Mapping iron abundances on the surface of Mercury: Predicted spatial resolution of the MESSENGER Gamma-Ray Spectrometer

被引：10
作者：
Peplowski, Patrick N. [1 ]
Blewett, David T. [1 ]
Denevi, Brett W. [1 ]
Evans, Larry G. [2 ]
Lawrence, David J. [1 ]
Nittler, Larry R. [3 ]
Rhodes, Edgar A. [1 ]
Selby, Christina M. [1 ]
Solomon, Sean C. [3 ]
机构：
[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA
[2] Comp Sci Corp, Lanham, MD 20706 USA
[3] Carnegie Inst Sci, Dept Terr Magnetism, Washington, DC 20015 USA
来源：
PLANETARY AND SPACE SCIENCE | 2011年 / 59卷 / 13期
关键词：
Mercury; Gamma-ray spectrometry; Iron; MESSENGER; THORIUM ABUNDANCES; MARINER; 10; REFLECTANCE; REGOLITH; SPECTRA; MOON;
D O I：
10.1016/j.pss.2011.06.001
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
To illustrate the spatial resolution of measurements of Mercury's surface elemental composition by the Gamma-Ray Spectrometer on the MESSENGER spacecraft after one year of orbital observations, we have simulated a global coverage map of the 846-keV iron gamma-ray count rate. The simulated map suggests that distinct geologic units larger than 800 km in horizontal dimension will be discernable when the difference in Fe abundance between adjacent geologic units exceeds 4 wt%. These results imply that the MESSENGER Gamma-Ray Spectrometer dataset will provide useful information for regional geological studies of the surface of Mercury. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1654 / 1658
页数：5
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