Chemistry and thermal history of metal particles in Luna 20 soils

Details Chemistry and thermal history of metal particles in Luna 20 soils Chemistry and thermal history of metal particles in Luna 20 soils

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..847g&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 4, pp.847-848

Physics

1

Scientific paper

Individual metal particles from Luna 20 thin sections 521, 513 and 514 as well as several small metallic inclusions in silicate particles from Luna 20 thin sections 501 and 502 were examined using optical microscopy and the electron microprobe. All the metallic particles and inclusions analyzed are of meteoritic Co-Ni content as are most of the metallic particles from the Fra Mauro and the Apollo 16 highlands sites. It is proposed that most of the metal at these 3 sites had its origin in the meteoritic projectiles that bombarded and accumulated in the early lunar crust. It is apparent that the metallic particles and some of the metallic inclusions in the Luna 20 soil have been subjected to reheating on the Moon and this process has removed any evidence of the original meteoritic microstructure of the metal.

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