New insights into Mo and Ru isotope variation in the nebula and terrestrial planet accretionary genetics.

ABSTRACT: When corrected for the effects of cosmic ray exposure, Mo and Ru nucleosynthetic isotope anomalies in iron meteorites from at least nine different parent bodies are strongly correlated in a manner consistent with variable depletion in s-process nucleosynthetic components. In contrast to prior studies, the new results show no significant deviations from a single correlation trend. In the refined Mo-Ru cosmic correlation, a distinction between the non-carbonaceous (NC) group and carbonaceous chondrite (CC) group is evident. Members of the NC group are characterized by isotope compositions reflective of variable s-process depletion. Members of the CC group analyzed here plot in a tight cluster and have the most s-process depleted Mo and Ru isotopic compositions, with Mo i

SUBMITTER: Bermingham KR 

PROVIDER: S-EPMC6417891 | biostudies-literature | 2018 Apr

REPOSITORIES: biostudies-literature