Composition of Orientale basin deposits and implications for the lunar basin-forming process

Details Composition of Orientale basin deposits and implications for the lunar basin-forming process Composition of Orientale basin deposits and implications for the lunar basin-forming process

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpsc...15..197s&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 15th, Houston,

Mathematics

Logic

20

Lunar Composition, Lunar Craters, Lunar Geology, Mineral Deposits, Structural Basins, Anorthosite, Basalt, Ejecta, Geochemistry, Lunar Exploration, Lunar Photography, Lunar Surface, Spectral Reflectance, Moon, Composition, Basins, Orientale Mare, Deposits, Formation, Ringed Features, Models, Ejecta, Composition, Earth-Based Observations, Reflectance, Spectra, Geochemistry, Apollo Missions, Orbiters, Size, Anorthosite, Rings, Shock Effects, Photogeology, Diameter, Depth, Physical Properties, Crust, Thickness

Scientific paper

The geologic, spectral and geochemical characteristics of the lunar Orientale basin are discussed, and a model is defined for the generation of Orientale basin deposits. The data indicate that the basin ejecta is composed mainly of anorthositic deposits and no crustal material. The crater was originally 500-600 km across and 50-60 km deep, the latter being too shallow to reach the projected 100 km crustal depth. A proportional growth model is judged acceptable for the Orientale basin. Finally, it is concluded that neither the Apollo 14 nor 16 missions obtained Orientale ejecta material, which could in any case be unidentifiable until more thorough samplings are made of a large portion of the lunar surface.

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