Microwave Thermophysical Features of Apollo Basin and its Geologic Significance

Apollo Basin locates within the large South Pole-Aitken Basin (SPA). The study on Apollo Basin will provides some interesting information about the composition and thermal state of the shallow Moon crust. In this paper, the normalized brightness temperature $(\mathrm{n}T_{B})$ maps and the (FeO + TiO 2 ) abundance (FTA) were systematically combined to study the thermal behaviors of Apollo Basin. The results firstly indicate a strong correlation between the $\mathrm{n}T_{B}$ behaviors and the FTA. Secondly, the low $\mathrm{n}T_{B}$ behaviors hint the homogeneity of the Moon crust in the thermophysical parameters. Finally, the abnormally high $\mathrm{n}T_{B}$ behaviors in the western of the Basin floor probably imply the existence of the pyroclastic deposits.