Apollo Drill Core Depth Relationships

Details Apollo Drill Core Depth Relationships Apollo Drill Core Depth Relationships

Jun 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974moon...10..183c&link_type=abstract

The Moon, Volume 10, Issue 2, pp.183-194

Physics

2

Scientific paper

Preliminary depth relationships are presented for the Apollo 15, 16 and 17 drill core samples. For a given depth in any of these drill stems, thein situ lunar surface depth can be estimated. Ranges of uncertainty are also established, based on percent core recovery and degree of sample disturbance. The most likely explanation for the sample disturbance observed in the top three sections of the Apollo 16 drill stem is sample migration after the stem was capped on the lunar surface; essentially no sample was lost. Similar disturbance occurred in the Apollo 17 drill core, although to a lesser degree. The average original bulk densities (i.e., before any disturbance occurred) of the Apollo 15, 16 and 17 drill cores are 1.76, 1.59, and 1.87 g cm-3, respectively. The Apollo 15 and 17 values are probably close to thein situ values; but the Apollo 16 averagein situ density could be as much as 13% less than the already low density in the drill core.

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