Dependence of the hydration of the lunar surface on the concentrations of TiO2, plagioclase, and spinelстатья
Статья опубликована в высокорейтинговом журнале
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Дата последнего поиска статьи во внешних источниках: 4 марта 2022 г.
Аннотация:We investigate the interrelation between the hydration of the lunar regolith and the mineralcomposition of the surface of the Moon with respect to the concentrations of plagioclase, TiO2(highly correlated with the oxide mineral ilmenite), and Mg-spinel. The spectral properties of lunar regions with a low concentration of plagioclase or a high concentration of TiO2 or Mg-spinel show a significant reduction in hydration at lunar midday compared to other compositions. This suggests that these oxide minerals contain less of the strongly bound OH component, which is not removed at lunar midday. The time-of-day-dependent variation of the 3 micron band depth is greater in TiO2-rich areas compared to other mare regions. The TiO2-rich regions therefore appear to have a strongtendency to adsorb solar wind-induced hydrogen into binding states of low energy that can morereadily desorb and readsorb OH/H2O on a daily basis.