Carbon Compounds in Interplanetary Dust: Evidence for Formation by Heterogeneous Catalysis

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Science  06 Jan 1984:
Vol. 223, Issue 4631, pp. 56-58
DOI: 10.1126/science.223.4631.56


Associations of carbonaceous material with iron-nickel alloy, carbides, and oxides were identified by analytical electron microscopy in ten unmelted chondritic porous micrometeorites from the earth's stratosphere. These associations, which may be interpreted in terms of reactions between a carbon-containing gas and catalytically active dust grains, suggest that some of the carbon in the chondritic porous subset of interplanetary dust was emplaced through heterogeneous catalysis.