Remote sensing and geologic studies of the orientale basin region

Details Remote sensing and geologic studies of the orientale basin region Remote sensing and geologic studies of the orientale basin region

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pggp.rept..220h&link_type=abstract

In NASA, Washington, Reports of Planetary Geology and Geophysics Program, 1990 p 220-222 (SEE N92-10728 01-91)

Physics

Geophysics

1

Imaging Techniques, Lunar Geology, Lunar Maria, Lunar Rocks, Mineralogy, Moon, Remote Sensing, Spectra, Spectroscopy, Surface Properties, Volcanology, Analogies, Anorthosite, Ejecta, Mountains, Pyroxenes

Scientific paper

Both visual and near-infrared spectral observations are combined with multispectral imaging to study the Orientale interior and exterior, the Cruger region, Grimaldi Region, the Schiller-Schickard Region, and the Humorum Region of the Moon. It was concluded that anorthosites occur in the Inner Rook Mountains of Orientale, the inner ring of Grimaldi, and the main ring of Humorum. Imaging spectroscopy shows that the entire eastern Inner Rook Mountains are composed of anorthosites. Orientale ejecta are strikingly like the surface materials in the region where Apollo 16 landed. This similarity indicates similar mineralogy, i.e., noritic anorthosite. Thus, Orientile ejecta is more mafic than the Inner Rook Mountains. This situation is also true for the Nectaris, Humorum, and Gramaldi basins. Isolated areas of the Orientale region show the presence of gabbroic rocks, but, in general, Orientale ejecta are noritic anorthosites, which contain much more low-Ca pyroxene than high-Ca pyroxene. Ancient (pre-Orientale) mare volcanism apparently occurred in several areas of the western limb.

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