| タイトル | Early Impacts on the Moon: Crystallization Ages of Apollo 16 Melt Breccias |
| 本文（外部サイト） | http://hdl.handle.net/2060/20070008111 |
| 著者（英） | Bogard, D. D.; Taylor, L. A.; Shih, C.-Y.; Norman, M. D.; Nyquist, L. E. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2007-01-01 |
| 言語 | eng |
| 内容記述 | A better understanding of the early impact history of the terrestrial planets has been identified one of the highest priority science goals for solar system exploration. Crystallization ages of impact melt breccias from the Apollo 16 site in the central nearside lunar highlands show a pronounced clustering of ages from 3.75-3.95 Ga, with several impact events being recognized by the association of textural groups and distinct ages. Here we present new geochemical and petrologic data for Apollo 16 crystalline breccia 67955 that document a much older impact event with an age of 4.2 Ga. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| 権利 | Copyright, Distribution as joint owner in the copyright |
