Surface history of some Apollo 17 lunar soils

Details Surface history of some Apollo 17 lunar soils Surface history of some Apollo 17 lunar soils

Oct 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974gecoa..38.1615f&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 38, Oct. 1974, p. 1615-1623.

Computer Science

Apollo 17 Flight, Cosmic Rays, Lunar Soil, Lunar Surface, Particle Tracks, Geochronology, Heat Flux, Lunar Craters, Lunar Evolution, Neutron Flux Density, Stratigraphy

Scientific paper

Cosmic ray track densities in Apollo 17 soil samples are used to infer surface exposure times of soils from a trench at Van Serg Crater, from on and near a boulder at Camelot Crater, and from the position of the heat flow and neutron flux experiments (the ALSEP site). The topmost 2 cm of soil at Van Serg was exposed for 11 m.y., the top cm at Camelot for 36 m.y. A layering chronology and average deposition rate are proposed for the trench. For all soils the median track densities imply predispositional irradiation in the top 15 cm of the lunar surface for times that were long compared with the actual residence in the stratigraphic positions from which the soils were collected. Van Serg crater is inferred to have been formed approximately 24 m.y. ago.

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