Primordial heavy noble gases in the pristine Paris carbonaceous chondrite.

ABSTRACT: The Paris carbonaceous chondrite represents the most pristine carbonaceous chondrite, providing a unique opportunity to investigate the composition of early solar system materials prior to the onset of significant aqueous alteration. A dual origin (namely from the inner and outer solar system) has been demonstrated for water in the Paris meteorite parent body (Piani et al. 2018). Here, we aim to evaluate the contribution of outer solar system (cometary-like) water ice to the inner solar system water ice using Xe isotopes. We report Ar, Kr, and high-precision Xe isotopic measurements within bulk CM 2.9 and CM 2.7 fragments, as well as Ne, Ar, Kr, and Xe isotope compositions of the insoluble organic matter (IOM). Noble gas signatures are similar to chondritic phase Q with no evidence for a c

SUBMITTER: Bekaert DV 

PROVIDER: S-EPMC6378587 | biostudies-literature | 2019 Feb

REPOSITORIES: biostudies-literature