Isotopic composition of carbon and hydrogen in some Apollo 14 and 15 lunar samples
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Abstract
Isotopic composition of carbon and hydrogen in some Apollo 14 and 15 lunar samples was determined by use of a newly constructed combustion line that yields low blanks for CO2 and H2. The results from combustion of fines and breccia from Apollo 14 lunar samples and of fines, breccia, and basalt from Apollo 15 were compared with data obtained by heating samples in vacuo to over 1,350°C. The two techniques gave similar results. Total carbon in the fines ranged from 51 to 110 p/m with a C13 of +12 to -8 per mil (parts per thousand) PDB. The breccias contain 22 to 50p/mcarbon with a C13 of -21 to -25 per mil. The crystalline rock (sample 15555) has a carbon content of about 7 p/m and a C13 of -28 per mil. The total hydrogen in the fines ranges from 66 to 120 p/m with a (D/H) X 10-6 of 39 to 90. The breccias contain 8 to 38p/mH2 with a (D/H) X 10-6 of 103 to 144. The crystalline rock contains about 2 p/m H2 with a (D/H) X 10-6 of about 140. Arguments are presented to show that the contamination by earth materials is not as serious a problem as has been proposed by previous authors.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Isotopic composition of carbon and hydrogen in some Apollo 14 and 15 lunar samples |
| Series title | Journal of Research of the U.S. Geological Survey |
| Volume | 2 |
| Issue | 1 |
| Year Published | 1974 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Description | 6 p. |
| First page | 7 |
| Last page | 12 |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |