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Conference Paper

Six Ca-Mg-Fe Carbonate Reference Materials for In-Situ Analysis of Oxygen and Carbon Isotope Ratios

Authors
/persons/resource/mariro

Scicchitano,  Maria Rosa       
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Harris,  Chris
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Luyt,  Julie
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Pack,  Andreas
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

die Rocco,  Tommaso
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Vennemann,  Torsten
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Wilke,  Franziska
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Schleicher,  Anja Maria
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/glodnyj

Glodny,  J.       
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Tait,  Kimberly T.
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

Philippo,  Simon
External Organizations;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

/persons/resource/michawi

Wiedenbeck,  Michael
3.1 Inorganic and Isotope Geochemistry, 3.0 Geochemistry, Departments, GFZ Publication Database, GFZ Helmholtz Centre for Geosciences;
GFZ SIMS Publications, GFZ Helmholtz Centre for Geosciences;

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Citation

Scicchitano, M. R., Harris, C., Luyt, J., Pack, A., die Rocco, T., Vennemann, T., Wilke, F., Schleicher, A. M., Glodny, J., Tait, K. T., Philippo, S., Wiedenbeck, M. (2025): Six Ca-Mg-Fe Carbonate Reference Materials for In-Situ Analysis of Oxygen and Carbon Isotope Ratios - Book of Abstracts, Geo4Göttingen 2025 (Göttingen, Germany 2025).
https://doi.org/10.48380/b811-j803


Cite as: https://gfzpublic.gfz.de/pubman/item/item_5036874
Abstract


Six Ca-Mg-Fe carbonate reference materials (RMs) were characterized for oxygen and carbon isotope ratios analyses by Secondary Ion Mass Spectrometry (SIMS). This new suite includes four dolomites with Fe# ranging from 0.0004 to 0.3429, one magnesite with Fe# = 0.0099 and one siderite with Fe# = 0.6152. The six samples were split into between 128 to 2048 metrologically identical aliquots, each containing roughly 100 mg of material. We performed a detailed characterization on split materials for their major and minor chemical element composition using EPMA and their mineralogical composition using XRD. The oxygen and carbon isotope reference values were also determined in multiple gas-source isotope ratio mass spectrometry laboratories while the homogeneity of the oxygen and carbon isotope ratios at the sub-nanogram test portion mass were assessed using SIMS. The repeatability of our SIMS measurements varied from ± 0.15 to ± 0.31‰ (1s) for δ18O and from ± 0.29 to ± 0.71‰ (1s) for δ13C. Significant compositional SIMS matrix effects were observed across the dolomite-ankerite and magnesite-siderite solid-solution series in the investigated compositional range. This confirms the need of multiple matrix-matched RMs spanning a wide chemical range in order to get accurate SIMS isotope ratios in minerals that form theses solid-solutions.