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Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula

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Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula. / Macdonald, R.; Bagiński, B.; Stachowicz, M. et al.
In: Minerals, Vol. 12, No. 8, 989, 03.08.2022.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Macdonald, R, Bagiński, B, Stachowicz, M, Zozulya, D, Kotowski, J & Jokubauskas, P 2022, 'Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula', Minerals, vol. 12, no. 8, 989. https://doi.org/10.3390/min12080989

APA

Macdonald, R., Bagiński, B., Stachowicz, M., Zozulya, D., Kotowski, J., & Jokubauskas, P. (2022). Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula. Minerals, 12(8), Article 989. https://doi.org/10.3390/min12080989

Vancouver

Macdonald R, Bagiński B, Stachowicz M, Zozulya D, Kotowski J, Jokubauskas P. Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula. Minerals. 2022 Aug 3;12(8):989. doi: 10.3390/min12080989

Author

Macdonald, R. ; Bagiński, B. ; Stachowicz, M. et al. / Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids : Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula. In: Minerals. 2022 ; Vol. 12, No. 8.

Bibtex

@article{b5b3c071f7dd4125a3b8c91acbac8030,
title = "Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids: Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula",
abstract = "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 bastn{\"a}site-(Ce) formed during alteration. The formation of bastn{\"a}site-(Ce) rather than cerussite, which might have been expected in a high Pb-CO2 environment, is ascribed to the fluids being acidic. {\textcopyright} 2022 by the authors.",
keywords = "amorphous Pb-Ti-Fe-Si phase, CO2-bearing hydrothermal fluids, Pb-rich chevkinite-(Ce), White Tundra pegmatite",
author = "R. Macdonald and B. Bagi{\'n}ski and M. Stachowicz and D. Zozulya and J. Kotowski and P. Jokubauskas",
note = "Export Date: 29 September 2022",
year = "2022",
month = aug,
day = "3",
doi = "10.3390/min12080989",
language = "English",
volume = "12",
journal = "Minerals",
issn = "2075-163X",
publisher = "MDPI - Open Access Publishing",
number = "8",

}

RIS

TY - JOUR

T1 - Extreme Alteration of Chevkinite-(Ce) by Pb-CO2-Rich Fluids

T2 - Evidence from the White Tundra Pegmatite, Keivy Massif, Kola Peninsula

AU - Macdonald, R.

AU - Bagiński, B.

AU - Stachowicz, M.

AU - Zozulya, D.

AU - Kotowski, J.

AU - Jokubauskas, P.

N1 - Export Date: 29 September 2022

PY - 2022/8/3

Y1 - 2022/8/3

N2 - 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. © 2022 by the authors.

AB - 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. © 2022 by the authors.

KW - amorphous Pb-Ti-Fe-Si phase

KW - CO2-bearing hydrothermal fluids

KW - Pb-rich chevkinite-(Ce)

KW - White Tundra pegmatite

U2 - 10.3390/min12080989

DO - 10.3390/min12080989

M3 - Journal article

VL - 12

JO - Minerals

JF - Minerals

SN - 2075-163X

IS - 8

M1 - 989

ER -