 | | Journal (article/letter/editorial) | | fractionation in rare-metal granites: Krásno-Hornà Slavkov ore district, Czech Republic Miloš René & Radek Škoda ...Nb-Ta-Ti-bearing oxide minerals (Nb-Ta-bearing rutile, columbite-group minerals) represent the most common Nb-Ta...related rocks from the Krásno-Hornà Slavkov ore district. Tungsten-bearing columbite-(Fe), W-bearing ixiolite...represented mostly by columbite-(Fe) and rarely by columbite-(Mn), with Mn/(Mn+Fe) ratio ranging from...the Mn/(Mn+Fe) ratio is 0.42–0.51, whereas the coexisting tapiolite-(Fe) has a distinctly lower Mn/(Mn+Fe) |  | | Journal (article/letter/editorial) | | Sciences of the Czech Republic, V Holešovičkách 41, 182 09 Prague 8, Czech Republic; rene@irsm.cas.cz;...Abstract: Oxide minerals (Nb–Ta-rich rutile, columbite-group minerals and W-bearing ixiolite) represent...and also topaz- and Li-mica-bearing granite. Columbite group minerals occur usually as euhedral to subhedral...zoning. These minerals are represented by columbite-(Fe) with Mn/(Mn + Fe) ratio ranging from 0.07 to 0.15...crystals. The ixiolite is Fe-rich with relatively low Mn/(Mn + Fe) and Ta/(Ta + Nb) values (0.10–0.15 and 0 |  | | Journal (article/letter/editorial) | | rare-element class. Moreover, abundant cassiterite and columbite-group minerals crystallized in the Cruz del Rayo...Cruz del Rayo: (i) granite-like pegmatites, with columbite-(Fe) I and II and cassiterite, in which the influence...which contain high amounts of columbite-(Fe), columbite(Mn), tantalite-(Mn) I and II as well as cassiterite...Jálama Batholith, pegmatite dikes, cassiterite, columbite-group minerals Received: 15 December 2011; accepted:...phosphorus contents. Li-rich muscovite or lepidolite, columbite-group minerals, and pyrochloregroup minerals are |  | | Journal (article/letter/editorial) | | Nevada, U.S.A., and the Krásno ore district, Hornà Slavkov, Czech Republic. The host rocks of iangreyite...barite, quartz, and F-rich perhamite. The Krásno ore district is represented by greisen mineralization...underlying metamorphic rock (mainly gneisses). At Krásno, iangreyite is found in white, yellowish, or light...12Cu0.08 Zn0.01P3.64Si0.43F4.65H29.62O34.35 from Krásno. The observed five strongest powder X-ray diffraction...988(1), c = 16.707(3) Å, and V = 706.5(2) Å3 and (Krásno): a = 6.989(1), c = 16.782(4) Å and V = 709.8(2) |  | | Journal (article/letter/editorial) | | minerals Article Occurrence and Composition of Columbite-(Fe) In the Reduced A-Type Desemborque Pluton...Published: 4 May 2020 Abstract: Columbite-(Fe) is a post-magmatic accessory mineral occurring...within both the rocks, named columbite-1 and columbite-2. The columbite-1 type is characterized by zoned...An early Nb-rich cores with low Ta/(Ta + Nb) and Mn/(Mn + Fe) ratios (0.02–0.08 and 0.17 to 0.21 apfu,...higher Ta/(Ta + Nb) ratios (0.11–0.26) and similar Mn/(Mn + Fe) ratios (from 0.14 to 0.22) relative to the |  | | Journal (article/letter/editorial) | | accessory minerals: montebrasite, columbite-(Mn), columbite(Fe), tantalite-(Mn), Ta-bearing cassiterite, U-bearing...up to 150 m in association with tantalite-(Mn), columbite-(Mn), and cassiterite. According to the content...content of WO3 (1.23%–3.33%) and the values of Mn/(Mn + Fet ) and Ta/(Ta + Nb), Yakut wodginite is an intermediate...deposits in Algeria, Egypt, Spain, China, and the Czech Republic [5–16]. As industrial minerals, WGMs are of...