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Chemical, mineralogical and isotopic characterization of Ca-Mg-Fe carbonates for SIMS microanalysis

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;

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

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

/persons/resource/fwilke

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;

/persons/resource/aschleic

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;

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Citation

Scicchitano, M. R., Harris, C., Luyt, J., Pack, A., di Rocco, T., Vennemann, T., Wilke, F., Schleicher, A. M., Glodny, J., Tait, K. T., Philippo, S. (2025): Chemical, mineralogical and isotopic characterization of Ca-Mg-Fe carbonates for SIMS microanalysis.
https://doi.org/10.5880/GFZ.DMJQ.2025.005


Cite as: https://gfzpublic.gfz.de/pubman/item/item_5037373
Abstract
Carbonate minerals of the dolomite-ankerite and magnesite-siderite series are often found in sedimentary basins associated with economically viable ore deposits and as alteration product of Ca-Mg-Fe-silicates in igneous and metamorphic rocks. Analysis of oxygen and carbon isotopes in such carbonates gives important information, among others, on their evolution and spatial distribution during sediment burial and diagenesis, crystallization temperature during sedimentation, diagenesis and hydrothermal alteration, fluid and carbon sources, mechanisms of CO2 sequestration (e.g., (Śliwiński et al., 2016, 2018 and references therein). Because of their common chemical zoning at the microscale, in-situ techniques such as Secondary Ion Mass Spectrometry (SIMS) are fundamental to unravel intragrain and intergrain isotopic heterogeneities at scales < 50 µm. Due to instrumental artifacts, SIMS analyses need to be calibrated with matrix-matched reference materials to be accurate. This dataset describes a newly compiled set of Ca-Mg-Fe carbonates that were characterized for their mineralogical (XRD), major and minor element chemical composition (EPMA), oxygen and carbon isotopic composition by acid digestion gas-source isotope ratio mass spectrometry (GS-IRMS), and oxygen and carbon isotopic homogeneity at the microscale (SIMS). Three dolomites and one ankerite with Fe# (molar Fe/(Fe+Mg)) ranging from 0.0004 to 0.3429, one magnesite (Fe# = 0.0099) and one siderite (Fe# = 0.6152) are now available for the global SIMS community.