大型撞击造成月幔“蒸发”？

Core Insights - The Chang'e 6 mission has revealed new findings regarding the differences in evolution between the Moon's near side and far side, addressing a long-standing scientific mystery [1] - High-precision potassium isotope analysis of samples from the Moon's far side has shown that the impact event in the South Pole-Aitken Basin led to the loss of moderately volatile elements in the mantle, providing crucial evidence for understanding the effects of large impacts on lunar evolution and the causes of the Moon's "bipolarity" [1] Group 1 - The research team conducted high-precision potassium isotope analysis on milligram-level basalt samples from Chang'e 6, revealing that the potassium isotope ratios differ from those of samples from the Moon's near side, confirming changes in the mantle due to the impact event [1] - The loss of volatile elements during the high-temperature and high-pressure conditions of the impact may suppress the formation of deep lunar magma and volcanic activity on the far side, offering new clues for understanding the geological evolution asymmetry between the Moon's near and far sides [2] - The related findings were published in the Proceedings of the National Academy of Sciences of the United States of America on January 13 [3]