期刊
GEOPHYSICAL RESEARCH LETTERS
卷 44, 期 8, 页码 3485-3492出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2017GL072652
关键词
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资金
- National High Technology Research and Development Program of China (863 Program) [2015AA123704]
- National Natural Science Foundation of China [41422110, 41490633]
- Science and Technology Development Fund of Macau [020/2014/A1]
- Minor Planet Foundation of Purple Mountain Observatory
- Chinese Academy of Sciences President's International Fellowship Initiative [2015VEB057]
- NASA Lunar Data Analysis Program [NNX16AN55G]
- NSERC
- Canadian Space Agency
- NASA [NNX16AN55G, 899078] Funding Source: Federal RePORTER
Submicroscopic metallic iron (SMFe) created by space weathering has strong effects on the optical properties of the lunar surface. Spectra measured in situ by the visible-near-infrared spectrometer (VNIS) on board the Chang'E-3 Yutu rover were used to investigate optical maturity differences at the CE-3 landing site caused by lander exhaust. SMFe abundances were estimated using Hapke's radiative transfer model. Analysis of the spectrum for a minimally disturbed soil indicates that it contains 0.368 wt% SMFe, corresponding to an I-s/FeO maturity index of similar to 53 and indicating that the landing site is submature. The soil at a location that was more disturbed contains 0.217 wt% SMFe, suggesting that the material removed by the rocket blast is more weathered than the regolith that remained behind. We conclude that maturity differences related to removal of the finest, highly mature particles play a major role in the observed reflectance changes associated with rocket blast.
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