| Summary: | The study of mare basalts in microwave range will be of great significance to better understand the basaltic units with complex surface contaminations, particularly in Mare Nubium. In this article, the China Chang'E-2 Lunar Microwave Sounder data and the generated normalized brightness temperature (nTB) and brightness temperature difference (dTB) maps are employed to evaluate the basaltic units in Mare Nubium. The results are as follows. First, two regions with hot anomaly are found, which is likely brought by the high substrate temperature. The anomaly in central Nubium is extensive in range and high in intensity. Second, the nTB and dTB performances can pursue the mare deposits contaminated by the impact ejecta, which reveals special mare basalt with the thin layer in the southeastern part of Mare Nubium. Third, the nTB and dTB maps indicate the complexity of the mare deposits in Mare Nubium. Fourth, the cold dTB anomaly in the western part is proposed as the floor deposits produced during the formation of the Nubium basin. These unusual findings will be of fundamental significance to better understand the basaltic volcanism and the thermal evolution of the Moon.
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