Trapped Solar Wind Noble Gases, Kr 81 /Kr Exposure Ages and K/Ar Ages in Apollo 11 Lunar Material
- 30 January 1970
- journal article
- research article
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 167 (3918) , 558-560
- https://doi.org/10.1126/science.167.3918.558
Abstract
Grain size and etching experiments show that the fine lunar material contains large amounts of trapped solar wind particles. Elemental and isotopic compositions of the noble gases in solar material and in the terrestrial atmosphere are significantly different, except for the Ar36/ Ar38 and the Kr isotope ratios. Exposure ages of two rocks and of the fine material are between 380 and 510 x 106 years. Feldspar concentrates give K/Ar ages of 3220 and 3300 x 106 years, significantly higher than the unseparated rock.Keywords
This publication has 15 references indexed in Scilit:
- The possibility of extinct superheavy elements occurring in meteoritesEarth and Planetary Science Letters, 1969
- Apollo 11 Solar Wind Composition Experiment: First ResultsScience, 1969
- Solar-Type Xenon: A New Isotopic Composition of Xenon in the Pesyanoe MeteoriteScience, 1969
- Preliminary Examination of Lunar Samples from Apollo 11Science, 1969
- Glaciation in Southern Argentina More than Two Million Years AgoScience, 1969
- 81Kr in meteorites and81Kr radiation agesEarth and Planetary Science Letters, 1967
- Mass-Spectrometric Detection of Cosmic-Ray-Producedin Meteorites and the Possibility of Kr-Kr DatingPhysical Review Letters, 1967
- ber die Verteilung der Uredelgase im Meteoriten Khor TemikiTschermaks Mineralogische und Petrographische Mitteilungen, 1965
- Meteoritic krypton and barium versus the general isotopic anomalies in meteoritic xenonGeochimica et Cosmochimica Acta, 1962
- Variations in the Isotopic Abundances of Neon and Argon Extracted from Radioactive MineralsPhysical Review B, 1954