Other
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.2661b&link_type=abstract
In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 3. (A77-34651 15-91) New York, Pergamon
Other
23
Gamma Rays, Geochemistry, Ground Truth, Lunar Surface, Satellite-Borne Instruments, X Ray Spectroscopy, Apollo 15 Flight, Apollo 16 Flight, Bremsstrahlung, Error Analysis, Remote Sensors
Scientific paper
A completely new analysis has been carried out on the data from the Apollo 15 and 16 gamma-ray spectrometer experiments. The components of the continuum background have been estimated. The elements Th, K, Fe, and Mg give useful results; for Ti are significant only for a few high-Ti regions. Errors are given, and the results are checked by other methods. Concentrations are reported for about 60 lunar regions; the ground track has been subdivided in various ways. The borders of the maria seem well-defined chemically, while the distribution of KREEP is broad. This wide distribution requires emplacement of KREEP before the era of mare formation. Its high concentration in western mare soils seems to require major vertical mixing.
Arnold James R.
Bielefeld M. J.
Metzger Albert E.
Reedy Robert C.
Trombka Jacob I.
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