科学与健康|1935.3克“月背土特产”再出新成果！里面藏着什么秘密？

Core Viewpoint - The Chang'e 6 mission has successfully returned samples from the Moon's far side, revealing significant insights into the South Pole-Aitken basin and its impact on lunar evolution [2][3][5]. Group 1: Chang'e 6 Mission Achievements - The Chang'e 6 mission achieved the world's first lunar far side sample return, bringing back 1935.3 grams of samples [2]. - The Chinese Academy of Sciences published four major research findings in the journal "Nature," systematically revealing the effects of the South Pole-Aitken impact [2][3]. Group 2: Geological Insights - The South Pole-Aitken basin is identified as the largest and oldest impact feature on the Moon, formed by a massive collision approximately 4.25 billion years ago [6]. - The research indicates that volcanic activity occurred on the Moon's far side around 4 billion and 2.8 billion years ago, lasting at least 1.4 billion years [6]. Group 3: New Discoveries - A new type of rock, termed South Pole-Aitken basin impact lava, was discovered, providing new insights into the Moon's formation and evolution [6]. - The study revealed that the Moon's far side has a significantly lower water content in the mantle compared to the near side, indicating a "bipartite" distribution of water within the Moon [6][7]. Group 4: Understanding Lunar Dichotomy - The concept of "ultra-depleted mantle" was introduced, suggesting that the far side's mantle is extremely poor in incompatible elements like potassium and rare earth elements [7][9]. - The formation of the "ultra-depleted mantle" may be linked to the initial differentiation of the magma ocean and subsequent volcanic activity that altered the shallow mantle region [7][9].