The Effect of Evaporated Salt Solutions on the Optical Dating Properties of JSC Mars-1: "Seasoning" for a Mars Soil Simulant

Details The Effect of Evaporated Salt Solutions on the Optical Dating Properties of JSC Mars-1: "Seasoning" for a Mars Soil Simulant The Effect of Evaporated Salt Solutions on the Optical Dating Properties of JSC Mars-1: "Seasoning" for a Mars Soil Simulant

Aug 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009asbio...9..531l&link_type=abstract

Astrobiology, Volume 9, Issue 6, pp. 531-534.

Biology

Mars Geochronology, Osl Dating, Optical Dating, Halite, Evaporites

Scientific paper

Optically stimulated luminescence dating, or optical dating, is an established terrestrial geochronometric technique that is being adapted to date sedimentary deposits and landforms on the surface of Mars. Recent discoveries have highlighted the astrobiological significance and occurrence of halite on the surface of Mars. The objective of the experiments in this study was to create a simplistic analogue of the sedimentary material that would result from evaporation of ion-containing pore water out of martian regolith and evaluate the influence the evaporated salts would have on in situ optical dating of silicate sediments. The radiation dose response, as measured by infrared stimulated luminescence (IRSL), from evaporated mixtures of JSC Mars-1 and solutions of sodium chloride and calcium sulfate was documented. The results suggest that the presence of CaSO4 and NaCl within the aggregated particles does not have adverse effects on IRSL dose response and that aggregates of this type exhibit dose response characteristics that are appropriate for optical dating.

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