Oxygen isotopes in refractory stratospheric dust particles - Proof of extraterrestial origin

Details Oxygen isotopes in refractory stratospheric dust particles - Proof of extraterrestial origin Oxygen isotopes in refractory stratospheric dust particles - Proof of extraterrestial origin

Sep 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987sci...237.1468m&link_type=abstract

Science (ISSN 0036-8075), vol. 237, Sept. 18, 1987, p. 1468-1471.

Computer Science

50

Extraterrestrial Life, Interplanetary Dust, Mineralogy, Oxygen Isotopes, Refractory Materials, Abundance, Magnesium Isotopes, Mass Spectroscopy, Spinel, Stratosphere, Interplanetary Dust, Oxygen, Isotopes, Refractory Material, Particles, Samples, Extraterrestrial, Stratosphere, Origin, Source, Magnesium, Spectrometry, Laboratory Studies, Comparisons, Abundance, Meteorites, Carbonaceous Material, Photomicrographs, Carbonaceous Chondrites, Stony Meteorites, Meteorite, Ion Probe Methods, Procedure

Scientific paper

The oxygen and magnesium isotopic compositions of five individual particles that were collected from the stratosphere and that bear refractory minerals were measured by secondary ion mass spectrometry. Four of the particles exhibit excesses of oxygen-16 similar to those observed in anhydrous mineral phases of carbonaceous chondrites and thus are extraterrestrial. The oxygen and magnesium isotopic abundances of one corundum-rich particle are consistent with a terrestial origin. Magnesium in the four extraterrestrial particles is isotopically normal. It is unlikely that these particles are derived from carbonaceous chondrites and thus such particles probably represent a new type of collected extraterrestrial material.

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