 | | Report (issue) | | ....................................... 2 World Mine Production .......................................chemical properties that are very similar to those of niobium. A refractory metal, tantalum is ductile, easily...Information Services Ltd., 2012). World Mine Production In 2011, world mine production of tantalum increased...total mine production in 2011; Brazil accounted for 20 percent; the Democratic Republic of the Congo [Congo...together accounted for 47 percent of the world’s mine production of tantalum. The locations of significant |  | | Journal (article/letter/editorial) | | pp. 3?7-404 THE ECONOMIC GEOLOGY OF COLUMBIUM AND OF (NIOBIUM) TANTALUM NICOLAS DE KUN CONTENTS...developmentof carbonatitedeposits,the resourcesof columbium have been increasedto rank in importancewith the...Americanminingindustrycallselement41 "columbium," U.S. chemists have however chosen "niobium." The rest of the world...world prefers"niobium." The historyof the two metalsshowsfive phases:1) discoveryin pegmatires, where...discoveryof pyrochlore in carbonatites (Arax/t, 1947; Lueshe,1956) whichset up columbiumas one of the major |  | | Report (issue) | | Strategic Minerals Inventory Summary Report-Niobium (Columbium) and Tantalum Prepared as a cooperative effort...Strategic Minerals Inventory Summary Report-Niobium (Columbium) and Tantalum By Richard N. Crockett and...strategic minerals inventory summary report-niobium (columbium) and tantalum I by Richard N. Crockett and...America." Includes bibliographical references. 1. Niobium ores. 2. Tantalum ores. 3. Strategic materials...inventory information about major deposits of niobium and tantalum, two of the mineral commodities selected |  | Chakhmouradian, Anton R., Reguir, Ekaterina P., Kressall, Ryan D., Crozier, Jeremy, Pisiak, Laura K., Sidhu, Ravinder, Yang, Panseok (2015) Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): Mineralogy, geochemistry and petrogenesis. Ore Geology Reviews, 64. 642-666 doi:10.1016/j.oregeorev.2014.04.020 | Journal (article/letter/editorial) | | elsevier.com/locate/oregeorev Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada):...April 2014 Available online xxxx Keywords: Aley niobium deposit Carbonatite Metasomatic rocks Pyrochlore-group...lesser extent, amphibole. When the passive margin of North America became the zone of plate convergence in...Elsevier B.V. All rights reserved. 1. Introduction Niobium is a relatively rare lithophile transition metal...Chakhmouradian, A.R., et al., Carbonatite-hosted niobium deposit at Aley, northern British Columbia (Canada): |  | | Journal (article/letter/editorial) | | ARTICLE Geology, market and supply chain of niobium and tantalum—a review Duncan A. R. Mackay & George...Crown Copyright 2014 Abstract Tantalum (Ta) and niobium (Nb) are essential metals in modern society. Their...% from tin slag refining and 10 % from secondary mine concentrates. Due to rapid industrialisation and...Canada account for about 92 and 7 % of Nb world mine production, respectively. Since the bulk of the...sources of supply for strategic reasons. Keywords Niobium . Tantalum . Rare-elements . Strategic metals |  | | Book (edition) | | localities as inclusions in the limestone”’ (italics mine). Actually, the first published description of...‘‘fine-grained but crystalline,” (5) that they were 1] thank Dr. G. R. Udas for bringing this historic description...carbonatite dikes cutting the kimberlite of the Premier mine (p. 542) he classed as magmatic, but 1 Bowen admitted...G. B. Du Bois (1956, 1959), B. C. King (1949). Congo (Belgian): A. Meyer and P. de Bethune (1958, 1960)...) around a “core” of alkalic silicate rock: Lueshe, Congo, and Chishanya, Southern Rhodesia. In some cases |  | | Report (issue) | | Niobium and Tantalum Chapter M of Critical Mineral Resources of the United States—Economic and Environmental...strontium 87.62 yttrium 88.91 zirconium 91.22 niobium 92.91 molybdenum 95.96 technetium (98) ruthenium...Photograph by Roger Weller, Cochise College. Niobium and Tantalum By Klaus J. Schulz, Nadine M. Piatak...Schulz, K.J., Piatak, N.M., and