Oxygen isotopes in deep-sea spherules

Details Oxygen isotopes in deep-sea spherules Oxygen isotopes in deep-sea spherules

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..79..235c&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 79, no. 3-4, Sept. 1986, p. 235-240.

Computer Science

30

Extraterrestrial Radiation, Ocean Bottom, Oxygen Isotopes, Spherules, Atmospheric Chemistry, Metal Particles, Meteoritic Composition, Pacific Ocean, Silicates

Scientific paper

Oxygen isotopic compositions have been measured on several size fractions of deep-sea spherules of extraterrestrial origin. The silicate spherules have an isotopic composition unlike that of any known macrometeorite. Their pre-terrestrial compositions may have been similar to those of C3 chondrites or the anhydrous component of C2 chondrites, the latter being preferred on chemical grounds. Metallic particles oxidize in the upper atmosphere, and sample a region for which no previous oxygen isotope data exist. This part of the atmosphere, above about 100 km, is apparently strongly enriched in the heavy isotopes of oxygen.

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