Isotopic HG in an Allende carbon-rich residue

Details Isotopic HG in an Allende carbon-rich residue Isotopic HG in an Allende carbon-rich residue

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990metic..25..345r&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 25, Dec. 1990, p. 345, 346. Research supported by NASA.

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Allende Meteorite, Mercury Isotopes, Meteoritic Composition, Abundance, Chromites, Fractionation, Spinel

Scientific paper

A carbon-rich residue from Allende subjected to stepwise heating yielded two isotopically resolvable types of Hg: one with an (Hg-196)/(Hg-202) concentration ratio the same as terrestrial (monitor) Hg; the other enriched in Hg-196 relative to Hg-202 by about 60 percent. Hg with the 202 isotope enriched relative to 196, as is found in bulk Allende, was not observed. Whether the result of mass fractionation or nucleosynthesis, the distinct types of Hg entered different carrier phases and were not thermally mobilized since the accretion of the Allende parent body.

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