| タイトル | Analyzing the Chemical and Spectral Effects of Pulsed Laser Irradiation to Simulate Space Weathering of a Carbonaceous Chondrite |
| 本文（外部サイト） | http://hdl.handle.net/2060/20170001964 |
| 著者（英） | Thompson, M. S.; Christoffersen, R.; Loeffler, M. J.; Graff, T. G.; Keller, L. P.; Rahman, Z.; Morris, R. V. |
| 発行日 | 2017-03-20 |
| 言語 | eng |
| 内容記述 | Space weathering processes alter the chemical composition, microstructure, and spectral characteristics of material on the surfaces of airless bodies. The mechanisms driving space weathering include solar wind irradiation and the melting, vaporization and recondensation effects associated with micrometeorite impacts e.g., [1]. While much work has been done to understand space weathering of lunar and ordinary chondritic materials, the effects of these processes on hydrated carbonaceous chondrites is poorly understood. Analysis of space weathering of carbonaceous materials will be critical for understanding the nature of samples returned by upcoming missions targeting primitive, organic-rich bodies (e.g., OSIRIS-REx and Hayabusa 2). Recent experiments have shown the spectral properties of carbonaceous materials and associated minerals are altered by simulated weathering events e.g., [2-5]. However, the resulting type of alteration i.e., reddening vs. bluing of the reflectance spectrum, is not consistent across all experiments [2-5]. In addition, the microstructural and crystal chemical effects of many of these experiments have not been well characterized, making it difficult to attribute spectral changes to specific mineralogical or chemical changes in the samples. Here we report results of a pulsed laser irradiation experiment on a chip of the Murchison CM2 carbonaceous chondrite to simulate micrometeorite impact processing. |
| NASA分類 | Lunar and Planetary Science and Exploration |
| レポートNO | JSC-CN-38833 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
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