Papp, J.F., 2017, Niobium and tantalum, chap. M of Schulz, K.J., DeYoung..............................................M2 Niobium............................................... |  | | Journal (article/letter/editorial) | | such as Light Rare Earth Elements, vanadium, niobium, zirconium, fluorite and phosphate. At the Pianciano...obtained from a new local mine. In the 1980s, the location of the mine, called ‘gold mine’, was recognised to...catastrophic earthquakes of 1703 and 1730, this mine district was abandoned. Locardi and Orsini (1990)...from Northern Latium to Rome (Fig. 1b). To the north, in CE the Vulsini volcanic complex, the largest...Lithos 98, 313-334. CE Dawson, K.R., 1974. Niobium (columbium) and tantalum in Canada. Geological Survey |  | | Journal (article/letter/editorial) | | conducted a multilateral study of titanium- and niobium-bearing minerals, including a petrographic study...to the generation of Nb-rich brookite (the main niobium concentrator in the Petyayan-Vara) and minerals...the pyrochlore group. This process also caused niobium enrichment with of early generations of Ti oxides...Keywords: metasomatism; brookite; anatase; pyrochlore; niobium; carbonatites; Vuoriyarvi massif 1. Introduction...late carbonatites. More than 99% of the world’s niobium (Nb) is also Geosciences 2018, 8, 281; doi:10 |  | | Journal (volume) | | Minerals Diamonds in Basutoland Carbonatite in Kivu, Belgian Congo Forthcoming Increase in Price of this Bulletin...CORRESPONDENCE The Itiaso Series of Western Tanganyika. From Dr. R. B. McConnell and C. B. Bisset 249 , 497 PERSONALIA...COLONIAL OFFICE PUBLICATION Geology of the Colony of North Borneo BY MAX REINHARD , PH.D. , AND EDUARD WENK...Special Reference to Work in the Colonies " , by Dr. F. Dixey 85 Colonial Mineral Production 85 Mineral...London and the field geologists in a Colonial territory. The investigation started in the Photo geological |  | | Report (volume) | | Ce)Zr(TiNbh01------------- SERIALS Abs. North Am. Geol.-Abstracts of North American Geology. United States Geological...Bibliography and index of geology exclusive of North AmericaGeological Society of America Bibliography...Bibliography and index of geology exclusive of North America. Baltimore, Md. Geol. Soc. America Bull.-Geological...Nederlandse Akademie van Wetenschappen Proceedings. North-Holland Publishing Company. Amsterdam, Netherlands...Oslo, Norway. North Carolina Dept. Conserv. and Devel. Div. Mineral Resources BulL-North Carolina Department |  | | Book | | minerals were named when Zaire was called the Belgian Congo; this old term and similar ones are retained in...chemist and mineralogist; student of Torbern Bergman; mine owner and mineral analyst; trained J. J. Berzelius...and naturalist; professor at the University of North Carolina (1818—1857); author of Elements of Geology...California), perloffite (Louis Perloff, Tryon, North Carolina), yedlinite (Neal Yedlin, New Ha¬ ven,...made the first nonstop flight from Moscow via the North Pole to the United States, 1937. Francisco Vasquez |  | | Report (issue) | | Asbestos . . Bariveows we Beryllium. Chromium Columbium Copper ... Fluorspar . Gralla se sre Graphite...holdings. Prior to 1978, the development of complete mine property cost evaluations was impeded by still evolving...tool. Systems design work also continued on the mine simulation (MINSIM) program, an economic evaluation...Fluorspar Gold Graphite Iron Lead Lithium Magnesium Columbium Copper Mercury on Manganese Additional deposits...reserves. These include implications that because a mine is operating it is profitable, that reported reserves |  | | Report (issue) | | strontium 87.62 yttrium 88.91 zirconium 91.22 niobium 92.91 molybdenum 95.96 technetium (98) ruthenium...tungsten, rare-earth elements, and antimony in China; niobium in Brazil; and platinum-group elements in South...