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^(18)O/^(16)O, ^(30)Si/^(28)Si, D/H, and ^(13)C/^(12)C Studies of Lunar Rocks and Minerals

Epstein, S. and Taylor, H. P., Jr. (1970) ^(18)O/^(16)O, ^(30)Si/^(28)Si, D/H, and ^(13)C/^(12)C Studies of Lunar Rocks and Minerals. Science, 167 (3918). pp. 533-535. ISSN 0036-8075.

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The δ ^(18)O of minerals from lunar gabbros and basalts are: plgioclases +6.06 to +6.33), pyroxenes (+5.70 to +5.95), and ilmenites (+3.85 to +4.12). The uniformity of these results indicates isotopic equilibrium in the mineral assemblages. Estimated plagioclase-ilmenite temperautres range from 1150°C to 1340°C. The bulk ^(18)/^(16)O and ^(30)Si/^(28)Si ratios of these lunar rocks are identical with ratios of terrestrial basalts, but the lunar glass, breccia, and dust are slightly enriched in the heavier isotopes. The lunar hydrogen (formed from solar wind) has a δ D/H of less than—873 per mil and the value may be even lower, as it is probably contaminated with terrestrial hydrogen. The δ ^(13)C of lunar dust and breccia is unusually high relative to reduced carbon in meteorites or on earth.

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Additional Information:© 1970 American Association for the Advancement of Science. Thus research was supported by NASA. Some of the laboratory work was done by P. Yanagasawa. Publications of the Division of Geological Sciences, California Institute of Technology Contribution No. 1706.
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Caltech Division of Geological and Planetary Sciences1706
Issue or Number:3918
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Official Citation:18O/16O, 30Si/28Si, D/H, and 13C/12C Studies of Lunar Rocks and Minerals Samuel Epstein and Hugh P. Taylor Jr. Science 30 January 1970: 167 (3918), 533-535. [DOI:10.1126/science.167.3918.533]
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:62031
Deposited By: Ruth Sustaita
Deposited On:11 Nov 2015 21:26
Last Modified:03 Oct 2019 09:14

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