Insoluble Organic Matter in Carbonaceous Chondrites and Archean Cherts

Details Insoluble Organic Matter in Carbonaceous Chondrites and Archean Cherts Insoluble Organic Matter in Carbonaceous Chondrites and Archean Cherts

Jul 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..305..333b&link_type=abstract

Astrobiology: Future Perspectives, p. 333 by Ehrenfreund et al., Leiden Observatory, The Netherlands ASTROPHYSICS AND SPACE SCIE

Astronomy and Astrophysics

Astrophysics

Scientific paper

The macromolecular carbonaceous material contained in the meteorites of Orgueil, Murchison and Tagish Lake, and in an early Archean chert from the Warrawoona Group (Australia) was analyzed by Electron Paramagnetic Resonance. The meteoritic macromolecular material distinguishes itself from its terrestrial counterpart by the presence of diradicaloids (alkyl poly-substituted aromatic moieties bearing two unpaired electrons), which appear as an extraterrestrial signature. Electron Paramagnetic Resonance (EPR) provided information about the oxygen content and the maximum size of the aromatic moieties of the macromolecular material in the Warrawoona chert. Comparison with biogenic macromolecular organic matter showed that the EPR linewidth could be an easily measurable indicator of the sample age.

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