The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires,
SW-Iceland: Insights from trace element compositions of olivine

J 2023

The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires, SW-Iceland: Insights from trace element compositions of olivine

KRMÍČEK, Lukáš, Valentin R. TROLL, Thor THORDARSON, Marek BRABEC, William M. MORELAND et. al.

Základní údaje

Originální název

The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires, SW-Iceland: Insights from trace element compositions of olivine

Autoři

KRMÍČEK, Lukáš (203 Česká republika, garant), Valentin R. TROLL, Thor THORDARSON, Marek BRABEC, William M. MORELAND a Adam MAŤO (703 Slovensko, domácí)

Vydání

Czech Polar Reports, Masaryk University, 2023, 1805-0689

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10500 1.5. Earth and related environmental sciences

Stát vydavatele

Česká republika

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 1.000 v roce 2022

Kód RIV

RIV/00216224:14310/23:00133917

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.5817/CPR2023-2-20

UT WoS

001187386900001

Klíčová slova anglicky

olivine; Reykjanes Peninsula; Litli-Hrútur lava; peridotitic mantle; LA-ICP-MS

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 2. 4. 2024 16:19, Mgr. Marie Šípková, DiS.

Anotace

V originále

This study provides data on the trace element composition of olivine from olivine tholeiitic basalts sampled during the July–August 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires in the Reykjanes Volcanic Belt. Chemistry of the Litli-Hrútur olivine is characteristic for volcanic olivine crystals that represent products of magmatic crystallisation. The investigated olivine megacrysts show forsterite (Fo) content in the range of 81 (rims) to 85 (cores) mole percent [defined as Fo = Mg/(Mg + Fe)]. Olivine Ni concentrations (1540–1840 ppm) correlate positively with the Fo contents. In addition, Ca contents show a range from 1890 to 2460 ppm at relatively low Ti concentrations. Olivine from the Litli-Hrútur samples shows an equilibrium with peridotitic mantle melts, yet the data show that the 2023 Litli-Hrútur and the 2022 Meradalir olivine populations crystallised from compositionally more evolved magma batches than olivine crystals from the 2021 Geldingadalir eruption of the Fagradalsfjall Fires. These results imply that magmatic differentiation has taken place between the initial 2021 events and the subsequent 2022 and 2023 eruptions as a result of crystal–liquid fractionation, shifting the overall magma chemistry towards more evolved compositions with time. This implies that fractional crystallisation in sub-alkaline magma reservoirs operates on the scale of years, which is a fundamental advance in our understanding of these common magmatic systems.

Citovat

KRMÍČEK, Lukáš, Valentin R. TROLL, Thor THORDARSON, Marek BRABEC, William M. MORELAND a Adam MAŤO. The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires, SW-Iceland: Insights from trace element compositions of olivine. Czech Polar Reports. Masaryk University, 2023, roč. 13, č. 2, s. 257-270. ISSN 1805-0689. Dostupné z: https://dx.doi.org/10.5817/CPR2023-2-20.

@article{2390779,
   author = {Krmíček, Lukáš and Troll, Valentin R. and Thordarson, Thor and Brabec, Marek and Moreland, William M. and Maťo, Adam},
   article_number = {2},
   doi = {http://dx.doi.org/10.5817/CPR2023-2-20},
   keywords = {olivine; Reykjanes Peninsula; Litli-Hrútur lava; peridotitic mantle; LA-ICP-MS},
   language = {eng},
   issn = {1805-0689},
   journal = {Czech Polar Reports},
   title = {The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires, SW-Iceland: Insights from trace element compositions of olivine},
   url = {https://journals.muni.cz/CPR/article/view/38145},
   volume = {13},
   year = {2023}
}

TY  - JOUR
ID  - 2390779
AU  - Krmíček, Lukáš - Troll, Valentin R. - Thordarson, Thor - Brabec, Marek - Moreland, William M. - Maťo, Adam
PY  - 2023
TI  - The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires, SW-Iceland: Insights from trace element compositions of olivine
JF  - Czech Polar Reports
VL  - 13
IS  - 2
SP  - 257-270
EP  - 257-270
PB  - Masaryk University
SN  - 18050689
KW  - olivine
KW  - Reykjanes Peninsula
KW  - Litli-Hrútur lava
KW  - peridotitic mantle
KW  - LA-ICP-MS
UR  - https://journals.muni.cz/CPR/article/view/38145
N2  - This study provides data on the trace element composition of olivine from olivine tholeiitic basalts sampled during the July–August 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires in the Reykjanes Volcanic Belt. Chemistry of the Litli-Hrútur olivine is characteristic for volcanic olivine crystals that represent products of magmatic crystallisation. The investigated olivine megacrysts show forsterite (Fo) content in the range of 81 (rims) to 85 (cores) mole percent [defined as Fo = Mg/(Mg + Fe)]. Olivine Ni concentrations (1540–1840 ppm) correlate positively with the Fo contents. In addition, Ca contents show a range from 1890 to 2460 ppm at relatively low Ti concentrations. Olivine from the Litli-Hrútur samples shows an equilibrium with peridotitic mantle melts, yet the data show that the 2023 Litli-Hrútur and the 2022 Meradalir olivine populations crystallised from compositionally more evolved magma batches than olivine crystals from the 2021 Geldingadalir eruption of the Fagradalsfjall Fires. These results imply that magmatic differentiation has taken place between the initial 2021 events and the subsequent 2022 and 2023 eruptions as a result of crystal–liquid fractionation, shifting the overall magma chemistry towards more evolved compositions with time. This implies that fractional crystallisation in sub-alkaline magma reservoirs operates on the scale of years, which is a fundamental advance in our understanding of these common magmatic systems.
ER  -

KRMÍČEK, Lukáš, Valentin R. TROLL, Thor THORDARSON, Marek BRABEC, William M. MORELAND a Adam MAŤO. The 2023 Litli-Hrútur eruption of the Fagradalsfjall Fires, SW-Iceland: Insights from trace element compositions of olivine. \textit{Czech Polar Reports}. Masaryk University, 2023, roč.~13, č.~2, s.~257-270. ISSN~1805-0689. Dostupné z: https://dx.doi.org/10.5817/CPR2023-2-20.

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