 | Greber, Nicolas D., Hofmann, Beda A., Voegelin, Andrea R., Villa, Igor M., Nägler, Thomas F. (2011) Mo isotope composition in Mo-rich high- and low-T hydrothermal systems from the Swiss Alps. Geochimica et Cosmochimica Acta, 75 (21) 6600-6609 doi:10.1016/j.gca.2011.08.034 | Journal (article/letter/editorial) | | Universität Bern, Baltzerstrasse 3, 3012 Bern, Switzerland Naturhistorisches Museum der Burgergemeinde Bern...Bern, Bernastrasse 15, 3005 Bern, Switzerland c Dipartimento di Scienze Geologiche e Geotecnologie, Università...online 31 August 2011 Abstract We analyzed the molybdenum (Mo) isotope compositions (IC) of 59 samples...samples from two molybdenite mineralizations (Alpjahorn and Grimsel) and from a Mo-rich hydrothermal breccia...breccia (Grimsel) from the Aar Massif, Switzerland. The formation temperature of the Late Paleozoic Mo mineralizations |  | Birch, W. D., Grey, I. E., Mills, S. J., Bougerol, C., Pring, A., Ansermet, S. (2007) Pittongite, a new tungstate with a mixed-layer, pyrochlore hexagonal tungsten bronze structure, from Victoria, Australia. The Canadian Mineralogist, 45 (4) 857-864 doi:10.2113/gscanmin.45.4.857 | Journal (article/letter/editorial) | | Mineralogy, UNIL–BFSH2, CH–1015 Lausanne–Dorigny, Switzerland Abstract Pittongite, (Na,H2O)x[(W,Fe)(O,OH)3]...3–0.5 mm) platy crystals on etched blades of ferberite up to 4 cm long, enclosed in massive white reef...reef quartz. It has formed by alteration of ferberite in a supergene environment in the presence of oxidizing...oxidizing, acidic solutions containing Na. The ferberite occurs in several hydrothermal quartz reefs, along...très minces (0.3–0.5 mm) posées sur des lames de ferberite atteignant une longueur de 4 cm, encaissé dans |  | | Report (volume) | | ......................................... 21 Ferberite.................................................Wedge-shaped ferberite crystals from "Crow patent," Nederland, Colo.; B, Crystallized ferberite with elongated...from Nugget mine, Gilpin County, Colo.-................... II. A, Wedge-shaped ferberite crystals from...from Hoosier mine, Nederland, Colo.; B, Cuboid ferberite crystals from Georgia A. mine, Nederland. Colo...A very fine specimen of ferberite with rhombic crystal faces, from Nugget mine, Gilpin County, Colo.. |  | | Journal (article/letter/editorial) | | tungsten mine at Panasqueira, Portugal (fig. l), with its unusually high-quality ferberite, apatite,...academic community. An outstanding Panasqueira ferberite, typical of the best material available in the...as this issue’s Connoisseur’s Choice (fig. 2). Ferberite is a black, dense (specific gravity 7.3-73, brittle...cleavage and uneven fracture. Figure 1. Panasqueira mine dumps in the distance; photo by John S. White, 1977...brownish-black to black streak. It is weakly magnetic. Ferberite is monoclinic (2/m), typically forming elongated |  | | Journal (article/letter/editorial) | | August 2017 Smith Mine, Newport, New Hampshire. Calcite occurs elsewhere at the Harding Mine, New Mexico....pseudomorphs after hurlbutite crystals at the Smith Mine, Newport, New Hampshire. RHODOCHROSITE, manganese...carbonate occurs in compact masses at the Stewart mine at Pala, California. A mass of intergrown beyerite...hundred pounds. It is also common in the Harding mine pegmatite of Taos County, New Mexico. From a number...McKinney mine near Little Switzerland, North Carolina. It has also been found at the Etta mine near Keystone |  | | Journal (article/letter/editorial) | | Tungsten Resources and Potential Extraction from Mine Waste Zhengdong Han , Artem Golev * and Mansour...Tungsten Resources and Potential Extraction from Mine Waste. Minerals 2021, 11, 701. Abstract: Tungsten...some toxic elements. In 2020, the world’s tungsten mine production was estimated at 84 kt of tungsten (106...tungsten primary and secondary resources, and tungsten mine waste, including its environmental risks and potential...3390/min11070701 Keywords: tungsten resources; mine waste; recycling; wolframite; scheelite Academic |  | | Journal (article/letter/editorial) | | THE TUNGSTEN AND MOLYBDENUM ORES OF THE WESTERN GREATER CAUCASUS-GENETIC CLASSIFICATION AND MINERALIZATION...Burgunker ABSTRACT It is argued that the tungsten and molybdenum ores of the Caucasus region are probably associated...demonstrated, however, that Cenozoic tungsten and molybdenum ores are negligible, if they are present in the...evidence. --M. E. Burgunker. * ** The study of the molybdenum and tungsten ores of the Greater Caucasus is...present paper studied the distribution patterns of molybdenum and tungsten ores in the region between 1955 |  | | Journal (article/letter/editorial) | | Ottens specimen and photo. The Yaogangxian Tungsten Mine Downloaded by [Florida International University]...of all tungsten produced. Although most artisanal mine laborers are categorized as farmers for statistical...specimen production is probably the Yaogangxian mine in Hunan Province. Geography Figure 4. Preparing...other important mining centers. The Yaogangxian mine is located in Yizhang County, Chenzhou Prefecture...Province (figs. 2, 3, 5). The mine has followed a series of ferberite-bearing quartz veins and associated |  | Williams, P. A., Leverett, P., Sharpe, J. L., Colchester, D. M., Rankin, J. (2005) Elsmoreite, cubic WO3 · 0.5H2O, a new mineral species from Elsmore, New South Wales, Australia. The Canadian Mineralogist, 43 (3) 1061-1064 doi:10.2113/gscanmin.43.3.1061 | Journal (article/letter/editorial) | | observed) formed as a result of the oxidation of ferberite in the oxidized zone of weakly mineralized granitic...(éclat non observable) formés par oxydation de la ferberite dans des filons de pegmatite granitique contenant...cassiterite, with accessory amounts of molybdenite, ferberite, arsenopyrite, minor chalcopyrite and native bismuth...During a study of secondary bismuth, tungsten and molybdenum minerals in the upper sections of the veins (Rankin...2002), we found a white encrustation on corroded ferberite to be identical to synthetic, cubic WO3•0.5H2O |  | | Journal (article/letter/editorial) | | tabular crystals as an alteration product of ferberite. The physical and optical properties of hydrotungstite...of a ((massiveyellow oxid of tungsten" at Lane's Mine, near Huntington, Connecticut. This material was...material. Dr. E. A. Lucas, Vice-President of the Molybdenum Corporation of America, has generously cooperated...According to the latter the chief ore mineral is ferberite which occurs with pyrite and stibnite in a quartzsiderite...alteration product along cleavagesand fractures of the ferberite. Physi.cal Properties : Tungstite occurs as rounded |  | Wang, Xin-Song, Timofeev, Alexander, Williams-Jones, A.E., Shang, Lin-Bo, Bi, Xian-Wu (2019) An experimental study of the solubility and speciation of tungsten in NaCl-bearing aqueous solutions at 250, 300, and 350 °C. Geochimica et Cosmochimica Acta, 265. 313-329 doi:10.1016/j.gca.2019.09.013 | Journal (article/letter/editorial) | | used to model the solubility of scheelite and ferberite. This modeling indicates that tungsten concentrations...(1991). Thermodynamic data for the tungsten and molybdenum oxide solids (WO3, MoO2 and MoO3) were taken...simplicity, we represent wolframite by its endmember, ferberite (FeWO4). Thermodynamic data for the minerals were...participate in the formation of scheelite and ferberite, respectively. In fact, Wood and Samson (2000)...scheelite or ferberite saturation. The results of this modeling show that scheelite and ferberite both precipitate |  | | Journal (article/letter/editorial) | | mineralization: U–Pb age for hübnerite (MnWO4), Sweet Home Mine, Colorado Rolf L. Romer *, Volker Lüders GeoForschungsZentrum...particularly porphyry molybdenum and Sn-specialized granites. Hübnerite from the Sweet Home Mine (Alma, Colorado)...Ma (2r). Late stage apatite from the Sweet Home Mine yields a 206Pb/204Pb–238U/204Pb isochron corresponding...Hübnerite from the Sweet Home Mine (Alma mining district, Colorado) The Sweet Home Mine, located in the Alma mining...19th century. The mineralization