A Serenitatis origin for the Imbrian grooves and South Pole-Aitken thorium anomaly

Abstract

The northwest corner of the MoonÕs South Pole-Aitken (SPA) basin contains a high abundance of thorium and a unique Imbrian aged geomorphologic unit that consists of Ògrooves and moundsÓ (referred to here as the Imbrian grooves). Because the location of these features are almost antipodal to the Imbrium basin, where high-thorium ejecta and seismic energy are… (More)

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