Figure 7
From: Distributions of CHN compounds in meteorites record organic syntheses in the early solar system
NanoSIMS analysis of the FIB section collected from an area of concentrated C–H–N compounds in the NWA 801 sample. (a,b) Sampling area on the distribution of CnH2n-1N2 compound. (c) SEM image of FIB section from the area shown in (a). (d) δ13C map of the FIB section. (e) δ15N map of the FIB section. The circled region has δ15N = +292 ± 43‰. (f) 12C14N image of the FIB section. (g) NanoSIMS secondary electron image of the FIB section. The organic-rich regions have been selected using distributions of 12C ions in the FIB section applying a 10% threshold of the total 12C ion counts. Organic-rich regions, therefore, were distinguished with a spatial resolution of ~100 nm.
