCTION In southwestern Africa (Namibia, southern Angola and northwestern |  | | 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) | | Front cover: Sulfur on Aragonite, 25 cm Cozzodisi mine, Casteltermini, Agrigento, Sicily, Italy. Adalberto...Magdalensburg (Carinthia, Austria), where a series of quartz crystals were found at a settlement that can be...(Lombardy, northem Italy), a transparent and perfect quartz crystaldoubly terminated and about 2.5 cm in diameter-was...foothills of the Lombardy Alps (Pezzotta, 1999), where quartz occurs in a deposit very similar to that of the...the Sicilian sulfur deposits; so-called "fenster quartz" of Porretta Terme; gypsum and other minerals of |  | BĂŒhn, B, Schneider, J, Dulski, P, Rankin, A.H (2003) Fluidârock interaction during progressive migration of carbonatitic fluids, derived from small-scale trace element and Sr, Pb isotope distribution in hydrothermal fluorite. Geochimica et Cosmochimica Acta, 67 (23) 4577-4595 doi:10.1016/s0016-7037(03)00392-2 | Journal (article/letter/editorial) | | AbstractâAssociated with the Cretaceous Okorusu carbonatite complex (Namibia) is a hydrothermal fluorite mineralization...followed by purple and colorless fluorite II, smoky quartz and barite, a Mn-rich crust on early calcite, and...hydrothermal quartz (f â° 0.1). A crush-leach experiment for fluid inclusions in the hydrothermal quartz yielded...yielded a trend from the fluid leachate to the host quartz (206Pb/204Pb â«œ 18.224 and 18.602, 207Pb/204Pb â«œ...BuÌhn et al. Fig. 1. Geology of the Okorusu carbonatite complex, Namibia (after Van Zijl, 1962). modification |  | | Journal (issue) | | cover Vanadinite 3.4 cm, from the North Geronimo mine, La Paz County, Arizona. Dick Morris collection;...custom jewelry. Wulfenite, 5.4 cm, from the Defiance mine near Gleeson, Cochise County, Arizona. Ken Donn...photo. Wulfenite (hot-pink), 3.7 cm, from the Glove mine, Tyndall district, Santa Cruz County, Arizona. Collected...pseudomorph after azurite, 4 cm, from the Inspiration mine, Globe-Miami district, Gila County, Arizona. Ken...Cerussite twins on matrix, 6.5 cm, from the Grand Reef mine, Aravaipa district, Graham County, Arizona. Ken |  | | Journal (article/letter/editorial) | | Damaraland Lamprophyres and Carbonatites, Northwestern Namibia: Evidence for PlumeâLithosphere Interactions ANTON...igneous complexes in Damaraland, northwestern Namibia. Lamprophyres, emplaced as late-stage dykes, stocks...WORDS: geochemistry; lamprophyre carbonatite; Namibia; Tristan plume âCorresponding author. Telephone:+27-21-650-2921...complexes extend through Damaraland in northwestern Namibia (Fig. 1) and provide an example of the contiguous... 1. Simplified geological map of northwestern Namibia, showing the main outcrop regions of the Etendeka |  | | Journal (issue) | | 28-30 Fluorite (Dodecahedron) with Quartz, Erongo Mountains, Namibia, 2.5 x 2.6 x 2.4 cm, Jeff Scovil photo...field trips in the region, including one of my first trips to collect Herkimer quartz âdiamondsâ in Little...track, to collect specimens underground at the Kelly mine, famous for exceptional blue-green botryoidal smithsonite...nearby Graphic mine, noted for azurite and malachite crystals, and visit the Blanchard mine to collect fine...included that of Ms. Blanchard at the Blanchard mine, who greeted someone she didnât know with a shotgun |  | Götze, Jens, Nasdala, Lutz, Kleeberg, Reinhard, Wenzel, Marita (1998) Occurrence and distribution of âmoganiteâ in agate/chalcedony: a combined micro-Raman, Rietveld, and cathodoluminescence study. Contributions to Mineralogy and Petrology, 133 (1) 96-105 doi:10.1007/s004100050440 | Journal (article/letter/editorial) | | to represent periodic Brazil-law twinning of a-quartz at the unit-cell scale in agate/chalcedonies. Homogeneous...Homogeneous standard samples including the nearly a-quartz free moganite type