MengHua Zhu1; Jin Chang2; Tao Ma2
Source Publication天文和天体物理学研究英文版
AbstractWe present the thorium distribution on the lunar surface derived from observations by the Chang’E-2 gamma-ray spectrometer(CE-2 GRS). This new map shows a similar thorium distribution to previous observations. In combination with this new thorium map and impact cratering model, we investigate the origination of thorium on the Moon’s highlands, which was previously thought to be contributed from Imbrium ejecta. We found that the Imbrium ejecta has a small contribution(~20%–30%) to the thorium on the lunar highlands but most thorium is likely to be indigenous before the deposition of the Imbrium ejecta. This new thorium map also confirms that the eastern highlands have a relatively higher thorium concentration than the western highlands. We propose that the thin crust and large basins on the eastern highlands are responsible for this difference in thorium.
Document Type期刊论文
3.CAS Center for Excellence in Comparative Planetology
Recommended Citation
GB/T 7714
MengHua Zhu,Jin Chang,Tao Ma. thoriumdistributiononthemoonnewinsightsfromchange2gammarayspectrometer[J]. 天文和天体物理学研究英文版,2019,019(006):1.
APA MengHua Zhu,Jin Chang,&Tao Ma.(2019).thoriumdistributiononthemoonnewinsightsfromchange2gammarayspectrometer.天文和天体物理学研究英文版,019(006),1.
MLA MengHua Zhu,et al."thoriumdistributiononthemoonnewinsightsfromchange2gammarayspectrometer".天文和天体物理学研究英文版 019.006(2019):1.
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