The lunar surface was mapped with respect to Mg, Al and Si as Al/Si and Mg/Si 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 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 Al/Si and Mg/Si chemical ratios correspond to those for anorthositic gabbro 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. (Author)


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    Title :

    APOLLO 16 Geochemical X-Ray Fluorescene Experiment Preliminary Report


    Contributors:
    I. Adler (author) / J. Trombka (author) / J. Gerard (author) / P. Lowman (author) / R. Schmadebeck (author)

    Publication date :

    1972


    Size :

    23 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English




    Apollo 16 geochemical X-ray fluorescene 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.

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


    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

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