Heating technique for investigating trace element distribution in grains

Sorensen, J.; Wegmüller, F.; Krähenbühl, Urs

doi:10.1063/1.1136532

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The Volatility Of Hg Under Lunar Conditions Was Demonstrated By1

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1982

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“…The concentrations of volatile elements in this sample are compared to a sunlit reference soil. In order to obtain more information about processes leading to the observed enrichments, we analyzed grain-size separated mineral and agglutinate fractions by our heating technique [WegmMler et al, 1980;S6rensen et al, 1981] which allows us to determine surface deposits without contributions from the interior of the grains.…”

Section: The Volatility Of Hg Under Lunar Conditions Was Demonstrated Bymentioning

confidence: 99%

Low temperature volatilization on the Moon

Gunten¹,

Wegmüller²,

Krähenbühl³

1982

J. Geophys. Res.

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The concentrations of volatile elements in grain‐size separated agglutinate and mineral fractions of samples 76240 (permanently shadowed) and 76260 were compared in heating experiments. The surface concentrations of Hg were found to be considerably higher in the shadowed sample. For the rest of the investigated elements only small or insignificant differences in the concentrations were observed between the two samples which differ in the storage temperature during the last 104 y. The difference in the concentrations of Hg must be the result of the shadowing. Based on the present investigation and on our earlier heating experiments, it can be concluded that Hg and Cd are mobilized by solar heating of the uppermost lunar soil and are trapped in cold places on the moon. This low‐temperature volatilization leads to a redistribution of volatiles (e.g., Hg and Cd) on the lunar surface.

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Section: The Volatility Of Hg Under Lunar Conditions Was Demonstrated Bymentioning

confidence: 99%