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Radiation history of lunar microbreccias and lithic chrondrules from Weston meteorite by track data

Journal Article · · J. Geophys. Res.; (United States)
; ; ; ;
Tracks generated in the lithic chondrules of the brecciated Weston meteorite as well as in the lunar microbreccias by iron group nuclei of solar cosmic rays are studied. The results for about 2000 olivine and pyroxene grains contained in 67 lithic chondrules indicate that a relict irradiation of the material occurred at an early stage in solar system formation, i.e., before these chondrules were assembled. The results for about 1000 olivine and pyroxene grains in 13 microbreccias strengthen our earlier conclusion that part of the chondrules from the Weston meteorite may have formed in processes analogous to brecciation. The newly obtained data confirm that the formation processes of the Weston lithic chondrules, containing solar flare irradiated crystals, were similar to the impact formation of microbreccias on the lunar regolith without heating compacted material up to temperatures of 600/sup 0/-700 /sup 0/C.
Research Organization:
Vernadsky Institute of Geochemistry and Analytical Chemistry, USSR Academy of Sciences, Moscow, USSR
OSTI ID:
5939780
Journal Information:
J. Geophys. Res.; (United States), Journal Name: J. Geophys. Res.; (United States) Vol. 88:S1; ISSN JGREA
Country of Publication:
United States
Language:
English

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Related Subjects

640107* -- Astrophysics & Cosmology-- Planetary Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALKALINE EARTH METAL COMPOUNDS
IRON COMPOUNDS
IRON SILICATES
LUNAR MATERIALS
MAGNESIUM COMPOUNDS
MAGNESIUM SILICATES
MATERIALS
METEORITES
MINERALS
OLIVINE
OXYGEN COMPOUNDS
PARTICLE TRACKS
PYROXENES
RADIATION EFFECTS
RADIATIONS
SILICATE MINERALS
SILICATES
SILICON COMPOUNDS
SOLAR PARTICLES
SOLAR RADIATION
STELLAR RADIATION
TRANSITION ELEMENT COMPOUNDS