Investigation of Lunar Mare Basalts: An Integrated Approach

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Basalt, Lunar Maria, Titanium Oxides, Volcanology, Selenology, Lunar Geology, Lunar Crust, Geochemistry, Lunar Rocks, Lunar Surface

Scientific paper

From previous studies we know that 17% of the lunar surface is covered by mare basalts, most of them exposed in the large impact basins of the lunar nearside. From these investigations we also know that lunar mare basalts exhibit a broad variety of ages as well as geochemical compositions. Here we present ages that are based on crater size-frequency distributions for spectrally defined lunar nearside mare basalts that are exposed in the Australe, Tranquillitatis, Humboldtianum, Serenitatis, and Imbrium Basins. We also present geochemical data for the Ti concentrations of mare basalts in Mare Tranquillitatis, Mare Humorum, Mare Serenitatis, and Mare Imbrium. From the lunar sample collection it is known that Ti-poor basalts are generally younger than Ti-rich basalts. On the other hand, we learned from remote-sensing data that there are also young basalts with high TiO2 concentrations. Therefore, in this study, we investigate the relations up ages and TiO2 concentrations, and we also stress the question of whether there is a correlation between these two parameters and what kind of correlation it is. Additionally, we discuss the influence of topography and crustal thickness on basalt eruptions on the lunar surface.

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