Oxygen and bulk element abundances in Luna 20 fines

Details Oxygen and bulk element abundances in Luna 20 fines Oxygen and bulk element abundances in Luna 20 fines

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..905j&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 4, pp.905-908

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Scientific paper

Abundances of O, Si, Al and Mn have been determined in Luna 20 fines sample 22001,9 by instrumental neutron activation analysis. The abundances of O, Si and Al are among the highest we have observed in lunar samples and reflect a highlands origin for much of this regolith sample. The Luna 20 abundances reported here most closely resemble those we have determined in four samples of two Apollo 16 fines, rock 14310, and a clast from breccia 15459. The Luna 20 O / Si ratio of 1.96 ± 0.05 is similar to that in most other lunar samples, but the Al / Si ratio of 0.532 ± 0.024 is exceeded only by our data on the Apollo 16 fines. This Al / Si ratio is in agreement with the value of 0.55 ± 0.06 determined by the remote X-ray fluorescence experiment for the highlands between Mare Crisium and Mare Smythii which lie near the Luna 20 site ( et al. , 1972).

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