Impact melt products (melt rocks and glasses) of known provenance are the key to unveiling the bombardment history of the Moon (Morbidelli et al., 2018;Stöffler, 2006;Zellner, 2019). The current debates on the impact flux have arisen because we do not have impact melt samples that are confirmed to have been derived from the basins. So, the provenance of impact melt is important. Impact melt products formed from materials that were molten due to the high temperatures resulting from high-velocity impact events (French, 1998;Melosh, 1989;Stöffler et al., 2017). In ideal cases, the radioisotopic systems of the impact melt products are reset, recording the age of the respective impact event. Combining the age information with the distribution of the impact melt can then be useful for study the impact flux (McDougall & Harrison, 1999;Morbidelli et al., 2018;Wilhelms, 1987). However, the generated impact melt can be altered, redistributed, and even destroyed by subsequent impacts. The long-term impact mixing makes the distribution of impact melts

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