The spatial distribution of D-enrichments in Renazzo matrix

Details The spatial distribution of D-enrichments in Renazzo matrix The spatial distribution of D-enrichments in Renazzo matrix

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..489g&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 489.

Computer Science

5

Meteoritic Composition, Deuterium, Isotopic Enrichment, Spatial Distribution, Interplanetary Dust, Quartz, Scanning Electron Microscopy, Ion Probes

Scientific paper

It has been well established that highly D-enriched materials occur in some primitive meteorites (Yang and Epstein, 1983) and interplanetary dust particles (Messenger et al., 1996). However, the D-rich carriers are still incompletely characterized. As part of an ongoing effort by the authors to investigate the anomalous components, both in primitive meteorites and interplanetary dust particles, an examination was made of the spatial distribution of the D-enrichments in Renazzo (CR) matrix. Black matrix material from bulk Renazzo was crushed in quartz plates, and fragments of about 10 to 50 mm in size were mounted onto sputter-cleaned gold foils for further analysis by optical microscopy, SEM-EDX spectrometry, a modified IMS-3F Cameca ion microprobe, and ion imaging. The study showed that the dark fragments in the Renazzo matrix are obviously D-enriched, with typical delta-D values between +600 to +1200 percent. An exceptional C-rich grain had the highest D excess with delta D = +5200 percent, which was the highest delta-D value ever observed in CR meteorites.

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