Apollo 16 Geochemical X-ray Fluorescence Experiment: Preliminary Report | Zendy

I. Adler | Zendy; J. I. Trombka | Zendy; J. Gerard | Zendy; Paul D. Lowman | Zendy; R. Schmadebeck | Zendy; H. W. Blodget | Zendy; E. Eller | Zendy; Lu Yin | Zendy; R. Lamothe | Zendy; G. Osswald | Zendy; P. Gorenstein | Zendy; P. Bjorkholm | Zendy; H. Gursky | Zendy; B. Harris | Zendy

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Apollo 16 Geochemical X-ray Fluorescence Experiment: Preliminary Report

Author(s) -

I. Adler,

J. I. Trombka,

J. Gerard,

Paul D. Lowman,

R. Schmadebeck,

H. W. Blodget,

E. Eller,

Lu Yin,

R. Lamothe,

G. Osswald,

P. Gorenstein,

P. Bjorkholm,

H. Gursky,

B. Harris

Publication year - 1972

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.177.4045.256

Subject(s) - silicon , crust , basalt , geology , magnesium , astrobiology , aluminium , apollo , geochemistry , mineralogy , materials science , metallurgy , physics , zoology , biology

The lunar surface was mapped 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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