| タイトル | The Microstructure of Lunar Micrometeorite Impact Craters |
| 本文（外部サイト） | http://hdl.handle.net/2060/20160002655 |
| 著者（英） | Rahman, Z.; Noble, S. K.; Keller, L. P.; Christoffersen, R. |
| 著者所属（英） | NASA Johnson Space Center |
| 発行日 | 2016-03-21 |
| 言語 | eng |
| 内容記述 | The peak of the mass flux of impactors striking the lunar surface is made up of objects approximately 200 micrometers in diameter that erode rocks, comminute regolith grains, and produce agglutinates. The effects of these micro-scale impacts are still not fully understood. Much effort has focused on evaluating the physical and optical effects of micrometeorite impacts on lunar and meteoritic material using pulsed lasers to simulate the energy deposited into a substrate in a typical hypervelocity impact. Here we characterize the physical and chemical changes that accompany natural micrometeorite impacts into lunar rocks with long surface exposure to the space environment (12075 and 76015). Transmission electron microscope (TEM) observations were obtained from cross-sections of approximately 10-20 micrometers diameter craters that revealed important micro-structural details of micrometeorite impact processes, including the creation of npFe (sup 0) in the melt, and extensive deformation around the impact site. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| レポートNO | JSC-CN-35097 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
