No V-Fe-Zn isotopic variation in basalts from the 2021 Fagradalsfjall eruption
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No V-Fe-Zn isotopic variation in basalts from the 2021 Fagradalsfjall eruption. / Stow, M.A.; Prytulak, J.; Burton, K.W.; Nowell, G.M.; Marshall, E.W.; Halldórsson, S.A.; Matthews, S.; Rasmussen, M.B.; Ranta, E.; Caracciolo, A.
In: Geochemical Perspectives Letters, Vol. 27, 2023, p. 54-58.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - No V-Fe-Zn isotopic variation in basalts from the 2021 Fagradalsfjall eruption
AU - Stow, M.A.
AU - Prytulak, J.
AU - Burton, K.W.
AU - Nowell, G.M.
AU - Marshall, E.W.
AU - Halldórsson, S.A.
AU - Matthews, S.
AU - Rasmussen, M.B.
AU - Ranta, E.
AU - Caracciolo, A.
N1 - Publisher Copyright: © 2023 European Association of Geochemistry. All rights reserved.
PY - 2023
Y1 - 2023
N2 - The Earth’s mantle is chemically heterogeneous in space and time, which is often reflected by variable isotopic compositions of mantle derived basalts. Basalts from the first 40 days of the 2021 Fagradalsfjall eruption, Reykjanes Peninsula, Iceland, display systematic temporal variations in the ratios of incompatible elements alongside resolvable variations in Sr, Nd and Pb radiogenic isotopes. These variations reflect progressive influx of magma derived from melting of a deeper, more enriched and potentially lithologically distinct source. We use this eruptive time series to conduct the first combined V-Fe-Zn isotope study, exploring the sensitivity of the combined isotopic approach, with particular focus on fingerprinting source lithologicalheterogeneity. We find no analytically resolvable change in V (δ51VAA between −0.95 ± 0.09 % 2 s.d. and −0.86 ± 0.07 % 2 s.d.), Fe (δ56FeIRMM-524 between +0.047 ± 0.042 % 2 s.d. and +0.094 ± 0.049 % 2 s.d.) and Zn (δ66ZnAA-ETH between −0.042 ± 0.003 % 2 s.d. and +0.013 ± 0.027 % 2 s.d.) isotopic compositions. The lack of variability in V-Fe-Zn isotopes, despite the evolving trace element and radiogenic isotope ratios, suggests there is no significant contribution of melts from a lithologically distinct (pyroxenite) mantle component under the Reykjanes Peninsula.
AB - The Earth’s mantle is chemically heterogeneous in space and time, which is often reflected by variable isotopic compositions of mantle derived basalts. Basalts from the first 40 days of the 2021 Fagradalsfjall eruption, Reykjanes Peninsula, Iceland, display systematic temporal variations in the ratios of incompatible elements alongside resolvable variations in Sr, Nd and Pb radiogenic isotopes. These variations reflect progressive influx of magma derived from melting of a deeper, more enriched and potentially lithologically distinct source. We use this eruptive time series to conduct the first combined V-Fe-Zn isotope study, exploring the sensitivity of the combined isotopic approach, with particular focus on fingerprinting source lithologicalheterogeneity. We find no analytically resolvable change in V (δ51VAA between −0.95 ± 0.09 % 2 s.d. and −0.86 ± 0.07 % 2 s.d.), Fe (δ56FeIRMM-524 between +0.047 ± 0.042 % 2 s.d. and +0.094 ± 0.049 % 2 s.d.) and Zn (δ66ZnAA-ETH between −0.042 ± 0.003 % 2 s.d. and +0.013 ± 0.027 % 2 s.d.) isotopic compositions. The lack of variability in V-Fe-Zn isotopes, despite the evolving trace element and radiogenic isotope ratios, suggests there is no significant contribution of melts from a lithologically distinct (pyroxenite) mantle component under the Reykjanes Peninsula.
U2 - 10.7185/geochemlet.2335
DO - 10.7185/geochemlet.2335
M3 - Journal article
AN - SCOPUS:85179352437
VL - 27
SP - 54
EP - 58
JO - Geochemical Perspectives Letters
JF - Geochemical Perspectives Letters
SN - 2410-3403
ER -
ID: 387261923