月球风暴洋地区元素丰度研究:“嫦娥二号”X射线谱仪探测数据分析

发布时间：2019-06-21 08:59

【摘要】：月球表面的元素丰度是研究月表物质分布的基础数据,可以提供月球地质演化历史的重要信息。探月工程"嫦娥二号"卫星搭载了一台X射线谱仪,自2010年10月1日发射以来,获得了丰富的观测数据。在X射线谱仪长达7个月的对月球观测期间,发生过多次太阳爆发。文中利用2011年2月16日9时一次太阳M级爆发事件时X射线谱仪的观测数据,建立了定量反演元素丰度的方法,获得了月球正面风暴洋地区Mg、Al、Si、Ca和Fe的含量。通过各区域的元素含量比较,从风暴洋南部沿飞行轨迹向北,Si含量逐渐升高,这种差异可能反映了不同时期玄武岩浆的成分差异。Ⅱ区域的Fe含量高于其他5个区域,但Ca、Mg、Al含量低于其他5个区域,说明II区域相对其他地区受高地物质的混染影响较小。月球风暴洋中6个探测区域的元素平均含量分别是Mg 7.3%、Al 8.4%、Si 15.8%、Ca 6.0%、Fe 18.6%。最后,分析了"嫦娥二号"XRS数据反演月表元素含量可能存在的误差。
[Abstract]:The element abundance of the lunar surface is the basic data for studying the distribution of the lunar surface material, which can provide important information on the history of the lunar geological evolution. The lunar engineering "Chang 'e-2" satellite is equipped with an X-ray spectrometer, and has obtained abundant observation data since it was launched on October 1,2010. A number of solar bursts have occurred during the 7-month observation of the moon in the X-ray spectrometer. The content of Mg, Al, Si, Ca and Fe in the sea area of the lunar surface was obtained by using the observation data of the X-ray spectrometer at the time of the M-scale explosion at 9:00 on February 16,2011. Through the comparison of the elements in each region, the content of Si is gradually increased from the south of the storm to the north along the flight path, which may reflect the composition difference of the basalt slurry in different periods. The Fe content in the II region is higher than that of the other 5 regions, but the content of Ca, Mg and Al is lower than that of the other 5 regions, indicating that the mixed-dyeing effect of the high ground substance in the region II is small. The mean content of the elements in the six detection areas in the lunar storm ocean was Mg 7.3%, Al 8.4%, Si 15.8%, Ca 6.0%, and Fe 18.6%, respectively. Finally, the error of the element content of the monthly table element in the data of the "Chang 'e-2" XRS is analyzed.
【作者单位】：中国科学院月球与深空探测重点实验室;中国科学院国家天文台;中国科学院大学;中国科学院月球与深空探测重点实验室;;中国科学院国家天文台;
【基金】：西部之光人才培养计划“联合学者”项目(048/2012/A2)~~
【分类号】：P184.5

【参考文献】