月球起源研究进展  

Recent Advances of Lunar Formation Theories

作　　者：许英奎[1,2] 朱丹[1] 王世杰[3] 刘耘[1] 

机构地区：[1]中国科学院地球化学研究所矿床地球化学国家重点实验室,贵阳550002 [2]中国科学院研究生院,北京100040 [3]中国科学院地球化学研究所月球与行星科学研究中心,贵阳550002

出　　处：《矿物岩石地球化学通报》2012年第5期516-521,共6页Bulletin of Mineralogy, Petrology and Geochemistry

基　　金：国家863计划资助项目(2010AA1222)

摘　　要：月球是地球唯一的天然卫星,早期学者认为地月系统是普遍存在的行星-卫星系统的一员,但是月球又有许多特征,如质量异常大,挥发分和Fe元素亏损等,传统理论难以解释这些特征。因此,针对月球的起源提出了四种学说:捕获理论,共增生理论,分裂理论和大碰撞假说。目前对大碰撞假说研究较多,但研究者们始终无法较好解释地月系统氧同位素的高度一致等特征。本文试探性提出新的月球起源分裂模型,能较好的解释某些月球特征,引起研究者们对月球起源新的思考。The moon is the only satellite of the Earth,which was conventionally believed to be common in solar system.But many characters of the moon,such as large size,lack of volatile substance and iron element,are difficult to be interpreted by conventional theory.Based on these characters,scientists have suggested four theories,capture model,coaccretion theory,Earth fission theory and collision ejection model,among which collision ejection model is widely accepted currently.Collision ejection theory suggests that the moon was assembled from a disk of ejected material of the Earth during its collision with another planet.Researchers have done many physical simulations to support this collision ejection theory,but some features,like identical oxygen isotopic composition between Earth and the moon,cannot be explained well.A new model is raised in this paper and it may throw some light on the lunar formation.

关 键 词：月球 捕获理论 共增生理论 分裂理论和大碰撞假说 

分 类 号：P184.1[天文地球—天文学]