Experimental Approaches to Space Weathering

Details Experimental Approaches to Space Weathering Experimental Approaches to Space Weathering

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27...15a&link_type=abstract

Lunar and Planetary Science, volume 27, page 15

Mathematics

Logic

2

Maturity, Regolith, Soil: Lunar, Weathering: Space

Scientific paper

The process of space weathering in lunar soil (maturation) includes the combined effects of micrometeorite impacts and solar wind interactions. Impacts melt small volumes of soil containing solar wind hydrogen and carbon. The melt quenches rapidly to agglutinitic glass in a strongly reducing environment. Glass formation under these conditions causes reduction of Fe2+ in the glass to nanophase (~4-33 nm) iron metal (np-Fe0). Space weathering also produces distinct changes in the reflectance spectra of lunar soils. With increasing maturity overall soil albedo is reduced, spectral contrast is diminished, and the continuum slope is increased. We are attempting to duplicate the effects of space weathering in the laboratory using hydrogen reduction at subsolidus temperatures. Alterations induced in the mineralogical and optical properties of 17 lunar soils resemble changes caused by natural space weathering.

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