6:15 PM - 7:30 PM
[PPS23-P05] Mineral distribution on lunar highland in the southwest sector of the Crisium basin with SELENE MI
Keywords:SELENE, MI, the Moon, Highland, Plagioclase, Mare Crisium
Possible mineral outcrops are identified at which deep absorptions are found in continuum-removed spectra of MI. Position of absorption centers of plagioclase, olivine, and pyroxene are 1250, 1050, and 950 nm, respectively. Most outcrops are associated to craters in the target regions. They are often found on the inner wall and the ejecta blanket of craters.
Plagioclase outcrops exhibit PAN (purest-anorthosite) like spectra with the clear 1250 nm absorption that was reported by Ohtake et al. (2009) and Yamamoto et al. (2012). Most of them are found at small craters with diameter of < 1 km, whereas Ohtake et al. (2009) reported that PAN were found mainly on craters with diameter of > 30 km. However, our researched region is placed adjacent or within the Crisium basin. As Yamamoto et al. (2012) suggested, PAN blocks could be excavated from deep region of the highland crust by the Crisium basin impact event. We also confirm an observation by Yamamoto et al. (2012) that olivine outcrops also associate with PAN exposures in this region.