 | | 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 |  | | 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...young rifts in eastern and central Africa, in Namibia (South West Africa), and in Angola and is associated...deposit of Namibia. Stockworks of fluorspar in granite are mined extensively at the Buffalo Mine in South |  | | Journal (issue) | | 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 â˘Westcott mine, though a few good finds were made in the two ad...⢠⢠â˘, :. ⢠I Originally started as a copper mine in the latter part of the 1800s, the workin¡gs at |  | BĂźhn, 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. BuĚhn 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...than recorded for the fluorites and associated Okorusu carbonatite. Crush analysis of the bulk quartz |  | | 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 |  | BĂźhn, 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...BuĚhn et al. Fig. 1. Geology of the Okorusu carbonatite complex, Namibia (after Van Zijl, 1962). modification...country rock marbles of the Cretaceous Okorusu carbonatite complex, Namibia. Here, vein-type fluorite mineralization...magmatic activity in the Damaraland igneous province, Namibia, lasted from âŹ137 to 124 Ma, and is thought to...metaluminous silicate rocks and peralkaline granite. The Okorusu carbonatite complex consists of alkaline silicate |  | | 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 | | 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 |  | | 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 (issue) | | (Dodecahedron) with Quartz, Erongo Mountains, Namibia, 2.5 x 2.6 x 2.4 cm, Jeff Scovil photo, Alex Schauss...Club. This led to all kinds of field trips in the region, including one of my first trips to collect Herkimer...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 |  | | Journal (issue) | | Jebel Ouichane, Sagangane, Nador Province, Oriental Region, Morocco. Doug Fiske collection; Jordan Root photo...row, from left: Euclase, 2.3 cm, from the GachalĂĄ mine, GuaviĂł-GuatĂŠque mining district, BoyacĂĄ Department...Budd photo. Tanzanite, 7.6 cm, from the Merelani mine near Arusha, Tanzania. Barry & Beth Kitt collection;...Fluorite on quartz, 13 cm, from the Yaogangxian mine, Chenzhou Prefecture, Hunan Province, China. The...Spodumene (variety kunzite), 9 cm, from the Urucum mine, GalilĂŠia, Minas Gerais, Brazil. Gus & Jane Eifler |  | | Journal (issue) | | with Mimetite on Barite 5.1 cm, from the Rowley mine, Maricopa County, Arizona. Dick Morris collection;...explore literally thousands of mineral occurrences, mine dumps and abandoned mines in the public domain administered...Heintzelman (1805-1880) shipped ore specimens from his mine to be exhibited at the Cincinnati Merchant's Exchange...later when Edwin Over paid a visit to the Red Cloud mine and made one of history's most spectacular wulfenite...discovery at tbe Red Cloud mine, Ed Over moved on in 1939 to investigate tbe Hilltop mine in Cochise County. |  | | Book | | relationship to beneficiation problems at Okorusu, Namibia Hagni, RD 297 Ore microscopic study of copper...losses from mining of bornite ores in the Sweetwater Mine, Viburnum Trend, Southeast Missouri Hagni, RD 307...oxidation and mobilization of arsenic in the Ketza River mine tailings Paktunc, D, Thibault, Y, and Weisener,... Understanding micro-environment development in mine tailings using MLA and image analysis Redwan, M...iron-rich sediments of Benavi Area in Kurdistan Region â Northern Iraq Yassin, AT and Mahmoud, MM 781 |  | | Report (issue) | | A fluorite specimen from the Number 1 (Minerva) Mine, Cave-in-Rock subdistrict, Illinois-Kentucky fluorspar...............................................G31 Mine Waste Characteristics.........................................................................G36 Mine Closure...........................................a fluorite specimen from the Number 1 (Minerva) Mine, Cave-in-Rock subdistrict, Illinois-Kentucky fluorspar...Selected examples of the chemistry and mineralogy of mine waste generated at fluorspar mines............. |  | | Journal (issue) | | localities like the Sweet Horne mine, Breckenridge, Mount Antero, the Sunnyside mine, Creede, Cripple Creek,...Collection" labels list the name of the lade or mine, the mining district and county, and the assay results...thread, some taken from the surface of the American mine and some from its deepest workings indicating that...that depth does not change the character of the mine. One is impressed by the money as well as the scientific...quartz, interspersed with gold, but the owner of the mine, Mr. Walker, seeing the cabinet, said that the piece |  | | Journal (issue) | | However 70% of