 | | Journal (article/letter/editorial) | | subsolidus compositional trends of columbite–tantalite in the beryl–columbite Šejby granitic pegmatite, Czech...Comenius University, Ilkovičova 6, 842 15 Bratislava, Slovakia; st.chladek@seznam.cz Corresponding author...author The simply zoned Šejby pegmatite of beryl–columbite subtype is enclosed in migmatitized gneisses –...Complex, Bohemian Massif, Czech Republic. The columbite-group minerals (CGM) occur mostly in blocky K-feldspar...K-feldspar unit. Primary magmatic CGM [columbite-(Fe)−tantalite-(Fe)], show an interesting compositional |  | Yin, Rong, Wang, Ru Cheng, Zhang, Ai-Cheng, Hu, Huan, Zhu, Jin Chu, Rao, Can, Zhang, Hui (2015) CHEMICAL EVOLUTION AND LATE-STAGE RE-EQUILIBRATION OF Zr-Hf-U-BEARING COLUMBITE-GROUP MINERALS IN THE KOKTOKAY NO. 1 GRANITIC PEGMATITE, ALTAI, NORTHWESTERN CHINA. The Canadian Mineralogist, 53 (3) 461-478 doi:10.3749/canmin.1400091 | Journal (article/letter/editorial) | | LATE-STAGE RE-EQUILIBRATION OF Zr-Hf-U-BEARING COLUMBITE-GROUP MINERALS IN THE KOKTOKAY NO. 1 GRANITIC...pegmatite, columbite-group minerals (CGMs) not only display variations in Nb/Ta and Fe/Mn, but also are...crystallization and evolution of this pegmatite. Columbite-group minerals record large variations in Ta/(Nb...values (0.06–0.98) and moderate variations in Mn/(Fe + Mn) values (0.58–0.99), which could be a result...%. However, primary tantalite-(Mn) with Ta/(Nb + Ta) and Mn/(Fe + Mn) values of 0.63–0.98 and 0.86–0 |  | | 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 |  | Sun, Wenli, Zhao, Zhidan, Mo, Xuanxue, Wei, Chunjing, Dong, Guochen, Li, Xiaowei, Yuan, Wanming, Wang, Tao, Yang, Shuang, Wang, Bingzhang, Pan, Tong, Han, Jie, Cao, Hongliang, Tang, Yan, Zhang, Liangliang (2023) Age and Composition of Columbite-Tantalite Group Minerals in the Spodumene Pegmatite from the Chakabeishan Deposit, Northern Tibetan Plateau and Their Implications. Minerals, 13 (2) 201 doi:10.3390/min13020201 | Journal (article/letter/editorial) | | minerals Article Age and Composition of Columbite-Tantalite Group Minerals in the Spodumene Pegmatite...major-element composition, and U-Pb dating of columbite-tantalite group minerals (CGMs) in the spodumene...g., tourmaline [13,14], muscovite [15,16] and columbite-tantalite group minerals (CGMs) [17–19]. The Tibetan...rare-metal pegmatite dykes. The most fascinating region is the Tianshuihai-Songpan-Ganze terrane in the...related to Proand U-Pb isotope of CGMs (AB2 O6 , A = Mn, Fe, B = Nb, Ta) in the spodumene-bearing to-Tethys |  | Anderson, M. O., Lentz, D. R., McFarlane, C. R. M., Falck, H. (2013) A geological, geochemical and textural study of an LCT pegmatite: implications for the magmatic versus metasomatic origin of Nb-Ta mineralization in the Moose II pegmatite, Northwest Territories, Canada. Journal of GEOsciences, 58 (4) 299-320 | Journal (article/letter/editorial) | | occur in the central portions of the pegmatite. Columbite–tantalite minerals occur throughout the pegmatite...chemical patterns demonstrate an evolution from columbite to tantalite, whereby the Ta/(Ta + Nb) ratio increased...with progressive fractionation (0.13–0.59) but the Mn/(Mn + Fe) ratio remained nearly constant (0.15–0.31)...chemical evolution of the Nb- Ta oxides from columbite to tantalite is consistent with crystallization...“supercritical” fluid. Keywords: Moose II pegmatite, columbite–tantalite, Nb–Ta chemical evolution, muscovite |  | | Journal (issue) | | , RODA-ROBLES, E., VILLASECA, C., SIMMONS, W. Fe-Mn-(Mg) distribution in primary phosphates and silicates... USA………………………………………………………………………………129 SIRBESCU, MN., C. Comparative fluid chemistry of internaylly-zoned...Beryl in the West-Carpathian granitic pegmatites, Slovakia: compositional variations and post-magmatic alteration...Products of Ca-metasomatism of Sc-enriched columbite-(Mn) from NYF pegmatite Kožichovice II, Czech Republic...differentiation of granitic magmas related to plutons in the region, or independently of plutonism by low-volume crustal |  | | Book | | the same passion for minerals and the NE Bavarian region. The Oberpfalz was his home and my adopted country...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...mining was the reason for people to settle in a region but likewise the focal point of geoscientists to...extending from Switzerland, through Austria into Slovakia, this crustal section is host to a great variety |  | | Journal (volume) | | of Szeged On the cover: Map of the Carpathian region with type localities of new mineral species, rocks...Mineralogical Society of Romania Geological Society of Slovakia, Mineralogical-Geochemical Branch Eötvös Loránd...(Romania) (Romania) (Austria) (Croatia) (Hungary) (Slovakia) (Greece) (Hungary) (USA) (Hungary) (Egypt) (Austria)...(Hungary) (Hungary) (Hungary) (Croatia) (Hungary) (Slovakia) (Serbia) (South Africa) (Austria) (France) (Hungary)...(Hungary) (Hungary) (Croatia) (UK) (Slovakia) (USA) (Austria) (Romania) (Slovakia) (China) (Germany) (Poland) |
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