• Publications
  • Influence
Organic compounds in carbonaceous meteorites.
  • M. Sephton
  • Chemistry, Geology
    Natural product reports
  • 23 May 2002
Structural and stable isotopic characteristics suggest that a number of environments may have contributed to the organic inventory, including interstellar space, the solar nebula and the asteroidal meteorite parent body.
Carbon and nitrogen in carbonaceous chondrites: Elemental abundances and stable isotopic compositions
Abstract— We have undertaken a comprehensive study of carbon and nitrogen elemental abundances and isotopic compositions of bulk carbonaceous chondrites. A strategy of multiple analyses has enabled
Catastrophic soil erosion during the end-Permian biotic crisis
Organic geochemical analyses of sedimentary organic matter from a marine Permian-Triassic transition sequence in northeastern Italy reveal a significant influx of land-derived diagenetic products of
Environmental mutagenesis during the end-Permian ecological crisis.
It is document that the microspores of these lycopsids were regularly released in unseparated tetrads indicative of failure to complete the normal process of spore development, providing concrete evidence for chronic environmental mutagenesis at the time of global ecological crisis.
Weathering of Chondritic Meteorites
Meteorites are frequently not the pristine record of early solar system processes that we would like them to be. Many unique meteorites, samples that can further our understanding of the environment
Carbon and nitrogen isotope disturbances and an end-Norian (Late Triassic) extinction event
Major perturbations of organic carbon and nitrogen isotope ratios from a Norian-Rhaetian (Late Triassic) boundary section in British Columbia coincide with an extinction of the dominant, deep-water
Searching for life on Mars: selection of molecular targets for ESA's aurora ExoMars mission.
The European Space Agency's ExoMars mission will seek evidence of organic compounds of biological and non-biological origin at the martian surface, and it is necessary to define and prioritize specific molecular targets for antibody development.