Luna 20 soil: abundance of 17 trace elements

Details Luna 20 soil: abundance of 17 trace elements Luna 20 soil: abundance of 17 trace elements

Apr 1973

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1973gecoa..37..953m&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 37, Issue 4, pp.953-961

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Scientific paper

Luna 20 soil is remarkably similar to Apollo 16 soil, in its content of 17 mainly volatile or siderophile elements: Ag, Au, Bi, Br, Cd, Cs, Ge, In, Ir, Rb, Re, Sb, Se, Te, Tl, U, and Zn. Like other highland soils, it seems to contain an ancient meteoritic component of fractionated, volatile-poor composition. The bulk soil has a high Tl / Cs ratio (9.4 × 10 -2 ), similar to that in Apollo 16 soils (5.4 × 10 -2 ), but higher than that in samples from other sites (1.1 × 10 -2 ). It is severely contaminated with Ag, Cd, Re, and Sb, judging from a comparison with a 1.7 mg soil breccia sample from the coarse fraction of the soil.

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