the wines produced are red in this region. The river Rhone occupies a rift valley, which...through what turned out to be the remnants of an old mine dump. When I unearthed two stones unlike anything...specimens to be found on the mine dumps. In fact I did not know there were any mine dumps to collect from!...Cornwall subsequently became a favourite haunt of mine and the main focus of my collection. It also became...collecting trips. Their eye sight was better than mine and they were also closer to the ground! -6- SMLS |  | | Report (issue) | | fluorite gemstone cut from rough originating in Okorusu, Namibia. Collection Warren Taylor; photo Jeff Scovil...Brian Stefanec explores a pocket at the Elmwood mine. Photo Mark Kielbasa Switzerland BY HANS ANTON...MICHAEL GRAY 54 Elmwood-Gordonsville-Cumberland Mine Complex Of Eastern Tennessee BY ARVID PASTO 56...Castleton in Traek Cliff (Derbyshire), the Blue John mine (page 35). The term "fluorite" was coined in 1797...The Blue John Mine, Castleton. In Modern Terms A postcard depicting the Blue John mine near Castleton |  | | Journal (issue) | | 1987). Channels in the studied stone contain no limonite colouring and therefore very strong iridescence...Vishnevye Mts. in the Urals, a famous pegmatite region about 100 km south of Ekaterinberg, were purchased...exploration potential that exists in the surrounding region. Historical background Archaeologically, nephrite...were promoted as the principle nephrite-producing region for the Soviet Bloc countries and this appears...structural high and the oldest tectonic element in the region. These Precambrian rocks are unconformably overlain |  | | Catalog/List | | is native to the warm seas of the Indo-Pacific region and known traditionally to the Pacific Islanders...in this fine specimen, relatively large for the region. The undulating interior of the geode is lined...FLUORESCENT WILLEMITE AND CALCITE Sterling Hill Mine, Ogdensburg, New Jersey Willemite with calcite is...THREE-COLOR FLUORESCENT FRANKLIN CLASSIC Franklin Mine, Franklin Borough, Sussex Co, New Jersey Purple-fluorescing...found elsewhere in minor traces in a Bolivian tin mine, for example, but Franklin is likely the only locality |  | | Catalog/List | | 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 CTââ 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...PYROMORPHITE Daoping Mine, Gongcheng Co., Guilin Prefecture, Guangxi Zhuang Autonomous Region, China Daoping |  | | Journal (article/letter/editorial) | | carhonatites with oversaturated magmatism such as in Namibia. Angola, and the East African rift system. Despite...Phanerozoic Cameron Niger Nigeria Sudan Saudi Arabia Namibia 1. Introduction Most of the African continent...1986). Thus the most important feature of this region is the sequential development of granitic rock...for the temporal evolution of the Saudi Arabian region during Upper Proterozoic to early Phanerozoic times...almost identical age range to the mixed province in Namibia, with oversaturated magmatism close to the coast |  | | Catalog/List | | of Crystallized Gold from the famed Eagleâs Nest Mine in California A superb Crystallized âLeafâ Gold...gemstone Amethyst to come from the famed Four Peaks Mine in Arizona A sharp and complicated Crystallized...Crystallized Silver with Copper from the famed Wolverine Mine in Michigan A âclassicâ Rhodochrosite with associated...associated Pyrite and Quartz from the Sweet Home Mine in Colorado An unusually massive and extremely colorful...colorful, Smithsonite from the iconic Kelly Mine in New Mexico A âgemâ quality specimen Tanzanite crystal in |  | | Book (edition) | | localities as inclusions in the limestoneââ (italics mine). Actually, the first published description of...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted...constituents of some of the massifs in the Meimecha-Kotui region of northern Siberia. ALKALIC CARBONATITIC COMPLEXES...Mountain, Mrima Hill, Rangwa, Spitskop. In the Tuva Region, U.S.S.R., some carbonatitic complexes contain... Ontario, Bukusu and Budeda, Uganda, and Okorusu, South-West Africa); see Fig. 2-12. In this |  | | Catalog/List | | CATHEDRAL â MATCHED PAIR Rio Grande do Sul, South Region, Brazil This organically shaped Amethyst geode...AMETHYST & FELDSPAR Brandberg District, Erongo Region, Namibia The size as well as the presence of accessory... 38009ââ ROSE QUARTZ ON QUARTZ Minas Gerais, Southeast Region, Brazil Deep pink Rose Quartz crystals are situated...CATHEDRAL â MATCHED PAIR Rio Grande do Sul, South Region, Brazil Gracefully curving upward, the interior...of Fredrico Westphalen, Rio Grande do Sul, South Region, Brazil The sparkling interior of this matched |
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