of the Sweet Home Mine is hosted by Precambrian igneous and metamorphic |  | | Journal (article/letter/editorial) | | stated that a plant is being built near Visp in Wallis, Switzerland, capable of an annual production of 100...sufficient to cover the whole requirement of Switzerland." PURIFYING OILY MATERIALS Deodorizing fatty...gaseous nature. For the production of tungsten and molybdenum the tri oxides of the metals WOs (tungstic acid)...sheets. MANUFACTURE OF TUNGSTEN AND MOLYBDENUM Tungsten and molybdenum in the early stages of their his...part of the nineteenth century, tungsten and molybdenum were produced by reduction from their oxides |  | | Report (issue) | | per million (ppm), about the same as tin and molybdenum, and half as plentiful as uranium. Its oceanic...(WO3 %) 76.3 Specific gravity (g/cm3 ) 7.5 Ferberite FeWO4 Wolframite (Fe,Mn)WO4 76.5 7.1-7.5...periodic table, which also includes chromium and molybdenum. It exhibits oxidation states from +6 to -2 and...isomorphous6 substances ferrous tungstate or ferberite (FeWO4), and manganous tungstate or hübnerite...intermediate 20-80 per cent range between the ferberite and hübnerite end-member compositions. Some basic |  | Fitzpatrick, Robert, Hegarty, Patrick, Fergusson, Keith, Rollinson, Gavyn, Xie, Weiguo, Mildren, Treve (2018) Optimisation of a Multi-Gravity Separator with Novel Modifications for the Recovery of Ferberite. Minerals, 8 (5) 191 doi:10.3390/min8050191 | Journal (article/letter/editorial) | | with Novel Modifications for the Recovery of Ferberite Robert Fitzpatrick 1, *, Patrick Hegarty 1 , Keith...efficiency of Wolf Minerals’ Draklends mine, a major European tungsten mine, by recovering saleable material...enhanced gravity concentrator. The mine hosts wolframite and ferberite as the main tungsten bearing mineral...recovery of tungsten at the Drakelands mine, a major European mine site operated by Wolf Minerals Ltd. Specifically...Tantalum Lithium Tellurium Chromium Natural Teak… Molybdenum Tin Magnesite Iron ore Feldspar Potash Sulphur |  | | Journal (article/letter/editorial) | | is surrounded by alterations of porphyry type molybdenum deposits, such as propylitic alteration. Potassic...(hübnerite) to Mn-poor and Fe-rich wolframite (ferberite) (Table 1 and Fig. 5). In some places, a compositional...zoned crystal, in which hübnerite is rimmed by ferberite. This variation may indicate changes in temperature...(hübnerite) to Mnpoor and Fe-rich wolframite (ferberite). Cassiterite Cassiterite is the third most abundant...Leitch, C.H.B. (1983) Geology of the Trout Lake molybdenum deposit, B.C. CIM Bulletin, 79, 115-124. Brown |  | | Report (issue) | | == Elbaite “mushroom,” 4 cm, from the Palelni mine, Molo village, Momeik Township, Kyaukme District...==== of the rare brochantite of the Los Azules mine in Chile: spherical tufts of emerald-green fibrous...matrix. Brochantite, 4.8 cm, from the Los Azules mine, Quebrada San Miguel, Copiapo Province, Atacama...pseudomorphous after chalcocite from the Las Cruces mine near Seville in southern Spain: you’ll perhaps recall... newly recovered chalcocite specimens from that mine to the 2020 Tucson Show (see the show report in |  | | Journal (article/letter/editorial) | | Granitoid Environments: I. Relative Solubilities of Ferberite and Scheelite as a Function of T, P, pH, and mNaCl...Experimentally derived thermodynamic data for scheelite, ferberite, aqueous Ca, Fe, and W species, and other required...The simultaneous solubilities of scheelite and ferberite in NaCl-HCl-H2O solutions were calculated at temperatures...following: (1) solubilities of scheelite and/or ferberite can attain values as high as hundreds to thousands...concentration in equilibrium with scheelite and ferberite increases strongly with increasing temperature |  | | Journal (article/letter/editorial) | | only 0.09 v, half the electrode potential of-molybdenum. Tungsten crystals have body-centered cubic...the electronic configurations of tungsten and molybdenum (2). The energy levels of orbitals 45, 4p, 5s...the energy