Heating experiments of individual particles from
the Renazzo matrix: SIMS measurements of nitrogen
Stadermann F. J. and Floss C. (2001) Meteoritics &
Planetary Science, 36 (9, Supplement) p. A196-A197.
Deuterium enrichments are common in primitive meteorites
and IDPs, but the carriers of the anomalies are poorly
characterized; these materials also often exhibit 15N
enrichments. Although no direct correlations between
hydrogen and nitrogen isotopic anomalies have been observed,
it is striking that both anomalies tend to be present in the
same primitive materials. Identification of the carriers of
these anomalies would be simplified if it could be shown
that they are the same in both types of extraterrestrial
materials. To this end, we are carrying out heating
experiments on matrix material from Renazzo (CR), which
contains significant enrichments of both deuterium and 15N.
In the future, these experiments will be extended to IDPs
and other primitive meteorites.
Our initial results focused on the deuterium enrichments
observed in Renazzo matrix material, and suggested the loss
of two distinct deuterium carriers: a low temperature
component tentatively identified as acid-resistant organic
phases (lost between 200-400 deg. C) and a higher
temperature component, possibly the waters of hydration in
phyllosilicates (lost between 600-800 deg. C). Here we
report the results of nitrogen isotopic measurements on the
same Renazzo matrix residues that we previously studied.