Ancient carbon and noble gas fractionationNoble gases in ancient terrestrial kerogen and meteoritic carbonaceous residues are compared in terms of their elemental fractionation with respect to atmospheric and the cosmic reservoirs, respectively. Fractionation factors for the heavy noble gases are almost identical in both types of samples. Therefore, some features of the interaction between carbon phases and noble gases in very different environments of origin appear to be similar. These findings underscore the plausibility of the meteoritic carbonaceous residues as a noble gas carrier and as a novel vehicle for achieving the elemental fractionation required to derive the planetary noble gas pattern from cosmic abundances.
Document ID
19780057659
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Frick, U. (California, University Berkeley, Calif., United States)
Chang, S. (NASA Ames Research Center Moffett Field, Calif., United States)