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. 2017 Mar 1;3(3):e1601749. doi: 10.1126/sciadv.1601749

Fig. 3. Dark-field TEM images and elemental maps of C, S, and Fe and NanoSIMS ion intensity maps of CN−, S−, FeO−, and FeS− of an individual Fe-bearing particle.

Fig. 3

(A and B) Elemental maps showing two individual sulfate particles with Fe-rich particles (as hotspots). (C) Ion intensity maps showing the presence of OM, sulfate, Fe oxide, and Fe sulfate.