material from Gran Canaria were...responsibility: W. Schreyer 1 Variations in the moganite-to-quartz ratio are revealed by varying intensity ratios...symmetric stretching-bending vibrations (A1 modes) of a-quartz (465 cm)1) and moganite (502 cm)1), respectively...zoning of agates revealed that the moganite-to-quartz ratio is often not uniform but shows a cyclic pattern |  | | Journal (article/letter/editorial) | | anorogenic complexes of Damaraland, northwest Namibia: evidence for crustal contamination and its effect...anorogenic complexes of Damaraland in northwest Namibia have been used to estimate the d18O values of the...crust. Introduction The Damaraland region of northwest Namibia (Fig. 1) contains numerous anorogenic...Volcanoplutonic Grosse Spitzkoppe Plutonic Gabbro, quartz syenite, nepheline syenite Alkaline granite Rhyolite...Spitzkoppe Plutonic Granite Erongo Volcanoplutonic Okorusu Plutonic Cape Cross Plutonic Etaneno Plutonic |  | | Journal (article/letter/editorial) | | minerals, particularly certain species from Tsumeb in Namibia and the Kalahari manganese field in South Africa...shown here for the first time. Examples are from Namibia, South Africa, Zimbabwe, and Tanzania. All the... Reproduced with permission Reproduced with permission Namibia Reproduced with permission Reproduced with permission...Blue willemite and white dolomite, 6.5 cm, Tsumeb mine. The blue willemite fluoresces bright yellow, and...the UV source; Tsumeb mine. Field of view is 2.2 cm. Figure 3. The Skorpion mine is located close to the |  | | Book | | .,,., ..,,.... w + ..... . ·. .... . - Namibia Zauberwelt edler Steine und Kristalle ooa Dieses...Erdgeschichte 8 Zur Geschichte des Bergbaus in Namibia 17 Der Brandberg und die Mineralfunde in seiner...110 Auf Turmalinsuche in Namibia Die Demantoide von Tubussis in Zentral-Namibia 112 116 Sodalith von...Zeolithe vom GrootbergpaĂ in Namibia Kamphaugit-(Y) von der Rössing-Mine 120 124 126 136 Das Gahnit-Vorkommen...Gahnit-Vorkommen von Okahua, Otjiwarongo-Gebiet 140 Tsumeb: ein Name geht um die Welt ... 143 Guchab, |  | | Catalog/List | | Mineral Shows 1 3 5 BARITE, FLUORITE & TAR Emilio Mine, Caravia, Spain. Fluorite cubes to 14mm. 68x52x29mm... 3 FLUORITE with SCHORL inclusions on QUARTZ, Erongo, Namibia. 68x67x37mm. ÂŁ38 6 NATIVE GOLD Gympie...Queensland, Australia. 37x23x28mm. ÂŁ235 9 CALCITE Okorusu, Namibia. 88x53x35mm. ÂŁ42 4 PYROMORPHITE Saint Salvy...Erongo, Namibia. Main crystal 42mm. 47x33x33mm. ÂŁ135 maliastr 2 CASSITERITE Pendarves Mine, Camborne...Morocco. 45x31x18mm. ÂŁ24 13 RED QUARTZ "Eisenkiesel" Orange River, Namibia. Crystals to 25mm. 80x67x53mm |  | | Journal (article/letter/editorial) | | these specimens. Localities such as Erongo in Namibia and the Kalahari manganese field in South Africa...still producing mineral specimens. The NâChwaning mine is especially noteworthy for minerals collected...a contract to legally recover specimens at this mine. Some of the specimens shown here originated from...goethite that originates from the Vergenoeg fluorite mine located northeast of Pretoria, South Africa (see...Apart from aquamarine, the Erongo Mountains in Namibia have also produced some of the best and most unusual |  | | Catalog/List | | â-S~~----- 1 CHRYSOBERYL, Espirito Santo, Southeast Region, Brazll. Sixling twinned crystal. 38x30x19mm. ...locality. 53x42x13mm. ÂŁ38 3 VESUVIANITE, Jeffrey Mine, Richmond County, Quebec, Canada. Apple green crystals..., . ·~, ~- .. ,;. _,,\ 4 EPIOOTE, Xichang Mine, Sichuan Province, China. Attractive gemmy olive... 6 APATITE, C-Francolite"), Simm's Lode, Geevor Mine, St Just, Cornwall. Gemmy golden honey xtls to 3mm...mineral. 102x74x5.5mm. ÂŁ32 10 FLUORITE, Okorusu Mine, Erongo, Namibia. Attractive purple green cubes to 30mm |
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Okorusu Mine, Otjiwarongo Constituency, Otjozondjupa Region, Namibia