Reflectance spectroscopy of lunar meteorite Yamato-791197: Relation to remote sensing data bases of the Moon

• Main Authors: McFadden,Lucy A., Pieters, Carle M., Huguenin,Pobert L., Hawke,B.Roy, King,Trude V.V., Gaffey,Michael J.
• Format: Report
• Language: English
• Published: Astronomy Program, University of Maryland/Department of Geological Sciences, Brown University/Remote Sensing Center, University of Massachusetts/Planetary Geosciences Division, Hawaii Institute of Geophysics, University of Hawaii/Planetary Geosciences Division, Hawaii Institute of Geophysics, University of Hawaii/Geology Department, Rensselaer Polytechnic Institute 1986
• Subjects: Yamato; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1960; http://id.nii.ac.jp/1291/00001960/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1960&item_no=1&attribute_id=18&file_no=1

The major mineralogical components of Yamato-791197 determined from reflectance spectra are calcium-rich clinopyroxene, plagioclase, and <30% olivine. These results are determined from visual examination of spectra in 1.0μm region, with continuum removed and using a multiple-order derivative analysis to detect band positions. Geochemical constraints on the provenance of Y-791197 provided by the Apollo orbital X-ray and γ-ray spectrometers indicate that areas with a surface chemistry like that measured in geochemical analysis of Y-791197 are extremely limited on the central nearside. Only 25% of highland craters spectrally measured on the nearside consist of high-calcium pyroxene. Only one crater, Eimmart A, located on the eastern limb close to Mare Crisium, consists of moderately calcium-rich pyroxene, plagioclase and a significant olivine component.