 | 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) | | UniversitaĚt Bern, Baltzerstrasse 3, 3012 Bern, Switzerland Naturhistorisches Museum der Burgergemeinde Bern...Bern, Bernastrasse 15, 3005 Bern, Switzerland c Dipartimento di Scienze Geologiche e Geotecnologie, UniversitaĚ...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 |  | | Journal (article/letter/editorial) | | Geochemistry, Mineralogy and Microbiology of Molybdenum in Mining-Affected Environments Francesca Frascoli...January 2018; Published: 25 January 2018 Abstract: Molybdenum is an essential element for life, with growing...contamination in surrounding areas. In mine wastes, molybdenum is liberated from sulfide mineral oxidation...waters, or taken up in secondary minerals such as powellite and wulfenite at neutral to alkaline pH. To date...Mo-metabolising bacteria have been isolated from mine wastes. However, laboratory and in-situ experiments |  | Liu, Zhifei, Zuo, Ling, Xu, Senmin, He, Yaqing, Wang, Chunyi, Wang, Luofeng, Yang, Tao, Wang, Gongwen, Zeng, Linggao, Mou, Nini, Yang, Wangdong (2022) 3D Multi-Parameter Geological Modeling and Knowledge Findings for Mo Oxide Orebodies in the Shangfanggou PorphyryâSkarn Mo (âFe) Deposit, Henan Province, China. Minerals, 12 (6) 769 doi:10.3390/min12060769 | Journal (article/letter/editorial) | | wangluofeng1@126.com (L.W.); kinkye@163.com (T.Y.) China Molybdenum Co., Ltd., Luoyang 471500, China; heyq@cn.cmoc...porphyryâskarn deposit located in the East QinlingâDabie molybdenum (Mo) polymetallic metallogenic belt in the southern...products of molybdenite are dominated by tungstenâpowellite at the supergene stage. Thus, a series of oxidation...oxidation processes from molybdenite to tungstenâpowellite are obtained after the precipitation of molybdenite;...secondary oxide orebody dominated by tungstenâpowellite. (2) Under hydrothermal action, Mo4+ can be oxidized |  | Skierszkan, E.K., Mayer, K.U., Weis, D., Roberston, J., Beckie, R.D. (2019) Molybdenum stable isotope fractionation during the precipitation of powellite (CaMoO4) and wulfenite (PbMoO4) Geochimica et Cosmochimica Acta, 244. 383-402 doi:10.1016/j.gca.2018.09.030 | Journal (article/letter/editorial) | | Manuscript Molybdenum stable isotope fractionation during the precipitation of powellite (CaMoO4) and...Beckie, R.D., Molybdenum stable isotope fractionation during the precipitation of powellite (CaMoO4) and...pertain. Molybdenum stable isotope fractionation during the precipitation of powellite (CaMoO4) and...isotope fractionation during the precipitation of powellite (CaMoO4) and wulfenite (PbMoO4). These minerals...sinks of dissolved Mo, especially in alkaline-pH mine drainage. Their precipitation might be traceable |  | | Journal (article/letter/editorial) | | 68, 1973, pp. 681-696 Originof the Scheelite-Powellite Seriesof Minerals L. C. Hsu AND P. E. GALLt Abstract...commonassociations in pegmatites. The scheelite-powellite seriesis essentiallya binary solid solutionof...containsmore than 0.05 mole percentCaMoOâ˘. Primary powellite is not found in any of the three main occurrences...for the study of the powellite (CaMoOi) componentto form a of the scheelite-powellite series. It is the...distinctivechangein fluorescent chemistryof the scheelite-powellite series collected colorsfrom blue when the scheeliteis |  | | Journal (article/letter/editorial) | | Auburn University Auburn, Alabama 36849-5305 Powellite Downloaded by [North Carolina State University]...Choice is powellite, the molybdate equivalent of the much more familiar mineral scheelite. Powellite, named...past twenty-one years, however, unusually fine powellite crystals have been found sporadically with abundant...by Kothavala (1982). Mineralogical details of powellite from this location can be found in Hurlbut (1982)...Like scheelite, to which it is closely retated, powellite is variable in color, ranging from colorless through |  | | Journal (article/letter/editorial) | | has been recognized as one of the more abundant molybdenum minerals in the oxidized zone of the Chuquicamata...to find it in analogousenvironments in other molybdenum-bearing copper deposits,as in the porphyry copper...collected on the dump of the upper tunnel of the Helena mine (SE ] sec. 25, T. 21 N., R: 3 W., Boise Meridian)...shoots of copper ore with subordinate amounts of molybdenum and tungsten minerals typical of the contactmetamorphic...molybdenite has been altered to pseudomorphs of powellite (CaMoO+) that preserve not only the external form |  | | Report (issue) | | BULLETIN 76 Molybdenum Resources of New Mexico by JOHN H. SCHILLING 1965 STATE BUREAU OF MINES AND................................. 11 GEOLOGY OF MOLYBDENUM ........................................................................................... Molybdenum minerals ......................................................................... Porphyry-molybdenum deposits ......................................18 19 20 20 21 22 22 22 23 23 24 NEW MEXICO MOLYBDENUM OCCURRENCES .............................. Petaca |  | | Journal (article/letter/editorial) | | APPLICATION OF HYDROCHEMICAL SURVEY TO COPPER AND MOLYBDENUM DEPOSITS IN THE ARMENIAN S.S.R. N. I. Dolukhanova...APPLICATION OF HYDROCHEMICAL SURVEY TO COPPER AND MOLYBDENUM DEPOSITS IN THE ARMENIAN S.S.R., International...APPLICATION OF HYDROCHEMICAL SURVEY TO COPPER AND MOLYBDENUM DEPOSITS IN THE ARMENIAN S.S.R.' by N. 1. Dolukhanova...of Florida] at 14:25 09 June 2016 Molybdenum and copper-molybdenum ore concentrations may be detected...technique. A general chemical description of molybdenum, the various mineral forms in which it occurs |  | | Journal (article/letter/editorial) | | molybdate bearing minerals including wulfenite, powellite, lindgrenite and iriginite have been analysed...paragenetic relationships between the minerals. The molybdenum bearing minerals lindgrenite, iriginite and koechlinite...Raman spectra. Key words: lindgrenite, iriginite, powellite, wulfenite, molybdate, Raman spectroscopy. Introduction...molybdate bearing minerals such as wulfenite and powellite is made. Minerals The following minerals were...Antofagasta Province, Chile Lindgrenite â Superior Mine, Globe-Miami District, Gila County, Arizona Iriginite |  | | Journal (article/letter/editorial) | | 1980 Prmted an Crrai Brtta~n Geochemistry of molybdenum in some stream sediments and waters DAWN S...with respect 10 ferrimolybdite. molybdenite. powellite. and ilsemannite. The MO in the stream water occurs...of MO in waters and sediments downstream from the mine at Climax, Colorado; (ii) determination of the form...rivers downstream derives from the mine and mill at Climax. OF MOLYBDENUM Introduction The ore deposit...sedlmcnts extend at least 80 km below Climax. Molybdenum anomalies of up to 50 /lg g Mo in the and |  | | Journal (article/letter/editorial) | | METHOD FOR DETERMINING MEMBERS OF THE SCHEELITE-POWELLITE SERIES F. H. S. Vnnlaaes,Geological Suruey,Pretoria...difiraction angles to witlllin 1/6. INrnolucrron Powellite (CaMoOa), although less common than scheelite...also at Minusinsk, Siberia. Scheelite free from molybdenum is very rare in nature, the replacement of W...powellites. These indications that scheeliteand powellite may form an isomorphous series is strongly supported...contained more than 2 per cent MoOa. Neither natural powellite nor other intermediate members of the postulated |  | | Journal (article/letter/editorial) | | Bruce Cairncross specimen and photo. The Tsumeb mine, in northern Namibia, according to Moore (2016...structural relationships to wulfenite so that powellite, scheelite, and stolzite all occur at Tsumeb,...his wulfenite specimens to deeper levels of the mine. Ramdohr (1939, p. 256), in republishing Kleinâs...considered to be common in the upper levels of the mine. Most specimens