Lunar surface heat flow mapping from radioactive elements measured by Lunar Prospector

	Lunar surface heat flow mapping from radioactive elements measured by Lunar Prospector
	Dan Zhang; Xiongyao Li; Qingxia Li; Liang Lang; Yongchun Zheng
	2014
发表期刊	Acta Astronautica
卷号	99 期号:1 页码:85-91
摘要	An accurate estimate of global surface heat flow is important because it provides strong constraints on interior thermal model and understanding of the thermal state and geologic evolution of the Moon. In this paper, a distribution map of lunar surface heat flow is derived from calibrated Lunar Prospector gamma-ray spectrometer data (K, U and Th abundances). It shows that surface heat flow varies regionally from about 10.6 mW/m(2) to 66.1 mW/m(2), which is in the same order of magnitude as previous results. In the calculation, lunar surface heat flow includes the heat flow from the non-uniform distribution of radioactive elements K, U and Th and that from secular cooling of the Moon. The calculation of heat flow from radioactive elements is based on the assumption that the radioactive decay of K, U and Th on the Moon is the same as that on the Earth. The heat flow from secular cooling of the Moon is assumed to be equal to the global average radioactive heat flow. Firstly we construct a relationship between radioactive elements K, U and Th and lunar surface heat flow. The key parameter of the characteristic length scale in the relationship is determined by measured surface heat flow and Th abundances at Apollo 15 and 17 landing sites. Then the distribution of lunar surface heat flow is derived by combining other parameters such as lunar crustal thickness measured by Clementine and lunar crustal density. In addition, correlation analysis of the three radioactive elements is carried out due to the higher resolution of Th abundance and for ease of calculation.
关键词	Lunar Surface Heat Flow Radioactive Elements Heat Production Rate
学科领域	月球与行星科学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/5215
专题	月球与行星科学研究中心_月球与行星科学研究中心_期刊论文
推荐引用方式 GB/T 7714	Dan Zhang,Xiongyao Li,Qingxia Li,et al. Lunar surface heat flow mapping from radioactive elements measured by Lunar Prospector[J]. Acta Astronautica,2014,99(1):85-91.
APA	Dan Zhang,Xiongyao Li,Qingxia Li,Liang Lang,&Yongchun Zheng.(2014).Lunar surface heat flow mapping from radioactive elements measured by Lunar Prospector.Acta Astronautica,99(1),85-91.
MLA	Dan Zhang,et al."Lunar surface heat flow mapping from radioactive elements measured by Lunar Prospector".Acta Astronautica 99.1(2014):85-91.

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