... ), which is not consistent with dynamic recrystallization. The high concentrations of Y-REE-Nb in titanite-(I) and their highly heterogeneous distributions may contribute to the early breakdown of titanite besides fluid availability. Niobium, in particular, is more compatible in rutile than titanite...

... Day of the Geological Society of India on 28 th May 2024. Niobium is classified as strategic mineral which has wide industrial applications. It is widely used in metallurgical industry, in superconducting materials, atomic energy, aerospace industry etc. The exploration and production of Nb...

...Lan Yang; Yang Li; Yu Liu; Xiao-Xiao Ling; Li-Guang Wu; Yan Yu; Li Yang; Wen-Xiang Meng; Guo-Ying Yan; Xian-Hua Li Abstract The Bayan Obo deposit hosted by the H8 unit is a world-class rare earth element (REE) deposit with considerable niobium (Nb) and iron (Fe). Permian granites are widely exposed...

...Rong-Lin Ma; Wei Terry Chen; Yan-Wen Tang Abstract Although carbonatite-alkaline complexes are the primary source of the world’s niobium (Nb) supply, the mineralization style is largely variable in these complexes and the processes behind their formation are still poorly understood. Exemplifying...

... calcalkaline and high-niobium basalts from Turrialba Volcano, Costa Rica: implications for residual titanates in arc magma sources . Journal of Geophysical Research: Solid Earth , 94 , 4619 – 4633 , https://doi.org/10.1029/JB094iB04p04619 Rolland , Y. , Galoyan , G. , Bosch , D. , Sosson...

..., normally with ill-defined or apparently absent zoning; the latter was better developed in tens of centimeter- to meter-sized bodies, which almost invariably have a cavity instead of a filled core. carlosbarbosaite A-type granite NYF miarolitic pegmatites fluorine-rich niobium mobility uranium...

... contained as substituent in other carbonates. Niobium is with [71 x] the most enriched element in all tailings, while the enrichment of other HFSE is minor (Th [22 x], U [9.4 x], Ta [4.8 x]). The enrichment of Th and U can be explained, partly, by the presence of Th- and U-bearing carbonates and monazite...

...Quentin Bollaert; Mathieu Chassé; Hebatalla Elnaggar; Amélie Juhin; Alexandra Courtin; Laurence Galoisy; Cécile Quantin; Marius Retegan; Delphine Vantelon; Georges Calas Abstract The systematic mineralogy of niobium (Nb) is complex, with more than one hundred species dominated by multicomponent...

..., requiring specific processes to fractionate ( Green 1995 ). Nonetheless, niobium-tantalum-oxide minerals (NTO) commonly record considerable degrees of Nb/Ta fractionation in pegmatitic systems (e.g., Černý and Ercit 1985 ; Beurlen et al. 2008 ; Wise et al. 2012 ; Fuchsloch et al. 2019 ). This can...

...–68.4 wt% (mean 62.7 wt%), Al 2 O 3 = 14.6–23.2 wt% (mean 18.5 wt%), and MgO = 2.1–3.4 wt% (mean 2.6 wt%). Heat-producing elements (e.g., K, Th, U) have consistent and relatively high concentrations (K 2 O = 2.3–4.4 wt%, U = 0.6–2.1 ppm, and Th = 10.4–18.6 ppm). Niobium concentrations range from 12.8...