| 光谱学与光谱分析 |
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| Spectral Feature and Mg Number (Fo#) Analysis of Olivine in Sinus Iridium |
| ZHOU Chao1, 2, ZHANG Yuan-zhi2, CHEN Sheng-bo1*, YANG Qian3, HUANG Shuang1 |
1. College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China
2. Key Laboratory of Lunar and Deep Space Exploration, Chinese Academy of Sciences, Beijing 100012, China
3. College of Surveying and Prospecting Engineering, Jilin Jianzhu University, Changchun 130018, China |
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Abstract The research on the distribution and component of olivine is one of great significance to evaluate the geologic evolution of igneous planetary bodies such as the Moon. In this paper, the Sinus Iidium, as the survey region, was explored by Chang’s serial satellite. Here we present an olivine survey of the Sinus Iridium by using Spectral Feature Fitting (SFF) method based on the M3 data. The exposures of olivine were located in the northern crater wall and at the foot of Montes Jura, which were associated with plagioclase and little anorthosite. The stratigraphic units of the located formation were the interior crater slopes and debris ejected from the impact-formed Iridium crater, and the geological age was relatively older. The Mg number of the lunar olivine samples was dependent variables, and the band center of the lunar olivine spectrums were independent, which derived from the fitting analysis using Modified Gaussian Model (MGM). The quantitative inversion models of Mg number (Fo#) of the lunar olivine is established with multiple linear regression analysis. On this basis, the Mg number of the olivine rich point in the Sinus Iridium are calculated with quantitative inversion models of Mg number (Fo#). The result shows that, the Fo# of olivine in the Sinus Iridium are relatively high. The mean value of Fo# is Fo~80.84. As mantle olivine would be expected to be quite Mg-rich, it is suggested that at the vast majority of the olivine detected in the Sinus Iridium come from upper mantle of the Moon.
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Received: 2015-08-17
Accepted: 2015-12-22
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Corresponding Authors:
ZHOU Chao
E-mail: chensb@jlu.edu.cn
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