Ohtake and others, 2009
Using the Multiband Imager on the Kaguya orbiter, mission scientists deduced the anorthosite content of 69 craters, finding that all large fresh craters have nearly pure anorthosite, supporting the proposal of a global magma ocean.
Table 1 includes anorthosite abundance and optical maturity index for 69 mostly fresh craters.
A = >98% anorthosite (pure)
B = 90-98% anorthosite
C = <90% anorthosite
Optical maturity index values > 0.6 mean the crater is fresh. Note that Copernicus is not fresh enough to be considered fresh.
- Ohtake et al. (2009) The global distribution of pure anorthosite on the Moon. Nature, Vol 461, 10 September 2009, pp. 236-240. (doi:10.1038/nature08317)
- Table of crater anorthosite composition.