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The Lunar Prospector (LP) Gamma‐Ray Spectrometer (GRS) has been used to map the global abundance of thorium on the lunar surface. A global map of absolute thorium abundances on a 2° by 2° equal‐area pixel scale is presented using new detector modeling results and low altitude LP data. Because thorium is relatively abundant in KREEP‐rich material, these data provide fundamental information regarding the locations and importance of terranes that are rich in KREEP bearing materials.
Lawrence et al. (Wed,) studied this question.
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