 | Chevychelov, V. Yu., Borodulin, G. P., Zaraisky, G. P. (2010) Solubility of columbite, (Mn, Fe)(Nb, Ta)2O6, in granitoid and alkaline melts at 650–850°C and 30–400 MPa: An experimental investigation. Geochemistry International, 48 (5) 456-464 doi:10.1134/s0016702910050034 | Journal (article/letter/editorial) | | Vol. 48, No. 5, pp. 485–495. Solubility of Columbite, (Mn, Fe)(Nb, Ta)2O6, in Granitoid and Alkaline...Sciences, Chernogolovka, Moscow oblast, 142432 Russia email: chev@iem.ac.ru Received November 10, 2008...Abstract—This paper reports experimental data on columbite solubility in model watersaturated Li and Frich...of alumina and alkalis. It was found that the columbite solubility is strongly affected by melt composition...subaluminous and peraluminous melts at the contact with columbite are lower by at least an order of magnitude. The |  | | Journal (article/letter/editorial) | | Museum, Russian Academy of Sciences, Moscow, 125009 Russia *e-mail: a.tkachev@sgm.ru Received December 21...albite-spodumene rare-metal pegmatites with tantalite-columbite, microlite, and ixiolite in the Ancient Gneiss...tantaloniobates. They are usually tantalite and/or Ta-rich columbite, but a noticeable, sometimes decisive contribution...(58) Dajishan; (59) Yichun; (60) Orlovka; (61) Etyka; (62) Baihuanao; (63) Kougarok; (64) Toongi; (65)...Taghawlor Xianghualing Dajishan Yichun Orlovka Etyka Baihuanao Kougarok Toongi Baerzhe P P P G G G G |  | Bezmen, N. I., Gorbachev, P. N., Viryus, A. A., Salova, T. P. (2015) Solubility of ZrO2, HfO2, Ta2O5, Nb2O5, and H2O + H2 in fluid-saturated haplogranite melt at 100 MPa, 800°C, and variable redox conditions. Geochemistry International, 53 (6) 565-571 doi:10.1134/s0016702915060026 | Journal (article/letter/editorial) | | Sciences, Chernogolovka, Moscow oblast, 142432 Russia email: bezmen@iem.ac.ru Received November 20,...2002), Orlovka deposit (Badanina et al., 2010), and Etyka deposit (Beskin et al., 1994). The origin of raremetal...solubility of minerals containing rare metals (columbite, tantalite, zircon, hafnon, etc.) in fluidbearing...concerned with the sol ubility of their minerals (columbite, tantalite, hafnon, and zircon) in Li–F granite...21 wt % Nb2O5 were obtained in experiments on columbite sol ubility in Li–F granites with an agpaitic |  | | Journal (article/letter/editorial) | | latest stages of magmatic crystallization, and columbite can originate from recrystallization of mica....is often attributed to the crystallization of columbite–tantalite [(Mn2?, Fe2?) (Ta, Nb)2O6] (Linnen and...could be responsible for early saturation of columbite–tantalite in pegmatites. The purpose of this paper... 150 nk 250 Sn (Yin et al. 1995) Orlovka, Russia Ta-granite 140 nk 150 200 1.3 100 Ma—millions...phases. The primary ore mineral in Ta deposits is columbite– tantalite (Linnen et al. 2012). A number of studies |  | | Journal (issue) | | concentration in rare-element granites and pegmatites from Russia………………………………………………………………..4 BARROS, R., MENUGE..., RODA-ROBLES, E., VILLASECA, C., SIMMONS, W. Fe-Mn-(Mg) distribution in primary phosphates and silicates...the South Sangilen pegmatite belt, Tyva Republic, Russia…………………………………………………………………………………..68 LIMA, A., DIAS... USA………………………………………………………………………………129 SIRBESCU, MN., C. Comparative fluid chemistry of internaylly-zoned...Products of Ca-metasomatism of Sc-enriched columbite-(Mn) from NYF pegmatite Kožichovice II, Czech Republic |  | | Journal (volume) | | (Czech Republic) (Romania/USA) (Germany) (Hungary) (Russia) (Czech Republic) (Japan) (Germany) Publication...this was nicely shown for the case of oxidation of Mn(II) by bacteria [5]. Due to the rather low absorption...significant adsorption of heavy metals such as Pb, As, Mn, and Fe, and loss of alkali and alkali earth metals...Inst. of Silicate Chemistry RAS, St. Petersburg, Russia (*rimma_bubnova@mail.ru) 2 Dept. of Crystallography...St. Petersburg State University, St. Petersburg, Russia 1 Nowadays borates are well known as advanced |
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