Lunar X-ray fluorescence observations by the Chandrayaan-1 X-ray Spectrometer (C1XS): Results from the nearside southern highlands

Lunar X-ray fluorescence observations by the Chandrayaan-1 X-ray Spectrometer (C1XS): Results from the nearside southern highlands
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Chandrayaan-1 X 射线光谱仪 (C1XS) 进行的月球 X 射线荧光观测:来自近侧南部高地的结果

DOI:
10.1016/j.icarus.2011.04.010
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发表时间:
2011
期刊:
影响因子:
3.2
通讯作者:
Fernandes
Fernandes
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Narendranath;Athiray;Sreekumar;Kellett;Grande;Huovelin;Crawford;Unnikrishnan;Lalita;Subramaniam;Weider;Nittler;Gasnault;Rothery;Fernandes

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在印度第一次月球使命月船一号飞行任务上搭载的月船一号X射线光谱仪(C1 XS)在其2009个月的运行期间测量了几次太阳耀斑期间的X射线荧光光谱。随附的X射线太阳监测器(XSM)提供了入射到月球上的太阳X射线的同步光谱,这对推导元素化学是必不可少的。在本文中,我们提出了表面的Mg,Al,Si,Ca和Fe的丰度,来自C1 XS数据的高地地区的南部近月。分析技术进行了详细描述,包括绝对X射线线通量推导和转换成元素丰度。结果是一致的斜长石与轻微的镁铁质矿物增强和钙/铝比,这是显着低于测得的月球返回的样本丰富的组合物。我们提出了各种可能的情况来解释偏差。
The Chandrayaan-1 X-ray Spectrometer (C1XS) flown on-board the first Indian lunar mission Chandrayaan-1, measured X-ray fluorescence spectra during several episodes of solar flares during its operational period of ∼9 months. The accompanying X-ray Solar Monitor (XSM) provided simultaneous spectra of solar X-rays incident on the Moon which are essential to derive elemental chemistry. In this paper, we present the surface abundances of Mg, Al, Si, Ca and Fe, derived from C1XS data for a highland region on the southern nearside of the Moon. Analysis techniques are described in detail including absolute X-ray line flux derivation and conversion into elemental abundance. The results are consistent with a composition rich in plagioclase with a slight mafic mineral enhancement and a Ca/Al ratio that is significantly lower than measured in lunar returned samples. We suggest various possible scenarios to explain the deviations.
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