Other
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.293..124g&link_type=abstract
Nature, vol. 293, Sept. 10, 1981, p. 124, 125.
Other
4
Chondrites, Irradiation, Particle Tracks, Solar Cosmic Rays, Solar Flares, Electron Microscopy, Rare Gases, Solar Wind, Spectrum Analysis, Meteorites, Antarctic Meteorites, Irradiation, Solar Flares, Analysis, Petrography, L3 Chondrites, H3 Chondrites, Classification, Density, Photographs, Cosmic Rays, Exposure Ages, Rare Gases, Nuclear Tracks, Samples, Meteorite, Allan Hills Meteorites, Alha77003, Grains, Data, Alha77015, Alha77216, Alha77230, Alha77260, Alha77304, Alha77262, Ll Chondrites, L4 Chondrites
Scientific paper
The observation of tracks from solar flare heavy nuclei in Antarctic meteorite samples is reported. In an analysis of nuclear track densities in eight L and H chondrites of low metamorphic grade, it was found that two interior specimens of sample 77216, an L-3 chondrite, contain olivine grains with track densities much higher than the average track densities, indicating precompaction irradiation by solar flares in different shielding conditions. Preliminary data from mass spectroscopic analyses show a large excess of noble gases, with a Ne-20/Ne-22 ratio of greater than or equal to 10, indicating the presence of solar-type noble gas. Results of track density measurements in the other Antarctic meteorites range from 10,000 to 4,000,000/sq cm, which is within the range observed in non-Antarctic L-group meteorites
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