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| Title: |
Surface chemistry of selected lunar regions
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| Author(s): |
Bielefeld, M. J.; Reedy, R. C.; Metzger, A. E.; Trombka, J. I.; Arnold, J. R.
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| Abstract: |
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; 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 sixty 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.
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| NASA Center: |
Goddard Space Flight Center; Jet Propulsion Laboratory
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| Publication Date: |
Jun 1, 1976
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| Document Source: |
CASI |
| No Digital Version Available: |
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| Document ID: |
19760021051
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| Accession ID: |
76N28139
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| Publication Information: |
Number of Pages = 32 |
| Report Number: |
NASA-TM-X-71157; X-682-76-149
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| Price Code: |
A03 |
| Keywords: |
LUNAR COMPOSITION; LUNAR RADIATION; LUNAR SOIL; APOLLO 15 FLIGHT; APOLLO 16 FLIGHT; GAMMA RAYS; IRON; LUNAR MARIA; MAGNESIUM; POTASSIUM; RADIOACTIVE ISOTOPES; SPECTROMETERS; THORIUM;
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| Accessibility: |
Unclassified; No Copyright; Unlimited; Publicly available; |
| Updated/Added to NTRS: |
2008-06-30 |
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