论文库--中国科学院地球化学研究所

论文题目:	Evolution of lunar magma ocean and crust formation under initial conductive lid
全部作者:	Xu YingKui; Li XiongYao; Zhu Dan; Wang ShiJie
第一作者:	Xu YingKui
联系作者:	ZHU Dan
刊物名称:	ACTA PETROLOGICA SINICA
发表年度:	2016
卷:	32
期:	1
页码:	1-9
摘要:	The early state of the Moon is thought to be Lunar Magma Ocean (LMO). Studies of LMO not only have significant meaning for recognizing the internal structure of the Moon, but also can be indicative for the origin of the Moon and planets. The dominated model of the LMO suggests that after 80% of the LMO solidified, plagioclase starts to crystallize and floats to the surface to form anorthositic crust and the whole solidifying time for the LMO is only several million years. The dominated model has discrepancy with the Apollo observations that crystallization age of anorthosites span 270Myr. To solve this problem, we focus on the temperature gradient in the LMO and apply mass transport under thermal gradient to its evolution. Chemical heterogeneity can occur in the initially homogenous silicate melt under thermal gradient, which is named thermal diffusion. Our working model is: the LMO is stratified in composition, and the lunar crust is formed from the upper part-the partially crystallizing zone. Calculations of An of plagioclase and the speed of diapirs also support this crust-forming model.
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