Eu speciation in apatite at 1 bar: An experimental study of valence-state partitioning by XANES, lattice strain, and Eu/Eu* in basaltic systems

Title
Eu speciation in apatite at 1 bar: An experimental study of valence-state partitioning by XANES, lattice strain, and Eu/Eu* in basaltic systems
Publication Date
2023-05-01
Author(s)
Tailby, Nicholas D
( author )
OrcID: https://orcid.org/0000-0002-2305-3338
Email: ntailby@une.edu.au
UNE Id une-id:ntailby
Trail, Dustin
Watson, Bruce
Lanzirotti, Antonio
Newville, Matthew
Wang, Yanling
Type of document
Journal Article
Language
en
Entity Type
Publication
Publisher
Mineralogical Society of America
Place of publication
Germany
DOI
10.2138/am-2022-8388
UNE publication id
une:1959.11/63109
Abstract

Partition coefficients for rare earth elements (REEs) between apatite and basaltic melt were determined as a function of oxygen fugacity (fO2; iron-wüstite to hematite-magnetite buffers) at 1 bar and between 1110 and 1175 °C. Apatite-melt partitioning data for REE3+ (La, Sm, Gd, Lu) show near constant values at all experimental conditions, while bulk Eu becomes more incompatible (with an increasing negative anomaly) with decreasing fO2. Experiments define three apatite calibrations that can theoretically be used as redox sensors.

Link
link
Citation
The American Mineralogist, 108(5), p. 789-813
ISSN
1945-3027
0003-004X
Start page
789
End page
813

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