NanoSIMS C, O, and N isotopic mapping of polished grain OREX-803165-0 to characterize presolar grains and organic matter
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The NanoSIMS 50L at NASA JSC was used to analyze concurrently the isotopes 12C, 13C, 16O, 17O, 18O, 12C14N, and 12C15N in sample OREX-803165-0 through raster ion imaging. On the sample, seven isotope maps were collected for 20 micrometer fields of view. These 20-micron regions were analyzed sequentially during chained analyses. The data were collected with the goal of identifying isotopically anomalous organic matter and presolar grains. San Carlos Olivine was measured as an O isotopic standard, kerogen (KG17) was measured as a C and N isotopic standard for organic matter, and graphite was measured as a C isotopic standard for presolar SiC and graphite grains.
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Nguyen, A., 2025. NanoSIMS C, O, and N isotopic mapping of polished grain OREX-803165-0 to characterize presolar grains and organic matter, Version 1.0. Astromaterials Data Archive. https://doi.org/10.60707/5e1y-6h69 Accessed 2025-12-05.
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This material is supported by NASA under contract NNM10AA11C issued through the New Frontiers program.
