Document Type
Article
Publication Date
1977
Abstract
Analysis of Apollo Is low altitude X-ray fluorescence data over Marc Crisium indicates that despitc the relative homogeneity Crisium mare material, small regions of dark marc material in the eastern part of the basin have a lower LAISi intensity ratio than average Crisium mare. Dark mare aterial s characterized by irregular ridges, incomplete crater rims, and a rougher surface than e higher albedo Crisi m le. The morphologic similarity areas of probable pyroclastic origin in pr ir Mare Serenitatis, 2 riations S carth-based radar rcflectivity support an origin by pyroclastic volcani: Lsi ing) Apollo buk: soil analyses. a factor C jfor converting measured AIlS i intensity ralios t0 concentratiom as hes been aleulated tor Apollo 15 X-ray dala. Although the factor veet from |be pplied gh ilitude da use of t the conversion for low data indicate average Crisi are alumin. im concentration is higher than that of 17 jaiLs- E mare units eastern Crisium have aluminum concentrations up to are be M imilar 19 APO 17 basaltic regolith.
Recommended Citation
Maxwell, Ted A., Strain, Priscilla L., and El-Baz, Farouk. 1977. "Mare Crisium: Compositional inferences from low altitude X-ray fluorescence data." In Proceedings of the Lunar and Planetary Science Conference, 8th. 933–944. Houston, Texas. 8