Computer Science
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996ucsd.rept.....t&link_type=abstract
Technical Report, California Univ., San Diego La Jolla, CA United States Dept. of Chemistry and Biochemistry
Computer Science
Meteoritic Composition, Sulfur Isotopes, Achondrites, Chondrites, Iron Meteorites, Ureilites, Oxygen Isotopes, Protons, Metal Foils, Minerals, Oxygen
Scientific paper
Funds were requested to continue our program in meteoritic sulfur isotopic analysis. We have recently detected a potential nucleosynthetic sulfur isotopic anomaly. We will search for potential carriers. The documentation of bulk systematics and the possible relation to nebular chemistry and oxygen isotopes will be explored. Analytical techniques for delta33, delta34S, delta36S isotopic analysis were improved. Analysis ofmilligram samples is now possible. A possible relation between sulfur isotopes and oxygen was detected, with similar group systematics noted, particularly in the case of aubrites, ureilites and entstatite chondrites. A possible nucleosynthetic excess S-33 has been noted in bulk ureilites and an oldhamite separate from Norton County. High energy proton (approximately 1 GeV) bombardments of iron foils were done to experimentally determine S-33, S-36 spallogenic yields for quantitation of isotopic measurements in iron meteorites. Techniques for measurement of mineral separates were perfected and an analysis program initiated. The systematic behavior of bulk sulfur isotopes will continue to be explored.
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