Mapping of the lunar surface with respect to magnesium, aluminum, and silicon as aluminum/silicon and magnesium/silicon intensity ratios along the projected ground tracks swept out by the orbiting Apollo 16 spacecraft. The results confirm the observations made during the Apollo 15 flight and provide new data for a number of features not covered before. The data are consistent with the idea that the moon has a widespread differentiated crust (the highlands). The aluminum/silicon and magnesium/silicon concentration ratios correspond to those for anorthositic gabbros through gabbroic anorthosites or feldspathic basalts. The X-ray results suggest the occurrence of this premare crust or material similar to it at the Descartes landing site.


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    Title :

    Apollo 16 geochemical X-ray fluorescence experiment - Preliminary report.


    Contributors:
    Adler, I. (author) / Trombka, J. (author) / Gerard, J. (author) / Lowman, P. (author) / Schmadebeck, R. (author) / Blodget, H. (author) / Eller, E. (author) / Yin, L. (author) / Lamothe, R. (author) / Osswald, G. (author)

    Published in:

    Science ; 177


    Publication date :

    1972-07-21


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English


    Keywords :


    Apollo 15 geochemical X-ray fluorescence experiment - Preliminary report.

    Adler, I. / Trombka, J. / Gerard, J. et al. | NTRS | 1972


    Apollo 16 geochemical X-ray fluorescence experiment: Preliminary report

    Adler, I. / Trombka, J. / Gerard, J. et al. | NTRS | 1972


    APOLLO 16 Geochemical X-Ray Fluorescence Experiment Preliminary Report

    I. Adler / J. Trombka / J. Gerard et al. | NTIS | 1972


    APOLLO 16 Geochemical X-Ray Fluorescene Experiment Preliminary Report

    I. Adler / J. Trombka / J. Gerard et al. | NTIS | 1972


    Apollo 16 geochemical X-ray fluorescene experiment: Preliminary report

    Adler, I. / Trombka, J. / Gerard, J. et al. | NTRS | 1972