Metamictization and fluid-driven alteration triggering massive
HFSE and REE mobilization from zircon and titanite: direct
evidence from EMPA imaging and LA-ICP-MS analyses

J 2021

Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: direct evidence from EMPA imaging and LA-ICP-MS analyses

KUBEŠ, Martin, Jaromír LEICHMANN, Vojtěch WERTICH, Juraj MOZOLA, Markéta HOLÁ et. al.

Základní údaje

Originální název

Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: direct evidence from EMPA imaging and LA-ICP-MS analyses

Autoři

KUBEŠ, Martin (203 Česká republika, garant, domácí), Jaromír LEICHMANN (203 Česká republika, domácí), Vojtěch WERTICH (203 Česká republika, domácí), Juraj MOZOLA (703 Slovensko, domácí), Markéta HOLÁ (203 Česká republika, domácí), Viktor KANICKÝ (203 Česká republika, domácí) a Radek ŠKODA (203 Česká republika, domácí)

Vydání

Chemical Geology, Amsterdam, Elsevier, 2021, 0009-2541

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10505 Geology

Stát vydavatele

Nizozemské království

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 4.685

Kód RIV

RIV/00216224:14310/21:00122705

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1016/j.chemgeo.2021.120593

UT WoS

000720228300012

Klíčová slova anglicky

HFSE mobility; REE leaching; Fluid-driven alteration; Zircon; Titanite; Apatite

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 22. 2. 2023 14:25, Mgr. Marie Šípková, DiS.

Anotace

V originále

The major and trace element composition of the main HFSE-bearing phases from highly evolved miaskitic syenites has been investigated to assess their stability, an important control on HFSE retention and mobility during post-magmatic hydrothermal activity. The major HFSE carrier, abundant zircon (up to 5 vol%), has undergone intensive metamictization, caused by high initial U and Th along with the presence of early magmatic U-thorite inclusions. Subsequent to metamictization, zircon experienced pervasive fluid-driven alteration, as evidenced by strong depletion in Zr and Si, enrichment in non-formula elements (Ca, Fe, Al, P), deficient EMPA analytical totals, high porosity, and low BSE-intensities of strongly altered crystal interiors. Element maps suggest that extensive HFSE remobilization from altered zircon was controlled by interaction with oxidized aqueous solutions circulating through abundant microfractures that formed by volume expansion due to zircon metamictization. Enhanced HFSE mobility in hydrothermal fluids is reflected by the presence of a hydrated amorphous Zr-Th-U-Si-phase, filling microveinlets intimately associated with metamict zircons. In addition to HFSE remobilization from altered zircon, titanite released a significant amount of REE during interaction with the hydrothermal fluids that concurrently caused a fractionation of Eu in titanite, producing increased EuN/EuN* (4.16–22.2) in altered crystals. Extensively altered titanite grains with elevated EuN/EuN* are considerably depleted in ∑REE+Y compared to unaffected crystals, showing that degree of positive Eu anomalies, relating to post-magmatic metasomatic overprint, appears to be a sensitive indicator for an intensity of hydrothermal alteration and even the total amount of released incompatible elements. Pronounced LREE enrichment accompanied by HREE depletion in the strongly altered crystals indicates greater LREE retention in titanite and higher HREE mobility in the hydrothermal system probably caused by complexing with fluoride ligands. Fluorine was most likely supplied through amphibole and biotite chloritization, as suggested by notably low F in the mafic silicates along with the formation of secondary F-rich titanite at the expense of altered biotite. Moreover, the dissolution of zircon and titanite and resistance of apatite to pervasive alteration indicates that remobilization of HFSE and REE from these phases occurred under alkaline conditions (pH 8–12), presumably controlled by potassium-dominated complexes transporting HFSE along with REE over long distances, as indicated by a close spatial linkage of syenite outcrops with U-mineralization. Our results clearly demonstrate: (1) extensive chemical dissolution of zircon controlled by its self-induced radiation damage; (2) high solubility of titanite and metamict zircon under alkaline conditions; (3) enhanced mobility and long-distance transport of HFSE and REE in alkali- and F-rich hydrothermal systems.

Návaznosti

EF16_026/0008459, projekt VaV

Název: Dlouhodobý výzkum geochemických bariér pro ukládání jaderného odpadu

Citovat

KUBEŠ, Martin, Jaromír LEICHMANN, Vojtěch WERTICH, Juraj MOZOLA, Markéta HOLÁ, Viktor KANICKÝ a Radek ŠKODA. Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: direct evidence from EMPA imaging and LA-ICP-MS analyses. Chemical Geology. Amsterdam: Elsevier, 2021, roč. 586, December, s. 120593-120612. ISSN 0009-2541. Dostupné z: https://dx.doi.org/10.1016/j.chemgeo.2021.120593.

