Informace o publikaci
REY plus ACT redistribution in polymineral aggregates: a case study on monazite decomposition in pegmatite
| Autoři | |
|---|---|
| Rok publikování | 2024 |
| Druh | Článek v odborném periodiku |
| Časopis / Zdroj | Review of the Bulgarian Geological Society |
| Fakulta / Pracoviště MU | |
| Citace | VASSILEVA, Rossitsa D, Sylvina GEORGIEVA, Jan CEMPÍREK, Georgi MILENKOV a Radek ŠKODA. REY plus ACT redistribution in polymineral aggregates: a case study on monazite decomposition in pegmatite. Review of the Bulgarian Geological Society. Bulgarian Academy of Sciences, 2024, roč. 85, č. 3, s. 124-127. ISSN 0007-3938. Dostupné z: https://dx.doi.org/10.52215/rev.bgs.2024.85.2.124. |
| www | https://bgd.bg/REVIEW_BGS/REVIEW_BGD_2024_2/PDF/16_Vassileva-1_REV-BGS_2024-2.pdf |
| Doi | http://dx.doi.org/10.52215/rev.bgs.2024.85.2.124 |
| Klíčová slova | pegmatite; monazite-(Ce); allanite-(Ce); complex multimineral aggregates |
| Popis | Selected pegmatite dyke intruded within the gneiss-marble-amphibolite sequence of the Rhodope Metamorphic Complex was studied for its REY+ACT mineralization in attempt to assess the potential of these pegmatites for critical and strategic raw materials. Mineral composition of K-feldspar and albite is complemented by abundant common accessories of zircon, apatite, monazite, allanite, and titanite. The REY+ACT mineralization is presented as single euhedral crystals (zircon, thorianite, Y-Nb oxide, titanite and fluorapatite) or as complex multimineral nodule-like aggregates. The nodule core typically consists of decomposed Th-bearing monazite-(Ce) altered to different degree by intergrown Th-bearing apatite/thorite assemblage. Fluid-involved reactions led to mineral transformations and redistribution of the elements like LREE, Y, Th, U, and formation of the inhomogeneous allanite-(Ce)/REE-epidote rims enveloping the aggregated earlier phases. |