of wulfenite that are unequivocally...as relatively common in the upper levels of the mine. Kleinâs collection (purchased by Harvard University |  | | Journal (article/letter/editorial) | | Depressant/Collectors System for the Separation of Powellite from Dolomite and the Interaction Mechanism Yunlou... Abstract: The flotation beneficiation of powellite from dolomite was achieved with a new reagent...adsorption of NaOl and BHA on the powellite surface. Keywords: powellite; selectivity; mixed collector;...flotation 1. Introduction Powellite [CaMoO4 ], an important oxide molybdenum mineral that serves as an...alternative source to supply the increasingly depleted molybdenum [MoS2 ] resource, is often concentrated by flotation |  | | Journal (article/letter/editorial) | | Proterozoic molybdenites have altered to Re-enriched powellite, which can be detected using back-scattered electron...seconds with 10 seconds background counting. Molybdenum was analyzed on a PET crystal using the La line...mineralization ( CREASEY and KISTLER, 1962 ) . At the Ajo mine, the 63 Ma mineralizing stock was intruded by a...for molybdenite (light gray, lower right) with powellite (dark gray, upper left) alteration rim from Xamchab...from weathering. Gravelotte, South Africa Morenci Mine, AZ %BR*wt %Re IR FOG.7. (a) Schematic cross-section |  | | Journal (article/letter/editorial) | | contains moderate amounts of molybdenum (<3 wt % MoO3), which give powellite mole proportions of up to 6...at Kara is by open cut and operated by Tasmania Mine NL Limited. Mining has concentrated on the Kara...Moina Sandstone unit is extensively exposed in the mine area and is massive to weakly bedded, coarse to...granite intrusion and contains skarns (Fig. 3). Mine geologists consider the syncline to plunge gently...minor faults have been mapped and interpreted by mine geologists. Most of the faults tend to displace |  | | Journal (article/letter/editorial) | | calcium molybdate and calcium tungstate; ratio of powellite to scheelite mineralization under hydrothermal...calcium molybdate and calcium tungstate; ratio of powellite to scheelite mineralization under hydrothermal...calcium molybdate and calcium tungstate ratio of powellite to scheelite mineralization under hydrothermal...A characteristic feature of the mineralogy of molybdenum and tungsten in deposits of different genetic...mineralization and the subordinate character of powellite mineralization. Under conditions of hypogene mineral |  | | Journal (volume) | | and Andy Hopkirk 86 90 Linarite from Cononley Mine, Skipton, North Yorkshire John Chapman and David...Andy Hopkirk and J. A. Charles Lamb 101 111 Powellite in the British Isles: assessing a Kingsbury ďŹrst...from localities such as Tynagh Mine in Co. Galway and Pendarves Mine in Cornwall (Figs 1 and 2) serves...between 4 and 5 levels on Tryphena Lode, Pendarves Mine, Cornwall. The ďŹeld of view is 2.7 mm across. Jean...2.2 mm across, on deep blue azurite from Tynagh Mine, Co. Galway. Jean Spence collection. Photo John |  | | Journal (article/letter/editorial) | | and Mo attenuation by waste-rock mixing in neutral mine drainage using mixed-material ďŹeld barrels and humidity...neutral pH drainage from waste rock at the Antamina mine in Peru. We hypothesized that Mo or Zn contained...marble waste rock Mo was removed from solution. Molybdenum attenuation was not observed when the order of...drainage Metal attenuation Molybdenum Zinc Field barrel 1. Introduction Mine managers are increasingly...management or mine closure plans (Kwong, 2003). Mixing different waste-rock types from the same mine site may |  | | Journal (article/letter/editorial) | | Acta, 23, 167(1950). POWELLITE AND ASSOCIATED PSEUDOMORPHS AT THE ANDERSON MINE, MINERAL COUNTY. NEVADA...minerals observed in the deeper levels of the Champion mine are chalcopyrite, bornite, sphalerite, pyrite, a...The accessibleworkings in the adjacent