An interstellar isotopic signature recorded in altered pyroxene chondrules

Details An interstellar isotopic signature recorded in altered pyroxene chondrules An interstellar isotopic signature recorded in altered pyroxene chondrules

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..291d&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 291.

Computer Science

6

Interstellar Matter, Hydrogen Isotopes, Chondrule, Pyroxenes, Meteoritic Composition, Chondrites, Signature Analysis, Ion Probes, Water, Olivine

Scientific paper

A high abundance of hydroxide in the pyroxenes of meteoritic chondrules from the LL3 chondrites Bishunpur and Semarkona has been identified due to submicroscopic amphibole lamellae. Ion-microprobe analyses of these water-rich areas have shown that they have retained interstellar hydrogen isotopic ratios with D/H up to 479 x 10 exp -6. Mesostases and olivines in these chondrules have been subjected to an intense alteration with a separate source of water having a D/H ratio (down to 63 x 10 exp -6) close to the protosolar value (D/H = 31 +/- 4 x 10 exp -6 in protosolar H2).

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