@article{1800724,
   author = {Kubeš, Martin and Leichmann, Jaromír and Wertich, Vojtěch and Mozola, Juraj and Holá, Markéta and Kanický, Viktor and Škoda, Radek},
   article_location = {Amsterdam},
   article_number = {December},
   doi = {http://dx.doi.org/10.1016/j.chemgeo.2021.120593},
   keywords = {HFSE mobility; REE leaching; Fluid-driven alteration; Zircon; Titanite; Apatite},
   language = {eng},
   issn = {0009-2541},
   journal = {Chemical Geology},
   title = {Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: direct evidence from EMPA imaging and LA-ICP-MS analyses},
   url = {https://www.sciencedirect.com/science/article/pii/S0009254121005362},
   volume = {586},
   year = {2021}
}

TY  - JOUR
ID  - 1800724
AU  - Kubeš, Martin - Leichmann, Jaromír - Wertich, Vojtěch - Mozola, Juraj - Holá, Markéta - Kanický, Viktor - Škoda, Radek
PY  - 2021
TI  - Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: direct evidence from EMPA imaging and LA-ICP-MS analyses
JF  - Chemical Geology
VL  - 586
IS  - December
SP  - 120593
EP  - 120593
PB  - Elsevier
SN  - 00092541
KW  - HFSE mobility
KW  - REE leaching
KW  - Fluid-driven alteration
KW  - Zircon
KW  - Titanite
KW  - Apatite
UR  - https://www.sciencedirect.com/science/article/pii/S0009254121005362
N2  - The major and trace element composition of the main HFSE-bearing phases from highly evolved miaskitic syenites has been investigated to assess their stability, an important control on HFSE retention and mobility during post-magmatic hydrothermal activity. The major HFSE carrier, abundant zircon (up to 5 vol%), has undergone intensive metamictization, caused by high initial U and Th along with the presence of early magmatic U-thorite inclusions. Subsequent to metamictization, zircon experienced pervasive fluid-driven alteration, as evidenced by strong depletion in Zr and Si, enrichment in non-formula elements (Ca, Fe, Al, P), deficient EMPA analytical totals, high porosity, and low BSE-intensities of strongly altered crystal interiors. Element maps suggest that extensive HFSE remobilization from altered zircon was controlled by interaction with oxidized aqueous solutions circulating through abundant microfractures that formed by volume expansion due to zircon metamictization. Enhanced HFSE mobility in hydrothermal fluids is reflected by the presence of a hydrated amorphous Zr-Th-U-Si-phase, filling microveinlets intimately associated with metamict zircons. In addition to HFSE remobilization from altered zircon, titanite released a significant amount of REE during interaction with the hydrothermal fluids that concurrently caused a fractionation of Eu in titanite, producing increased EuN/EuN* (4.16–22.2) in altered crystals. Extensively altered titanite grains with elevated EuN/EuN* are considerably depleted in ∑REE+Y compared to unaffected crystals, showing that degree of positive Eu anomalies, relating to post-magmatic metasomatic overprint, appears to be a sensitive indicator for an intensity of hydrothermal alteration and even the total amount of released incompatible elements. Pronounced LREE enrichment accompanied by HREE depletion in the strongly altered crystals indicates greater LREE retention in titanite and higher HREE mobility in the hydrothermal system probably caused by complexing with fluoride ligands. Fluorine was most likely supplied through amphibole and biotite chloritization, as suggested by notably low F in the mafic silicates along with the formation of secondary F-rich titanite at the expense of altered biotite. Moreover, the dissolution of zircon and titanite and resistance of apatite to pervasive alteration indicates that remobilization of HFSE and REE from these phases occurred under alkaline conditions (pH 8–12), presumably controlled by potassium-dominated complexes transporting HFSE along with REE over long distances, as indicated by a close spatial linkage of syenite outcrops with U-mineralization. Our results clearly demonstrate: (1) extensive chemical dissolution of zircon controlled by its self-induced radiation damage; (2) high solubility of titanite and metamict zircon under alkaline conditions; (3) enhanced mobility and long-distance transport of HFSE and REE in alkali- and F-rich hydrothermal systems.
ER  -

KUBEŠ, Martin, Jaromír LEICHMANN, Vojtěch WERTICH, Juraj MOZOLA, Markéta HOLÁ, Viktor KANICKÝ a Radek ŠKODA. Metamictization and fluid-driven alteration triggering massive HFSE and REE mobilization from zircon and titanite: direct evidence from EMPA imaging and LA-ICP-MS analyses. \textit{Chemical Geology}. Amsterdam: Elsevier, 2021, roč.~586, December, s.~120593-120612. ISSN~0009-2541. Dostupné z: https://dx.doi.org/10.1016/j.chemgeo.2021.120593.

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