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Journal Article

Inter‐laboratory Characterisation of Apatite Reference Materials for Oxygen Isotope Analysis and Associated Methodological Considerations

Authors

/persons/resource/agiera

Wudarska, Alicja
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

/persons/resource/michawi

Wiedenbeck, Michael
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Słaby, Ewa
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Lempart‐Drozd, Małgorzata
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Harris, Chris
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Joachimski, Michael M.
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Lécuyer, Christophe
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

MacLeod, Kenneth G.
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Pack, Andreas
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Vennemann, Torsten
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

/persons/resource/couffig

Couffignal, F.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Feng, Dingsu
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

/persons/resource/glodnyj

Glodny, J.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

/persons/resource/kuse

Kusebauch, C.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Mayanna, Sathish
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

/persons/resource/rocholl

Rocholl, A.
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Speir, Laura
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Sun, Yadong
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

Wilke, Franziska D. H.
External Organizations;
GFZ SIMS Publications, Deutsches GeoForschungsZentrum;

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Citation

Wudarska, A., Wiedenbeck, M., Słaby, E., Lempart‐Drozd, M., Harris, C., Joachimski, M. M., Lécuyer, C., MacLeod, K. G., Pack, A., Vennemann, T., Couffignal, F., Feng, D., Glodny, J., Kusebauch, C., Mayanna, S., Rocholl, A., Speir, L., Sun, Y., Wilke, F. D. H. (2022): Inter‐laboratory Characterisation of Apatite Reference Materials for Oxygen Isotope Analysis and Associated Methodological Considerations. - Geostandards and Geoanalytical Research, 46, 2, 277-306.
https://doi.org/10.1111/ggr.12416

Abstract

Here we report on the oxygen isotope compositions of four proposed apatite reference materials (chlorapatite MGMH#133648 and fluorapatite specimens MGMH#128441A, MZ-TH and ES-MM). The samples were initially screened for 18O/16O homogeneity using secondary ion mass spectrometry (SIMS) followed by δ18O determinations in six gas source isotope ratio mass spectrometry laboratories (GS-IRMS) using a variety of analytical protocols for determining either phosphate-bonded or “bulk” oxygen compositions. We also report preliminary δ17O and Δ’17O data, major and trace element compositions collected using EPMA, as well as CO32− and OH− contents in the apatite structure assessed using thermogravimetric analysis and infrared spectroscopy. The repeatability of our SIMS measurements was better than ± 0.25 ‰ (1s) for all four materials that cover a wide range of 103δ18O values between +5.8 and +21.7. The GS-IRMS results show, however, a significant offset of 103δ18O values between the “phosphate” and “bulk” analyses that could not be correlated with chemical characteristics of the studied samples. Therefore, we provide two sets of working values specific to these two classes of analytical methodologies as well as current working values for SIMS data calibration.