(Hf), indium (In), lithium (Li), manganese (Mn), niobium (Nb), platinum-group elements (PGE), rare-earth...commodities–for example, graphite, manganese, niobium, and tantalum—the United States is currently wholly...................................L1 Chapter M. Niobium and Tantalum By Klaus J. Schulz, Nadine M. Piatak |  | | Report (issue) | | ---------------------·-----------------------Niobium (columbium) and tantalum, by Raymond L. Parker and John...must know not only in which direction a particular mine opening should be extended to continue in an ore...deposits of Paleozoic and Precambrian age in Eastern North America permits us to speculate that whole new regions...changing as the advance of technology permits us to mine or process minerals that were once too low in grade...technologic advances will make it profitable to mine resources that would be much too costly to produce |  | | Book | | compiled (as were the following twenty Lists) by Dr L J Spencer, with the object of providing a convenient...arose from the collaboration of one of us (PGE) with Dr Hey in the preparation of recent Lists, and a recognition...Society of Great Britain and by their present compiler, Dr M H Hey. It should be noted in this connection that...1939), which attracted the comment in a review by Dr L J Spencer: ‘Much of the infor¬ mation has been...Magazine and Abstracts’ (M.A. 7, 313). We also thank Dr Hey for his encouragement and many helpful comments |  | | Book | | sills), if they are exposed in outcrop or in the mine workings at all. The Climax Mo complex is the best...Buddington (1959) in his classical paper on the North American granites, proposed a three-fold depth subdivision...Verde district; in the centre, Morococha and in the north, Michiquillay) straddle the intrusive contacts and...faults, often in swarms, trending E.-W. in the north-eastern portion of the batholith. They are parallel...known (e.g. the Montana Tunnels deposit, Obelisk Mine). The former locality contains disseminated pyrite |  | | Report (volume) | | of Documents. ANCHORAGE, Alaska--4230 University Dr., Rm. 101 ANCHORAGE, Alaska--605 West 4th Ave., Rm...Virginia--National Center, Rm. 1C402, 12201 Sunrise Valley Dr. SALT LAKE CITY, Utah--Federal Bldg., Rm. 8105,125...based on considerations that extend far beyond the mine itself, in some instances relating to the overall...subject, as in a scale model of the workings of a mine, to a unifying concept that explains or describes...government believed might someday be economic ta mine. Stratiform deposits of large areal extent, such |  | | Book | | sills), if they are exposed in outcrop or in the mine workings at all. The Climax Mo complex is the best...Buddington (1959) in his classical paper on the North American granites, proposed a three-fold depth subdivision...Verde district; in the centre, Morococha and in the north, Michiquillay) straddle the intrusive contacts and...faults, often in swarms, trending E.-W. in the north-eastern portion of the batholith. They are parallel...known (e.g. the Montana Tunnels deposit, Obelisk Mine). The former locality contains disseminated pyrite |  | | Report (issue) | | EJEMPLOS High Plateau, Del Norte County, USCA Goto Mine, Luzon, PLPN (Wells y otroa, 1946) (LeBlano y Violette...Nombre Ace of Spades Adobe Canyon Gp. Ajax Alice Mine Allan (Johnson) Alta Hill Althouse Alyce and Blue...etc Buttercup Chrome Camden Mine Campbell Camptonville area Castro Mine Cattle Springs Cavyell Horse...Cleopatra Clover Leaf Codd Prospect Coggins Collard Mine Commander Coon Mt. Nos. 1-3 Copper Creek (Low Divide)...Fourth of July French Hill Friday Gallagher Gardner Mine Gas Canyon Geach Gibaonville Gill (Gill Ranch) Gillan |  | | Book (edition) | | • t --•- """"" ' The Lornex copper-molybdenum mine and plant, Highland Valley, British Columbia. (By...many exploration geologists as there are in all of North America. The organization of the first two editions...measurements have been retained in specific cases such as mine levels when measured in feet, values of gold and...developing an annual ton of new copper capacity from mine through the refinery without intrastructure costs...fold in three years. As an example, the " Surface Mine Control and Reclamation Act,' ' which was initially |
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