Figure 1

ESEM spot analyses of potential catalyst sites on the olivine surfaces used in the incubation experiments. Relative proportions of elements in weight percent is presented in each picture. The high carbon content in picture B and D is due to carbon coating of the sample. A) SEM image of a chrome-spinel crystal taken using optical microscopy, B) SEM image of a Cr and Fe-rich phase C) SEM image of a Fe-rich phase and D) SEM image of Fe, Ni and Cu-rich phases.