嫦娥二号γ谱数据反演月表Fe元素分布

发布时间：2018-03-09 16:57

本文选题：嫦娥二号　切入点：γ射线　出处：《中国科学:物理学力学天文学》2016年02期 　论文类型：期刊论文

【摘要】：Fe作为重要的成岩元素之一,其月表含量和分布特征对于认识月球岩石成因和岩浆演化具有重要指示意义.本文由嫦娥二号γ谱仪2C级数据出发,经过谱线筛选、宇宙线校正、能谱累积与本底处理后提取Fe峰计数率.我们借助月球勘探者号的热中子数据进行中子校正,之后结合月球样品、陨石与嫦娥三号的就位探测数据标定Fe元素丰度.嫦娥二号γ谱仪全月Fe分布图中月海玄武岩区域与Fe元素富集区域吻合,其中风暴洋和雨海中部为Fe含量高值区域(Fe O23 wt.%),南极艾肯盆地内也出现Fe的相对富集,而月陆区域Fe含量较低(Fe O8 wt.%).与月球勘探者号g谱仪的探测结果相比,嫦娥二号γ谱仪解算的Fe元素丰度(Fe O)平均偏低0.7 wt.%.
[Abstract]:As one of the important diagenetic elements, the monthly surface contents and distribution characteristics of Fe play an important role in understanding the genesis of lunar rocks and magma evolution. Based on the 2C data of Chang'e 2 纬 spectrometer, the cosmic ray is corrected by screening the spectrum lines. Energy spectrum accumulation and background processing are used to extract the Fe peak counting rate. We use the thermal neutron data from the lunar prospector to correct the neutron, and then combine the lunar sample. The isotopic data of meteorite and Chang 'e-3 were used to calibrate the abundance of Fe elements. The distribution of Fe in the whole moon Fe distribution map of Chang 'e-2 gamma-ray spectrometer coincided with the enrichment area of Fe element in the Yuehai basalt area. In the middle of Storm Ocean and Rain Sea, the high value area of Fe content is Fe O 23 wt. and the relative enrichment of Fe is also observed in the Aiken basin, Antarctica, while the content of Fe in the continental area is lower than that in the lunar land area, which is compared with the results of the Lunar Prospector g spectrometer. The average Fe abundance calculated by Chang 'e-2 纬 spectrometer is lower than 0.7 wt.
【作者单位】：山东大学空间科学研究院山东省光学天文与日地空间环境重点实验室;中国科学院月球与深空探测重点实验室;中国科学院地球化学研究所;
【基金】：国家自然科学基金(批准号:U1231103,41473065,41373068,41490634) 山东省自然科学基金(编号:JQ201511,ZR2015DQ001) 中国科学院重点部署项目(编号:KGZD-EW-603) 中国科学院月球与深空探测重点实验室开放基金山东大学(威海)青年学者未来计划资助
【分类号】：P184.5

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