(containing cassiterite; columbite; tantalite; phosphates of Li, Al, Ca, and Cu; and columbite; tantalite; phosphates |  | Fosso Tchunte, Periclex Martial, Tchameni, Rigobert, André-Mayer, Anne-Sylvie, Dakoure, Hilaire Somtebda, Turlin, François, Poujol, Marc, Nomo, Emmanuel Negue, Saha Fouotsa, Alliance Nicaise, Rouer, Olivier (2018) Evidence for Nb-Ta Occurrences in the Syn-Tectonic Pan-African Mayo Salah Leucogranite (Northern Cameroon): Constraints from Nb-Ta Oxide Mineralogy, Geochemistry and U-Pb LA-ICP-MS Geochronology on Columbite and Monazite. Minerals, 8 (5) 188 doi:10.3390/min8050188 | Journal (article/letter/editorial) | | Geochemistry and U-Pb LA-ICP-MS Geochronology on Columbite and Monazite Periclex Martial Fosso Tchunte 1...rare-element-bearing mineral is represented by columbite-group minerals (CGM) and other Nb-Ta-oxides (Nb-rutile...minerals). The CGM is classified as Mn-columbite, with Ta# and Mn# ratios increasing from core to rim...The latest stage (CGM-II) is expressed as a Ta-rich Mn hydrothermal CGM episode represented as rims and/overgrowths...cleavage planes of muscovite. The U-Pb dating of columbite and monazite of the Mayo Salah leucogranite indicates |  | Xie, Lei, Wang, Ru-Cheng, Che, Xu-Dong, Huang, Fang-Fang, Erdmann, Saskia, Zhang, Wen-Lan (2016) Tracking magmatic and hydrothermal Nb–Ta–W–Sn fractionation using mineral textures and composition: A case study from the late Cretaceous Jiepailing ore district in the Nanling Range in South China. Ore Geology Reviews, 78. 300-321 doi:10.1016/j.oregeorev.2016.04.003 | Journal (article/letter/editorial) | | study from the late Cretaceous Jiepailing ore district in the Nanling Range in South China Lei Xie, Ru-Cheng...study from the late Cretaceous Jiepailing ore district in the Nanling Range in South China, Ore Geology...study from the late Cretaceous Jiepailing ore district in the Nanling Range in South China PT Lei Xie... ACCEPTED MANUSCRIPT Abstract The Jiepailing mining district in the Nanling range in South China is well-known...we have studied SC RI here, using mineral (columbite, rutile, wolframite, cassiterite, zircon, and |  | | Book (edition) | | comparison of all data (observation wave lengths vary considerably from one publication to the next)....of particular minerals. The associated textures vary from patchy, irregular crack fillings, regular linear...strong very weak 33 Descloizite Sahlinite Columbite-(Fe) few, redbrown fine red yes specs Loveringite...Ilmenorutile Powellite Davidite(Ce, La, Y) Tapiolite-(Mn) Sphalerite Wurtzite Groutite Wolframite Thorianite...Madenköy Mine, Çayeli, Rize Province, Black Sea Region, Turkey (sample: Halbach); XPL If marked in description |  | | Book | | the same passion for minerals and the NE Bavarian region. The Oberpfalz was his home and my adopted country...Bohemian Massif, which is shared by Germany, the Czech Republic, Poland and Austria, has been focused on these...the principal techniques of deep geophysics, this region enables us to look at the origin of pegmatites...to find new profitable mineral deposits in the region are not very promising and mining in Germany is...with much success. The Hagendorf-Pleystein mining district consists of several pegmatites and aplites, including |  | | Book | | transmission IR spectra of minerals in the far IR region. The PE discs are prepared at rather high temperatures...root-mean-square approximation of the spectrum in the region free of strong absorption. A review of the most...analysis for the IR spectrum of gmelinite-K in the region of Si–O-stretching vibrations carried out with...analysis for the IR spectrum of gmelinite-K in the region of Si–O-stretching vibrations carried out with...analysis for the IR spectrum of gmelinite-K in the region of Si–O-stretching vibrations carried out with |  | | Journal (volume) | | of Szeged On the cover: Map of the Carpathian region with type localities of new mineral species, rocks...Mineralogical-Geochemical Branch tional na MA ion Inter at Czech Geological Society I ral ine ogi l Assosi Croatian...(Hungary) (Hungary) (Romania) (Hungary) (France) (Czech Republic) (Croatia) (Hungary) (Poland) (Slovenia) (Bulgaria)...(Poland) (Italy) (Czech Republic) (Romania/USA) (Germany) (Hungary) (Russia) (Czech Republic) (Japan) (Germany)...History of mineralogy: The role of the Carpathian region in the 18th century........................... |
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