Platinum-group elements (PGEs) and gold (Au) in the lunar regolith - Routine analysis by ultrasonic nebulization-inductively coupled plasma-mass spectrometry (USN-ICP-MS)

Details Platinum-group elements (PGEs) and gold (Au) in the lunar regolith - Routine analysis by ultrasonic nebulization-inductively coupled plasma-mass spectrometry (USN-ICP-MS) Platinum-group elements (PGEs) and gold (Au) in the lunar regolith - Routine analysis by ultrasonic nebulization-inductively coupled plasma-mass spectrometry (USN-ICP-MS)

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1353s&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 353.

Computer Science

Lunar Composition, Regolith, Gold, Platinum, Ultrasonic Tests, Plasma Spectra, Mass Spectroscopy, Iridium, Lunar Resources, Rhenium, Rubidium, Apollo 12 Flight

Scientific paper

Iridium and Au have been used as the ultimate indicators of chemical pristinity of lunar materials. We discuss a method of routine analysis of a suite of five PGEs and Au in lunar rocks using the USN-ICP-MS technique. We also discuss the distribution of the PGE and Au in the regolith at the Apollo 12 landing site by looking at coarse-grained, presumably highlands materials, basalts, and impact melts. Impact melts have demonstrably higher abundances (3-5x) of Pd and Au and exhibit a uniform positive slope from Ru to Rh to Pt to Pd to Au, when compared to both pristine highlands rocks and mare basalts. Pigeonite basalts have uniformly lower Ru, Rh, Pt, and Pd abundances than ilmenite basalts. Coarse-grained, presumably highlands rocks span a wide range, but generally have higher Ru, Rh, and Pt abundances than the mare basalts. PGE abundances and patterns may prove to be a new and important key to understanding mare basalt sources and an indicator of the degree of pristinity of lunar rocks.

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