Anderson mine weie all in the oxide zone. In these upper levels...the absenceof bismuth. Molybdenum was proved by semi-micro reduction to molybdenum blue and confirmation...tin. Thus a calcium molybdate conformable with powellite is indicated. The age sequencein relation to the |  | | Journal (article/letter/editorial) | | produced significant quantities of copper and molybdenum until closing in the 1920âs. Extensive collecting...prospects have produced copper in association with molybdenum, uranium and silver. We first visited this area...and cornubite. Figure 2. Scene of the El Dorado mine collapsed adit. LOCATION The copper mines of the...in the district included the Mohawk (Last Chance) mine, with a total output of over 1,000 tons of 6% chalcopyrite...(Dufay) mine, which produced one carload of high-grade ore, and the Murdock (Plumas Jumbo) mine, with a |  | Wan, He, Yang, Wei, Cao, Weicheng, He, Tingshu, Liu, Yanying, Yang, Jianbo, Guo, Lin, Peng, Yongjun (2017) The Interaction between Ca2+ and Molybdenite Edges and Its Effect on Molybdenum Flotation. Minerals, 7 (8) 141 doi:10.3390/min7080141 | Journal (article/letter/editorial) | | Ca2+ and Molybdenite Edges and Its Effect on Molybdenum Flotation He Wan 1,2, *, Wei Yang 1, *, Weicheng...710055, China; hetingshu@xauat.edu.cn JinDuiCheng Molybdenum Co., Ltd., Xiâan 710077, China; cao_wch@163.com...com (W.C.); liuyanying@126.com (Y.L.) China Molybdenum Co., Ltd., Luanchuan 471500, China; yangjb@chinamoly...influence of Ca2+ on the flotation of a skarn type molybdenum ore and pure molybdenite mineral at pH 8 was... It was found that Ca2+ had little effect on molybdenum flotation at low concentrations. By further increasing |  | | Journal (article/letter/editorial) | | Anthropole, UNIL Dorigny, CH-1015 Lausanne, Switzerland a r t i c l e i n f o Article history: Received...SulďŹde oxidation a b s t r a c t Prevention of acid mine drainage (AMD) in sulďŹde-containing tailings requires...1994; Jambor et al., 2003). The kinetics of acid mine drainage (AMD) formation depends on water ďŹux, oxygen...1999; Gould and Kapoor, 2003). At the surface of mine waste, evaporation commonly concentrates mobile...Hammarstrom et al., 2005; Smuda et al., 2007). Within mine waste, J. Smuda et al. / Chemical Geology 256 |  | Solongo, Tsetsgee, Fukushi, Keisuke, Altansukh, Ochir, Takahashi, Yoshio, Akehi, Akitoshi, Baasansuren, Gankhurel, Ariuntungalag, Yunden, Enkhjin, Odgerel, Davaajargal, Boldbaatar, Davaadorj, Davaasuren, Hasebe, Noriko (2018) Distribution and Chemical Speciation of Molybdenum in River and Pond Sediments Affected by Mining Activity in Erdenet City, Mongolia. Minerals, 8 (7) 288 doi:10.3390/min8070288 | Journal (article/letter/editorial) | | Article Distribution and Chemical Speciation of Molybdenum in River and Pond Sediments Affected by Mining...and ponds near the Erdenet mine, one of the worldâs largest copper-molybdenum mines, exhibit high concentrations...concentrations of molybdenum (Mo). This study evaluates the distribution and chemical speciation of Mo in...sinks of Mo in the area. Keywords: Erdenet mine; molybdenum; sediment; chemical speciation; XAFS; sequential...expect that Mongolia has many active mine blocks. At Erdenet mine (Erdenet city, Mongolia), one of the |  | | Journal (article/letter/editorial) | | 158 Powellite .from Traprain Law, Haddingtonshire, Scotland. By M. H. BATTEY, M.Sc., Ph.D. Geology Department...History). [Taken as read 25 January 1962.] Summary. Powellite, appearing to be of primary late-magmatic origin...first British crystal of the uncommon mineral powellite (CaMo04) , which has been recognized in a geode...Ennos, Geol. Mag., 1922, vol. 59, p. 514. ON POWELLITE 159 covered with triangular plates. These interior...coated with calcite moulded on the striations. The powellite is greenish black in the mass, with a submetallic |
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