 | | Journal (article/letter/editorial) | | Comenius University, Ilkovičova 6, 842 15 Bratislava, Slovakia; st.chladek@seznam.cz Corresponding author...K-feldspar unit. Primary magmatic CGM [columbite-(Fe)−tantalite-(Fe)], show an interesting compositional and textural...evolution. Subhomogeneous cores of columbite-(Fe)−tantalite-(Fe) (A) are surrounded by heterogeneous intermediate...comparable compositions. Zone (B) contains grains of tapiolite-(Fe) and inclusions of pyrite decomposed into a...include patchy-zoned Mn-enriched columbite-(Fe) and late columbite-(Fe) veinlets both formed at the expense |  | | Journal (article/letter/editorial) | | Complex. Cassiterite, rutile, ilmenite and tantalite-(Fe) occur disseminated in the border facies of the External...Rayo: (i) granite-like pegmatites, with columbite-(Fe) I and II and cassiterite, in which the influence...tantalite-(Fe), and (ii) greisen-like bodies, which contain high amounts of columbite-(Fe), columbite(Mn)...crystallization of the secondary assemblage, richer in Fe and Ta, is interpreted mainly as a consequence of...they contain variable but accessory amounts of Mn–Fe–Ca phosphates (Llorens and Moro 2007, 2008, 2012) |  | 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) | | progressive fractionation (0.13–0.59) but the Mn/(Mn + Fe) ratio remained nearly constant (0.15–0.31). The...in particular the columbite–tantalite minerals [(Fe,Mn)(Ta,Nb)2O6]. Many workers have examined these...phases range from simple to complex due to Nb–Ta and Fe–Mn substitutions. The following patterns of internal...(a) MA011B-01 6.2.4. Complex zoning Ta-rich Nb-Fe-rich 200 μm (b) MA011B-02 Truncation Truncation...replace primary ferrocolumbite crystals, and later Nb–Fe-rich and Nb-rich overgrowths (medium grey) replace |  | Roza Llera, Ana, Fuertes-Fuente, Mercedes, Cepedal, Antonia, Martin-Izard, Agustín (2019) Barren and Li–Sn–Ta Mineralized Pegmatites from NW Spain (Central Galicia): A Comparative Study of Their Mineralogy, Geochemistry, and Wallrock Metasomatism. Minerals, 9 (12) 739 doi:10.3390/min9120739 | Journal (article/letter/editorial) | | body show a trend from columbite-(Fe) to tantalite-(Fe) and tapiolite-(Fe). In this body, the Li-aluminosilicate...vanadinite (Cl), andradite (Ca), MnTi (Mn, Ti), magnetite (Fe), apatite (P,F), SnO2 (Sn), ZnS (Zn), AsGa (Ga),...plotted on the triangular diagram as a function of Al (IV + VI)–R2+–Si (apfu), according to [25]. Chemical...almandine– spessartine solid solution with Mn/(Mn + Fe) ratios between 0.31 and 0.42. The most remarkable...almandine–spessartine solid solution with Mn/(Mn + Fe) ratios between 0.31 and 0.42. The most remarkable |  | | 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) |  | | Journal (issue) | | J., RODA-ROBLES, E., VILLASECA, C., SIMMONS, W. Fe-Mn-(Mg) distribution in primary phosphates and silicates...Beryl in the West-Carpathian granitic pegmatites, Slovakia: compositional variations and post-magmatic alteration...differentiation of granitic magmas related to plutons in the region, or independently of plutonism by low-volume crustal...of the features of the continental crust in the region, and in particular the information on its overall... Sr, Nd and Pb isotope data on granites in the region. The continental crust of southern Norway and adjacent |
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