Computer Science
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1177p&link_type=abstract
In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1177-1178 (SEE N94-20636 05-91
Computer Science
3
Leaching, Meteoritic Composition, Micrometeorites, Spherules, Aggregates, Antarctic Regions, Chondrites, Concentration (Composition), Depletion, Ice, Melting, Vaporizing, Water
Scientific paper
Antarctic micrometeorites (MM's) and Arctic cosmic spherules (CS's) have bulk compositions comparable to those of chondritic meteorites. However, abundance of Na, Ca, Mn, Ni, Co, and S are commonly lower in MM's and CS's as compared to chondrites. Our SEM, EMP, and INAA studies suggest that these elemental depletions in unmelted MM's are likely to be due to leaching of soluble components from the MM's in the upper atmosphere and the melt ice water. Depletions in CS's appear to be mainly due to volatilization during melting in the atmosphere or to sampling bias during aggregate formation or parent rock break-up.
Koeberl Christian
Kurat Gero
Maurette Michel
Palme Herbert
Presper Th.
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