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Dostęp zamkniętyExtreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula
| dc.abstract.en | An unusual hydrothermal alteration scheme was presented for chevkinite-(Ce) from the White Tundra pegmatite (2656 ± 5 Ma), Keivy massif, Kola Peninsula. Pb-CO2-rich fluids initially removed REE and Y from the chevkinite-(Ce), with enrichment in Pb and U. PbO abundances reaching 17.35 wt%. Continued alteration resulted in the altered chevkinite-(Ce) being progressively transformed to a Pb-Ti-Fe-Si phase, which proved, upon EBSD analysis, to be almost totally amorphous. Pb enrichment was accompanied by a loss of LREE, especially La, relative to HREE, and the development of strong positive Ce anomalies. A notably U-rich aeschynite-(Y), with UO2 values ≤7.67 wt%, crystallized along with the chevkinite-(Ce). Aeschynite-(Y) with a lower UO2 value (3.91 wt%) and bastnäsite-(Ce) formed during alteration. The formation of bastnäsite-(Ce) rather than cerussite, which might have been expected in a high Pb-CO2 environment, is ascribed to the fluids being acidic. |
| dc.affiliation | Uniwersytet Warszawski |
| dc.contributor.author | Jokubauskas, Petras |
| dc.contributor.author | Kotowski, Jakub |
| dc.contributor.author | Bagiński, Bogusław |
| dc.contributor.author | Zozulya, Dmitry |
| dc.contributor.author | Stachowicz, Marcin |
| dc.contributor.author | Macdonald, Ray |
| dc.date.accessioned | 2024-01-25T00:14:47Z |
| dc.date.available | 2024-01-25T00:14:47Z |
| dc.date.issued | 2022 |
| dc.description.finance | Środki finansowe, o których mowa w art. 365 pkt. 2 ustawy |
| dc.description.number | 8 |
| dc.description.volume | 12 |
| dc.identifier.doi | 10.3390/MIN12080989 |
| dc.identifier.uri | https://repozytorium.uw.edu.pl//handle/item/106887 |
| dc.identifier.weblink | https://www.mdpi.com/2075-163X/12/8/989/pdf |
| dc.language | eng |
| dc.pbn.affiliation | earth and related environmental sciences |
| dc.relation.ispartof | Minerals |
| dc.relation.pages | 989 |
| dc.rights | ClosedAccess |
| dc.sciencecloud | nosend |
| dc.subject.en | White Tundra pegmatite |
| dc.subject.en | Pb-rich chevkinite-(Ce) |
| dc.subject.en | CO2-bearing hydrothermal fluids |
| dc.subject.en | amorphous Pb-Ti-Fe-Si phase |
| dc.title | Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula |
| dc.type | JournalArticle |
| dspace.entity.type | Publication |