The origin of the Moon and its isotopic geochemical constraints
The Moon,the only natural satellite of the Earth,has its formation and evolution that are closely related to those of the Earth.At present,although the Giant Impact Hypothesis has become the dominant view of the origin of the Moon,this hypothesis has difficulty explaining some isotope compositions,such as the similarity in oxygen isotope composition,between the Earth and the Moon.A series of new collision models and theories have been proposed to reconcile these discrepancies,yet they remain ensnared in controversy and imperfection.With the advancement of high-precision isotope analysis and numerical simulation techniques,a large amount of new data on isotopic compositions of the Moon and the Earth continues to emerge,providing more possibilities for understanding events related to the origin of the Moon.Therefore,this paper reviews the research progress on the origin of the Moon and summarizes the current status of collision models and related theories.We focus on the isotope geochemical constraints that shape the lunar origin events and discuss their implications in different models,aiming to deepen our understanding and knowledge of the origin and evolution of the Moon,the Earth-Moon system,and the solar system.
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