levels of corresponding orbitals in molybdenum. In tungsten the energy level of the 4d orbital...much lower than that of the 5s orbital but in molybdenum the energy levels of these orbitals are nearly...energy levels of 5p, 5d, and 6s orbitals, while in molybdenum it is much higher. Finally, the energy level |  | | Journal (article/letter/editorial) | | mineralised veins are mostly composed of quartz and ferberite. The ore microscopy studies of the polished sections...confirmed ferberite as the main W mineral in the quartz veins. Ilmenite occurs within the ferberite crystals...composition of W and Sn minerals to correspond to ferberite as the main W ore mineral together with some scheelite...columbitetantalite and the association of indium and molybdenum traces with scheelite. The analysed monazites...hydrothermal Fe2+ to produce ‘reinite’ which is a ferberite polycrystalline pseudomorph. The occurrence of |  | | Journal (issue) | | coal mine in SW Wyoming. Facies of Tidal Origin, Eastern New York.’ Our trip leadThere a huge mine face...School of Mines “Geology of a Climax-type porphyry molybdenum deposit and base-metal mineralized system, Mount... » CONTINUED ON PAGE 37 Beautiful, striated ferberite euhedra with prismatic quartz crystals from Ayopaya...formed from a complete solid-solution between Ferberite (FeWO4) and Hübnerite (MnWO4). Pure Fe2+ and Mn2+...coated with bladed-, wedge- and chisel-shaped, ferberite civilized world. Wolframites are monocrystals |  | | Report (volume) | | Silicified rocks................................ Ferberite-bearing breccia....................... Placer...claim.......................................... Lela mine....................................... Pruneda shaft...Tourmalinized breccia........................ 196 Coarse ferberite ore......................... 204 Geologic map...Geologic map of the 125-foot and 225-foot levels, Lela mine, Isla de Pinos, Cuba..............................Pinos, Cuba............ 228 Detailed map of the ferberite breccia area on the Lela claim, Isla de Pinos |  | Števko, Martin, Sejkora, Jiří, Malíková, Radana, Ozdín, Daniel, Gargulák, Milan, Mikuš, Tomáš (2017) Supergénne minerály z kremeňovej žily s Mo-W mineralizáciou pri Ochtinej, Spišsko-gemerské rudohorie (Slovenská republika) [Supergene minerals from quartz vein with Mo-W mineralization near Ochtiná, Spišsko-gemerské rudohorie Mts. (Slovak Republic)]. Bulletin Mineralogie Petrologie, 25 (1) 43-54 | Journal (article/letter/editorial) | | quartz vein with Mo-W mineralization (Mg-rich ferberite to huanzalaite, molybdenite and pyrite are dominant...closely constrained to accumulations of weathered ferberite. It mostly forms greenish-yellow to bright yellow...after aggregates and crystals of ferberite or coatings on altered ferberite, in both cases very often associated...hydrotungstite up to 4 mm in size growing on altered ferberite in drusy cavities of quartz. The unit-cell parameters...mineral, always closely associated with altered ferberite. It forms orange to brownish-yellow fine-crystalline |  | | Journal (article/letter/editorial) | | MANGANESE-IRON RATIOS IN WOLFRAMITE, SOUTH CRAFTY MINE, CORNWALL Sir: The recentpaper by R. G. Taylor...example,may havea hubnerite-rich centralzone with a ferberite-richouter fringe. This zoningis independent of...metals have been found in commercialquantities. Ferberite occurs with both zinc and lead ores. The zoning...zoning of wolframitein tin-tungstenand molybdenum-tungsten depositsappearsto justify not presentin economic |  | | Journal (article/letter/editorial) | | MANGANESE-IRON RATIOS IN WOLFRAMITE, SOUTH CRAFTY MINE, CORNWALL Sir: The recentpaper by R. G. Taylor...example,may havea hubnerite-rich centralzone with a ferberite-richouter fringe. This zoningis independent of...metals have been found in commercialquantities. Ferberite occurs with both zinc and lead ores. The zoning...zoning of wolframitein tin-tungstenand molybdenum-tungsten depositsappearsto justify not presentin economic |
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