Volatility in the lunar crust: Trace element analyses of lunar minerals by PIXE proton microprobe

Details Volatility in the lunar crust: Trace element analyses of lunar minerals by PIXE proton microprobe Volatility in the lunar crust: Trace element analyses of lunar minerals by PIXE proton microprobe

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1091n&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1091-1092 (SEE N94-20636 05-91

Computer Science

Abundance, Lunar Composition, Lunar Crust, Lunar Geology, Lunar Rocks, Magma, Meteoritic Composition, Mineralogy, Minerals, Trace Elements, Volatility, Anorthosite, Breccia, Chondrites, Feldspars, Highlands, Microanalysis, Silicates, Sulfides

Scientific paper

In situ determination of mineral compositions using microbeam techniques can characterize magma compositions through mineral-melt partitioning, and be used to investigate fine-grained or rare phases which cannot be extracted for analysis. Abundances of Fe, Mn, Sr, Ga, Zr, Y, Nb, Zn, Cu, Ni, Se, and Sb were determined for various mineral phases in a small number of lunar highlands rocks using the PIXE proton microprobe. Sr/Ga ratios of plagioclase and Mn/Zn ratios of mafic silicates show that the ferroan anorthosites and Mg-suite cumulates are depleted in volatile lithophile elements to about the same degree compared with chondrites and the Earth. This links the entire lunar crust to common processes or source compositions. In contrast, secondary sulfides in Descartes breccia clasts are enriched in chalcophile elements such as Cu, Zn, Ni, Se, and Sb, and represent a potential resource in the lunar highlands.

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